An ice cute at 0.0*c was dropped into 30.0 g of water in a
cupat 45.0*c. at the instant that all of the ice was melted,
thetemperature of the water in the cup was 19.5*c. what was themass
of the ice cube?

The mass of ice cube is 77.90 grams

Explanation:

When ice is mixed with water, the amount of heat released by ice will be equal to the amount of heat absorbed by water.

The equation used to calculate heat released or absorbed follows:

      ......(1)

where,

= mass of ice = ? g

= mass of water = 30.0 g

= final temperature = 19.5°C

= initial temperature of ice = 0.0°C

= initial temperature of water = 45.0°C

= specific heat of ice = 2.108  J/g°C

= specific heat of water = 4.186 J/g°C

Putting values in equation 1, we get:

Hence, the mass of ice cube is 77.90 grams

the food using pesticides in the future will harm you by giving you diseases like cancer or something since they have things that we should not eat in it like chemicals or pesticides. that is why organic food is more expensive because they take the time to make it right and healthy for you to eat.

explanation:

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.