What is oxidation number for Mn in Mn2O7 (sign and number)

Which part of dalton's atomic theory was disproved by further scientific research?

How does the volume of an ideal gas at constant pressure change as the temperature increases?

You have 4.872 x 1034 atoms of Copper. How many moles is this?

if 1200 j of heat were absorbed by a 25 g block of iron, by how much would the temperature of the iron increase?

A. no color change was observed indicating that changing temperature does not affect equilibrium. b. increasing the temperature changes the solution to blue indicating that the equilibrium shifts to the left and decreasing the temperature changes

When 10 liters of a gas at 1 atm is compressed to 3 liters at constant temperature, what property of the gas changes?

What happens to the particles of a substance when thermal energy is added to the substance? A.) it's particles do not vibrate at all. B.) it's particles move faster. C.) it's particles move closer together. D.). It's particles move slower.

Suppose that you drop three objects into a glass of water: a piece of styrofoam, a piece of oak, and a gold ring. Which float, and which sink? density of styrofoam: 0.005 density of gold ring: 19.32 density of oak: 0.70

How many molecules following formula 3Al2 (SO4) 3

Will mark branliest. Calculating percent yield: For the reaction Cu + 2AgNO3 → Cu (NO3) 2 + 2 Ag, adding 127 grams of copper to lots of silver nitrate yields 410 grams of silver. What is the percent yield of silver? I'm desperate.