Answer:
1.6 M.
Explanation:
We want to find the molarity of a solution that contains 114.4 g NaCl in a 1.2 L solution.
Recall that molarity is given by:
[tex]\displaystyle \text{M} = \frac{\text{ mols solute}}{\text{ L soln.}}[/tex]
Convert 114.4 g NaCl to mol NaCl using its molecular weight:
[tex]\displaystyle 114.4 \text{ g NaCl} \cdot \frac{1 \text{ mol NaCl}}{58.44 \text{ g NaCl}} = 1.958\text{ mol NaCl}[/tex]
Therefore, the molarity of the solution will be:
[tex]\displaystyle \text{M} = \frac{1.958 \text{ mol NaCl}}{1.2\text{ L soln.}} = 1.6 \text{ M}[/tex]
In conclusion, the molarity of the solution is 1.6 M.
There are 6.02 x 10 ^ 23 atoms of carbon per 12 grams. How many atoms of carbon per pound are there?
Considering the change of units, there are 2.27×10²⁵ atoms of carbon per pound.
You know that there are 6.02x 10²³ atoms of carbon per 12 grams.
On the other hand, you must make a change of units. For that you must know that 1 gram equals 0.00220462 pounds. Then you can apply the following rule of three: if 1 gram is equal to 0.00220462 pounds, 12 grams is equal to how many pounds?
[tex]mass=\frac{12 gramsx0.00220462 pounds}{1 gram}[/tex]
mass= 0.0264555 pounds
12 grams equals 0.0264555 pounds. So if 12 grams contains 6.02x 10²³ atoms, 0.0264555 pounds contains that many moles. Then you can apply the following rule of three: if 0.0264555 pounds contains 6.02x 10²³ atoms, does 1 pound contain how many atoms?
[tex]amount of atoms=\frac{1 poundx6.02x10^{23} atoms}{0.0264555 pounds}[/tex]
amount of atoms= 2.27×10²⁵ atoms
Finally, there are 2.27×10²⁵ atoms of carbon per pound.
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https://brainly.com/question/17353696?referrer=searchResults What structure
do plant cells have during
cytokinesis that animal cells
do not have?
Answer: See Explanation
Explanation:
Cytokinesis occurs in mitosis and meiosis for both plant and animal cells. The ultimate objective is to divide the parent cell into daughter cells.
In plants , this occurs when a cell wall forms in between the daughter cells.
In animals , this occurs when a cleavage furrow forms. This pinches the cell in half.
help please thank you!!!!
Answer:
I think the coefficient is 4
In the Periodic Table, which of the highlighted elements has the greatest number of protons?
A Fluorine, F
B Iron, Fe
C Calcium, Ca
D Aluminum, AI
Answer:
since the modern periodic table is made in ascending order by the atomic number fluorine has the most protons.
The highlighted element that has the greatest number of protons is Iron, Fe. Thus, the correct option for this question is B.
What do you mean by Protons?Protons may be defined as a type of subatomic particles which are generally present in the centermost part of an atom known as the nucleus along with neutrons. These subatomic particles are positively charged in nature. Ernest Rutherford was known to discover these particles.
According to the question, the number of protons is generally governed by an atomic number of a chemical element. For example, fluorine has an atomic number of 9. It has the same number of protons in its nucleus. The number of protons in Iron is 26, while the number of protons in Calcium is 20. And the number of protons in aluminum is 13.
Therefore, an iron is the highlighted element that has the greatest number of protons. Thus, the correct option for this question is B.
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Which option correctly shows the concentration of H3O+ ions in pure water?
7 mol/L
1.0 × 10-7 mol/L
1.0 x 10-14 mol/L
14 mol/L
Answer:
C 1.0 x 10-14 mol/L
Explanation:
also do you do connections academy?
Which of the following is an opening on the surface of a planet or moon that allows material warmer than its surroundings to escape from its interior?
Question 10 options:
Tsunami
Volcano
Tornado
Earthquake
A volcano can be defined as an opening on the surface of a planet that allows material warmer than surroundings to escape from its interior. Therefore, option (B) is correct.
What is volcano?A volcano can be described as an opening in the earth's crust through which lava, volcanic ash, and gases escape from its interior. When this material escapes, then eruptions can be calmer, with gentle flows of material, or can be explosive, sending material high into the sky.
When pieces of Earth's crust slowly move away from each other, magma can rise. The magma rises to fill in space and underwater volcanoes can form.
