The pressure of the gas can be determined using ideal gas equation. The pressure of neon in the tank is 9.7 atm.
What is ideal gas equation ?Ideal gas equations states the relation between volume, pressure, temperature and number of moles of gas as written below:
PV = nRT.
Where R is the universal gas constant equal to 0.082 L atm/K mol.
Given the volume of the tank V = 10 L
number of moles n = 4 moles
temperature = 22 ° C = 295 k
Then pressure P = nRT/V.
Pressure of neon gas = 4 moles × 295 K× 0.082 L atm/K mol /(10 L)
P = 9.7 atm.
Therefore, the pressure of the neon gas in the tank is 9.7 atm.
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what is the molarity of a solution prepared by dissolving 2.0 g n a o h 2.0 g naoh in water to make a total solution volume of 250 ml 250 ml?
The molarity of the solution will be 0.4M.
The unit of measurement for a chemical compound is the mole. The term "molarity" in science refers to a substance's concentration, which is determined by dividing its molecular mass by the volume of the solution it is in.
As given,
Weight of NaOH = 4g
Molecular weight of NaOH = 40 G
Volume of the solution is 250ml
Molarity = ?
M = (W / MW ) × (1000 / V(in ml))
M = ( 4 / 40) × (1000 / 250)
0.4M
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Match the following parts of the earth with the correct definition. 1. solid, outer layer of the earth core 2. layer between the crust and the core asthenosphere 3. semi-liquid region directly beneath the crust mantle 4. made of iron and nickel hydrosphere 5. the water covering the surface of the earth crust
1) crust 2)mantle 3) asthenosphere 4)core 5) hydrosphere are the correct matches for the given options.
Iron is what?A atomic number 26 & chemical symbol Fe are given to the element iron. It is a metal that belongs to the first transition series and the eight group of a periodic table. It is the most common element on the planet by mass, just above of oxygen, and makes up a significant amount of both the outer and inner core of the planet.
how is iron used by the body?Iron is found in substantial amounts in hemoglobin, a type of protein found in red blood cells that delivers oxygen from lungs to each and every part of the body. If the body doesn't have enough iron, it won't produce enough red blood cells to deliver oxygen, which leads to fatigue.
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Solve this problem using the appropriate law.
uranium contains two isotopes, u-235 with an atomic mas of 235 g/mol, and u-238 with an atomic mass of 238g/mol. u-235 is needed as a fuel in nuclear reactors. until recently, the method used to separate u-235 from u-238 was by gas diffusion. use u-235 as r1 and u-238 as r2 and determine the rate of diffusion and which gas will diffuse faster.
u-235 diffused 1.01 times slower than u-238
u-235 effused 1.01 times faster than u-238
u-235 effused 2.01 times slower than u-238
u-235 diffused 1.01 times faster than u-238
u-235 diffused 10.01 times faster than u-238
The appropriate law for this problem is Graham's Law of Effusion and Diffusion.
What is appropriate law?Appropriate law is the legal framework and regulations that are established to ensure fairness and justice within a society. It defines the rights and responsibilities of individuals, businesses, and governments, and helps to promote the public good.
Graham's Law states that the rate of effusion or diffusion of a gas is inversely proportional to the square root of its molecular weight. This means that the lighter the gas, the faster the rate of effusion or diffusion. In this case, u-235 has an atomic mass of 235 g/mol, while u-238 has an atomic mass of 238 g/mol. This makes u-235 the lighter gas, so it will diffuse faster than u-238. Therefore, the answers to the questions are:
u-235 diffused 1.01 times faster than u-238
u-235 effused 1.01 times slower than u-238
u-235 effused 2.01 times slower than u-238
u-235 diffused 1.01 times faster than u-238
u-235 diffused 10.01 times faster than u-238
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Decide which of these pairs of reactants react, and write word equations for the reactions; magnesium and copper oxide; zinc and magnesium oxide; zinc and copper sulfate solution.
Answer:
Mg + CuO2 = MgO + Cu+
Zn + MgO= ZnO + Mg
Zn + Cuso4 = ZnS + SO2 + Cu
what are the conditions for reaction like are they cocentrated?
Look at the picture below.
