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sweet-ann [11.9K]
3 years ago
11

What's the force between two moving objects that are touching called

Chemistry
1 answer:
m_a_m_a [10]3 years ago
7 0
I think it is friction.
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Why do people use block and teckle systems to move heavy objects?
yaroslaw [1]
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2 years ago
PLEASE ANSWER ASAP! DOUBLE CHECK THE ANSWER!
hammer [34]
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3 years ago
The atomic mass of magnesium is the weighted average of the atomic masses of
Debora [2.8K]

Answer:

2. All the naturally occurring isotopes of Mg.

Explanation:

You want to know the atomic mass of the magnesium you use in the lab. That’s “natural” magnesium. So, you must use the weighted average of all the naturally occurring isotopes in natural Mg.

1. and 3. are <em>wrong</em>. You won’t get the correct mass for natural Mg if you use only the artificial isotopes for your calculation.

4. is <em>wrong</em>. You must use all the naturally occurring isotopes. The two most abundant isotopes of Mg account for only 90 % of the atoms. If you ignore the other 10 %, your calculation will be wrong.

6 0
2 years ago
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raketka [301]
Reactants are what make up the product.
7 0
3 years ago
Read 2 more answers
Elle wanted to test how temperature affects the rate of evaporation. She had three setups:
Pie

Answer:

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Explanation:

Here the factor that Elle is controlling is the temperature. So temperature here is the independent variable and the dependent variable is the rate of evaporation of water.  Independent variable is controlled during the experiment setup and the outcome of the dependent variable depends on the independent variable.

5 0
3 years ago
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