Salad is a mixture because

the ingredients go

well together

the ingredients form

a pure substance

the ingredients are

not chemcically

combined

the ingredients are

chemically

combined

Which of the following is closest to the meaning of the term ancestor? A. a relative from long ago B. an organism that has evolved C. a trait that has changed over time D. an organism that is adapted to its environment

Viktor tests a solution with a strip of blue litmus paper. The paper turns pink. The solution is a

Ip a gas has a temperature of 310 k and a pressure of 100 kpa. part a find the volume occupied by 1.20 mol of this gas, assuming it is ideal.

A 1.00 * 10^-6 - g sample of nobelium, 254/102 No, has a half-life of 55 seconds after it is formed. What is the percentage of 254/102 No remaining at the following times? a) 5.0 min after it formsb) 1.0 h after it forms

In a controlled scientific experiment, a scientist ... ?

Which of the following actions will not increase the rate at which a solid dissolves in a liquid? A. increasing the surface area of a solid B. stirring the solid and the liquid C. increasing the amount of the solid D.

Does the amount of heat absorbed as 1 kg of saturated liquid water boils at 100°C have to be equal to the amount of heat released as 1 kg of saturated water vapor condenses at 100°C?

F. Protection of the body from infectious organisms is accomplished by which of these tissues? a) bone; b) muscle; c) nerve; d) blood

A compound that is composed of molybdenum (Mo) and oxygen (O) was produced in a lab by heating molybdenum over a Bunsen burner. The following data was collected: Mass of crucible: 38.26 g Mass of crucible and molybdenum: 39.

Which of the following elements has electrons in the 3d sublevel?