Explanation:
temperature changes affect seawater density as water cools its density increases. As water cools H2O molecules pack more closely together because the molecules are vibrating less at low temperatures and take up less volume. The same number of water molecules in smaller volume results higher density
Answer:
Mass = 2.89 g
Explanation:
Given data:
Mass of NH₄Cl = 8.939 g
Mass of Ca(OH)₂ = 7.48 g
Mass of ammonia produced = ?
Solution:
2NH₄Cl + Ca(OH)₂ → CaCl₂ + 2NH₃ + 2H₂O
Number of moles of NH₄Cl:
Number of moles = mass/molar mass
Number of moles = 8.939 g / 53.5 g/mol
Number of moles = 0.17 mol
Number of moles of Ca(OH)₂ :
Number of moles = mass/molar mass
Number of moles = 7.48 g / 74.1 g/mol
Number of moles = 0.10 mol
Now we will compare the moles of ammonia with both reactant.
NH₄Cl : NH₃
2 : 2
0.17 : 0.17
Ca(OH)₂ : NH₃
1 : 2
0.10 : 2/1×0.10 = 0.2 mol
Less number of moles of ammonia are produced by ammonium chloride it will act as limiting reactant.
Mass of ammonia:
Mass = number of moles × molar mass
Mass = 0.17 mol × 17 g/mol
Mass = 2.89 g
Answer:
if the pH of a solution is 2.0 that means the solution would be acidic.
Explanation:
The mass of 2,301 grams of sodium in ounces is 0.0811757609 ounces.
The amount of sodium recommended by American heart association is 2301 mg. This limit should not be crossed in a day.
We have to convert Mass of sodium from mg to ounces.
We know,
1 ounce = 28.3459 grams.
We also know,
1 gram = 1000 milligrams.
So,
28.3459 grams = 28.3459 x 1000 milligrams.
28.3459 grams = 28345.9 milligrams.
1 ounce = 28345.9 mg.
1 mg = 1/28345.9 ounces
Weight of sodium 2301mg in ounces,
2301mg = 2301/28345.9 ounces
Dividing till last significant figure,
2301 mg = 0.0811757609 ounces.
Mass of sodium in ounces is 0.0811757609.
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