Anybody who wants to be my friend?

Hot chocolate is stirred with a spoon the spoon gets hot because of

One of the hydrates of MnSO4 is manganese (II) sulfate tetrahydrate. A 71.6 gram sample of MnSO4 4 H2O was heated thoroughly in a porcelain crucible, until its weight remained constant.

A 27.3 g marble sliding to the right at 21.0 cm/s overtakes and collides with a 11.7 g marble moving in the same direction at 12.6 cm/s. After the collision, the 11.7 g marble moves to the right at 23.7 cm/s. Find the velocity of the 27.

A gas that has a volume of 28.0 liters, a temperature of 45.0 °C, and an unknown pressure has its volume increased to 34.0 liters and its temperature decreased to 35.0 °C. If I measure the pressure after the change to be 2.

Which of following materials is the poorest thermal conductor answers A. Neon gas B. water C. Plastic D. Steel

Which experimental feature of the MALDI-MS technique allows the separation of ions formed after the adduction of tissue molecules

A chemical is the class of atoms which contain the same number of protons

Calculate the percentage by mass of carbon in carbon monoxide

If entropy increases and enthalpy and temperature remain constant, the Gibbs free energy Group of answer choices A. decreases B. increases C. entropy has no effect

The number 0.000402 expressed in exponential notation is