Answer:
To find the number of moles in 78.3 grams of ammonium sulfite, you would divide the mass by the molar mass of the substance. The molar mass of ammonium sulfite is (14.0067 + 14.0067 + 32.065 + 64.0638) g/mol = 124.1472 g/mol.
78.3 g / 124.1472 g/mol = 0.63 moles
Explanation:
Answer:
0,6746 moles of ammonium sulfite
Explanation:
(NH₄)₂SO₃ - ammonium sulfite [tex]\equiv \, N_2H_8SO_3[/tex]
Atomic weight of each element:
N = 14.00 * 2 = 28
H = 1.00 * 8 = 8
S = 32.065 * 1 = 32.065
O = 16 * 3 = 48
Total atomic weight = 28 + 8 + 32.065 + 48
Total atomic weight = 116,065 gr/mol
[tex]78.3\,g \,* \frac{1mol\,of\, (NH_4)_2SO_3}{116.065g \, \,of \, (NH_4)_2SO_3 } \approx 0,6746\, moles \, of \, (NH_4)_2SO_3[/tex]
A 0.04373 g sample of gas occupies 10.0 mL at 291.0 K
and 1.10 atm. Upon further analysis, the compound is found to be 25.305% C
and 74.695% Cl.
What is the molecular formula of the compound?
The molecular formula of the compound is C₂Cl₂.
The empirical formula of a chemical compound is the smallest ratio of elements present in the compound. From the analysis
Percentage of C = %C = 25.305% Percentage of Cl = %Cl = 74.695% Atomic massCalculate the number of moles of the compound using the ideal gas equation P × V = n × R × T
n = number of moles (mol) T = temperature = 291.0 K R = gas constant = 0.0821 L atm /mol KP = pressure = 1.10 atmV = volume = 10.0 mL = (10.0 ÷ 1,000) L = 0.01 LP × V = n × R × T
1.10 × 0.01 = n × 0.0821 × 291.0
0.011 = n × 23.8911
n = 0.011 ÷ 23.8911
n = 4.6 × 10⁻⁴ mol
Calculate the molecular mass using Stoichiometry n = m ÷ M
m = mass = 0.04373 g M = molecular mass (g/mol)n = number of moles = 4.6 × 10⁻⁴ molM = m ÷ n
M = 0.04373 ÷ (4.6 × 10⁻⁴)
M = 95.0 g/mol
The molecular mass for the compound equals the molecular mass from the empirical formula times n.
M = M ((CCl)ₙ)
95.0 = (12 + 35.5) × n
95.0 = 47.5 × n
n = 95.0 ÷ 47.5
n = 2.1
n ≈ 2
The molecular formula times 2 from the empirical formula C₂Cl₂
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As co2 increases the length of day’s increases true or false
Answer: False
Explanation:
There are no scientific proofs that an increase in co2 levels leads to an increase in the length of days, but there may be an explanation for how the appearance of the day matters to an individual as an increase in co2 concentration leads to an increase in the temperature of the earth (greenhouse effect) also its increases the temperature at the sunset and hence leads to a misunderstanding that the effect of sn is still there hence increasing the length of the day but this is clearly wrong and is reported by very few individuals, there is no direct relation of increase in co2 content and increase in day's length
Nitrogen gas reacts with hydrogen gas to produce ammonia according to the following equation: N2(g)+3H2–>2NH3(g)
What is the mass of ammonia produced from 6.5 grams of hydrogen reactant, assuming there is a sufficient nitrogen to react? Give an explanation
a. 4 g NH3
b. 8 g NH3
c. 37 g NH3
d. 55 g NH3
As per the balanced reaction, 3 moles or 6 g of hydrogen gas produces 2 moles or 34 g of ammonia. Then, 6.5 g of hydrogen produces 36.8 g of ammonia.
What is ammonia ?Ammonia is a covalent compound formed from the nitrogen atom and three hydrogen atoms. The process of manufacturing of ammonia is called Haber process.
As per the balanced reaction, 3 moles or 6 g of hydrogen gas produces 2 moles or 34 g of ammonia. Then, 6.5 g of hydrogen produces 36.8 g of ammonia.
The mass of ammonia produced from 6.5 g of hydrogen is calculated as follows:
mass of ammonia = (6.5 × 34 g) / 6 g = 36.8 g
Therefore, the mass of ammonia produced from 6.5 g of hydrogen gas is 36.8 g.
