For each solute, identify the better solvent: water or carbon tetrachloride

Na2S, C6H6, CH3OH, Br2

The temperature rises from 25.00 °c to 29.00 °c in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. calculate δerxn for the combustion of sucrose in kj/mol sucrose. the heat capacity of the calorimeter is 4.

Sulfur reacts with oxygen to form sulfur dioxide (SO2 (g), Hf = - 296.8 kJ/mol) according to the equation below. What is the enthalpy change for the reaction? Use

The atomic mass of silicon is approximately 28.055. Which of the following would indicate the number closest to 28.055? 1. atomic number 2. mass number 3. number of electrons + neutrons 4. number of protons + electrons

What is the pressure of a gas that began at 38 torr, and 500L and is changed to occupy a volume of 677 L?

You make the following measurements of an object: 42 kg and 22 m3. What would the object's density be? Show your work for credit and include final units

Categorize the following materials: bronze alloy, mouse growing an ear on its back, porcelain dentures

A decomposition occurs when you open a can or bottle of soda. Carbonic acid. H. CO, is in carbonated beverages. It decomposes into carbon dioxide and water.

Can someone reword this? A magnetic substance has magnetic fields. These fields start at the North Pole wrap around the magnet, and terminate at the south pole of the magnet. All magnetic substances have north and south poles

Which of these is produced when fossil fuels are burned? A) oxygen Eliminate B) nitrogen C) hydrogen D) carbon dioxide

Predict the sign of ΔSsys for each of the following processes. Which are positive? (a) Gasoline vapors mix with air in a car engine. (b) Hot air expands. (c) Humidity condenses in cold air.