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schepotkina [342]
4 years ago
7

What mass of sodium phosphate is necessary in order to produce 5.00 g of calcium phosphate

Chemistry
1 answer:
stealth61 [152]4 years ago
6 0

Answer:

The answer to your question is the letter C

Explanation:

mass of Na₃PO₄ = ?

Ca₃(PO₄)₂ = 5 g

Balanced chemical reaction

                2Na₃PO₄  +  3CaCl₂  ⇒  6NaCl  + Ca₃(PO₄)₂

Process

1.- Calculate the molar mass of Sodium phosphate and calcium phosphate.

Na₃PO₄ = 2[(3 x 23) + (31 x 1) + (16 x 4)]

             = 2[69 + 31 + 64]

             = 2[164]

             = 328 g

Ca₃(PO₄)₂ = (3 x 40) + (31 x 2) + (8 x 16)

                 = 120 + 62 + 128

                 = 310 g

2.- Use proportions to find the mass of Na₃PO₄

              328 g of Na₃PO₄ -------------------- 310 g of Ca₃(PO₄)₂

                  x                        -------------------  5 g

                  x = (5 x 328) / 310

                  x = 1640 / 310

                  x = 5.29 g of Na₃PO₄              

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The mass in grams of C in 275 g of C3H6
Furkat [3]

Answer:

Mass of carbon = 236.5 g

Explanation:

Given data:

Mass of C₃H₆ = 275 g

Mass of C = ?

Solution:

Formula:

Mass of carbon =  molar mass of carbon/ molar mass of compound × mass of compound

Molar mass of carbon = 12 g/mol

Molar mass of compound = 42 g/mol

Mass of carbon = 36 g/mol / 42 g/mol × 275 g

Mass of carbon = 0.86 × 275 g

Mass of carbon = 236.5 g

3 0
3 years ago
if .40 L if water is added to the volume of cup 3, what would be the new molarity of a 2 M solution of kool-aid
stiks02 [169]

Answer:

0.7692 M ≅ 0.77 M.

Explanation:

  • It is known that the no. of millimoles of a solution before dilution is equal to the no. of millimoles of the solution after the dilution.
  • It can be expressed as:

<em>(MV) before dilution = (MV) after dilution.</em>

M before dilution = 2.0 M, V before dilution = 0.25 L.

M after dilution = ??? M, V after dilution = 0.25 L + 0.40 L = 0.65 L.

∴<em> M after dilution = (MV) before dilution/(V) after dilution</em> = (2.0 M)(0.25 L)/(0.65 L) =<em> 0.7692 M ≅ 0.77 M.</em>

8 0
3 years ago
Please help me with this chem question!!
schepotkina [342]

Answer:

caca123

Explanation:

UM

6 0
3 years ago
Avanti works in a bookstore. She has four books and is going to place them in two stacks. How did the temperatures of the four b
Fed [463]
In the bookstore Avanti gave four books so it would be 1
6 0
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barium chloride (Ba(CIO3)2) breaks down to form barium chloride and oxygen. what is the balanced equation for this equation?
kompoz [17]

Answer:

Ba(ClO₃)₂ → BaCl₂ + 3 O₂

Explanation:

When exposed to heat, barium chlorate (Ba(ClO₃)₂ breaks down into an inorganic compound (Barium chloride - BaCl₂) and a molecule (Oxygen - O₂).

6 0
4 years ago
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