1. If 2.49 g of CuNO3 is dissolved in water to make a 0.830 M solution, what is the volume of the solution in milliliters? 2. How many moles of NaOH are present in 13.5 mL of 0.170 M NaOH?
3. Calculate the molarity of 0.650 mol of Na2S in 1.15 L of solution.
4. A student in lab needs to make a solution that is 7.00% by mass NaCl. If 145 g of NaCl is available, what mass of solution can be prepared?
5. Calculate the molarity of 24.1 g of MgS in 777 mL of solution.
6. A solution made by adding 16.3mL of methyl alcohol to enough water to give 541
mL of solution.

Explanation:

Hello!

In this case for the solution you are given, we first use the mass to compute the moles of CuNO3:

Next, knowing that the molarity has units of moles over liters, we can solve for volume as follows:

By plugging in the moles and molarity, we obtain:

Which in mL is:

Best regards!

water is used to store them because it would keep the radiation from getting out in the open and causing harm to the workers

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.