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natali 33 [55]
3 years ago
5

Name two elements that you would expect to have properties very much like those of calcium

Chemistry
1 answer:
Semmy [17]3 years ago
7 0
Beryllium, magnesium, strontium, barium, or radium. Hope this helped :))
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Which of the following is the ground state of an atom? Which is its excited state? Which is an impossible electron configuration
Rus_ich [418]

For this specific problem, these would be the answer to the following choices:

a. excited

b. ground

c. impossible

I am hoping that these answers have satisfied your queries and it will be able to help you, thank you and have a nice day.

3 0
3 years ago
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The normal freezing point of a certain liquid
stepladder [879]

Answer : The molal freezing point depression constant of X is 4.12^oC/m

Explanation :  Given,

Mass of urea (solute) = 5.90 g

Mass of X liquid (solvent) = 450.0 g

Molar mass of urea = 60 g/mole

Formula used :  

\Delta T_f=i\times K_f\times m\\\\T^o-T_s=i\times K_f\times\frac{\text{Mass of urea}\times 1000}{\text{Molar mass of urea}\times \text{Mass of X liquid}}

where,

\Delta T_f = change in freezing point

\Delta T_s = freezing point of solution = -0.5^oC

\Delta T^o = freezing point of liquid X= 0.4^oC

i = Van't Hoff factor = 1  (for non-electrolyte)

K_f = molal freezing point depression constant of X = ?

m = molality

Now put all the given values in this formula, we get

[0.4-(-0.5)]^oC=1\times k_f\times \frac{5.90g\times 1000}{60g/mol\times 450.0g}

k_f=4.12^oC/m

Therefore, the molal freezing point depression constant of X is 4.12^oC/m

4 0
3 years ago
Democritus contributed to our understanding of the atom in which of the following ways?
Marianna [84]
I believe the answer is 3 - He hypothesized that all substances can be broken down into a smallest part called the atom. 
7 0
3 years ago
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A graph of coal reserves in the United States versus time slopes downward.
Dafna1 [17]

Answer:

increased

Explanation:

I believe to be increased ,because the coal is a natural resource to be used.

i really hope it helps

4 0
3 years ago
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How many particles are in 697.008 grams of Potassium Sulfate?
g100num [7]

Answer:

174.2592

Explanation:

Trust me.

8 0
3 years ago
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