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anastassius [24]
2 years ago
6

Q4. What are the different ways in which human being use rocks ?​

Chemistry
2 answers:
Sergio [31]2 years ago
5 0
Some people use rocks spiritually, games, and self protection. hope this helps!
Ghella [55]2 years ago
4 0

Answer:

To hit someone on the head

Explanation:

self protection

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How many molecules are present in a drop of ethanol, c2h5oh, of mass 2.3*10^-2.3g? (NA=6.0*10^23mol^-1)
sdas [7]

Answer:

3.0 × 10²⁰ molecules

Explanation:

Given data:

Mass of ethanol = 2.3 × 10⁻²°³ g

Number of molecules = ?

Solution:

Number of moles of ethanol:

Number of moles = mass/ molar mass

Number of moles = 2.3 × 10⁻²°³ g / 46.07 g/mol

Number of moles = 0.05 × 10⁻²°³ mol

Number of molecules:

One mole = 6.022 × 10²³ molecules

0.05 × 10⁻²°³ mol  ×  6.022 × 10²³ molecules / 1 mol

0.30 × 10²⁰°⁷ molecules

3.0 × 10¹⁹°⁷ molecules which is almost equal to 3.0 × 10²⁰ molecules.

5 0
3 years ago
How much energy is needed when 1.27 moles of sulfur reacts with excess
pav-90 [236]

Answer:

well what do you think it is

Explanation:

huh?..

6 0
3 years ago
How can separate the mixture of sugar and salt
lesantik [10]
Mixing them in different bowls
7 0
3 years ago
How many moles are present 560.0 g of iron (lll) sulfate
xxMikexx [17]

Answer:

1.400 mol

Explanation:

To convert grams to moles, you will need the molar mass.  The molar mass of iron(iii) sulfate is 399.88 g/mol.  Divide grams by the molar mass to find moles.

(560.0 g)/(399.88 g/mol) = 1.400 mol

There are 1.400 mol present in 560.0 g of iron(iii) sulfate.

3 0
3 years ago
Which noble gases can form compounds and under what conditions? Give EXAMPLES
rodikova [14]

Answer:

Following

Explanation:

4 0
3 years ago
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