0.75 atm x 760 mm Hg/atm = 570 mm Hg
Answer:
6.39 × 10⁻³ M
Explanation:
First, we will calculate the moles of HCl using the ideal gas equation.
P × V = n × R × T
n = P × V / R × T
n = 1.06 atm × 0.222 L / 0.0821 atm.L/mol.K × (26.0 + 273.15) K
n = 9.58 × 10⁻³ mol
The molar concentration of HCl is:
M = moles of HCl / liters of solution
M = 9.58 × 10⁻³ mol / 1.5 L
M = 6.39 × 10⁻³ M
<h3>
Answer:</h3>
0.10 L
<h3>
Explanation:</h3>
The concentration of glucose is given as 180 g/L
The mass of glucose is 18 g
- Concentration in g/L is calculated by dividing mass of the solute by the volume of the solution.
- When calculating molarity on the other hand, we divide number of moles of the solute by the volume of the solution.
- Concentration in g/L = Mass of solute ÷ Volume
Rearranging the formula,
Volume = Mass of the solute ÷ concentration
= 18 g ÷ 180 g/L
= 0.10 L
Therefore, volume of water is 0.10 L
Answer:
C. Electrons equal the number of protons
Explanation:
An atom is electrically neutral because...
a. Neutrons equal the number of protons
b. Proton forces pull on the neutrons
C. Electrons equal the number of protons
d. Electrons equal the number of neutrons
to be electrically neutral, the number os positive charges from thethe negative charges from the electrons
so
the number of protons must equal the number of electrons
ignore neutrons, they have NO charge
so
C. Electrons equal the number of protons
Answer:
the femur
Explanation:
a vestigial structure is useless, and a femur bone is not uselsess