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timofeeve [1]
2 years ago
5

How many moles are in 3.4 x 10^-7 molecules of silicon dioxide, SiO2?​

Chemistry
1 answer:
avanturin [10]2 years ago
7 0

Answer:

Approximately 5.646 * 10^-17 moles

Explanation:

Avagardo's number is approximately 6.022 * 10^23 molecules. Therefore, dividing 3.4 * 10^7 by avagadro's number yields approximately 5.646 * 10^-17 moles. Hope this helps

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Balance the following equation Sa+ F2---> SF6
deff fn [24]

Answer:

s8 + 24f2 -> 8sf6

Explanation:

8 0
3 years ago
How many moles of Cu do you need to react with 12 moles of O2?<br> 2Cu(s) + O2(g) 2CuO(s)
zzz [600]

Answer:

24 mol Cu

General Formulas and Concepts:

<u>Chemistry</u>

  • Stoichiometry

Explanation:

<u>Step 1: Define</u>

RxN: 2Cu (s) + O₂ (g) → 2CuO (s)

Given: 12 moles O₂

<u>Step 2: Stoichiometry</u>

<u />12 \ mol \ O_2(\frac{2 \ mol \ Cu}{1 \ mol \ O_2} ) = 24 mol Cu

<u>Step 3: Check</u>

<em>We are given 2 sig figs.</em>

Our final answer is in 2 sig figs, so no need to round.

3 0
3 years ago
A sample of marble has a volume of 6 cm and a density of 2.76 g/cm3. What is its mass?
Alexus [3.1K]

Answer:

16.56g

Explanation:

d=m/v

2.76=m/6

2.76*6=m

16.56=m

m=16.56g

3 0
2 years ago
Zz. Compound A is crystalline, has a high melting point, and is more conductive when dissolved. Compound B is highly conductive
Gennadij [26K]

Answer:

Compound C is covalent.

Explanation:

Among the properties of a covalent compound is that it has poor conductivity and could possibly be a gas at room temperature.

4 0
2 years ago
Chemical substances that dissolve in water or react with water to release ions are known as
disa [49]
The answer is electrolytes. Strong electrolytes like strong acids, strong bases and salts dissociate completely into ions when dissolved and no neutral molecules are present in their solution. Weak electrolytes like weak acids and weak bases do not completely ionize in water and some neutral molecules are present in their solution, while nonelectrolytes do not dissociate into ions when in solution at all.
8 0
3 years ago
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