In monostremes the placenta absors oxygen and food from the mothers blood.

Your task is to measure the amount of energy evolved during the combustion of some hydrocarbon. Which of the following would be the ideal technique for this experiment? a. bomb manometry b. coffee-cup calorimetry c. bomb calorimetry

You measure the mass of a model car to be 230 grams. The actual mass is 218 grams. what is your percent error

The element that has the most important effect on the weldability of common gray cast iron is? A. copper B. Carbon C. Steel D. Sulphur

How many moles of H2O will be required to make 19.2 moles of O2

Which of the following does a transverse wave have? A) compressions B) amplitude C) rarefactions D) ability to travel through space

Chlorine gas can be prepared in the laboratory by the reaction of hydrochloric acid with manganese (IV) oxide. 4 HCl (aq) + MnO 2 (s) ⟶ MnCl 2 (aq) + 2 H 2 O (l) + Cl 2 (g) 4HCl (aq) + MnO2 (s) ⟶MnCl2 (aq) + 2H2O (l) + Cl2 (g) A sample of 43.

Calculate how many moles of glycine are in a 160.0-g sample of glycine. express your answer using four significant figures.

Which of the following words correctly describes CO2? Select all that apply A. Its a substance b its a compound c its a element D its a mixture

A certain reaction has an activation energy of 51.64 kj/mol. At what temperature Kelvin will the reaction be 5.50 times faster than it did at 343K?

What allows electrons to flow between electrodes in an electrochemical cell? a - conducting wire b - salt bridge c - electrolyte solutions d - battery