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il63 [147K]
3 years ago
6

What is mass in g of 15.5 moles of calcium?

Chemistry
1 answer:
padilas [110]3 years ago
4 0

Answer:

621.2090000000001 grams

Explanation:

1 moles Calcium to grams = 40.078 grams

15.5*40.078 = 621.2090000000001 g

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Right now it is soluble. that's why it is dissolved in the water. which of the following can I add to make it soluble
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Answer:

Barium nitrate or silver nitrate based on the anion our solute contains

Explanation:

I assume the situation is that currently the solute is soluble in water and you wish to make it insoluble.

It really depends on the soluble material you have, however, let's look at some specific cases.

  • We have a salt in our solution. Addition of any of the three reagents will produce a double displacement reaction, that is, our cation will be replaced by another cation, either sodium, barium or silver cation.
  • According to the solubility rules, all sodium salts are soluble, so sodium nitrate won't precipitate our anion.
  • In case our solute contains sulfate, carbonate or phosphate, we may use barium nitrate to precipitate it, as barium sulfate, barium carbonate and barium phosphate are insoluble.
  • In case our solute contains chloride, then silver nitrate is the way to go to precipitate it in an insoluble form of AgCl. Similarly, silver would form precipitates with carbonate, phosphate, iodide, bromide and slightly soluble silver sulfate (barium is the choice for sulfate, however).
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3 years ago
Bombardier beetles inject boiling hydrogen peroxide, or H2O2, into their victims. It then decomposes into hydrogen and oxygen ga
victus00 [196]
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4 0
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During the lab, you measured the pH of common household items. Write net Brønsted equations that show the acidic or basic nature
tamaranim1 [39]

Answer:

CaO + H₂O ⟶ Ca²⁺ + 2OH⁻

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CaO + H₂O  ⟶     Ca²⁺   +   2OH⁻

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Chemistry student needs of 55g acetone for an experiment. by consulting the crc handbook of chemistry and physics, the student d
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Answer:

             70.15 cm³

Solution:

Data Given;

                  Mass  =  55 g

                  Density  =  0.784 g.cm⁻³

Required:

                  Volume  =  ?

Formula Used:

                  Density  =  Mass ÷ Volume

Solving for Volume,

                  Volume  =  Mass ÷ Density

Putting values,

                  Volume  =  55 g ÷ 0.784 g.cm⁻³

                  Volume = 70.15 cm³

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What are the characteristics of Phosphate at room temperature?
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Answer: Phosphate is colorless , soft, waxy solid that glows in the dark when at room temperature.

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