What does this picture represent?
A. Atoms that are ions
B. Atoms with a covalent bond
C. Atoms with no bond
D. Atoms with
The picture below represents atoms with a covalent bond. Option B is the correct answer.
In order to maintain stability, covalent bonds, a particular kind of chemical link, form between hydrogen atoms, nonmetals, and semimetals. The exchange of one or more pairs of electrons between two atoms forms a covalent connection. The two atomic nuclei are drawing these electrons in unison.
When there is insufficient space between two atoms' electronegativities for an electron transfer to take place and create ions, a covalent bond is formed. In organic chemistry, covalent bonds predominate over ionic bonds by a wide margin.
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The complete question is:
Look at the picture below.
What does this picture represent?
A. Atoms that are ions
B. Atoms with a covalent bond
C. Atoms with no bond
D. Atoms with
which amount has the greatest mass? responses 1 mole of sodium 1 mole of sodium 1 mole of oxygen 1 mole of oxygen 1 mole of chlorine 1 mole of chlorine 1 mole of uranium
Simply compare the options' masses to determine which has the highest mass as each has only one mole. The most abundant element is uranium, which has roughly 238 amu.
A chemical compound's mass M is equal to its amount of material, expressed in moles, multiplied by its mass. Calculators for molar mass, molecular weight, and elemental makeup can be found online. One mole of sodium atoms contains around 23 grams or 1 Na atom, which has an estimated mass of 23 u. The approximate mass of one oxygen atom is 16 u, or around 16 g, for one mole of oxygen atoms. One mol of chlorine atoms has an approximate mass of 35.453 grams, or 35.453 u for one chlorine atom. Finally one uranium contains 238u. Compared with other molecules uranium has the greatest mass.
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How many molecules are in a sample of water with a mass of 44.99 grams
Answer:
44.99
⋅
g
18.01
⋅
g
⋅
m
o
l
−
1
×
N
A
, where
N
A
=
Avogadro's number
6.022
×
10
23
⋅
m
o
l
−
1
.
Explanation:
Part A - CI - I - OH - C2H5 Rank from largest to smallest. To rank items as equivalent, overlap them.
As atomic number increases, priorities rise. Iodine is therefore given precedence over bromine, oxygen is given less importance. Carbon has a lower priority than oxygen since it has a lower atomic number.
What is carbon?All life on Earth depends on carbon for its chemical structure. The amount of carbon that exists on Earth now is the same as it has always been. Carbon creates essential compounds like protein and DNA when new life is created. Additionally, it can be found in our atmosphere as carbon dioxide, or CO2.
What components makes up carbon?The nucleus of a carbon atom is made up of six protons and six neutrons, and it is encased in six electrons. According to quantum physics, the first two electrons must occupy the innermost atomic orbital, while the wavefunctions of the following four electrons only partially fill the second standard and three second principal orbitals.
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if 17.04 g n2 is mixed with 8.160 g h2, calculate the theoretical yield (g) of nh3 produced by the reaction.
the theoretical yield (g) of nh3 produced by the reaction if 17.04 g n2 is mixed with 8.160 g h2 , is 20.66g
The theoretical yield of NH3 produced by the reaction of 17.04g of N2 and 8.160g of H2 can be calculated using the balanced equation for the reaction: N2 + 3H2 --> 2NH3. To calculate the theoretical yield, we need to determine how many moles of NH3 will be produced from the given amounts of N2 and H2. First, we convert the given masses of N2 and H2 to moles. For N2: 17.04 g / 28.02 g/mol = 0.608 mol. For H2: 8.160 g / 2.016 g/mol = 4.04 molSince the balanced equation states that the reaction requires 3 moles of H2 for every 1 mole of N2, we can use the ratio of moles of H2 to moles of N2 to determine how much N2 is needed. 4.04 mol H2 / 3 mol H2/1 mol N2 = 1.34 mol N2. Since we have 0.608 mol of N2 and we need 1.34 mol of N2, we can't produce NH3 using all the N2, so we use the amount of N2 we have and find how much NH3 we can produce.0.608 mol N2 * 2 mol NH3/1 mol N2 = 1.216 mol NH3. To convert the moles of NH3 back to mass, we use the molar mass of NH3 (17.03 g/mol). 1.216 mol NH3 * 17.03 g/mol = 20.66 g NH3. So the theoretical yield of NH3 produced is 20.66 g.
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C6H12O6 (glucose) + 6O2 → 6 CO2 + 6H2O
Where is most of the water in this reaction produced?
a. fermentation
b. Krebs cycle
c. glycolysis
d. electron transport chain
According to the claim made, an electron transport chain produces the majority of water.
What does the term "reaction" in chemistry mean?In a chemical reaction, one or more chemicals, usually known as reactants, change into same or more other compounds, frequently referred to as products.
In this process, the electron transport chain is where the majority of the water is created. Either NADH or FADH2 contribute high energy electron carriers chain. When an electron enters an electron transport chain, its energy steadily decreases. Most of the water generated in the aforementioned process is created by low-energy electron reduction of oxygen molecules.
When 2-phosphoglycerate is transformed into phosphoenol pyruvate during the glycolysis process, two droplets are created for every molecule of glucose. At the stage where Acetyl-CoA exits the Kreb Cycle but also is coupled to Oxaloacetate by Hydroxide Synthase to form Sulphate and at the step where Fumerate is reduced to Malate by Water with the aid of Fumerase, two water molecules are input into the Kreb Cycle. Ethanol, lactic acid, carbon dioxide, and hydrogen gas are byproducts of fermentation. Therefore in method, there is no byproduct of water.
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A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar System. Mass-spectroscopic analysis produced the following data on the isotopes of ruthenium in these samples:
In general, the mass m of each isotope times its natural abundance p yields the atomic mass A of an element, which can be calculated by adding the resulting numbers: 44\sRu\s99.9
What does atomic mass mean?The average mass of an element's atoms expressed in atomic mass units is known as its atomic mass (amu, also known as daltons, D). The atomic mass of an element is a weighted average of all of its isotopes and is calculated by multiplying each isotope's mass by its abundance.
What is meant by an atomic number?The periodic system, which arranges the elements in increasing order of the number of protons in their nuclei, uses each element's atomic number to identify it. Because there are always the same number of protons and electrons in a neutral atom, the number of protons also determines the atomic number.
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Under a pressure of 3000Nm^-2, a gas has a volume of 250cm³. What will its volume be if the pressure is changed to 1000mmHg at the same temperature? (760mmHg= 101325Nm^-2)
A new volume of 80ml results from changing the pressure to 1000mm Hg.
How do you calculate volume after pressure change?PV=nRT under the ideal gas law P V = n R T, where P is pressure, V is volume, n is the molecular mass, R is the constant of universal gas, and T is the temperature.The ideal gas law, PV = nRT, is a specific example of these laws, where P is the gas's pressure, V is its volume, n is the number of moles in the gas, T is the gas' kelvin temperature, and R is the ideal gas constant.For instance, if you wish to determine the volume of 40 moles of a gas at a temperature of 250 K and a pressure of 1013 hPa, the formula is V = nRT/p = 40 * 8.31446261815324 * 250 / 101300 = 0.82 m3.To learn more about pressure refer to:
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mg(hso3)2 decomposes into a solid x, h2o vapor, and so2 gas. if 186 g of mg(hso3)2 decomposes completely and leaves behind 40 g of solid x, what is the identity of x?
mg(hso3)2 breaks down together into solid x, water vapor, then so2 gas. This figure is reasonably near to an established rate of 36 g for verify the outcome when 186 g o mg(hso3)2 completely decomposes & leaves only 40 g pure solid.
What does "decompose" mean in practice?When one reactant splits to two or more products, it is called a decomposition reaction. The general equation AB A + B can be used to describe this. Hydrogen peroxide breaking down into water and oxygen and water breaking down into hydrogen and oxygen are both examples of decomposition reactions.
