The constents would be anythign that stays the same in ever experiment.

Example: Growing sunflowers in different liquids

The constants could be: Type of dirt used to grow each, amount of liquid used to water, and the type of sunflowers grown.

4 0

2 years ago

Which will react faster NaCl or CH3COOH?

BlackZzzverrR [31]

I'm pretty sure its $NaCl$

3 0

2 years ago

A student determines the molar mass of a compound by the method used in this experiment. She found the temperature of the ice wa

cluponka [151]

Answer:

139.94 grams of solute is present in kilograms of water

Explanation:

Temperature of the ice water = T = 1.0°C

Temperature of the mixture = $T_f$ =-3.0°C

Depression in freezing point $\Delta T_f=T-T_f$

$\Delta T_f$ =1.0°C-( -3.0°C)=4°C

$\Delta T_f=k_f\times m=k_f\times \frac{\text{Moles of solute}}{\text{mass of solvent (kg)}}$

m = molality of the solution

$k_f$ = Molal depression constant

$4^oC=1.86^oC kg/mol\times \frac{\text{Moles of solute}}{0.0793 kg}$

Mole of solute = 0.1705 moles

Mass of solute = 11.1 g

Moles of solute = $0.1705 mol=\frac{11.1 g}{M}$

Molar mass of the solute= M

M = 65.088 g/mol

Molality of the solution = m = $\frac{0.1705 mol}{0.0793 kg}$

$m\times M=\frac{0.1705 mol}{0.0793 kg}\times 65.088 g/mol=139.94$ g of solute /kg of water

139.94 grams of solute is present in kilograms of water

3 0

2 years ago