Question

what is the volume of a solution that has a density of
1.20 g/mL and a mass of 153 g?

what is a density of a liquid that has a mass of 2.638 g and a volume of 3.945 mL?

how many calories of heat are required to raise the temperature of 193 g of water from 25.0 C to 73.4 C? specific heat of water is 1.00 cal/g C

Answer #1

a.

Given

density = 1.20g/ml

mass = 153 grams

we know density = mass / volume

then volume of the solution = mass / density = 153 g / 1.20g/ml = 127.5ml

b.

Given

mass = 2.638g

volume = 3.945ml

we know density = mass / volume = 2.638g / 3.945 ml = 0.668g/ml

c.

given

mass = 193g

specific heat = 1 cal/g.^{0}c

T_{1} = 25^{0}c & T_{2} =
73.4^{0}c

we know

heat = mass * specific heat * change in temperature

q = m * s * (T_{2} - T_{1})

q = 193 g * 1.00 cal/g ^{0}c * (73.4 - 25) = 9341.2
cal

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