How many grams of He are present in 8.0 L of gas at STP

If the distance between two objects of the same mass decreased the force of gravity between them would

Determine the time required for an original 24.0-gram sample of sr-94 to decay until only 1.5 grams of the sample remains unchanged.

According to Le Chatelier's principle, what happens when the concentration of reactants is doubled in a chemical reaction that was in equilibrium? The equilibrium shifts to the right to favor the formation of products.

The average kinetic energy of asample of water molecule is?

Use the following equation to answer the question below: Sb2S3 (s) + 3Fe (s) - - > 2Sb (s) + 3FeS (s) When 18.45g Sb2S3 reacts with an excess of Fe, 12.1g Sb is produced. What is the percent yield of this reaction? 65.6% 75.4% 84.1% 91.5%

HBr + Mg (OH) 2 MgBr2 + H2O

What is the ability of a substance to be pulled into a wire? A malleability B ductility C conductivity D solubility

When a counterfeit detection pen is used on an authentic bill, what color does it turn? a. Pale blue b. Pale yellow c. Blue-black d. Pale pink

Why are the outer-most electrons the only ones included in the electron dot diagram?

What is the relationship between law of conservation and chemical reaction?