If solutions of Na2CO3 (aq) and MgCl2 (aq) are mixed together, what is the formula of the solid product that results from the double displacement reaction? Hint:  Consult the solubility rules for ionic compounds.

Quick breads and biscuits use the thermal decomposition of sodium bicarbonate as their source of gas for rapid inflation instead of yeast to make the dough rise. The chemical reaction follows:                                              2 NaHCO3 (s) → Na2CO3 (s) + CO2(g) + H2O (g) What mass (g) of NaHCO3 is required to provide 2.28 L of CO2 gas at 475 K and 1.00 atm? Hint:  molar mass of NaHCO3 is 84.01 g/mol 

How many joules of energy is required to raise the temperature of a 15.0 g sample of iron from 25.0 °C to 45.5 °C?  Hint: The specific heat of iron is 0.450 J/g-K.

Which statement is NOT true about bacteria? Bacteria contain membrane bound organelles. Some are photosynthetic. Some are motile due to flagella. All bacteria are prokaryotes. Bacteria have a cell wall that contains peptidoglycan.

How many joules of energy is required to raise the temperature of a 25.0 g sample of iron from 21.0 °C to 55.0 °C?  Hint: The specific heat of iron is 0.450 J/g-K.

Of the following transitions in the Bohr hydrogen atom, which of the transitions shown below results in the emission of a photon with the lowest frequency?

Quick breads and biscuits use the thermal decomposition of sodium bicarbonate as their source of gas for rapid inflation instead of yeast to make the dough rise. The chemical reaction follows:                                              2 NaHCO3 (s) → Na2CO3 (s) + CO2(g) + H2O (g) What mass (g) of NaHCO3 is required to produce 2.12 L of CO2 gas at 495 K and 1.00 atm? Hint:  molar mass of NaHCO3 is 84.01 g/mol 

An atom’s atomic mass is best described as the mass of  the protons it contains. the neutrons it contains. electrons in the outermost shell. protons and neutrons it contains. protons and electrons it contains.

1. Choose the correct order of classification from most inclusive to most exclusive. a. Domain-Kingdom-Phylum-Class-Order-Family-Genus-Species b. -Domain-Class-Phylum-Order-Family-Genus-Species c. Kingdom-Domain-Class-Phylum-Order-Genus-Species-Family d. Kingdom-Class-Phylum-Domain-Genus-Order-Family-Species

Organic molecules are those that contain at least a. carbon. b. carbon and oxygen. c. carbon and hydrogen. d. carbon, oxygen, and hydrogen.