3 years ago

What are the two elements sand is made of? *

2 answers:

5 0

Well, much of the world's sand is made out of the same stuff, tiny crystals of the mineral quartz, which is made out of silica and oxygen, the two most common elements in Earth's crust.

olga55 [171]3 years ago

4 0

Answer:

tiny crystals of the mineral quartz, which is made out of silica and oxygen

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Paladinen [302]

Answer:

a boy pulling a toy train, the boy is

interacting with an object while applying a force to it,

another example of contact forces is friction.

Explanation:

A contact force is when two interacting

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4 0

3 years ago

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Total atoms of each element in<br>5CaCl2+3Ca(ClO4)2+4Ca(OH)2

Monica [59]

Answer:

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Oxygen O 15.9994 8 53.559%

Explanation:

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2 years ago

A balloon contains 5.5 L of air at 303 K and 101.3 kPa. After an hour, the air inside the balloon cools to 297 K. What is the fi

blagie [28]

The final volume of the air in the balloon would be about 5.4 L

7 0

3 years ago

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Choose the element that is more reactive: oxygen or argon.

Mazyrski [523]

I choose oxygen because

7 0

3 years ago

Indicate the FULL NAME and TOTAL NUMBER of each element in the chemical formula provided. *

REY [17]

Answer:

4 lead = Pb

2 nitrogen = N

6 oxygen = O

Explanation:

Know the rules of multiplying wth perentheses.

- Hope that helped! Please let me know if you need further explanation.

6 0

3 years ago