Na2CO3 + CO2 + H2O → NaHCO3

1. Which of the following coefficients would correctly balance the

chemical reaction shown above?

A. 1,2,3,4

B. 1,1,1,2

C. 2,1,1,1

D. 2,2,3,1

When active metals such as magnesium are immersed in acid solution, hydrogen gas is evolved. Calculate the volume of H2 (g) at 30.1°C and 0.85 atm that can be formed when 275 mL of 0.

What contains more energy-endothermic or exothermic expain

What mass, in grams, of aluminum hydroxide will be required to prepare the 4 L of a 1.75 M solution?

3. With which temperature scale is temperature directly proportional to average kinetic energy? A. Celsius B Fahrenheit C. Kelvin D. centigrade 4. Which states of matter can flow? A. gases only B. liquids only C. gases and liquids only D.

How many bonding electrons are present in PO43-?

Determine the molecular weight of H2O. 18 g 18.0 g 18.01 g 18.016 g

Nonmetals gain electrons under certain conditions to attain a noble-gas electron configuration. how many electrons must be gained by the element c?

Which of these is a mixture? A. carbon b. oxygen c. air d. Carbon Dioxide

What hypothesis can you draw about penicillin

what is the height of a block with a length of 10cm a width of 5cm a mass of 50g and a density of 8.64g/cm3