Yes, I am happy to help you, but if you know that just asking this, people earn points practically free.
Answer:
1.03M
Explanation:
mass/molar mass = moles of solution
50 g / (80+1) = 0.617 mol HBr
molarity*volume = moles
M*0.600 L = 0.617 mol
M = 0.617/0.600 = 1.03 M
Concave mirrors, magnifying lens... sorry not sure about the rest
Wavelength is the distance between crests of a wave. Wavelength can be calculated by the speed of light divided by frequency
Answer:

Explanation:
Moles of NaCl :
Given, Mass of NaCl = 72.24 g
Molar mass of NaCl = 58.44 g/mol
The formula for the calculation of moles is shown below:
Thus,

NaCl is a strong salt. So, moles of chloride ion = 1.2361 moles
Volume = 0.862 L
