Answer:
the four most common elements in living organisms: carbon, hydrogen, oxygen, and nitrogen.
Explanation:
Answer:
Explanation:way
Hey I did a good night morning is the time for the
The answer is c. Can be used and consumed without risk
Consuming non potable water could generate a great risk toward our health because of the baacteria or any other small organism that might live in the water.
currentyly , about 89% people in the world have access to potable water. While the rest ( usually the one who live in non developed country) do not have access to it.
Answer:
0.062 moles of hydrogen gas
Explanation:
We must first out down the reaction equation before we can attempt to solve the problem.
Mg(s) + 2HCl(aq) ----> MgCl2(aq) + H2(g)
Next we obtain the number of moles in 1.5 g of magnesium metal from;
Molar mass of magnesium = 24.3 gmol-1
Number of moles of magnesium= mass/molar mass = 1.5g/24.3gmol-1 = 0.062 moles
From the reaction equation;
1 mole of magnesium metal yields 1 mole of hydrogen gas
0.062 moles of magnesium metal will yield 0.062 moles of hydrogen gas
Therefore, reaction of 1.5g of magnesium metal with excess hydrochloric acid will yield 0.062 moles of hydrogen gas.
