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3 years ago

New substances with what are formed during chemical changes

1 answer:

6 0

In chemical changes molecules in the reactants interact to form new substances, which mean means are broken up to form new bonds. No atoms are created or destroyed while undergoing the chemical change. In a physical change more like a state of change meaning shape, size or anything that effects how the object looked before then no new substances are formed.

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Convert 32 Fahrenheit to Celsius

valina [46]

Answer:

°F - 32/1.8000

Explanation:

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3 years ago

How many moles are in 3.00x 10^22 atoms of He?

sp2606 [1]

Answer:

<h2>0.05 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{3.0 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.049833...$

We have the final answer as

<h3>0.05 moles</h3>

Hope this helps you

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sergiy2304 [10]

Answer:

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Explanation:

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3 years ago

Read 2 more answers

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jasenka [17]

Answer: the ability to be dissolved, especially in water.

Explanation: I think the answer you've picked is right

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3 years ago

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JulsSmile [24]

Answer:

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3 years ago