Which of the following processes requires more heat energy?

a. raising the temperature of 100. g of water by 10.0 °C

b. raising the temperature of 50. g of water by 10.0 °C?

How do electronegativity values determine the charge distribution in a polar covalent bond?

Which of the following summarizes photosynthesis? A. glucose + carbon dioxide → oxygen + water B. carbon dioxide + water → glucose + oxygen + water C. oxygen + water → glucose + carbon dioxide + water D.

Which is the correct balanced equation for copper (ii) sulfate+aluminium➡️aluminium sulfate + solid copper?

A rock weighing 50 g is broken into 2 pieces. what age the possible weights for the two pieces of rock?

Be sure to answer all parts. consider the combustion of butane gas: c4h10 (g) + 13 2 o2 (g) → 4co2 (g) + 5h2o (g) (a) predict the signs of δs o and δh o. δs o : negative positive δh o : negative positive (b) calculate δg o at 298 k. kj

Samuel adds a teaspoon of salt to a glass of water. He notices that the song disappears. Samuel takes a sip to discover that the water taste salty. What kind of change has occurred?

How are the physical and chemical properties of atoms represented on the periodic table of elements

how do we know isotopes exist?

Is albinism a dominant or recessive trait

If T = dominant, and t = recessive, what would the genotypes be?