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Schach [20]
3 years ago
14

Plz help me guys for 20 points 5th GRADE SCEINCE

Chemistry
2 answers:
nikitadnepr [17]3 years ago
6 0
Number 3 I'm fairly sure because forests compete environmentally by being animal homes but it would help to build homes for the economy
Usimov [2.4K]3 years ago
3 0
Option 3 using forest land to build homes
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Calculate the volume of an object (in mL) if the density of the object is 4.08 g/mL and the mass of the object is 10.02 g.
slega [8]

Answer:

<h2>The answer is 2.5 mL</h2>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density}  \\

From the question

mass of object = 10.02 g

density = 4.08 g/mL

The volume of the object is

volume =  \frac{10.02}{4.08}  \\  = 2.4558823...

We have the final answer as

<h3>2.5 mL to one decimal place</h3>

Hope this helps you

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3 years ago
Which of the following should be classified as a mixture? water air iron helium
Evgesh-ka [11]
Air is a mixture because it is made up of many constituents like oxygen, argon etc. it can be physically separated by fractional distillation. it doesnt have a formula unlike compounds and elements. its composition varies differently with its constituents.
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What happens when a covalent bond vs. an ionic bond is formed?
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Explanation:

Ionic bonds form when a nonmetal and a metal exchange electrons, while covalent bonds form when electrons are shared between two nonmetals. ... A covalent bond involves a pair of electrons being shared between atoms. Atoms form covalent bonds in order to reach a more stable state.

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How many moles would there be in 1.5x10^24 molecules of water?
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5.85 moles

Explanation:

Moles in (3.52 X 10^24) molecules of water. 3.52 x 10^24 molecules x `1mol/6.02 x 10^23 molecules = 5.85 moles of H2O.

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