The molarity of the diluted standard solution is obtained by calculation to be 0.015 M.
Recall the dilution formula;
C1V1 = C2V2
C1 = Initial concentration = 0.1140 M
V1 = initial volume = 6.50mL
C2 = Final concentration = ?
V2 = Final volume = 50.0mL
Making C2 the subject of the formula and substituting values;
C2 = C1V1/V2
C2 = 0.1140 M × 6.50mL/50.0mL
C2 = 0.015 M
Learn more: https://brainly.com/question/6284546
what mass does a nuetron have?
Answer:
1 AMU
Explanation:
Protons, neutrons, and electrons: Both protons and neutrons have a mass of 1 amu and are found in the nucleus.
What is the percent of O in
CO2?
(C = 12.01 amu, O = 16.00 amu)
[? ]%
Answer:
show me a pic?? then I'll lyk
Help. 50 points. Need honest answers.
Answer:
ok
Explanation:
How many atoms are in 2 moles of oxygen?
Answer:
6.02 × 1,023
Explanation:
One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1,023 molecules of oxygen but 12.04 X 1,023 (2 X 6.02 X 1,023) atoms, because each molecule of oxygen contains two oxygen atoms.
What is freshly pumped oil called?
Answer:
When the drill hits oil, some of the oil rises from the ground high into the air. This immediate release of oil is known as a "gusher." Once a reservoir has been located, pumps are used to extract the oil.
What is freshly pumped oil called?
petroleum
Explanation:
Sodium carbonate (Na2CO3) reacts with acetic acid (CH3COOH) to form sodium acetate (NaCH3COO), carbon dioxide (CO2), and water (H2O). A chemist carries out this reaction in a bomb calorimeter. The reaction causes the temperature of a bomb calorimeter to decrease by 0. 985 K. The calorimeter has a mass of 1. 500 kg and a specific heat of 2. 52 J/g•K. What is the heat of reaction for this system? kJ.
Explanation:
Mass of bomb calorimeter, m = 1.5 kg = 1500 g
Temperature change of calorimeter, ΔT = - 0.985 K
Specific heat of calorimeter, c = 2.52 J/g K
To Find:
The heat of reaction for this system
Calculation:
The heat of reaction can be calculated by the given formula:
Q = mcΔT
⇒ Q = 1500 × 2.52 × (- 0.985)
⇒ Q = - 3723.3 J (-ve sign shows heat is given by calorimeter)
- So the heat of reaction is -3723.3 J or -3.7233 kJ
Taking into account the definition of calorimetry, the heat of reaction for the system is -3,723.3 J or -3.7233 kJ.
In first place, calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
In this way, between heat and temperature there is a direct proportional relationship.
The constant of proportionality depends on the substance that constitutes the body and its mass, and is the product of the specific heat by the mass of the body.
So, the equation that allows to calculate heat exchanges is:
Q = c× m× ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case, you know:
Q= ? c= 2.52 [tex]\frac{J}{gK}[/tex] m= 1.500 Kg= 1500 g ΔT= -0.985 K is negative because the temperature decreases.Replacing in the expression to calculate heat exchanges:
Q= 2.52[tex]\frac{J}{gK}[/tex]× 1500 g× (-0.985 K)
Solving:
Q= -3,723.3 J= -3.7233 kJ
Negative sign shows heat is given by calorimeter.
In summary, the heat of reaction for the system is -3,723.3 J or -3.7233 kJ.
Learn more abour calorimetry:
brainly.com/question/11586486?referrer=searchResults brainly.com/question/24724338?referrer=searchResults4. Initially, 1 mol of oxygen (assumed to be an ideal gas) has temperature 310 K and volume 12 L. We will allow it to expand to volume 19 L. (a) What would be the final temperature if the gas expands adiabatically
Answer:
490.83 oK
Explanation:
First of all, we better agree on the meaning of the word adiabatically. It means without the loss or gain of heat. So nothing is given up to or taken from the environment.
This also assumes that no change has occurred in the pressure.
T1 = 310 oK
T2 = ?
V1 = 12 L
V2 = 19 L
T1/V1 = T2/V2
310 / 12 = x/19 Multiply both sides by 19
310*19 / 12 = T2 Multiply 310 * 19 on the left.
5890 / 12 = T2 Divide by 12
490.83 = T2
Research the future of energy production. What improvements to (or new methods of) electrical energy production are scientists currently developing? How will they improve on present methods of energy production (what makes these new methods better than the old)? What are the cons of these improvements?
Answer:
Fossil fuels like coal, oil and natural gas supply 80 percent of the world’s energy to warm homes, charge devices and power transportation. They are also the primary human source of greenhouse gas emissions. Stanford scientists broadly agree that curtailing our use of fossil fuels would have significant benefits like improving health and reducing the number and severity of natural disasters, but it’s not yet clear what can replace them.
