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V125BC [204]
2 years ago
9

Which characteristic does lithium, carbon and fluorine have in common:

Chemistry
1 answer:
Gnom [1K]2 years ago
5 0

Answer:

I think the answer is

2) They have the same number of valence electrons

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29. What is E for a system which has the following two steps:
jasenka [17]

Answer:

Zero

Explanation:

Recall that;

E = q + w

Where;

q = heat, w = work done

When heat is absorbed by the system q is positive

When heat is evolved by the system q is negative

When the system does work, w is negative

When work is done on the system w is positive

Step 1

ΔE1= 60 KJ + 40 KJ = 100KJ

Step 2

ΔE2= (-30 KJ) + (-70 KJ) = (-100) KJ

ΔE1 + ΔE2= 100KJ + (-100) KJ = 0KJ

4 0
3 years ago
The process by which nitrogen gas is converted to a usable form is called nitrogen
LenaWriter [7]

Answer: i beleive it is fixation in edge 2020

Explanation:

4 0
3 years ago
Read 2 more answers
H4X - pKa1 =1.5
Nataly [62]
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8 0
3 years ago
What is true of all body except sex cells
Evgesh-ka [11]
They can all by seperrated or replicated.

4 0
3 years ago
What mass of oxygen contains the same number of molecules as 42g of nitrogen?
lakkis [162]

Answer:

Given: 42 g of N2

Solve for O2 mass that contains the same number of molecules to 42 g of N2.

Solve for the number of moles in 42 g of N2

1 mole of N2 = (14 * 2) g = 28 g so the number of moles in 42 g of N2 is equal to 42 g / 28 g per mole = 1.5 moles

Solve for mass of 1 mole of oxygen

1 mole of O2 = 16 g * 2 = 32 g per mole

Solve for the mass of 1.5 moles of oxygen

mass of 1.5 moles of O2 = 32 g per mole * 1.5 moles

mass of 1.5 moles of O2 = 48 g

So 48 g of O2 contains the same number of molecules as 42 g of N2

3 0
3 years ago
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