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ohaa [14]
3 years ago
15

You'll be given 100 points if you answer this question!!!!!!!!!!!!

Chemistry
1 answer:
storchak [24]3 years ago
5 0

Answer:conducts ,steel, polystyrene, thermal insulation

Explanation:

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Explain why glacial deposits have been found in Africa?
aliya0001 [1]

Glaciers were found in Africa because continents were connected and party covered with snow near the south pole long ago.

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3 years ago
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Based on your energy level calculations, predict the photon energies that would be emitted by transitions between the hydrogen e
mote1985 [20]

Answer:

The formula defining the photon energies that would be emitted by transitions between the hydrogen energy levels are given by the equation:

ΔE = -13.6Z²[1/n₁² - 1/n₂²]eV, where  (1 eV = 1.602×10-19 Joules) and n₁ = initial energy level  and n₂ = final energy level.

Z = Atomic number of the atom

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3 years ago
How do you determine how many molecules are in a chemical equation
V125BC [204]

Answer:

Determine the mass of substance and it's molar mass. Divide the given mass by it's molar mass to get moles and multiply time

6.002*1023 molecules 1mole

5 0
2 years ago
In an experiment, a student was assigned to find the formula of an unknown hydrate that weighed 15.67g. The anhydrate, XCO3 (mol
meriva

Answer:

5.0 moles of water per one mole of anhydrate

Explanation:

To solve this question we must find the moles of the anhydrate. The difference in mass between the dry and the anhydrate gives the mass of water. Thus, we can find the moles of water and the moles of water per mole of anhydrate:

<em>Moles Anhydrate:</em>

7.58g  * (1mol / 84.32g) = 0.0899 moles XCO3

<em>Moles water:</em>

15.67g - 7.58g = 8.09g * (1mol / 18.01g) = 0.449 moles H2O

Moles of water per mole of anhydrate:

0.449 moles H2O / 0.0899 moles XCO3 =

5.0 moles of water per one mole of anhydrate

6 0
3 years ago
Hey, i need help. the teacher provided notes but they don’t explain ANYTHING.
Arlecino [84]

Answer:

I think

1. A

2. 400

3. 100

4. IDK srry

Explanation:

Ijust want to help, but I also want brainliest

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