pH = 4.82
[H⁺] = 1.5 × 10⁻⁵ mol·L⁻¹.
pH = -log[H⁺] = -log(1.5 × 10⁻⁵) = 4.82
Answer:
i think this is the answer you can try it tho...
Explanation:
Notice that the value 12.01 grams of natural carbon is the same as the atomic mass value (12.01 amu). It also tells us that 26.98 grams of aluminum contains exactly 6.022 x 1023 atoms of aluminum.
Answer:
copper(ll)oxide
Explanation:
Limit reagent is a reagent that finished thereby stopping the reaction.
2NH3(g) + 3CuO(s)---> N2(g) + 3Cu(s) + 3H20(g)
molar mass of of ammonia = 17.031 × 2 (stiochiometry mole) = 34.06 g/mol
molar mass of CuO = 79.545 × 3 = 238.635 g/mol
molar mass of Nitrogen gas = 28.0134 g/mol
34.06 g of NH3 need 238.635 of CuO to produce 28.0134 of Nitrogen gas
238.635g produce 28.0134 g
x gram of CuO produce 26 gram of Nitrogen gas
x gram = ( 26 × 238.635 ) / 28.0134 = 221.484 g
also
34.06 g of ammonia produces 28.0134g of nitogen gas
y gram of ammonia produce 26g
y gram = (26× 34.06) / 28.0134 g = 31.61 g
but the 34 g of ammonia was used in the reaction and 31.61 reacted leaving and 2.39 g of ammonia gas
The limiting reagent therefore is copper(ll)oxide
A substance quickly heats and cools and is measured by its cups