What is the opposite of decompose?Decompose has a number of frequent synonyms, including decay, putrefy, rot, & ruin. All of these terms refer to "to experience destructive disintegration," but the word "decompose" emphasizes a breakdown by chemical change and, when used in reference to biological stuff, a corruption
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Electrons are charged particles_ The amount of charge that passes per unit time is called The driving force for the electrons (i.e _ the reason they are flowing in the first place) is measured by potential. voltage. current: charge: potential: current: Charge is measured in Current is measured in joules (J) volts (V) amperes (A) volts (V) coulombs (C) coulombs (C): amperes (A) joules (J) Potential is measured in amperes (A) joules (J) coulombs (C) volts (V)
The smallest elemental component of an atom, the electron has a negative charge.
The correct option are:
1. (b) current
2. (c) potential
3. (b) coulombs (C)
4. (a) amperes (A)
5. (d) volts (V)
Particles like electrons and protons have electric charge as one of their properties. Protons and electrons are positively and negatively charged subatomic particles, respectively.
Coulomb, represented by the letter C, is a unit of measure for an object's electric charge.
The net flow of electric charges through a specific area per unit of time is known as current or electric current. The unit of measurement for electrical current is the ampere, or A.
Possibility or The effort put forth to transfer electric charges from one location to another is referred to as electric potential. Potential, represented by the letter V and measured in volts, is what drives the movement of charges.
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In the 1950s, the scientists Alfred Hershey and Martha Chase carried out an experiment using bacteriophages, which are viruses that infect bacteria. During the experiment, the scientists allowed bacteriophages that had been labeled with either radioactive phosphorus or radioactive sulfur to infect bacterial cells. After the infection process occurred, the scientists determined the locations of the radioactive elements.
After carrying out their experiment, the scientists concluded that bacteriophages inject DNA (a type of nucleic acid), but not protein, into host bacterial cells during infection.
Based on the scientists' conclusion, which of the following describes the most likely result of the experiment?
The scientists would likely find that the radioactive phosphorus was located inside the host bacterial cells and the radioactive sulfur was located outside the host bacterial cells.
What is bacterial cells?Bacterial cells are single-celled organisms that are found in a wide variety of habitats. They are prokaryotic, meaning they do not have a nucleus or other organelles. Instead, their genetic material is contained in a single circular chromosome, which is found within the cytoplasm. Bacterial cells contain a variety of structures, including cell walls, flagella, and pili, which help them to move, attach to surfaces, and communicate with other cells.
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ammonia chemically reacts with oxygen gas to produce nitric oxide and water . what mass of nitric oxide is produced by the reaction of of ammonia? be sure your answer has the correct number of significant digits.
The answer is not provided, as the amount of nitric oxide produced depends on the amount of ammonia used in the reaction.
What is nitric oxide?Nitric oxide (NO) is a colorless and odorless gas that acts as a signaling molecule in the human body. It is produced within the cells of many organisms, including humans, and plays an important role in many physiological and pathological processes. It is a key component of the cardiovascular system, where it is responsible for regulating blood pressure, dilating arteries, and preventing platelet aggregation. NO also acts as a neurotransmitter in the nervous system, where it is involved in learning, memory, and pain modulation. In addition, it has anti-inflammatory and anti-tumor properties and is involved in wound healing and immune functioning. NO also plays a role in the regulation of cell metabolism and growth.
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How does the molecular structure of an object determine its purpose or function?
Answer: Each molecule has a characteristic size and shape that determines its function in the living cell
Explanation:
The shapes of molecules are determined by the positions of the atoms' orbitals. When an atom forms covalent bonds, the orbitals in its valence shell are rearranged.
A 0.100 M solution of ethylamine (C2H5NH2) has a pH of 11.87. Calculate the Kb for ethylamine.
According to the question: the Kb for ethylamine is 7.59 x 10^-14.
What is ethylamine?Ethylamine is an organic compound with a chemical formula of C2H7N. It is a colorless liquid with an ammonia-like odor.
Kb is the acid dissociation constant for bases. It is defined as the equilibrium constant for the reaction in which a base reacts with water to form its conjugate acid and hydroxide ions:
B + H2O → HB+ + OH-
The Kb for ethylamine can be calculated using the equation:
Kb = [HB+][OH-] / [B]
For a 0.100 M solution of ethylamine, the concentration of ethylamine is 0.100 M and the pH is 11.87.
