CHEMISTRY HIGH SCHOOL

The equation [m] = mol/kg represents which concentration measurement?a. molarity
b. molality
c. parts per million

Answers

Answer 1
Answer:

B) Molality is the correct answer.

I know because I took the quiz in Time4Learning.
Answer 2
Answer: /bbbbbbbbbbhhbbbbbbbbbbbbbb

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In which type of reaction do two lighter nuclei combine to form one heavier nucleus?(1) combustion (3) nuclear fission
(2) reduction (4) nuclear fusion

Answers

Answer:

Nuclear Fusion

Explanation:

In nuclear fusion two lighter nuclei combine together in order to form one heavier nucleus.

For example, the energy generated from the Sun is made by nuclear fusion: Two hydrogen (H, atomic number 1) nuclei combine in order to form one helium  (He, atomic number 2) nucleus.

Nuclear fission is the opposite reaction, in which one heavier nucleus splits into two lighter nuclei.

Liquid petrol does not ignite spontaneously in air

Answers

The statement "Liquid petrol does not ignite spontaneously in air" is true. It needs a light nenergy or a spark for the combustion reaction to occur. Without it, it would not ignite spontaneously in air

An environmental chemist needs a carbonate buffer of pH 10.00. How many grams of Na,Co, must she add to 1.5 L of 0.20 M NaHCO,? K, of HCO, = 4.7 x 10"

Answers

Answer: a

Explanation: it just like simple math but it just adding stuff

2.0 cm + 2.6 cm + 4.2 mm =

Please show work

Answers

Hi ;)!
So:
4.2 mm (/10) = 0.42 cm

2.0 cm + 2.6 cm + 0.42 cm =  5.02 cm ;)

Hey guy I have presentation tomorrow on sodium . Can u give me ideas how to present it. So that students feel joy and easily understand

Answers

Answer:

first you could say did you know that you 3% of sodium in sprit but the good thing is that sodium wont make you gain any pounds if it weren't for sodium all are food wouldn't be preserved we would be eating unpreserved food witch could really hurt your body.

Explanation:

hope it  helps

A weather balloon at Earth’s surface has a volume of 3.9 L at 299 K and 763 mmHg. If the balloon is released and the volume reaches 4.13 L at 720 mmHg, what is the temperature? Answer in units of K.

Answers

Combined Gas Laws

Given: V1= 3.9L    V2= 4.13L   T1= 299K   P1=763mmHg   P2=720mmHg

Unknown: T2=?

Formula: T2=T1P2V2 / P1V1

Solution: T2= (299K)(720mmHg)(4.13L) / (763mmHg)(3.9L)
                   = 889,106.4 / 2975.7

Answer: T2=298.8K
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