The tectonic plates can also move toward each other when magma rises. The part of Earth's crust can be forced deep into its interior which can cause the crust to melt and rise as magma.
The magma can also rise over hot spots. Hot spots can be defined as the hot areas inside of Earth where magma heats up and becomes less dense. With each way of rising the magma can form volcanoes.
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what would be the best way to determine the amount of AgNO3 in the dissolved solution? Justify your answer
The best way to determine the concentration of AgNO3 dissolved in solution is by precipitation using a chloride.
Precipitation is one of the oldest and handy methods of chemical analysis. It involves the addition of a reagent which is known to form a precipitate with the test solution.
The precipitate is now recovered from solution, dried and weighed. Stoichiometric calculations show the amount of the test substance dissolved in the test solution.
In this case, NaCl can be used to carry out a precipitation as follows;
AgNO3(aq) + NaCl(aq) -------> AgCl(s) + NaNO3(aq)
The AgCl precipitate is recovered dried and weighed and then the amount of AgNO3 in the dissolved solution is determined.
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answer 3 questions. screenshot
calculate the volume of the gas in the balloon using the equation for volume of a sphere
Answer:
We can just use the formula for the volume of sphere which is 4/3 PI R cubed R is the radius. So if you have a balloon that's a sphere.
Explanation:
How to write the molecular equation of the following reaction. Also, identify the net ionic equation, the total ionic ecuation and the species that gets reduced and oxidized.
NaHCO3(ac) + HCl(ac)
Answer:
a. HCl + KOH
b. HCHO₂ + LiOH
Only the first H in HCHO₂ is acidic
c. N₂H₄ + HCl
Both N atoms in N₂H₄ are basic, so the compound reacts with 2 mol of HCl.
Explanation:
When titrating a NaF(aq) solution with HCl(aq), the equivalence point will occur at a pH value ______ .
a) above 7 because it is determined by NaF(aq)
b) below 7 because HCl(aq) is a strong acid
c) below 7 because it is determined by HF(aq)
d) at 7 because it is determined by H2O(l)
At the equivalence point, the NaF completely reacts with the HCl
The correct option that gives the equivalence point when titrating NaF solution with HCl(aq), occur at a pH value is option c);
c) Below 7 because it is determined by HF (aq)
Reason:
The ionic equation of the reaction taking place in the titration is presented as follows;
NaF + HCl → HF + NaClNa⁺ (aq) + F⁻ (aq) + H⁺ (aq) + Cl⁻(aq) → HF (aq)+ Na⁺(aq) + Cl⁻(aq)Therefore, by removing the spectator ions, we get;
F⁻(aq) + H⁺(aq) → HF(aq)Therefore;
The net ionic equation is the formation of hydrofluoric acid, HF, which is a
weak acid, therefore, the pH value will be below 7 because it is determined
by HF
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Which of the following are uses for radiation? Check all that apply.
O A. Food preservation
B. Energy production
C. Medical applications
D. Dating artifacts
(I have a feeling it’s b and c but I want to double check )
Answer:
b and c
Explanation:
b nuclear energy and d is radiology dating if I am correct
The pKa of formic acid is 3.75. At pH of 5.00, _______ .
a) [formate] < [formic acid]
b) [formate] > [formic acid]
c) Insufficient information to be determined.
d) [formate] = [formic acid]
The pKa of formic acid is 3.75. At pH of 5.00, b) [formate] > [formic acid].
Formic acid is a weak acid. Thus, together with its conjugate base (formate) they form a buffer system. We can calculate the pH of a buffer system using Henderson-Hasselbach's equation.
[tex]pH = pKa + log \frac{[formate]}{[formic\ acid]} \\\\5.00 = 3.75 + log \frac{[formate]}{[formic\ acid]}\\\\\frac{[formate]}{[formic\ acid]} = 17.8[/tex]
As expected, at a pH above the pKa, the concentration of formate is higher than that of the formic acid.
The pKa of formic acid is 3.75. At pH of 5.00, b) [formate] > [formic acid].
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Explain how a density current might form in the Arctic Ocean
they are caused by winds and changes in seawater density.
How many grams of O are in 705 g of N2O ?
mass:
g
Answer:
O are in 535 g of N2O
Explanation:
Which part of the pencil is conductors?
