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Greeley [361]
3 years ago
9

What is one characteristic of a sample of matter that indicates it is a pure substance?

Chemistry
2 answers:
victus00 [196]3 years ago
8 0

Answer:d

Explanation:

Alexeev081 [22]3 years ago
6 0

Answer:

D

Explanation:

If the composition of a sample is fixed, the sample is a pure substance. According to the law of definite proportions (constant composition), components of a pure substance must be in definite ratios regardless of the source.

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MrRissso [65]

Answer:is D.the wave theory of light

Explanation:

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8. Water behind a dam, a moving car, and electricity moving in a circuit all are examples of
mote1985 [20]

Answer:

a. Help accomplish a job

Explanation:

Energy is defined as the ability to do work. It is the ability to get a job done.

Where energy is deficient, no job or work can be done.

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3 years ago
From a cross between a short-haired guinea pig (hh) and a long-haired guinea pig (Hh), what would be the possible phenotypes of
OleMash [197]

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Explanation:

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5 0
3 years ago
12 g of powdered magnesium oxide reacts with nitric acid to
galben [10]

Answer:

80.8 g

Explanation:

First, let's write a balanced equation of this reaction

MgO + 2HNO₃ → Mg(NO₃)₂ + H₂O

Now let's convert grams to moles

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24 + 16 = 40 g/mol

12/40 = 0.3 moles of MgO

We can use this to find out how much Magnesium Nitrate will be formed

0.3 x 1 MgO / 1 Mg(NO₃)₂ = 0.3 moles of Magnesium Nitrate formed

Convert moles to grams

Find the weight of Mg(NO₃)₂ but don't forget that 2 subscript acts as a multiplier of whatever is inside that parenthesis.

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148 x 0.3 = 80.8 g

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3 years ago
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