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wel
3 years ago
7

All magnets are? Help please!?

Chemistry
1 answer:
ivann1987 [24]3 years ago
3 0

All magnets have both a north pole and a south pole

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What would you need to do to calculate the molality of 0.2 kg of NaCl in 3 kg
enot [183]

Answer:

D. Convert the 0.2 kg of NaCl to moles of NaCl

Explanation:

The molality equation looks like this:

Molality = moles of solute / mass (kg) of solvent

In this case, the solute is NaCl and the solution is water. So, if you have been given NaCl in kg, you need to convert it to grams and then to moles in order to plug it into the equation.

6 0
2 years ago
This equation indicates that the reaction absorbs heat. What is this type of reaction called? H2O + heat → H2 + O2 A. an exother
Anastaziya [24]
The answer is C. an endothermic reaction. The endothermic reaction means this reaction will absorb energy and exothermic reaction means this reaction will release energy.
7 0
3 years ago
Which electrolyte is used in an alkali fuel cell?
lyudmila [28]

Answer:  an aqueous potassium hydroxide solution

An alkaline fuel cell is a zero-emission device whose one major component is the electrolyte. An electrolyte, on the other hand,  is a solution that is able to conduct electricity. In an alkaline fuel cell. The electrolyte is an alkaline liquid, and potassium hydroxide also known as KOH is the only alkaline liquid among the choices. 

8 0
3 years ago
I’m so lost please help
ExtremeBDS [4]

C=4

D=-19

Explanation:

2exp-25/5exp-7= 4exp-19

7 0
3 years ago
How many grams of chlorine must be added to a balloon containing 8.00 grams of helium to double its volume?
Andrew [12]
The mole number of helium is 8/4=2 mol. Under same condition, the volume of gas is related to the mole number of the gas. So the mole number of chlorine is also 2 mol which is 142 g.
4 0
4 years ago
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