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Nady [450]
3 years ago
15

Can someone please help me, I’m taking a test

Chemistry
1 answer:
lawyer [7]3 years ago
8 0

Answer:

Im pretty sure its none of these

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Which one is a true statement about endothermic reactions? a: More heat is given off than is put into the reaction. b :The react
Setler [38]
A because it gets hot
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3 years ago
How many electrons each atom gives or takes in KBr
notsponge [240]
K gives 1 electron, and Br takes 1 electron.
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3 years ago
Do subatomic particles have mass
katovenus [111]

Answer:

Yes

Explanation:

Masses for the three subatomic particles can be expressed in amu (atomic mass units) or grams. For simplicity, we will use the amu unit for the three subatomics. Both neutrons and protons are assigned as having masses of 1 amu each.

5 0
3 years ago
What is the average velocity of atoms in 1.00 mol of argon (a monatomic gas) at 275 K? For m, use 0.0399 kg. (1 point)
valentinak56 [21]

What is the average velocity of atoms in 1.00 mol of argon (a monatomic gas) at 275 k for m, use 0.0399kg

Answer: The average velocity of the atoms 847.33 m/s.

Explanation:

Moles of the neon = 1.00

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R = 8.31 J/mol K

The average velocity of the atoms 847.33 m/s.

6 0
3 years ago
What does a mole of iron weigh
r-ruslan [8.4K]

As the atomic mass of iron is 55.847u

We say that it is the mass of one mole of iron.

By formula it can be find by

No.of mole=mass in g/molar mass

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No.of mole =1

Molar mass = 55.847g

Mass in gram = 1x55.847

= 55.847g of Fe

3 0
4 years ago
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