At constant pressure, when the temperature of a gas is decreased, what happens to its volume?

A student explained to the class that helium has 8 valence electrons because it is in group 18. Is the student correct? - The student is incorrect because helium has 2 valence electrons and it's in group 18 because the first energy level is full.

Why doesn't the reaction Pb+Zn (C2H3O2) 2--> Zn + Pb (C2H3O2) 2 occur?

Michael faraday reported that passing electricity through one solution liberated mass of hydrogen at the cathode and masses of oxygen at the anode.

If an element has three isotopes with known masses, what other information is needed to find the average atomic mass of the element

How do you know when all of the bromine has been consumed? Group of answer choices1. It will all be consumed by the cinnamic acid since you're using equal moles of each 2. It will be consumed as soon as you add some cyclohexene3.

A group of students wants to see how temperature affects the time it takes for spilled water to dry up in the investigation what will be the dependent and independent variables

What is not true of white light?

Diatoms and some yeasts are unicellular eukaryotes that have mechanisms of nuclear division?

Consider the circuit 9.012 9.012 What is its equivalent resistance? Answer in units of 12.

out of 2.00 50 mL of water is added to 30 mL of a 0.50 M salt solution. What is the new concentration? (To write your answer using scientific notation use 1.0E-1 instead of 1.0 x 10-1)