A weather balloon is inflated to a volume of 2.2*10^5L with 37.4g of helium. What is the density of helium in grams per liter?

Photosynthesis transfers electrons from water to carbon dioxide molecules. Why is this electron transfer called an oxidation reduction process?

Why was it important to polish the copper strips and wire, the coin, and the nail in the electroplating experiment? You need to remove a layer of copper from the surface of each material.

At 524 mm Hg and 35 °C, a sample of gas occupies a volume of 275 ml. The gas is transferred to a 325-ml flask and the temperature is reduced to 5 °C What is the pressure of the gas in the flask in mmHg?

A 988ml sample of air is at 852 mm Hg and 34.1 C. What will the temperature of this gas be, in Fahrenheit, at 955 mm Hg and a volume of 602 mL

Identify the indicator that can be used at the highest ph.

134 miles=? inches. Chemistry

A solution can be both a. Dilute and concentrated b. Saturated and dilute c. Saturated and unsaturated d. Supersaturated and saturated e. None of these

When the concentrations of reactant molecules are increased, the rate of reaction increases. The best explanation for this phenomenon is that as the reactant concentration increases, A) the average kinetic energy of molecules increases.

The average kinetic energy of the particles in a gas A. is not affected by the temperature of the substance. B. increases as the temperature of the substance decreases. C. is proportional to the temperature of the substance. D.

If the molar mass of NaCl is 58.44 g/mol, what amount of NaCl (in mol) is contained in 250.0 mg of NaCl?