Explanation:
4. When a turbine spins, it generates electrical energy and that is where it gets its name from.
application of electroplating
Answer:
are you interested in tun
1. Explain the difference between genetic, environmental, social, and pathogenic factors.
2. How do pathogens spread?
3. How can we, as humans, prevent transmission of pathogens?
4. List three ways the environment can affect personal health.
1. Genetic factors are those where the genetic condition of an individual is capable of increasing the probability of developing certain diseases.
Environmental factors include the diversity of environmental stresses such as population density, temperature, food and pollutants that impact human health.
Social factors are related to the interaction of groups through culture, social class and family structure, which also have an effect on population health.
Pathogenic factors, on the other hand, are those transmitted by agents such as viruses, fungi, bacteria and protozoa, which colonize a host by adhering to cells and evading immunity, generating diseases.
2. The transmission of pathogens can occur in several ways, such as contact with bodily fluids from infected people, cross-transmission or through being spread through particles in the air.
3. We can prevent the transmission of pathogens through proper hygiene habits, healthy eating, vaccination against infectious diseases and avoid contact with other people if you have a communicable disease.
4. The environment can affect personal health through climate change, pollution and lack of infrastructure that lead to less access to quality food and basic health conditions.
Learn more here:
https://brainly.com/question/13179079
Calcolate resulant force 15N <-[]->20N
Explanation:
5N right because -15N for left plus +20N for right = +5N
Element of group 2 loses two electrons in the process of a chemical combustion. what is the ionic charge? +2 or -2
What is the molarity when 500mL H2O is added to 20mL 6.0M HNO3?
Answer:
50.00-mL volumetric flask and diluted to the mark with water. What is the molarity of the new solution? 12. 30.00 mL of water is added to 20.00 mL of 0.0500
Explanation:
Hope This helps
Have a great day
~Zero
what is waves is energy passing through the medium of water? true or false
i have no idea what you said but for the sake of god its true
A sealed flask initially contains pure nitrogen dioxide gas (NO,). Over time, the nitrogen dioxide forms dinitrogen tetroxide gas (N,O.). The graph below shows the relative amounts of (NO,) and (N20.) over time. What is true about the time indicated by the blue arrow?
This problem is providing information about the equilibrium reaction whereby nitrogen dioxide gas produced dinitrogen tetroxide gas as shown on the attached picture and the following chemical equation:
NO₂ (g) ⇄ N₂O₄ (g)
In such a way, we can consider the given choices to reason the following: the blue arrow is pointing out the arrival to the equilibrium condition for the reaction, a point in which the rate of the forward reaction (formation of N₂O₄) is equal to the rate of the reverse reaction (formation of NO₂), because the molecules will fluctuate to the same relative amounts defined by the equilibrium constant.
Therefore the answer will be the first one on the attached file, which can vary on your online homework format.
It is important to note that the reactant is not used up at any point of the graph (concentration drops to 0) and also, the activation energy cannot be analyzed with this sparse information.
Learn more:
(equilibrium concentrations) https://brainly.com/question/7949757What is leukemia?
A. Cancer that affects the blood
B. Prostate cancer
C. Breast cancer
D. Lung cancer
Answer:
A: Cancer that affects the blood
information: Leukemia is a cancer of the early blood-forming cells. Most often, leukemia is a cancer of the white blood cells, but some leukemias start in other blood cell types.
Zn + Fe2O3 --> Fe + ZnO
If excess Zn reacts with 1.34g Fe2O3 in the reaction above, how many grams of Fe would you expect to be produced
The mass of Fe produced from the reaction is 0.938 g.
We'll begin by calculating the mass of Fe2O3 that reacted and the mass of Fe produced from the balanced equation.
3Zn + Fe₂O₃ —> 2Fe + 3ZnO
Molar mass of Fe₂O₃ = (56×2) + (16×3) = 160 g/mol
Mass of Fe₂O₃ from the balanced equation = 1 × 160 = 160 g
Molar mass of Fe = 56 g/mol
Mass of Fe from the balanced equation = 2 × 56 = 112 g
From the balanced equation above,
160 g of Fe₂O₃ reacted to produce 112 g of Fe.
Finally, we shall determine the mass of the Fe produced by 1.34 g of Fe₂O₃
From the balanced equation above,
160 g of Fe₂O₃ reacted to produce 112 g of Fe
Therefore,
1.34 g of Fe₂O₃ will react to produce = (1.34 × 112)/160 = 0.938 g of Fe
Thus, 0.938 g of Fe was produced from the reaction.
