Answer:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
Explanation:
Answer:
100g / (5.2g/cm3)
= 100g / (5.2g / 1cm3)
= 100g x 1cm3 / 5.2 g
= 19.2 cm3
Since 1 cm3 = 1 ml, your answer is 19.2 ml.
B. Intake valve is the correct answer
Mass percent is the amount of solute per amount of solution times 100.
Mass percent = 3.75 mol / L ( 1L / 1230 g ) ( 98.08 g / 1 mol ) 100 = 27.86%
Molality is the amount of solute in moles per kilogram solution.
Molality = 3.75 mol/L ( 1 L / 1230 g ) (1000 g / 1 kg ) = 2.84 mol / kg
Mole fraction is the<span> amount of solute per amount of solution with units of moles.</span>