What is the electrical charge of a cation?

A. zero

B. positive

C. negative

What is the vapor pressure of water at 60˚C?

Grade In a chemical reaction, sulfuric acid and aluminium metal react to form hydrogen gas and a salt solution of aluminium sulfate.

Which structural adaptation do some plants have to attract pollinators? A. small leaves B. deep roots C. hard bark D. colorful flowers

Which three things are related according to Newton's second law? a. force, mass, and acceleration b. force, matter, and acceleration c. force, motion, and acceleration d. force, weight, and acceleration

The pauli exclusion pricipal states

A canister of acetylene has a volume of 42 L. The temperature of the acetylene is 305 K and the pressure is 780 torr. Determine the amount of gas in the canister

In terms of the scientific method, the purpose of an experiment is: form a hypothesis test a hypothesis form a conclusion develop data

Which layer of the earth can only be studied by indirect means

Is Euglena heterotroph or autotroph

What is the mass of 5000. atoms of silicon