First, we need to calculate the concentration of hydroxide ions ([OH-]) from the pH.
The pH of a solution is equal to the negative logarithm of the molar concentration of hydrogen ions ([H+]):
pH = -log[H+]
Therefore, the molar concentration of hydroxide ions ([OH-]) can be calculated as:
[OH-] = 10^-pH = 10^-11.87 = 7.59 x 10^-12 M
Now, we can calculate the Kb for ethylamine as:
Kb = [HB+][OH-] / [B]
= (7.59 x 10^-12 M) / (0.100 M)
= 7.59 x 10^-14
Therefore, the Kb for ethylamine is 7.59 x 10^-14.
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Consider the ionization energy (IE) of the magnesium atom. Which of the following is not true? Select one: a. The IE of Mg is lower than that of sodium. b. The IE of Mg is lower than that of neon. c. The IE of Mg is lower than that of beryllium. d. The le of Mg is higher than that of calcium. e. The IE of Mg is lower than that of Mgt.
d. The IE of Mg is higher than that of calcium is not true for the the ionization energy (IE) of the magnesium atom.
What is an ionization energy defined for the magnesium atom?The ionization energy (IE) of an atom is the energy required to remove an electron from the atom. The IE of magnesium (Mg) is lower than that of sodium and neon, but higher than that of beryllium. The IE of Mg is lower than that of Mgt (Which is not an element) and higher than that of calcium.
What is difference between Mg and Ca based on their properties?Mg and Ca are both located in the same group (group 2) in the periodic table and have similar electron configurations. However, the IE of Mg is higher than that of Ca because the valence electrons in Mg are held more tightly than in Ca due to the increase in the effective nuclear charge.
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Refer to the hydrogen isotopes in Model 1. Each isotope has a special name derived from Latin (protium, deuterium, and tritium). What structural feature do these names refer to in the atom
The structural feature that gives isotopes special names like protium, deuterium, and tritium refers to the number of neutrons each isotope has.
Protium is the most common and stable form of hydrogen, it has one proton and no neutrons in its nucleus.
Deuterium is a stable isotope of hydrogen that has one proton and one neutron in its nucleus.
Tritium is a radioactive isotope of hydrogen that has one proton and two neutrons in its nucleus.In summary, protium refers to the number of protons in the nucleus, deuterium refers to the number of neutrons and protons in the nucleus and tritium refers to the number of neutrons in the nucleus.
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Which pairs of elements are likely to form ionic bonds and which pairs are likely to form covalent bonds?
A. P and S
B. Li and Br
C. K and F
D. Mg and O
The pairs of elements which forms covalent bonds. P and S are the elements which forms iconic bond are D. Mg and o.
An ionic bond that is produced between metallic and non-metallic atoms, here the electrons are completely transferred from one atom to another in this process. During this process, one atom loses electrons and another one gains them in this process, forming ions. The metal gives up the electrons forming a cation which results in nonmetal element, which forms an anion. In this process the octet rule is fulfilled which means that this rule states that each atom in a molecule requires 8 valence electrons (in the last layer) to remain stable.
The covalent bond can be defined as the chemical bond between atoms where electrons are shared, forming a unit called molecule. Covalent bonds are the ones that are established between non-metallic elements, like hydrogen H, oxygen O and chlorine Cl. These elements have electrons in the outermost level and have a tendency to gain electro which acquire the stability of the electronic structure of the noble gas like He. In other words, sharing electrons, non-metallic elements must lose or gain in order to comply with the Octet rule.
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Calculate the mass of vanadium(v) oxide (v2o5) that contains a million (1.0 *10^6) vanadium atoms. be sure your answer has a unit symbol if necessary, and round it to 3 significant digits.
A million (1.0 ×10^6) vanadium atoms are present in 1.510 ×10^13 g of vanadium(v) oxide (v2o5).
Vanadium atom count: 1,000 to 10^^9 atoms
Step 2: Determine the V2O5 molecules with 1.000× 10^9 V atoms.
V2O5 molecules contain 2 V atoms each.
0.5000× 10^9 molecule V2O5 = 1.000 109 atom V (1 molecule V2O5/2 atom V)
Step 3: Determine the number of moles that equate to 0.5000× 10^9 molecules of V2O5.
