How many joules of heat are required to melt 115 g of ice?

Calculate the molality (m) of an aqueous solution of HCl which is 36.71% HCl by mass and has a density of 1.076 g/mL.

A chemical change : a. occurs when powdered lemonade is stirred into water. b. occurs when water is vaporized. c. occurs when paper is shredded. d. occurs when salt is dissolved in water. e. occurs when methane gas is burned.

Silicon dioxide reacts with carbon upon heating to produce silicon carbide (sic) and carbon monoxide. sio2 (s) + 3c (s) → sic (s) + 2co (g) a. what mass of carbon is required to react completely with 15.70 g of sio2? b.

Disintegration is the word geologists use forA. When a rock becomes moist. B. When rock is physically broken into smaller pieces. C. When rock is chemically broken into smaller pieces. D. When rock undergoes a rather large chemical change.

How many daltons is in an ion with 15 protons, 16 neutrons and 17 electrons?

An isotope contains 26 protons, 24 electrons, and 32 neutrons

Where is liquid waste held?

Molybdenum has a body-centered cubic unit cell. how many atoms of mo are present in each unit cell?

A solution of 3 moles of carbon disulfide in 10 moles of ethyl acetate has a vapor pressure of 170 torr at 28°c. the vapor pressure of pure carbon disulfide at 28°c is 390 torr. what is the vapor pressue of pure ethyl acetate at 28°c

What ion does a base give up