Please help I’m stuck b. Water has a specific heat of 4.184 J/gºC. If the temperature of 250 g of
water changes from 22.9°C to 14.7°C, how much heat energy was removed
from the water?

C. A sample of aluminum (c = 0.900 J/gºC) is heated from 20.8°C to 38.7 °C
using 3,750 J of energy. What is the mass of the aluminum sample?

d. Determine the final temperature of sample with a specific heat of 1.1 J/gºC
and a mass of 385 g if it starts out at a temperature of 19.5°C and 885 J of
energy are added to it.

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices

If 15 drops of ethanol from a medicine dropper weigh 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? density of ethanol is ethanol is 0.80g/ml.