Calculate the mass of a sample of lead (cPb = 0.16 J/g℃) when it loses 200 J cooling from 75.0℃ to 42.0℃.

Answers

Answer 1
Answer: looses 299 please collins 75.0

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Initial temperature of metal= 100 C°Initial temperature of water= ? C°
Final temperature of both =? C° (Copper)

Answers

Answer:

1.)100

2.)22.7

3.)24.6

Explanation:

EDGE2020

Water is 22.4

Final for both us 27.1

Explanation:

I just finished this part of the lab

If you want to melt ice into liquid water, does the ice absorbs heat or release heat? Is this endothermic or exothermic?

Answers

Answer:

Endothermic

Explanation:

This would be an endothermic reaction, due to the fact that the water would be signifigantly warmer then the ice cube, which causes it to melt.

Answer:

absorbs heat, which makes it endothermic.

Explanation:

Basically melting ice is it in windows or Mac reaction makes the ice absorbs heat energy which causes a change to occur

Impulse is ___ momentum. A. only a decrease in
B. a change in
c. not related to
D. only an increase in​

Answers

Answer:

option B is correct

Explanation:

impulse is a change in momentum

Calculate the relative molecular
mass of Zn (NO3)2

Answers

Answer:

Okyu

Explanation:

Mass of Zn = 65

(NO3)2 = 124

65 + (14 + 16 * 2) * 2 \n 65 + 124 \n  = 184g mol

Explanation:

Mass of Zn = 65

(NO3)2 = 124

\begin{gathered}65 + (14 + 16 \times 2) \times 2 \\ 65 + 124 \\ = 184g mol\end{gathered}

65+(14+16×2)×2

65+124

=184gmol

How many unpaid electrons are in 1s2 2s2 2p6 3s2 3p6

Answers

Answer:

As we can see, the first shell has its 2 electrons

the second shell has its 8 electrons

we know that the third shell also needs 8 electrons and we can see that the third shell also has 8 electrons.

Therefore, all the shells of this atom are filled and this atom is stable

So we can say that there are no unpaired electrons

Kindly mark Brainliest, thanks

Answer:

No unpaired electrons

Explanation:

This is because it is diamagnetic. Hope that helps:)

What is the solubility of substance?

Answers

Explanation:

Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent. It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. The resulting solution is called a saturated solution.