Aluminum is an element. Which best describes what makes up a sample of aluminum?

A. one kind of atom

B. two different kinds of atoms

C. all carbon-based atoms

D. a carbon atom and non-carbon atoms

What is the mass number of an element that has 30 protons, 35 neutrons and 30 electrons?

Which is bigger 108kg vs 10800g

Which species contains the lowest number of electrons

3 Ca + 2 AICI3 + 3 CaCl2 + 2 AI If you react 100. grams of aluminum chloride with excess calcium, how many grams of calcium chloride are produced?

Which quantity or quantities must always be the same on both sides of a chemical equation? check all that apply. check all that apply.

Research about the reaction of baking soda and vinegar

What mass (in mg) does 2.63 moles of nickel have? 3.56 * 105 mg 1.54 * 105 mg 2.23 * 104 mg 129 mg?

Given the propane molecule C3H8 (g) ! a) What is the balanced equation for the combustion of propane in O2? (20 pts.) b) What is the standard enthalpy change ΔH0 for the reaction at 25°C? (20 pts.

Which of the following happens during a chemical change? Check all of the boxes that apply. One atom or more changes into atoms of another element. New substances with different properties are formed. Solids, liquids, or gases may form.

Which has more inertia: a kilogram of cotton balls or a kilogram of gold?