When do elements absorb energy and enter an excited state?

Answers

Answer 1

Answer: When they change into a gas from a liquid or solid.

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What is the maximum mass of methane (CH4) that can be burned if only 1.0 g of oxygen is available and how do you figure it out?

Answers

Make the reaction: $CH_4+2O_2=CO_2+2H_2O$
For 2*32=64 grams of oxygen, you can burn 2*16=32 grams of methane (that is, half).
So, our answer is .5g.
Other intermediate calculations are mollecular masses:
$\mu_(CH_4)=A_C+4A_H=12+4=16 \n mu_(O_2)=2A_O=2*16=32$

Answer:

0.28 g of $CH_4$

Explanation:

You need a balanced equation first. $CH_4 + 2O_2$ ⇒ $CO_2 + 2H_2O$

You need to find the number of moles of oxygen, which is mass divided by the Mr: 1 ÷ 32 = 1/32

Then you find the moles of methane using the mole ration oxygen to methane 2:1. 1/32 ÷ 2 = 1/64

Then you find the mass by multiplying the Mr with the number of moles:

1/64 × 18 = 0.28125 g = 0.28 g

Talc _____. is the hardest known mineral has a Mohs hardness of 1 has a Mohs hardness of 10 is harder than quartz

Answers

Talc is the softest known mineral which is why it has a Mohs hardness of 1. The Mohs Hardness Scale is the most popular way of measuring and testing the hardness of a mineral. The Mohs hardness ranges from 1 (softest) to 10 (hardest). The hardest mineral with a Mohs hardness of 10 is diamond.

Talc is a clay mineral composed of magnesium silicates commonly used in making powder, paint, cosmetics, and many other products.

The answer is has a Moh's hardness of 1.

Which of the following types of radiation can be shielded by piece of paper or fabric

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There are 3 major types of radiation. The Alpha, Beta and Gamma radiation. It is the Alpha radiation that can be stopped by a piece of paper or fabric. Beta on the other hand can be stopped by plastic or a thin sheet of metal and Gamma by a piece of aluminum foil or lead.

What is the chemical formula for iron(III) oxide?
(1) FeO (3) Fe3O
(2) Fe2O3 (4) Fe3O=

Answers

The chemical formula for Iron (III) oxide is Fe203.

A solid-state component with three layers of semiconductors is a

Answers

A solid-state component with three layers of semiconductors is a transistor.

Answer: A solid-state component with three layers of semiconductors is a transistor.

Explanation:

A device with the help of which current or voltage is regulated and for electronic signals it acts as a switch or gate is known as a transistor.

A transistor has three layers of semiconductors. Each of these layers are capable of carrying current.

Thus, we can conclude that a solid-state component with three layers of semiconductors is a transistor.

How many atoms are in 6.2 moles of aluminum?

Answers

6.2×6.022×1023=3.733×1024 atoms.

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Write a balanced equation for the reaction of NaCH3COO (also written as NaC2H3O2) and HCl.

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What information does a chemical formula of a compound provide?a. The type and amount of elements b. The different kinds of compounds included within the chemical formula c. The types of molecules present in a formula d. The correct amounts of substances to mix together to make a formula