We shall utilize Avogadro's number: 6.022 x 10^23 molecules of V2O5 make up 1 mole of the substance.
1 mol/6.022 10^23 molecules divided by 0.5000 109 molecules equals 8.303 10^16 molecules.
Step 4: Determine the mass equal to 8.303 1016 moles of V2O5.
V2O5 has a molar mass of 181.88 g/mol.
8.303 × 10⁻¹⁶ mol
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How many protons are in an isotope of sodium with a mass number of 25?
a. 11
b. 14
c. 15
d. 25
e. 32
Protons that are present are in an isotope of sodium with a mass number of 25 are a.) 11. Hence, option a) is correct.
What do you understand by isotope?Isotopes are two or more types of atoms that have same atomic number and position in the periodic table, but that differ in nucleon numbers due to the different numbers of neutrons in their nuclei.
Atoms with same number of protons and different numbers of neutrons are known as isotopes. They share almost same chemical properties but have different mass and therefore different physical properties. Example: carbon 12, carbon 13, and carbon 14 are all isotopes of carbon.
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The empirical formula of a compound is C5H7O. What is the molecular formula if the molecular mass is 249.3 g/mol.
Answer:The molecular formula is C5 H10 O5 .
Explanation:
for the neutralization reaction below in which a strong base is reacted with a strong acid lioh hcl --> h2o na cl- how many grams of lithium hydroxide are needed to completely neutralize 500 ml of a 0.2 m solution of hcl?
2.395 grams of lithium hydroxide are needed to completely neutralize 500 ml of a 0.2 m solution of HCl.
What do you mean by neutralization reaction?A chemical reaction between an acid and a base that results in a more neutral solution is known as a neutralization reaction. The strength of the acid and base used in the reaction determines the pH of the solution.
For the neutralization reaction: LiOH + HCl -> H2O + NaCl
To find the number of moles of HCl present in the solution:
0.2M * 0.5L = 0.1 moles of HCl
As the reaction is a neutralization reaction, the number of moles of HCl will be equal to the number of moles of LiOH used in the reaction.
Now, we know the number of moles of LiOH used in the reaction is 0.1 moles.
To find the mass of LiOH used in the reaction, we can use the formula: mass = moles * molar mass
The molar mass of LiOH is 23.95 g/mol.
mass = 0.1 moles * 23.95 g/mol = 2.395 g of LiOH.
Therefore, 2.395 grams of lithium hydroxide are needed to completely neutralize 500 ml of a 0.2 m solution of HCl.
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Why are some areas of Earth concentrated with minerals while others are not? *
-some areas of Earth have past or current volcanic activity
-some areas of Earth were swamps in the past
-minerals can only form near water
-the climate in certain areas is ideal for mineral formation
SCIENCE WORK*
Some areas of earth is concentrated with minerals because, some areas of earth have past or current volcanic activity. Hence, option A is correct.
What are minerals ?Minerals are naturally occurring inorganic compound with a definite composition and crystalline structure. For example, calcium carbonate, iron oxide etc. are mineral deposits.
Aluminum, diamonds, gold, nickel, lead, zinc, and copper minerals are produced or hosted by volcanoes directly or indirectly. The majority of these materials are used regularly by humans, and throughout the course of our lifetimes, we use significant amounts of certain of these minerals.
Many of the most significant metals that are mined on Earth had their beginnings in volcanic settings, either directly or indirectly. For instance, a volcanic rock may never reach the surface of the earth and will thus cool slowly in plutonic conditions.
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Pant A Classify these amino acids as acidic basic, neutral polar neutral nonpolar Drag each item t0 the appropriate bin: View Available Hint(s) Reset Help Acidic Basic Neutral polar Neutral nonpolar NHz NHz CHz CH; CHz CHz CHz HSN COO CHz HSn COO CHz Asn COO CHs Hn COO Lewcing Angirine Axrargine Alarire Submit Previous Answers Incorrect; Try Agaln; 2 attempts remaining
Classification of given amino acids are done according to question.