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Which of the following is the balanced chemical equation for the combination reaction between lithium metal and oxygen gas?
a) 4 Li(s)+O2(g) → 2 Li2O(s)
b) Li(s)+O(g) → LiO(s)
c) 2 Li(s)+O2(g) → 2 LiO(s)
d) Li(s)+O2(g) → LiO2(s)
Answer:
Explanation:
a
Suppose a beaker of orthoxylene is put inside a sealed tank containing orthoxylene gas at 142. degree C and 893. torr. After ten minutes, will there be more liquid in the beaker, less liquid, or the same amount?
The beaker of orthoxylene was put inside a sealed tank containing orthoxylene gas at 142. degree C and 893. torr will have the same amount of liquid inside it after ten minutes because the system is a closed system as none of the liquid's vapor escapes.
The correct option is the same amount.
A closed system allows energy to enter and exit but not matter to enter or exit. About a closed system is a covered pot on the burner. Both matter and energy cannot enter or leave an isolated system. A thermos or cooler is about as isolated a system as there is.
The beaker of orthoxylene that was put inside a sealed tank containing orthoxylene gas at 142 degrees C and 893 torr is a closed system.
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Q₁ differenciate using suitable examples between atomic number It's atomic mass of an element
Answer:
A measure of an element's identity is determined by its atomic number, and its weight is determined by its atomic mass.
Explanation:
The amount of protons in the nucleus of an element's atom is known as the element's atomic number. It serves to identify and categorize the elements in the periodic table and is particular to each element. The chemical characteristics of an element are determined by its atomic number.
An element's atomic mass is its average atom's mass, which is typically expressed in atomic mass units (amu). It is the total number of protons and neutrons in the nucleus of an atom. The atomic mass can be a decimal and is not always a number.
A measure of an element's identity is determined by its atomic number, and its weight is determined by its atomic mass.
If CCL4 contain 9.903g what is the mass percentage of carbon in the compound
The mass percentage of C is 7.8 %
What do you mean by mass percentage?The method for expressing a concentration is known as mass percent. The solution components of a given solution can be defined by the mass percentage.
The molar mass of CCL4 is carbon 12.0107g + 4*chlorine 35.453g = 153.823g.
The number of moles of carbon in CCL4 can be found by dividing the mass of carbon (12.0107g) by the molar mass of carbon (12.0107g/mol).
The mass percentage of carbon in CCL4 can be found by multiplying the number of moles of carbon by the molar mass of CCL4 and dividing by the total mass of CCL4, then multiplying by 100.
So, mass percentage of C = (12.0107g / 153.823g) * 100 = 7.8 %
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The psychological response to aging is negatively influenced by what
Answer:
isolation, loneliness or psychological distress
Explanation:
In addition, older people are more likely to experience events such as bereavement, or a drop in socioeconomic status with retirement. Sadly these stressors can result in isolation, loneliness or psychological distress in older people. Mental health has an impact on physical health and vice versa.
What is the mass of 5 moles of al2o3? (Show work please)
Answer: 509.8 g
Explanation:
5 moles Al₂O₃
Al: 2 x 26.98 g = 53.96 g
O: 3 x 16.00 g = 48.00 g
Total grams = 101.96 g
1 mole of Al₂O₃ = 101.96 g
5 mol Al₂O₃ x (101.96 g Al₂O₃/1 mol Al₂O₃) = 509.8 g Al₂O₃
Note that moles of Al₂O₃ cancel and you are left with grams, which is what you want.
If 8.2 moles of Mg are burned, how many moles of O2 are consumed?
If 8.2 moles of Mg are burned, the number of moles of O₂ consumed is 4.1 moles.
How to calculate moles using stoichiometry?Stoichiometry refers to the quantitative relationship between the reactants and products of a specific reaction or equation.
According to this question, magnesium reacts with oxygen to produce magnesium oxide as follows:
2Mg + O₂ → 2MgO
Based on the above equation, 2 moles of magnesium reacts with 1 mole of oxygen gas
This means that 8.2 moles of magnesium will react with 8.2 × ½ = 4.1 moles of oxygen gas.
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Here is a list of synonyms for the two meanings of the word initiate. Think about what each word
means and decide where it belongs in the graphic organizer below.
admit
begin
commence
create
pledge
recruit
launch
welcome
► Now write these synonyms for initiate under the correct definition in the graphic organizer.
