1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tino4ka555 [31]
3 years ago
7

Please help with 2 chem questions thank you!

Chemistry
2 answers:
xeze [42]3 years ago
8 0
The correct answers are A and C.
andrew11 [14]3 years ago
6 0
The 1st one is A

The second one is I am 90% sure is A as well
You might be interested in
An oxide of nitrogen contains 30.45 mass % N.
N76 [4]

An oxide of nitrogen contains 30.45 mass % N, if the molar mass is 90± 5 g/mol the molecular formula is N₂O₄.

<h3>What is molar mass?</h3>

The molar mass of a chemical compound is determined by dividing its mass by the quantity of that compound, expressed as the number of moles in the sample, measured in moles. A substance's molar mass is one of its properties. The compound's molar mass is an average over numerous samples, which frequently have different masses because of isotopes.

<h3>How to find the molecular formula?</h3>

The whole-number multiple is defined as follows.

Whole-number multiple = \frac{molar mass (g/mol)}{empirical formula mass (g/mol)}

The empirical formula mass is shown below.

Mw of empirical formula = Mw of N+ 2 x (Mw of O)

                                      = 14.01 g/mol + 2 x (16.00 g/mol)

                                      = 46.01 g/mol

With the given molar mass or the molecular formula mass, we can get the whole-number multiple for the compound.

Whole-number multiple = \frac{90 g/mol }{46.01 g/mol} ≈ 2

Multiplying the subscripts of NO2 by 2, the molecular formula is N(1x2)O(2x2)= N2O4.

To learn more about molar mass visit:

brainly.com/question/12127540

#SPJ4

5 0
1 year ago
What is pH?
sergij07 [2.7K]
PH = -log[H+]
That is, pH is the negative logarithm of the hydrogen ion concentration.

pOH = -log[OH-]
pOH is the negative logarithm of the hydroxide ion concentration.

The correct answer to your question is a. The negative logarithm of the hydrogen ion concentration.
5 0
3 years ago
A carbon compound with a covalently bonded chlorine or bromine is called _____. an amide an halocarbon an alcohol an aldehyde
german
Halogens are elements that can be found in group 7 of the periodic table. They have 7 electrons in their outer shell and thus can form only a single covalent bond with other elements. Examples of halogens include chlorine, bromine and fluorine. A carbon compound that is covalently bonded with chlorine or bromine is called a halocarbon.
7 0
3 years ago
In calcium fluoride, what is the closets noble gas that each ion becomes?
alekssr [168]
Calcium fluoride: CaF₂
Ca(2+) >>> Ar (argon)
F(-) >>> Ne (neon)
4 0
2 years ago
Reproductive cells are created by _____. mitosis meiosis cytokinesis
Alex787 [66]
The correct answer is meiosis. Meiosis is a process where a cell divides into two where these cells contain half of the genetic information from the original cell. Meiosis produces daughter cells containing 50% information from the mother and 50% from the father.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Why did scientists debate the nature of electromagnetic radiation for more than 200<br> years?
    13·1 answer
  • Which quantity can vary among atoms of the same element?
    7·1 answer
  • What is the mass of 1 mole of MgSO4?
    7·1 answer
  • Which statement is TRUE
    12·2 answers
  • How many milliliters of 0.021 moles of oxalic acid is needed to react with 80 mL of 0.11 moles of KMnO4
    6·1 answer
  • Organisms with traits that are well-suited to an environment tend to survive and reproduce at a greater rate than organisms that
    8·1 answer
  • If you had 6H2 molecules and 4O2 molecules, how many H2O molecules could you produce?
    12·1 answer
  • Which deflects winds to the right or left
    5·1 answer
  • What substance and mixture have in common?
    9·1 answer
  • Explain why sodium chloride solution cannot be used as the electrolyte to produce
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!