Learn more about stiochoimetry: https://brainly.com/question/16727444
Which of the following is a binary compound?
what makes matter change from one state to another?
Answer: Adding or removing energy from matter
Explanation:
what is the number of protons in a neutral atom with 31 electrons and 38 neutrons?
31
I think. Protons and electrons share the same number as well as the atomic number.
Answer:
31 protons
Explanation:
Protons are positively charged and electrons are negatively charged so if it is a neutrally charged atom (which most are) the protons and electrons will be equal.
why is xenon monatomic but bromine is diatomic
giving brainly if correct and explained
Answer:
D.
Explanation:
A concentrated solution is one that has a lot of solute (the substance being dissolved) in the solvent (the substance doing the dissolving). When a solution is concentrated, it means it has a high ratio of solute to solvent, so the answer is D.
Hope this helps.
pls answer this it's due today
Answer:
That's pretty easy,if you have a grasp of Elements, Compounds and their Symbols ans Molecular formula.
So, Let's get started!
Our reactions are as follows:
Sodium(Na) + Chlorine(Cl) ---> Sodium chloride(NaCl)Think of a compound that has both Sodium and Chlorine and is very common.
Common salt — Sodium chloride!
Yeah, that's it! It has both Sodium and Chlorine in it's molecular formula. (NaCl)
Magnesium(Mg) + Oxygen(O2) ---> Magnesium oxide(MgO)Now, we have to, somehow, get Magnesium oxide using Oxygen. The best way is: by reacting Magnesium with Oxygen.
Iron(Fe) + Sulfur(S) ---> Iron Sulfide(FeS)Now, we have to get two reactants that react to form Iron Sulfide.
FeS contains only two elements in its formula and that are: Iron(Fe) and Sulfur(S).
So, the best way would be to react Iron(Fe) and Sulfur(S) and get Iron Sulfide (FeS)
Hydrogen(H2) + Oxygen(O2) ---> water(H2O)You must know that water is H2O, that is, a compound of Hydrogen and Oxygen, the easiest way to get H2O as your product would be : by reacting Oxygen and Hydrogen.
I need help, plz help me with this problem
Answer:
It's b
Explanation:
I had the same exact question
calculate the molarity of a 50.0 ml of a 0.150 m hcl solution when 30.0 ml of water is added.
Answer:
0.09375 M
Explanation:
You want to use the following equation:
M1*V1=M2*V2
Then plug in the 50ml to V1 and 0.15M to M1 and 80ml to V2 (add the 50 and 30). The next thing you want to do is change the mL to liters, since Molarity is moles/liter. Once that is done, solve algebraically for answer.
** Also don't forget to capitalize the M when you mean Molarity, because it is different than m.**
Hope this helps!
1. How many covalent bonds can nitrogen form?
2. Which of the following represents a covalent compound?
A. O2
B. CO2
C. Cl2
D. NaCl
3. 2. Nitrogen is a diatomic element with five valence electrons. Create a model of a molecule of nitrogen.
Answer:
1. 3 covalent bonds
2. CO2
Nitrogen can form three covalent bonds and carbon dioxide represents a covalent compound.Molecule of nitrogen is attached in image below.
What is a covalent bond?Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.
Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.
Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.
Learn more about covalent bond,here:
https://brainly.com/question/19382448
#SPJ6
it was observed that magnesium sulphate was present in tap water ,which hardness might that be
Answer:
Calcium sulphate is the right answer for this question.
It is because calcium sulphate helps to obtain the hardness in water. hardness.
The presence of this resource is a main reason for permanent hardness.
Hard drinking water has moderate health benefits, but can pose serious problems for the industrial settings.
Explanation:
which two body systems are primarily responsible for locomotion
Locomotion and movement are brought about by skeletal and muscular system of the body. It’s a coordinated event of the skeletal and muscular system brought by contraction and relaxation of muscles.
How does locomotion occur in our body?
Locomotion occurs with help of specialised muscles, muscular and non-muscular by nature.
It involves the interaction of muscles (tendons and ligaments) and skeletal joints and cartilage
Locomotion is a voluntary action which require involvement of the nervous system.
In muscles actin and myosin protein forms cross bridges, consuming ATP.
Hence, to bring about locomotion skeletal and are responsible.
Learn more about locomotion.
https://brainly.com/question/13343069
#SPJ2
URGENT PLEASE HELP
What most likely happens when a sodium atom comes near an atom having seven valence electrons?
Answer:
7 Electrons
Explanation:
What it is fill its valence shell, it would need to acquire 7 electrons - a difficult task for a metal like sodium that is a known electron-loser. So unlike fluorine and oxygen, sodium acquires a full octet by losing electrons and emptying out its outermost shell.
