Which of these is a combustion and synthesis reaction?

A. CH4 + 2 O2 → CO2 + 2 H2O

B. Mg + O2 → MgO

C. H2O → H2 + O2

D. CaO → Ca + O2

If all the particles in a metal spoon start moving faster, how has the spoon's temperature change?

What is meant by the term solubility

The force between two objects each of charge + Q Is measured as + F when the objects are separated distance d apart. If the charge on each object is double determine the new force between them a) + 2F b) + 4F c) + 1/2F d) + 1/4F

The value of an equilibrium constant can be used to predict each of these except thea. Direction of a reactionb. Extent of a reactionc. Quantity of a reactants remaining at equilibriumd. Time remaining to reach equilibrium

For a solution with an [oh-] of 10-8 m, what would be the value of [h+], ph and poh, respectively? 1. 106 m, 6, 8 2. 10-6 m, 6, 8 3. 10-6 m, 8, 6 4. 10-14 m, 6, 8 5. 10-6 m, 6, 14 6. 10-14 m, 8, 6

Who created the periodic table and in what year?

Why is uranium 235 the most commonly used isotope for nuclear fission in current uses in nuclear power generation?

Based upon the pH scale, a vegetable with a pH of 5.3 would be

How many grams of Cl are in 535 g of CaCl2?

2. An object experiences an acceleration, g, when it is on the surface of a planet of radius R. What will be the acceleration on the object after it has been moved to a distance of 4R from the center of the planet? A) 168 B) 48 C) 1/4 g D) 1/16 g