All of the following are chemical change except a) souring milk.

B) solution of sugar water

C) rusting iron

D) tarnishing of silver

Which statement about a methyl functional group is correct? 1) a methyl group consists of a carbon bonded of three hydrogen atoms 2) a methyl group is polar 3) a methyl group may be negatively charged

A 15.0 L tank of gas is contained at a high pressure of 8.20 x 10^4 torr. The tank is opened and the gas expands into an empty chamber with a volume of 6.00 x 10^4 L. Calculate the new pressure of the gas.

What role does genetic variation play in the existence of an organism?

Assuming dopant atoms are uniformly distributed in a silicon crystal, how far apart are these atoms when the doping concentrations are 5.0x1015 cm-3 and 5.0x1020 cm-3?

What is the mean of speed

Which would be the best way to represent the concentration of a 1.75 M K2CrO4 solution? 1.75% K2CrO4 [K2CrO4] (K2CrO4) K2CrO4, [M] = 1.75

Consider the reaction C12H22O11 (s) + 12O2 (g) →12CO2 (g) + 11H2O (l) in which 10.0 g of sucrose, C12H22O11, was burned in a bomb calorimeter with a heat capacity of 7.50 kJ/∘C. The temperature increase inside the calorimeter was found to be 22.0 ∘C.

List three pros and three cons of nuclear energy.

What is the formula or equation for motion, speed and energy?

What is called a bond between a metal and a nonmetal