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o-na [289]
3 years ago
12

What compotent of air is least nessasery for life on earth

Chemistry
1 answer:
taurus [48]3 years ago
5 0

Answer:

Oxygen is the component of air necessary for life on Earth. All living organisms require it for respiration.

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When coal burns, the reaction
katovenus [111]
Answer is B. Releases heat and is exothermic
4 0
2 years ago
Conservation of mass was discussed in the background. Describe how conservation of mass (actual, not theoretical) could be check
Sedbober [7]

Answer:

Conservation of mass can be checked in an experiment . There are three steps to do it in a best way:

1. Weigh all the equipment and materials required in the experiment before the experiment.

2. Avoid spillage and evaporation during the experiment.

3. Weigh all the equipment and materials after the experiment.

If the mass is conserved then weight from step 1 is equal to weight from step

3 0
3 years ago
Elena makes the table below to determine the number of atoms of each element in the chemical formula 3(NH4)2SO4
Hunter-Best [27]

Answer:

She should not have multiplied the nitrogen atom by subscript 2.

Explanation:

Chemical formula:

3(NH₄)₂SO₄

Elements present in given formula:

Nitrogen

Hydrogen

Sulfur

Oxygen

Total number of atoms of elements:

N = 3×1×2 = 6

H = 4×2×3 = 24

S = 1×3 = 3

O = 3×4 = 12

The number nitrogen atoms are six. Elena did mistake by counting the number of nitrogen. She should didn't multiplied the nitrogen atom by subscript 2.

5 0
3 years ago
Read 2 more answers
How many subshells are there in the shell with n = 6?
andre [41]
The number of subshells within a certain shell can be identified using the orbital angular momentum quantum number "l"

"l" is given values from zero till (n-1)
So, for n=6
l is given the following values: 0,1,2,3,4,5
Counting the number of subshells, we will find that the shell with n=6 has 6 subshells
7 0
2 years ago
25) How many unpaired electrons would you expect for the complex ion: [Co(OH)6]4-? A) 0 B) 5 C) 3 D) 1 E) 2 Answer: E
Mama L [17]

Answer:

Everyone, this is Ricky. And today we're working on Problem 51 from Chapter 22 and we're gonna determine the number of UNP. Aired electrons for the complex island of CEO seal for minus two I first up, let's determine the charge of art metal ion. So cue is our charge plus four minus one, which is a charge of each chloride ion. The overall charge of minus two Hugh is equal to plus two. I hope this will help

4 0
2 years ago
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