Which of the following has the greatest mass? Which of the following has the gre

Question

Which of the following has the greatest mass?

Which of the following has the greatest mass?

All of the above have the same mass.

Balance the chemical equation given below, and determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 40.00 mL of 0.00150 M calcium hydroxide.
________ Ca(OH)2(aq) + ________ H3PO4(aq) ________ Ca3(PO4)2(aq) + ________ H2O(l)

Balance the chemical equation given below, and determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 40.00 mL of 0.00150 M calcium hydroxide.
________ Ca(OH)2(aq) + ________ H3PO4(aq) ________ Ca3(PO4)2(aq) + ________ H2O(l)

13.3 mL

1.55× 10 23 molecules of O2 0.125 mol of O2 4.00 g of O2

All of the above have the same mass.

Balance the chemical equation given below, and determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 40.00 mL of 0.00150 M calcium hydroxide.
________ Ca(OH)2(aq) + ________ H3PO4(aq) ________ Ca3(PO4)2(aq) + ________ H2O(l)

Balance the chemical equation given below, and determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 40.00 mL of 0.00150 M calcium hydroxide.
________ Ca(OH)2(aq) + ________ H3PO4(aq) ________ Ca3(PO4)2(aq) + ________ H2O(l)

30.0 mL 2.70 mL 20.0 mL

13.3 mL

What is the balanced chemical equation for the reaction of element A (unshaded spheres) with element B (shaded spheres) as represented below?

What is the balanced chemical equation for the reaction of element A (unshaded spheres) with element B (shaded spheres) as represented below?

A + B AB A2 + B2 A2B 4A + 2B 4AB 2A2 + B2 2A2B

Explanation / Answer

1] 6*10^23 molecules of O2 = 32 gms

1.55× 10^23 molecules of O2 = 8.235 gms

1 mole of O2 = 32 gms

0.125 mole of O2 = 4 gms

4 gms O2

Answer is 1.55× 10^23 molecules of O2

2]

3Ca(OH)2(aq) + 2 H3PO4(aq) Ca3(PO4)2(aq) + 6 H2O(l)

3 moles of calcium hydroxide requires 2 moles of phosphoric acid to neutralize

moles of Ca(OH)2 = MV = 0.06*10^-3

0.06*10^-3 moles require = 2*0.06*10^-3 / 3 = 4*10^-5 moles of H3PO4

MV = 4*10^-5

V =13.33 ml

3] 2A2 + B2 -----> 2A2B

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