A. The metal and point
B. The eraser and point
C. The wood and eraser
D. the wood and metal
Answer:
A. The metal and point
Explanation:
Elements that can conduct electric current are generally metals. However, the nonmetal carbon in the form of graphite is a good conductor of electricity.
31. Why would a valence electron be easier to steal from a Francium atom than a Fluorine
atom? Give two reasons.
1.
2
Answer:
1. Because a Francium atom is deeper down the alkali metals, it is much easier to lose a valence electron.
2. A fluorine atom can easily gain a valence electron, but it could not easily lose a valence electron because it is one electron away from filling the outer shell
Explanation:
The answer is the explanation
can you describe a carbon atoms for me please
thank you
what if two objects have the same mass but different sizes which is denser? expain
Answer:
Imagine you have 5 marbles in your hand and 5 marbles spread in front of you on the floor. Each group has the same mass, but one is contained in a smaller space. The marbles in your hand would be denser because there is more "stuff" in a smaller space.
Explanation:
C.5A What atom is shown below? *
8 points
19 p
20 n
Cholrine
Argon
Calcium
Potassium
Answer:
p stands for protons. You can identify the element by matching the atomic number with the number of protons.
The answer is Potassium in this case.
What evidence supports the theory of continental drift? Select three.
Question 10 options:
Fossils of plants and animals
Distinctive rock layers and mountain ranges
Glacial scratches on rocks
Volcanic activity along the Ring of Fire
Answer:
fossils of plants and animals
distinctive rock layers and mountain ranges
Glacial scratches on rocks
Explanation: I took the quiz lol
Atomic Theory questions. Will be worth 50 points.
Answer:
1. Option C
2. Option D
3. Option B
4. Option
5. Option
6. Option
7. Option
Consider the following reactions:
3 Ni 2+(aq) + 2Cr(OH)3 (s) + 10 OH –(aq) → 3 Ni (s) + 2 CrO4 –2 (aq) + 8 H2O (l)
A) What is the value for n for this reactions?
B) Calculate the standard Gibbs Free-Energy
C) How long does it take a current of 5 A to deposit 95 g of nickel?
For the reaction
3 Ni2+(aq) + 2 Cr(OH)3(s) + 10 OH- (aq) → 3 Ni(s) + 2 CrO42-(aq) + 8 H2O(l) G = +87 kJ/mol
Given:
(Ni2+(aq) + 2 e- → Ni(s)) x 3 Ered = -0.28 V
(CrO42-(aq) + 4 H2O(l) + 3 e- → Cr(OH)3(s) + 5 OH-(aq)) x 2
_____________________________________________________________________________________
3 Ni2+(aq) + 6 e- → 3 Ni(s)
2 CrO42-(aq) + 8 H2O(l) + 6 e- → 2 Cr(OH)3(s) + 10 OH-(aq)
please someone help me Balance this equation.
K2CrO7 + H2SO4 + 2C2H5OH = 3CH3COOH + 2K2SO4 + 4H2O + 2Cr2(SO4)3.
Answer: This is an oxidation-reduction (redox) reaction:
3 C-II - 12 e- → 3 CII (oxidation)
4 CrVI + 12 e- → 4 CrIII (reduction)
C2H5OH is a reducing agent, K2Cr2O7 is an oxidizing agent.
2. Calculate the number of moles of NaOH needed to make 300 mL of 6 M solution?
Answer:
1.8 mol
Explanation:
concentration (M) = no. of moles (mol) ÷ volume (dm³)
no. of moles = concentration × volume
= 6 × 300 / 1000
= 1.8 mol
What state of matter is foam?
Answer:
Foam is not a state of matter, it is a mixture of two states: gas and (usually) liquid. There are also gas-solid foams.Explanation:
Answer:
Foam is not a state of matter, it is a mixture of two states: gas and (usually) liquid.
Explanation:
Answer question based on the periodic table entry for bromine.
How many protons does bromine have?
a. 35
b. 36
c. 45
d. 80
What benefits does the food industry gets from catalysts?
can u help me with this i confused with this
Answer:
your creating a animal/creature
Explanation:
a human is a mammal we grow use energy reproduce and change our clothes to respond to our surroundings
Under what circumstances may a health insurer charge a higher premium to a woman with a genetic disposition to breast cancer? a) Her mother has breast cancer but she doesn't. O b) She has breast cancer. c) Her sister has breast cancer but she doesn't. d) Health insurers can never discriminate based on genetic information in this way.
Answer:
D
Explanation:
No company is allowed to discriminate.