Answer:its B
Explanation:
i have done this before! and i got 100 so i hope you got all the other questions right!
Answer:
Fossil fuels
Explanation:
Fossil fuels — natural gas, coal, and petroleum, and — provide most (63 %) of the energy consumed in the United States
The breakdown in 2019 was
Natural gas 38 %
Coal 24 %
Petroleum 1 %
Answer is: the molarity of the solution is 0.336 M.
m(Ca(NO₃)₂) = 127 g; mass of calcium nitrate.
n(Ca(NO₃)₂) = m(Ca(NO₃)₂) ÷ M(Ca(NO₃)₂).
n(Ca(NO₃)₂) = 127 g ÷ 164.1 g/mol.
n(Ca(NO₃)₂) = 0.77 mol; amount of calcium nitrate.
V(solution) = 2300 mL ÷ 1000 mL/L.
V(solution) = 2.3 L.
c(Ca(NO₃)₂) = n(Ca(NO₃)₂) ÷ V(solution).
c(Ca(NO₃)₂) = 0.77 mol ÷ 2.3 L.
c(Ca(NO₃)₂) = 0.336 mol/L; molarity of the solution.