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Setler [38]
2 years ago
10

Given the equation

Chemistry
1 answer:
astra-53 [7]2 years ago
4 0

Answer:

1.81 x 10^{24} molecules H2

Explanation:

Use Avogadro's number:

3 moles H2 x 6.022 x 10^{23} molecules= 1.81 x 10^{24} molecules H2

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what causes the water on quarters to form a curved dome shape, with the terms surface tension, cohesion and hydrogen bonding
olasank [31]

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3 years ago
Elements can combine to form molecules, like o2 or co2. elements combine to form molecules and these elements are joined togethe
Yuri [45]
Elements can combine to form molecules, like o2 or co2. elements combine to form molecules and these elements are joined together by  chemical bonds i.e covalent bond in this molecule so option A is correct 
hope this helps
8 0
3 years ago
Read 2 more answers
How many 1-cm cubes would it take to construct a cube that is 4 cm on edge? Express your answer using two significant figures.
Firlakuza [10]

Answer:

It would take 64 1-cm cubes to construct a 4-cm cube.

Explanation:

The volume of a cube is equal to the edge raised to the power of 3.

A 1-cm edge cube has a volume of V₁ = (1 cm)³= 1 cm³

A 4-cm edge cube has a volume of V₄ = (4 cm)³= 64 cm³

The number of small cubes required to fill the same volume than the big cube is:

\frac{V_{4}}{V_{1}} =\frac{64 cm^{3} }{1cm^{3} } =64

7 0
4 years ago
IN YOUR OWN WORDS How do scientists calculate the rate of plate movement?
agasfer [191]

Answer:

Scientist use GPS satellites and movement tracers.

Explanation:

8 0
3 years ago
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kow [346]

Answer:

No

Explanation:

<em>No. </em>T<em>he demonstration does not violate the conservation of mass.</em>

<u>The law of conservation of mass states that mass can neither be created nor destroyed in a reaction. However, mass can be converted from one form to another during the reaction.</u>

In this case, even though the remaining bits of paper weigh 0.5 g while the original paper weighed 2.5 g, the ashes and smoke/gas from the burning will all add up to the lost weight of the paper.

<em>The burned part has been converted into other forms. If the smoke/gas and the ashes are properly captured, they will mark up with the weight of the remaining paper to give the weight of the original paper. </em>

5 0
3 years ago
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