3 years ago

The variables _ and __ affect the gravitational force between objects.

Chemistry

2 answers:

olchik [2.2K]3 years ago

7 0

I took the USA Test Prep and it is C

anastassius [24]3 years ago

5 0

I think the answer is A

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Compare the reactivity between lithium and sodium towards oxygen.

Scrat [10]

Reactivity of Group 1 and 2 elements increases as you go down the periodic table. So sodium is more reactive than lithium. Sodium will react with oxygen forming Na2O (sodium oxide). Lithium forms lithium oxide (Li2O).

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2 years ago

In the equation:

Ksenya-84 [330]

Answer:

B) 16 g

Explanation:

2H₂ + O₂ → 2H₂O

First we convert 4 moles of O₂ into moles of H₂, using the stoichiometric coefficients of the balanced reaction:

4 mol O₂ * $\frac{2molH_2}{1molO_2}$ = 8 mol H₂

Finally we convert 8 moles of H₂ into grams, using its molar mass:

8 mol H₂ * 2 g/mol = 16 g

Thus, the correct answer is option B).

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3 years ago

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A mole of CO2 = 2 moles of O2
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3 years ago

Which atom would be expected to have a half-filled 3d subshell?

lana66690 [7]

Answer:

Manganese: Mn

Explanation:

The elestron configuration would show this is 25 electrons

Atomic number : 25

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3 years ago

Which of the following can undergo metamorphosis?

Vaselesa [24]

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3 years ago

The variables _______ and ________ affect the gravitational force between objects.

The variables _ and __ affect the gravitational force between objects.