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Citrus2011 [14]
3 years ago
13

Use the drop-down menus to select the correct answers to complete the paragraph.

Chemistry
2 answers:
JulsSmile [24]3 years ago
5 0

Answer:

f

Explanation:

Schach [20]3 years ago
4 0

Explanation:

The building blocks of matter are called atoms

A substance made up of the same kind of atoms is called a element

unstable  elements lose particles

This makes them radioactive

(i dd the assignment)

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If a nanometer is one billionth of a meter (0.000 000 00 1 m), how many nanometers are there in one meter?
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One billion

Explanation:

A nanometer is a BILLIONTH of a meter which means it takes one billion to equal a meter

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Which kind of investigations never include a hypothesis?
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the answer is descriptive

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How many moles of Pb are in 4.71 × 10^21 Pb atoms?
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0.00782 mol Pb

Explanation:

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A titration was performed on 50.0mL of 0.250 M NaOH.After the
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1.750 M

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In case of titration , the following formula can be used -

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V₂ = volume of base .

from , the question ,

M₁ = ? M

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M₁ = 1.750 M

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3 years ago
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