Part A: Leucine: Neutral nonpolar
Asparagine: Neutral polar
Glutamine: Neutral Polar
Alanine: Neutral Nonpolar
Arginine: Basic
Part B:
Methionine: neutral nonpolar
Proline: Neutral Nonpolar
Serine: Neutral polar
Lysine: Basic
Phenylalanine: neutral nonpolar
What are the top three amino acids?Unlike non-essential amino acids, your body cannot make BCAAs, so they are regarded as essential. As a result, it is imperative to include them in your diet. Leucine, isoleucine, and valine make up the trio of BCAAs. They are all thought to be necessary for the human body and all have branched molecular structures.
More than one -COO⁻ group can be found in the structures of basic amino acids, while more than one NH₃⁺ group can be found in the structures of acidic amino acids. An amino acid becomes polar when it contains polar side chains like -OH or amide.
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a chemist has one solution that is 10% salt and 90% water and another solution that is only 2% salt. how many milliliters of each should the chemist use to make 1400 ml of a solution that is 6% salt? solution
700 ml of 10% salt solution and 700 ml of 90% water should the chemist use to make 1400 ml of a solution that is 6% salt.
What is solution?In chemistry, a solution is a homogeneous combination of two or more compounds in their relative proportions. The composition of the solution can be continually changed up to the solubility limit. Although the term "solution" is frequently used to refer to the liquid state of matter, mixtures of gases and solids are also possible.
When one material dissolves, or separates into another, a solution is created. Solute refers to the material that dissolves to create a solution. A solvent is a substance that helps a solute dissolve. Water serves as the solvent and sugar as the solute in a sugar-water solution.
Given that,
Total solution = 1400 ml
now, x + y = 1400 ....... (i)
Here, x = salt in ml
y = water in ml
Next, 10% salt and 90% water for one solution
another solution that is only 2% salt
Thus, 0.1x + 0.02y = 1400
x + 0.2y = 840 ....... (ii)
Now, from equation (i) and (ii) we get -
0.8 y = 560
or, y = 700 ml
now, x = 1400 - y
or, x = 700 ml
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two flexible containers for gases are at the same temperature and pressure. one holds 0.50 grams of hydrogen and the other holds 8.0 grams of oxygen. which is false?
A) The volume of hydrogen container is the same as the volume of the oxygen container. This statement is false for the given gases are at the same temperature and pressure.
What is the explanation to the false statement for the given gases hydrogen and oxygen?According to the ideal gas law PV = nRT, the volume of a gas sample is proportional to the number of moles of the gas present, assuming that the pressure and temperature are constant. Since the number of moles of hydrogen is much less than the number of moles of oxygen (0.50 grams of hydrogen is roughly equivalent to 0.01 moles while 8.0 grams of oxygen is roughly equivalent to 0.2 moles), the volume of the hydrogen container would be much smaller than the volume of the oxygen container.
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two flexible containers for gases are at the same temperature and pressure. one holds 0.50 grams of hydrogen and the other holds 8.0 grams of oxygen. which of the following statement regarding these gas samples is false?
A)the volume of hydrogen container is the same as the volume of the oxygen container
B) the number of molecules in the hydrogen container is the same as the number of molecules in the oxygen container
C) the density of hydrogen sample is less than that of oxygen sample
D) the average kinetic energy of the hydrogen molecules is the same as the average kinetic energy of the oxygen molecules
E) The average speed of hydrogen molecules is the same as the oxygen molecules
Ammonia, NH3, is a weak base with a Kb value of 1.8×10−5. What is the pH of a 0.205 M ammonia solution?
A weak base, ammonia solution will dissociate into: NH3 + H2O. Initial combination: NH4+ + OH- , The pH of a 0.205 M ammonia solutionpH = 11.3
How harmful is ammonia?Quite poisonous is ammonia. Lungs, eyes, & skin can become seriously corroded by it. Ammonia poisoning can potentially lethal. Ammonia can injure people permanently by causing blindness and lung issues, for example.
Why would someone use ammonia?Approximately 80% of a ammonia produced from industry is used as fertilizer in agriculture. In addition to these uses, ammonia is also employed in the production of polymers, explosives, textiles, insecticides, dyes, and other compounds. It also serves as a refrigerant gas.
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