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lyudmila [28]
3 years ago
5

The _____ number is a positive or negative number assigned to an atom according to a set of arbitrary rules.

Chemistry
1 answer:
sergeinik [125]3 years ago
5 0

I think it is oxidation number

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How many molecules are contained in 1.55 moles of methane, CH 4 ?
Korolek [52]

Avogadro's law states that in one mole of a substance, there are 6.022 \times 10^{23} molecules.

This means that in 1.55 moles, there are 1.55(6.022 \times 10^{23})=\boxed{9.33 \times 10^{23} \text{( to 3 sf)}}

5 0
3 years ago
I need help what is s-1/3=7/9???? please help guys and thank you
nalin [4]

Answer:

10/9

Explanation:

First, let's convert 1/3 and 7/9 so that the have the same denominator. To do this let's find the least common multiple of 3 and 9.

List the multiples of 3 and 9:

3: 3, 9

9: 9

They have a least common multiple of 9

We need to convert 1/3 so it has a denominator of 9:

1/3*3/3 (we can multiply it by 3/3 because any number over itself is 1) = 3/9

s-3/9=7/9

Add 3/9 to both sides to isolate s

s=10/9

6 0
3 years ago
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</span>Chemical reaction of cellular respiration:
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There are 18 oxygen atoms (six in glucose and twelve in six molecules of oxygen) in left side of chemical reaction and also 18 oxygen atoms (twelve in six molecules of carbon dioxide and six in six molecules of water) at the right.
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3 years ago
Calculate the freezing point of an aqueous 0.10 m fecl3 solution using a van't hoff factor of 3.2.
Black_prince [1.1K]

ccccccccccccccccccccccccccccccccccc

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What is the density of an unknown if 7.82g of it occupies a volume of 3.63ml
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Just divide 7.82 by 3.63
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4 years ago
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