Which element is a gas at STP?

1) sulfur

2) xenon

3) potassium

4) phosphorus

The number 1,645.6 expressed in scientific notation equals what?

Which represent potential energy? A. A candy bar B. A stretched rubber band C. Wind D. A roller coaster at the top of a hill E. Rowing a boat F. A ball rolling down a hill

Virtually no chemical reaction can occur in the body in the absence of enzymes. how might excessively high body temperature or acidosis (acidic blood ph (interfere with enzyme activity 28.

Calculate the molecular formulas of the compounds having the following empirical formulas and molar masses: C₂H₅, 58 g/mol; CH, 78 g/mol; and HgCl, 236.1 g/mol.

Addition of an excess of lead (II) nitrate to a 50.0mL solution of magnesium chloride caused a formation of 7.35g of lead (II) chloride precipitate. What was the molar concentration of chloride ions in the solution (in mol/L) ?

What occurs in a chemical reaction? Products are formed from reactants by the breaking and forming of new bonds. Products are formed without chemical bonds being broken. Reactants are formed without chemical bonds being broken.

What information does the atomic mass of an element provide

The following diagram represents a vertical cross section of sedimentary rock layers that have not been overturned. Which principle best supports the conclusion that these layers have undergone extensive movement since deposition?

What kind of ions do a sodium atom and a chlorine atom become when a valence electron is transferred from one to the other?

NaOH and bleach have several characteristics in common. They include all BUT one of the characteristics listed.