Which of the following can be used to produce electrical energy? A. solar cells B. generators C. batteries D. all of these

Which of the following would not have the same number of valence electrons as the others? boron aluminum gallium selenium

in chlorine gas, two chlorine atoms join to form a Cl2 (chlorine 2) molecule. How many pairs of valence electrons do the atoms share? What type of covalent bond is formed?

Which is a property of acids in aqueous solutions? They feel soapy. They taste bitter. They increase the concentration of H + ions. They decrease the concentration of H + ions.

a solution of household vinegar is to be analyzed. A pipet is used to measure out 10 ml of the vinegar which is placed in a 250ml volumetric flask.

If 35.8 g Mg react with 82.3 g HCl according to the reaction below, how many grams of hydrogen gas will produced, and how many grams of the excess reactant will be left over? Unbalanced equation: Mg + HCI - > MgCl2 + H2

Does pressure decrease when a gas is removed

This is the ability of matter to change into a different substance.

How can I write ecology in my own words for a definition

The amount of time it takes for one-half of the original amount of an isotope to decay is known as its

If enough heat is added to a substance, electrons begin to separate from the atomic nuclei. Which process does this describe? A. A solid turning into a liquid B. A plasma turning into a gas C. A gas turning into a plasma D.