How many atoms are in 20 moles of carbon

Using a food calorimeter a 0.11 g sample of brazil nut was burned. the water in the calorimeter (95g) had its temperature go from 19.5 C to 26.86 C. What is the caloric value for Brazil nuts in kcal/g?

Benzoic acid dissociates in water to form hydrogen ions and benzoate ions. This reaction is an endothermic reaction: C6H5COOH (aq) ⇌C6H5COO - (aq) + H + (aq) Suppose this reaction is at equilibrium.

Describe atleast 3 types of effects that a toxic substance can have on the body

A solid that forms during a chemical reaction is called

Which of the following elements is a gas at room temperature? fluorine (F) sulfur (S) mercury (Hg) iodine (I)

Complete the following statement by checking all that apply Creativity allows scientists to develop multiple approaches to solving problems. adapt to changes in scientific knowledge. look at old problems in new ways.

The atomic weight of hydrogen is 1.00794. a. True b. False

Describe What kind of ions do metals form? What kind of ions do nonmetals form?

A car is driven through streets treated with salt and then parked in a warm garage. a) How will the rate of rusting compare with a car that has not been driven in the streets treated with salt but left parked outside?

Amalgam is an alloy that contains mercury and other metals. Which of these atoms would most likely form metallic bonds with mercury? Check all that apply. bromine copper hydrogen iodine silver tin