Answer:
We'll have 1.00 mol H2
Explanation:
Step 1: Data given
Number of moles of Mg = 1.00 moles
Step 2: The balanced equation
Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g)
Step 3: Calculate moles of H2
For 1 mol Mg we need 1 mol H2SO4 to produce 1 mol MgSO4 and 1 mol H2
We'll have 1.00 mol H2
It's B, because a negative charged Ion is an anion. And since it's 1- ,one valence electron is been added to H. So it has 2 valence electrons.
Explanation:
The idea here is that you need to use the Periodic Table of elements to find the mass number of the most common isotope of phosphorus, P.
(a) Calculate the molar concentration of the dil. HCl
[H+] = 10^(-pH) mol/L = 10^(-1.80) mol/L = 0.015 85 mol/L
(b) Calculate the mass of HCl in the dil. HCl
Moles of HCl = 4.90 L dil solution × (0.015 85 mol HCl/1 L dil solution)
= 0.077 66 mol HCl
MM of HCl = (1.008 + 35.45) g/mol = 36.458 g/mol
Mass of HCl = 0.077 66 mol HCl x (36.458 g HCl/1 mol HCl) = 2.831 g HCl
(c) Calculate the volume of conc. HCl
Mass of conc solution = 2.831 g HCl x (100 g conc solution/36.0 g HCl)
= 7.865 g conc solution
Volume of conc HCl
= 7.865 g conc solution × (1 mL conc HCl/1.179 g conc solution)
= 6.67 mL conc HCl
D because wants you add the equation it should increase temp but decrease the value in pressure