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jok3333 [9.3K]
3 years ago
5

Which two elements make up more than 90 of the dry weight of plants?

Chemistry
1 answer:
Temka [501]3 years ago
5 0
The elements are oxygen and carbon
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If you had a total sample of 35 candium- 15 M&Mium, 12 Skittlitium and 8 MPeanuttium. What is the relative abundance for eac
Flura [38]

<u>Given:</u>

Total Candium = 35

# of M&M = 15

# of Skittlitium = 12

# of Peanutttium = 8

<u>To determine:</u>

The relative abundance  for each

<u>Explanation:</u>

Relative abundance = amount of each item in the sample/Sample total

M&M = 15/35 = 0.429 (or) 42.9 %

Skittlitium = 12/35 = 0.343 (or) 43.3 %

Peanuttium = 8/35 = 0.229 (0r) 22.9%

4 0
3 years ago
Why does your skin feel drier in winter????​
Anuta_ua [19.1K]

Answer:

“It's that loss of moisture from upper layers of the skin that causes it to dry out.” Winter air is often dry, and the air that comes out of indoor furnaces can be even worse. However, dry skin can make its mark at other times of the year, too.

Explanation:

5 0
3 years ago
Read 2 more answers
The decomposition of N2O to N2 and O2 is a first-order reaction. At 730°C, the rate constant of the reaction is 1.94 × 10-4 min-
fomenos

Answer:

The total pressure after one half is 6.375 atm.

Explanation:

The initial pressure of product is increases while the pressure of reactant would decrease.

Balanced chemical equation:

2N₂O  → 2N₂ + O₂

The pressure of N₂O is 5.10 atm. The change in pressure would be,

N₂O = -2x

N₂ = +2x

O₂ = +x

The total pressure will be

P(total) = P(N₂O) + P(N₂)  + P(O₂)

P(total) = ( 5.10 - 2x) + (2x)  + (x)

P(total) = 5.10 + x

After one half life:

P(N₂O)  = 1/2(5.10) = 5.10 - 2x

x = 5.10 - 1/2(5.10) /2

x = 5.10 - 0.5 (5.10) /2

x = 5.10 - 2.55 / 2

x = 2.55 /2 = 1.275 atm

Thus the total pressure will be,

P(total) = 5.10 + x

P(total) = 5.10 + 1.275

P(total) = 6.375 atm

4 0
3 years ago
Which describes the correct procedure when converting a number from scientific notation to standard notation? A If the power of
MissTica

Answer:

I think it's B

Explanation:

I think it is b because if the number is positive the zeroes will be on the left so you move the decimal to the right to get rid of the zeroes.

6 0
3 years ago
When diagramming an atom, the electron shells ____________ the nucleus must be filled first?
Nonamiya [84]

Concept: According to the basic concept of the electronic configuration of the element, the electron can be filled first in those shell which has least energy or (n +l) value. Here, n is the principal quantum number on shell and l is the azimuthal quantum number.

Since, the first shell has least value of energy in any atom. So, it should be filled first.

Hence, the correct statement can be written as;

When diagramming an atom, the electron shells _nearest to _ the nucleus must be filled first.

4 0
3 years ago
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