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
IrinaK [193]
3 years ago
13

Need help with cemester​

Chemistry
1 answer:
sladkih [1.3K]3 years ago
6 0

Answer:

See explanation

Explanation:

20 = B

21 = C

22 = D

23 = B

24 = B

25 = C

You might be interested in
How many molecules of Acetic Acid (CH3COOH) are in a sample that has a mass of 172.90 g?
STatiana [176]

Answer:

17.46× 10²³ molecules

Explanation:

Given data:

Mass of acetic acid = 172.90 g

Number of molecules = ?

Solution:

First of all we will calculate the number of moles of acetic acid :

Number of moles = mass / molar mass

Number of moles = 172.90 g/ 60.1 g/ol

Number of moles = 2.9 mol

Now the given problem will solve by using Avogadro number.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules

2.9 mol × 6.022 × 10²³ molecules  / 1 mol

17.46× 10²³ molecules

Avogadro number:

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

3 0
3 years ago
What is the molar mass of sn(oh)4
umka2103 [35]
You answer would be: Molar mass of Sn(OH)4<span> is </span><span>186.7394 g/mol</span>
6 0
3 years ago
If the hydrogen ion concentration, (H+), in a solution is 5.39 x 10-8 M,
FrozenT [24]

Answer: 1.86*10^-7M

Explanation:

6 0
2 years ago
What is the best definition of federalism
liberstina [14]
<span>I believe its, the federal principle or system of government. Hope this can help!! >-<</span>
5 0
3 years ago
In which eukaryotic organelle are amino acids and fatty acids oxidized?
boyakko [2]
<span>centrosome
thylakoid
(peroxisome)
lysosome</span>
6 0
3 years ago
Other questions:
  • Which facts did you include in your response? Check all that apply.
    15·2 answers
  • What is the molecular geometry around a central atom that is sp3d hybridized and has three sigma bonds and two lone electron-pai
    11·1 answer
  • Carbon shares electrons indicating a _____ bond.
    5·2 answers
  • If you were running an experiment to determine the temperature at which
    6·1 answer
  • Find the mass of sucrose (molecular mass=342) required to be dissolved per 600cm² solution to prepare a semi molar solution.
    13·1 answer
  • Which is the top layer of groundwater?
    14·2 answers
  • If the solubility of a gas is 10.5 g/L at 650 kPa pressure, what is the solubility of the gas when the pressure is 200 kPa? Show
    5·1 answer
  • Genetically engineered crops (3 points)
    8·1 answer
  • Plants give off oxygen as part of photosynthesis. Explain the impact of this process on humans?
    10·1 answer
  • Water has a formula of H2O. Based on the formula which is NOT a correct statement?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!