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4 years ago

1. What determines the reactivity of an atom?

1 answer:

5 0

The number of electrons in the outermost shell of an atom determines its reactivity.

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Some chemical reactions releases energy other store energy what important chemical reaction storage energy?

olganol [36]

Answer:

A chemical reaction that stores energy is called an endothermic reaction. More energy might be released as products form than the energy needed to break the reactants apart. This chemical reaction will release energy. In other words, it will be an exothermic reaction.

Explanation:

6 0

3 years ago

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In a chemical reaction, sulfur (S8) combines with copper to give a pure compound. If you start with 1.000 g of sulfur (S8) and o

Airida [17]

Answer: The empirical formula for the given compound is $Cu_2S$

Explanation:

We are given:

Mass of pure compound containing copper and sulfur = 4.963 g

Mass of S = 1.000 g

Mass of Cu = (4.963 - 1.000) g = 3.963 g

To formulate the empirical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Moles of Copper = $\frac{\text{Given mass of Copper}}{\text{Molar mass of Copper}}=\frac{3.963g}{63.55g/mole}=0.0624moles$

Moles of Sulfur = $\frac{\text{Given mass of Sulfur}}{\text{Molar mass of Sulfur}}=\frac{1.000g}{32g/mole}=0.0312moles$

Step 2: Calculating the mole ratio of the given elements.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.0312 moles.

For Copper = $\frac{0.0624}{0.0312}=2$

For Sulfur = $\frac{0.0312}{0.0312}=1$

Step 3: Taking the mole ratio as their subscripts.

The ratio of Cu : S = 2 : 1

Hence, the empirical formula for the given compound is $Cu_2S$

8 0

3 years ago

A creative super(hero/villian) using the element Zinc in the name

SCORPION-xisa [38]

Captain Zinc, Zincatron, Zincafier, Zinckers, Zincman, Zincit, etc. Please mark me brainliest I'm trying to level up

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3 years ago

What happened when the earth rotates?

miv72 [106K]

If the earth rotates 360 degrees at 100,000 mph the core of the earth would start burning up the entire human population would go extinct we would have to have an escape pod to go to mars and make a new home there

4 0

3 years ago

Heat, like work, is an energy transfer measured in a. watts. b. degrees. c. joules. d. Kelvins.

Vesna [10]

The answer is A watts

Glad I could help

6 0

3 years ago

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