Answer:
340 grams Ca₃P₂ (2 sig. figs.)
Explanation:
3Ca + 2P => Ca₃P₂
5.6 mole + excess => ? grams
Convert the 'known' to a coefficient of 1 by dividing all coefficients by 3.
=> Ca + 2/3P => 1/3Ca₃P₂
From the above, 1 mole of Ca => 1/3 mole Ca₃P₂
∴ 5.6 mole Ca in an excess of P => 1/3(5.6 mole) Ca₃P₂
=> 1.8666 mol Ca₃P₂ (calculator answer) ≅ 1.9 mol Ca₃P₂
=> 1.9 mole x 182 g Ca₃P₂/mol Ca₃P₂ = 339.73333 grams Ca₃P₂
≅ 340 grams Ca₃P₂ (2 sig. figs.)
Answer:
A crack in earth's crust is called a fault also known as a "fracture"
Answer:
At pH 8.59 the precipitation of acid will form.
Explanation:
The pH below which the drug will begin to precipitate can be calculated using the relation
pH = 
where S = total saturation solubility of the drug
S° = solubility of the undissociated species
substituting the respective values in equation, we get:
pH = 8.59
Answer:
D. The others are based on weather not climate.
Explanation:
