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Nikolay [14]
2 years ago
10

Determine the density of chunk of lead that has a mass of 1055 grams and a volume of 93.4 cm^3

Chemistry
1 answer:
Bad White [126]2 years ago
7 0
  • Mass=0155g
  • Volume=93.4cm^3

\\ \tt\longmapsto Density=\dfrac{Mass}{Volume}

\\ \tt\longmapsto Density=\dfrac{1055}{93.4}

\\ \tt\longmapsto Density=11.29g/cm^3

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I will give brainliest!!! In the reaction represented by the equation Al2O3 -> Al + O2, what is the mole ratio of aluminum to
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Answer:;

4:3

Explanation:

Balanced:

4Al + 302 yields 2al2O3

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2 years ago
During photosynthesis, plant leaves take in carbon dioxide through _______ in their leaves. a stomata b xylem c phloem
Iteru [2.4K]
<h3>Answer:</h3>

Stomata

<h3>Explanation:</h3>
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3 years ago
Recall rem = rad x q radiation weighting factor (q): the ability to transfer energy to the body 1 for photons 1 for electrons 2
tino4ka555 [31]

The biological risk for the first person than the second as a result of radiation weighting is 10 times.

<h3>What is radiation weighting factor?</h3>

As stated in the question, radiation weighting factor (q) is the ability to transfer energy to the body.

If radiation factor of proton = 2, and radiation factor of alpha particles = 20.

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Risk of first person with respect to second person = 20/2 = 10 times higher

Learn more about radiation factor here: brainly.com/question/24039736

#SPJ4

6 0
2 years ago
How Many protons is there
grigory [225]
Protons in science is positive
4 0
3 years ago
Why do reactivity increases on moving from top to bottom in group 2 of modern periodic table?
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Answer:

that's because....

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they can achieve that by just losing one electron from their outer shell.

as you go down the group 1, element gets bigger in size, which means there is more space between nucleus (which is in center of atom) and electron of outer shell. the more far away they are the less attraction force between them.

so its easier for potassuim to lose one electron than for lithuim.

so that means potassium will easily give up 1 electron to react with non metal or other element therefore it is more reactive than lithuim

but in case of non metal, the opposite happens but simple to understand.

as you go down the group 7 (halogen- Cl, Br, I) element will get bigger therefore force between nucleus and outer electron is getting smaller. they have to gain 1 electron in order to fill the outer shell (to gain noble gas electron configuration.)

as florine is more smaller in size than clorine it is more reactive because florine has more tendency to pull extra electron from metal or other element towards its side. so it easily gain 1 electron to react.

3 0
3 years ago
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