Which of the following contains both ionic and covalent bonding?

CH4 NaCl NH4Cl N2O4

If the formula for a compound is represented by X2Y3 and the charge on the Y ion is - 2, what is the charge in the X ion?

+1

+2

+3

+4

A chemist must dilute of aqueous iron (II) bromide solution until the concentration falls to. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in milliliters.

Critical Thinking: Suppose you need to build a raft. Write a paragraph describing the physical and chemical properties of the raft that would be important to ensure your safety.

Which has a triangular fiber? Wool Silk Cotton Nylon

What do you think Jose's grandmother meant by saying that the bread was too dense? What other things can you think of that are "dense"?

1. Simplify. | A. O 16 B. O C. 04 D. O

A reaction will be spontaneous only at low temperatures if both ΔH and ΔS are negative. For a reaction in which ΔH = - 320.1 kJ/mol and ΔS = - 86.00 J/K · mol. Determine the temperature (in °C) below which the reaction is spontaneous.

Is it possible for a balloon with an initial internal pressure equal to 250.0 kPa to naturally expand to four times its initial volume when the temperature remains constant and the atmospheric pressure is 101.3 kPa?

How many atoms of gold (Au) are present in a sample of 2.5 mol Au? A. 1.5 * 1024 atoms Au B. 1.5 * 1023 atoms Au C. 4.2 * 1024 atoms Au D. 4.2 * 1023 atoms Au

what might cause the goldfish population to drop if the temperature moves out of its normal range? Name three things

Why must a chemistry experiments performed in a well ventilated room?