Is ice and salt endothermic or exothermic

Christina is making macaroni for her family. Would she use 1 pound of macaroni or 1 ounce of macaroni.

In a combustion reaction, 46.0g of ethanol reacts with 96.0 g of oxygen to produce water and carbon dioxide. If 54.0 g of water is produced, what mass of carbon dioxide is produced?

Which ion in the ground state has the same electron configuration as an atom of argon in the ground state

1. In any nuclear reaction, nuclei are transformed in some way. True False 2. Two fissionable substances commonly used in nuclear reactors and nuclear weapons include uranium-235 and plutonium-239. True False 3.

Which of the following choices will an atom of sulfur (S) be most likely to bond with? A. 1 oxygen (O) atom B. 1 helium (He) atom C. 2 hydrogen (H) atoms D. 3 nitrogen (N) atoms

What is the empirical formula for C5H1102? * A. C10H2202 B. C5H110 C. C5H1102 D. C2H110

Who invented carbon element?

Which compound makes up nearly 30% of the "aroma" from human sweat?

4. a) The enthalpy change of combustion of hexane was measured using a calorimeter containing 200 cm3 of water; 0.5g of hexane (C6H14) was burnt. The temperature of the water increased by 30 K. Calculate the enthalpy change of combustion of hexane.

How many of each atom is present in the product ag2s