Answer:
alkali metals is your answer
Answer:
alkali metals
Explanation:
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.
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?
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.
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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AcipHex is classified as
Answer:
Rabeprazole belongs to a class of drugs known as proton pump inhibitors (PPIs).
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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Answer question based on the periodic table entry for bromine.
How many protons does bromine have?
a. 35
b. 36
c. 45
d. 80
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
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.
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
How many grams of O are in 705 g of N2O ?
mass:
g
Answer:
O are in 535 g of N2O
Explanation:
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
How many ML of 0.44 M HCl are needed to dissolve 9.83 g of BaCO3
Answer:
nBACO3=m/M=9,83/197=0,05(mol) ->nHCl=0,05.2/1=0,1(mol) =>VHCl=n/CM=0,1/0,44=0,227(lít)
Explanation:
Explain how a density current might form in the Arctic Ocean
they are caused by winds and changes in seawater density.
What benefits does the food industry gets from catalysts?
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:
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:
white sugar and iodized salt did the resulting look same throughout?
Because White sugar settles at the bottom of iodized salt. White sugar completely mixed with iodized salt.
can you describe a carbon atoms for me please
thank you
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
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.
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.
Why has the acidity of the ocean increased over the years?
A.Sediment deposits cannot replenish quick enough in order to affect the acidity
B.Not enough basic solutions in the ocean
C. Waste from ocean life
Answer:
I think it's A
Explanation:
Carbon dioxide is added to the atmosphere whenever people burn fossil fuels. ... As the amount of carbon dioxide in the atmosphere rises, the oceans absorb a lot of it. In the ocean, carbon dioxide reacts with seawater to form carbonic acid. This causes the acidity of seawater to increase.
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)
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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help please thank you!!!!
Answer:
I think the coefficient is 4
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
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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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: