How much heat is required to melt 123.0g of ice

Which of the following choices represents a balanced chemical equation? A. Ca3 (PO4) 2 + 6SiO2 → P4O10 + 3CaSiO3 B. 2Ca3 (PO4) 2 + 6SiO2 → P4O10 + 6CaSiO3 C. 2Ca3 (PO4) 2 + 3SiO2 → 2P4O10 + 2CaSiO3 D. 3Ca3 (PO4) 2 + 2SiO2 → P4O10 + 4CaSiO3

Pyruvate can be converted to lactate instead of going to the preparatory reaction. Why does this occur?

What is the average temperature on Mars?

Which is the correct order of increasing standard molar entropy for the noble gases? He ≤ Ne ≤ Kr ≤ ArHe ≤ Ne ≤ Ar ≤ KrNe ≤ He ≤ Ar ≤ KrKr ≤ Ar ≤ Ne ≤ He

Why does every chemical reaction require a certain amount of activation energy? A. Energy is released when the reactants begin to react. B. Energy lost to the environment during the reaction must be replaced. C.

Which statement best describes a mole?

The data below were collected for the following reaction at 500 ∘C: CH3CN (g) →CH3NC (g) Time (h) [CH3CN] (M) 0.0 1.000 5.0 0.794 10.0 0.631 15.0 0.501 20.0 0.398 25.0 0.

How do i convert 3.00 moles H2 to molecules?

How can you use the chemical formulas for sucrose (C6H, 20,) and rust (Fe, O,) to classity them ionic or molecular compounds?

What is true of energy as is passes through an ecosystem? a. All of the energy in an organism is used by the animal that eats it. b. Any stored energy in an organism is used by the animal that eats it. c.