Which subatomic particle has a negative charge?

A) proton

B) electron

C) neutron

D) all particles

When 4.0 mol H2O react with 4.0 mol Al in the reaction below, 2.7 mol of Al are used up in the reaction. How many moles of Al are left over unreacted? 2 Al + 3 H2O → Al2O3 + 3H2 (C?) 2.7 mol Al left over 2.0 mol Al left over 1.3 mol Al left over 0.

In the following chemical reaction, which compound is a precipitate? NaCl (aq) + AgNO3 (aq) ⟶ NaNO3 (aq) + AgCl (s) NaCl AgNO3 NaNO3 AgCl

Creating a prototype and troubleshooting o are steps in the development of ___? A. a new scientific theory B. A new experiment C. A new scientific law D. A new technology

A commercial "fizz saver" pumps helium under pressure into a soda bottle to keep gas from escaping. Will this keep CO2 in the soda bottle? Explain your answer

Imagine the movement of a single gas molecule inside a container. explain the particle's motions in terms of kinetic-molecular theory.

If a drop of blood is 0.05 mL, how many drops of blood are in a blood collection tube that holds 8 mL?

Gasohol is a fuel containing ethanol (c2h6o) that burns in oxygen (o2) to give carbon dioxide and water.

Consider a neutral atom with 30 protons and 32 neurons. What is the atomic number of the element?

Find the molarity and molality of 37.0 wt% Hcl. Assume the density of the acid is 1.19g/ml

Which excerpt from "Bone Detective" best shows that Diane France is recognized as an expert in her line of work? But, once again, she was able to produce an amazingly detailed impression.