If you go to school for 180 days each year, and each day is 7 hours long how many hours are spent in one school year?

How many moles of trifluoromethanoic acid (CHF3O3S) are present in 9.0345 * 1024 molecules of (CHF3O3S) ? 1.5 * 10 23 mol, 1.5 mol, 15 mol, 1.5 * 1024 mol, 0.15 mol

What does energy transformation mean

At 1 atm of pressure and a temperature of 0 degrees celsius, which phases of H2O can exist? A.) ice only B.) ice and water C.) ice and water vapor D.) water only E.) not enough data to calculate

24g of magnesium were burned in oxygen. The compound formed had mass of 40 g. Explain why the mass has gone up

What causes hydrogen bonding? Select one: a. Motion of electrons b. Bonding of hydrogen to a highly electronegative element, specifically N, O or F c. Sharing of electron pairs d. Attraction between ions

How are electromagnetic different than all other waves

Find the ratio of speeds of an electron and a negative hydrogen ion (one having an extra electron) accelerated through the same voltage, assuming non-relativistic final speeds. Take the mass of the hydrogen ion to be 1.67*10^{-27} kg.

A type of rock that undergoes changes because of heat and pressure

How many milliliters of a 1.25 molar HCL solution would be needed to react completely with 60 g of calcium metal Ca+2HCl - - > CaCl2 + H2

What mass of copper is required to replace silver from 4. oog ogre silver nitrate dissolved in water