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Marizza181 [45]
3 years ago
6

PLEASEEEEE PLEASEEEEE ANSWER THIS QUESTION ILL GIVE BRAINLIEST AND 15 POINTSSSSS plzzzz!!!!!

Chemistry
2 answers:
zalisa [80]3 years ago
6 0

Answer:

D

Explanation:

A and B are completely wrong and C is partial but D is the best option

valina [46]3 years ago
4 0
Answer is choice away from earth
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Why air is classified as a mixture​
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Answer:

See explanation

Explanation:

Air contains a mixture of several molecules and compounds such as oxygen and carbon dioxide.

5 0
3 years ago
a sample of compound determined to contain 1.71 g C and 0.287 g H. The corresponding empirical formula is
fiasKO [112]

Answer: The empirical formula is CH_2.

Explanation:

Mass of C = 1.71 g

Mass of H = 0.287 g

Step 1 : convert given masses into moles.

Moles of C = \frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{1.71g}{12g/mole}=0.142moles

Moles of H = \frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{0.287g}{1g/mole}=0.287moles

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C =\frac{0.142}{0.142}=1

For H =\frac{0.287}{0.142}=2

The ratio of C: H = 1: 2

Hence the empirical formula is CH_2.

4 0
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Two adaptations to plants are described below:
Elza [17]

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D

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Sodium (Na) has atomic number 11.

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The property that determines an atom;s ability to attract electrons shared in a chemical bond is electronegativity. The correct answer is C.
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