1. To put into effect; to bring into use.
2. To take in as a member.
Answer:
"Initiate"
1. To put into effect; bring into use.
• begin
• commence
• create
• launch
2. To take in as a member.
• admit
• pledge
• recruit
• welcome
What is the density of 10.002 g of water at 20°C in the units of g/mL?
Answer:
the density of 10.002 g of water at 20°C in the units of g/mL is 0.998 g/mL
Explanation:
Density of 10.002g of water at 20°C in g/mL = 0.998 g/mL
Given that:
density of water at 20°C = 0.9982 g/mL
Density = mass / volume ---- ( 1 )
Where : mass = 10.002 g
Volume = ?
Density = 0.9982 g/mL
∴ Volume = 10.002 / 0.9982 = 10.02 mL
back to equation ( 1 )
Density = 10.002 / 10.02 = 0.9982 g/mL ≈ 0.998 g/mL
What is this called?
Answer:
2, 5 -dimethylheptane
Explanation:
Drawing the full structure would help you understand better
Write a scientific explanation that describes if we should use synthetic materials or only natural materials.
please help by the end of the night
We should be using natural materials because they are safer for our environment.
Why natural materials are preferableClaims: We should be using natural materials as opposed to synthetic materials. This is because natural materials are organic and 100% biodegradable. Synthetic materials, on the other hand, are not all naturally biodegradable. Many of them persist in the environment and hurt the environment and living organisms in the process.
Evidence: Most nylons and plastics are good examples of synthetic materials. Both are not biodegradable and persist in the environment. Our oceans are filled with nondegradable plastics. This plastic pollution is a threat to water transportation, aquatic biodiversity and food sustainability of humans.
Reasoning: Most synthetic materials affect the environment and we humans as compared to natural materials who are easily removed from the environment. Thus, our preference should be natural materials.
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How to name ions from radicals
To name ions from radicals, first identify the charge of the ion by counting the number of protons and electrons.
What do you mean ions?
Ions are atoms or molecules that have gained or lost one or more electrons and thus have a net electric charge. They are formed when an atom gains or loses electrons in a chemical reaction. Examples of common ions include sodium (Na+), chloride (Cl-), calcium (Ca2+), and magnesium (Mg2+).
Then determine the name of the ion based on its charge. For example, if the ion has a positive charge, it is called a cation; if it has a negative charge, it is called an anion. Finally, name the ion using the element's name and its charge. For example, a radical with two protons and one electron would be a cation and would be named “Hydrogen ion”.
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1. The liquid solvent has a mass of 24.5 g
and a density of 0.865 g/mL.
Determine the mass of the solid given its density is 2.50 g/mL.
2. Convert 579
cm/s to units of meters per minute. Show the unit analysis by dragging the conversion factors into the unit‑factor slots.
3. A liquid solvent is added to a flask containing an insoluble solid. The total volume of the solid and liquid together is 93.0 mL.
The liquid solvent has a mass of 24.5 g
and a density of 0.865 g/mL.
Determine the mass of the solid given its density is 2.50 g/mL.
4. Charlotte is driving at 61.4 mi/h
and receives a text message. She looks down at her phone and takes her eyes off the road for 4.16 s.
How far has Charlotte traveled in feet during this time?
5. A 13.01 g
sample of NaBr
contains 22.34% Na
by mass. How many grams of sodium does a 8.65 g
sample of sodium bromide contain?
Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. Therefore, the volume of solid is 9.8L.
What is density?Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.
Mathematically,
Density of solid = Mass of solid ÷volume marked on the graduated cylinder
mass of solid =24.5 g
density of solid =2.50 g/mL
substituting all the given values in the above equation, we get
2.50 g/mL= 24.5 g/ volume of solid
volume of solid= 9.8L
Therefore, the volume of solid is 9.8L.
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Solution A has a pH of 10 and solution B has a pH of 6. Solution A has _____ times less hydrogen ion compared with solution B.
Answer:
_4
Explanation:
according to how the ph scale is arranged ,you will notice that when tou move from ph 10 to ph 6 the form changes to negative and it will give the answer as _4
Which statement about the population shown in this graph is true?
There is nothing controlling population growth.
The population is not continuing to grow because it has reached its carrying capacity.
The number of individuals will continue to increase rapidly.
The number of individuals will decrease until there are none left.
The correct statement about the population shown in this graph is
The population is not continuing to grow because it has reached its carrying capacity.
