A48 g piece of ice at 0.0 ∘c is added to a sample of water at 7.4 ∘c. all of the ice melts and the temperature of the water decreases to 0.0 ∘c. how many grams of water were in the sample?

mass of water = 519 grams

Explanation:

∑Q = Q(melting ice) + Q(warming ice water) + Q(cooling solvent water) = 0

m·ΔH(fusion ice) + m·c·ΔT(ice water) + m·c·ΔT(solvent water) = 0

48g(80cal/g) + 48g(1cal/g°C)(0°C) + m(solvent water)(1cal/g°C)(0°C - 7.4°C) = 0

3840cal = m(solvent water)(1cal/g°C)(7.4°C)

m(solvent water) = 3840cal/7.4cal/g = 519 g solvent water.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l