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FromTheMoon [43]
2 years ago
14

Coffee shops sell paper coffee cups with cardboard sleeves for customer safety. Why?

Chemistry
1 answer:
11111nata11111 [884]2 years ago
4 0

The cardboard sleeves reduce the heatness from the coffee cup. So then the cosumer does not get a burn.

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A stock solution is made by dissolving 66.05 g of (NH4)2SO4 in enough water to make 250 mL of solution. A 10.0 mL sample of this
Degger [83]
If the solute is properly distributed in the given volume, there are 2.642 g of (NH4)2SO4 per 10 mL. For the new solution, divide the 2.642 g by the molar mass of the compound. The answer is 0.02 moles. Then, divide this by the new volume, 50 mL or 0.05 L. The concentration of the new solution is 0.4 M. 
7 0
3 years ago
Read 2 more answers
Someone please help me please
mojhsa [17]

Answer:

1. Solid

2. Melting Point

3. liquid

4. Boiling point

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3 0
3 years ago
How many times more hydroxide ions are there in a solution with a ph of 9 than in a solution with a ph of 3?
cestrela7 [59]
The pH unit has 10x as many hydrogens ions as the unit above.
Ex: A pH of 5 would have 10x more hydrogen ions than a pH of 6 
and 100x more than if it had a pH of 7.
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1,000,000


4 0
3 years ago
What is the overall charge of the compound frbr
sammy [17]

Answer:

Zero  

Explanation:

FrBr is an ionic compound .

Fr is in Group 1. Br is in Group 17.

The charges on the ions are +1 and -1, respectively.

The compound consists of Fr⁺Br⁻ ions.

However, there are equal numbers of + and - charges, so

The overall charge of the compound is zero.

5 0
3 years ago
Assuming an electron is a hydrogen atom can undergo any of the transitions below, thus changing its energy. Which transition is
inn [45]

Answer:

n = 3 to n = 5

Explanation:

According to the Bohr's model of the atom, electrons in an atom absorb energy to move from a lower to higher energy level.

We must note that as we progress away from the nucleus, the energy levels of electrons become closer together. The energy difference between successive levels decreases and the wavelength of light associated with such transitions become longer.

Hence,the absorption of light of the longest wavelength corresponds to n = 3 to n = 5

.

5 0
3 years ago
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