What is population?Population typically refers to the number of people in a single area, whether it be a city or town, region, country, continent, or the world.
The carrying capacity of an environment is described as the maximum population size of a biological species that can be sustained by that specific environment, given the food, habitat, water, and other resources available.
The purpose of Carrying capacity is that it is a concept for biologists when trying to better understand biological populations and the factors that affect them.
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For a diffraction grating with 1600 blazes/mm, what wavelength would you get for an angle of incidence of 30 degrees and reflection angle of 7 degrees? Assume first order diffraction.
The wavelength you get for an angle of incidence of 30 degrees and reflection angle of 7 degrees is
2.3633166* 10^{-4}mm
What is wavelength?Generally, To calculate the wavelength, you would need to use the equation for diffraction grating:
mλ = d(sin θi - sin θr)
Where
m is the order of diffraction (in this case, first order, so m=1), λ is the wavelength, d is the distance between the grating lines (in this case, 1600 lines/mm), θi is the angle of incidence, and 'θr is the angle of reflection.Plugging in the given values:
1λ = (1/1600 mm)(sin 30° - sin 7°)
Solving for λ:
λ = (1/1600 mm)(sin 30° - sin 7°)
λ = 2.3633166* 10^{-4}mm
This equation gives you the wavelength in the first-order diffraction
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Please help me with this question (Chemistry -- Stoichiometry)
The mass in grams of water that are produced when 80. g of NaOH react with 73 g of HCl to form 117 g of NaCl and water is 36.0 g.
What is the equation of the reactions of sodium hydroxide and hydrochloric acid?The equation of the reactions of sodium hydroxide and hydrochloric acid is given below:
NaOH + HCl ---> NaCl + H₂O
The mole ratio is 1 : 1 : 1 : 1
Moles of NaOH that reacted = 80/40
Moles of NaOH that reacted = 2 moles
Moles of HCl that reacted = 73/36.5
Moles of HCl that reacted = 2 moles
Moles of water produced will be 2 moles
Mass of water = 2 * 18 g/mol
Mass of water produced = 36.0 grams.
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At what temperature does Benzene boil when the external pressure is 440 torr
The boiling point of benzene when the external pressure is 440 torr is 80.1 °C (176.2 °F).
What is benzene?
Benzene is an organic compound composed of six carbon atoms in a ring structure, with one hydrogen atom attached to each carbon atom. It is a highly flammable, colorless liquid with a sweet smell. Benzene is a natural component of crude oil and is one of the most important organic chemicals used in industry. It is used in the production of plastics, resins, synthetic fibers, rubber, pesticides, detergents, drugs, and dyes. It is also used as a solvent for fats, oils, waxes, resins, and inks. Benzene is classified as a carcinogen and its exposure can cause a variety of adverse health effects, including acute myelogenous leukemia, lymphomas, and other forms of cancer.
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An atom has a diameter of 3.50 Å and the nucleus of that atom has a diameter of 6.50×10−5 Å . Determine the fraction of the volume of the atom that is taken up by the nucleus. Assume the atom and the nucleus are a sphere.
fraction of atomic volume:
1.43236148
×10
−14
Calculate the density of a proton, given that the mass of a proton is 1.0073 amu and the diameter of a proton is 1.73×10−15 m .
density:
g/cm 3
A proton's density is equal to 3.962 E14 g/cm3, given that it has a mass of 1.0073 amu and a diameter of 1.73 1015 m.
What do protons go by?Although protons were once thought to be elementary particles, the Standard Model of particle physics now recognises them as composite particles that comprise three valence quarks. Protons and neutrons are collectively referred to as hadrons.
Proton mass = 1.0073 amu, amu = 1.66054 E-24 g, and g proton = (1.0073 amu)(1.06654 E-24 g/amu = 1.074 E-24 g.
V = 4/3πr³\s∴ For example, r = D/2 ≈ 1.73 E-15 m)/2 = 8.65 E-16 m, where V = (4/3) (8.65 E-16 m) 3 = (1.074 E-24 g)/(2.711 E-39 cm3) = 3.962 E14 g/cm3
What is an example of a proton?Protons include the H+ ion or the hydrogen atom's nucleus. Regardless of the isotope, each hydrogen atom has one proton, each helium atom has two, each lithium atom has three, and so on.
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What is the formula for photosynthesis and cellular ?
Answer:
Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O.
Photosynthesis: 6CO2 + 6H2O → C6H12O6+ 6O.
