Which of the following is a property of an acid solution?

A. slippery to the touch

B. pH less than 7

C. turns red litmus paper blue

D. bitter taste

He mole fraction of potassium nitrate in an aqueous solution is 0.0194. The solution's density is 1.0627 g/ml. Calculate the molarity of the solution.

The cell theory was A. developed by Robert Hooke. B. developed before microscopes were invented. C. developed only after electron microscopes became widely used. D. developed by many scientists over many years.

The solar wind carries mass away from the Sun at a rate of about 1.5 million tons per second (1 ton = 1000 kg). At this rate, how many years would it take for all of the Sun's mass to escape?

What is the average temperature on Mars?

How many grams of carbon dioxide are produced from 0.98 mol of Fe3O4?

Which of the following processes includes all of the others? Group of answer choices transport of an ion down its electrochemical gradient osmosis passive transport facilitated diffusion

How is the Bohr atomic model different from the plum-pudding model? A. In Bohr's model, the atom's mass is found at its center instead of distributed throughout. B. In Bohr's model, the atom's mass is mostly made up of electrons instead of protons.

What does the cell theory state? A. that cells come from other cells B. that cells come only from animals C. that cells cannot be created or destroyed

For which one of the following molecules is the indicated type of hybridization not appropriate for M the central atom? a. BeCl2 sp2 b. SiH4 sp3 c. BF3 sp2 d. C2H2 sp e. H2O sp3

P4O10 (s) = - 3110 kJ/mol H2O (l) = - 286 kJ/mol H3PO4 (s) = - 1279 kJ/mol Calculate the change in enthalpy for the following process: P4O10 (s) + 6H2O (l) → 4H3PO4 (s)