Explanation:
:)
Calculate to the correct number of significant figure (1.7x10^6)/(2.63x10^2) + 7.33 =
Answer: 64.7 [tex]*10^2[/tex]
Explanation:
Significant figures are the number of digits in a value that correlate with the accuracy of that value.
First lets solve the equation:
(1.7x10^6)/(2.63x10^2) + 7.33 = ?
(1,700,000)/(263) + 7.33
(6,463.8783) + 7.33 = 6,471.2083
We have to simplify the answer to the correct amount of significant digits.
6,471.2083 -> 64.7 [tex]*10^2[/tex]
What volume of O2 at 988 mmHg and 37 degrees C is required to synthesize 19.5
of NO?
Explanation:
The volume of O2 at 988 is 0.1634°C
Order from Weakest attraction to strongest attraction
YC13
SrCl2
RbCl
Order from the weakest attraction to the strongest attraction is SrCl₂ > RbCl > YCl₃.
Which type of attraction is the weakest ?The London dispersion forces are the least powerful intermolecular forces. London's dispersion forces are also referred to as induced-dipole-induced-dipole because they are transiently attractive forces that cause temporary dipoles to form.
The non-polar, monatomic gas exhibits London dispersion.Ionic bonds > Hydrogen bonding > Van der Waals dipole-dipole interactions > Van der Waals dispersion forces.
The attraction of hydrogen bond is strongest, because they have permanent dipole-dipole forces, Van der Waal's forces is the weakest bond of attraction.
Thus, the order from the weakest attraction to the strongest attraction is SrCl₂ > RbCl > YCl₃.
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If you fill your car tire to a pressure of 33 psi (pounds per square inch) on a hot summer day when the temperature is 35 ∘C (95 ∘F ), what is the pressure (in psi ) on a cold winter day when the temperature is − 17 ∘C (1 ∘F )? Assume no gas leaks out between measurements and the volume of the tire does not change.
The pressure on a cold winter day would be 16.03 psi.
Pressure lawThe pressure law state that the pressure of a gas at constant volume is directly proportional to its temperature. This law can be mathematically expressed as follows:
[tex]P_1/T_1 = P_2/T_2[/tex]
Where [tex]P_1[/tex] = initial pressure of the gas, [tex]T_1[/tex] = initial temperature, [tex]P_2[/tex] = final pressure, and [tex]T_2[/tex] = final temperature.
In this case, [tex]P_1[/tex] = 33 psi, [tex]T_1[/tex] = 35 [tex]^oC[/tex] and [tex]T_2[/tex] = -17 [tex]^oC[/tex]. What we are looking for is [tex]P_2[/tex].
[tex]P_2[/tex] = [tex]P_1.T_2/T_1[/tex]
= 33 x -17/35
= 16.03 psi
In other words, at constant volume and without leakage, the pressure in the tire on a cold winter day when the temperature is -17 [tex]^oC[/tex] would be 16.03 psi.
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Can anyone help me on balancing equations?
Answer:In (a). 1st blank will be 1
2nd blank will be 4
3rd blank will be 3
(b).1-1
2-3
3-1
4-2
(c).1-1
2-12
3-12
4-11
(d).1-2
2-3
3-2
4-4
Explanation:
What causes pressure inside a bicycle tire?
A. The air particles pushing on the tire as they expand
B. The collisions of the air particles with one another
C. The collisions of the air particles with the surface of the tire
D. The air particles vibrating near the surface of the tire
Answer:
A. The air particles pushing on the tire as they expand
Explanation:
Answer: A is the right answer
Explanation:
The air pressure inside a bicycle tire is caused by the weight of the air molecules pressing down on the surface of the tire. This is why you can sometimes hear a hissing sound when you first get a flat tire – it’s because the air is escaping from the tire and equalizing the pressure inside and outside of the tire.
What is the thermal energy needed to completely vaporize 18.02 g of water at 100 degrees celsius?
The heat that we are going to need so as to be able to vaporize the water is 40.4 kJ.
What is the thermal energy?We know that the term thermal energy has to do with the energy that can be supplied to the water as heat when we raise the temperature of the water. In this case, we can see that we are dealing with the thermal energy needed to completely vaporize 18.02 g of water at 100 degrees Celsius.
We know that the heat that is required can be obtained from the formula;
H = mL
m= mass of the water
L = latent heat of vaporization of water
H = 18.02 g * 2240 J/g
H = 40.4 kJ
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