How many grams of Al2O3 are required to react completely with 1500.0 kJ of heat? 2Al2O3 (s) + 3352 kJ → 4Al (s) + 3O2 (g)

answers

91.29 grams

2 grams

45.64 grams

1500 grams

What is the normal ph of rain?

A neutral atom has the atomic number 16 and a mass number of 33; how many protons, neutrons, and electrons are found within the atom?

Classify the following items based on the type of polymer they are made from: raincoats and leather shoes. A. Both are made from synthetic polymers. B. Leather shoes are made from natural polymers; raincoats are made from synthetic polymers. C.

What happened approximately 20,000 years ago? A. the last ice age B. the last glacial maximum C. the last interglacial period D. a change in Earth's axial tilt

Suppose you combine two substances but no chemical reaction occurs. Which of the following best describes the result? A. A solution B. A heterogeneous mixture C. A mixture D. A homogeneous mixture

Which of the following is not a characteristic of solids? a. particles in a solid are completely motionless. b. solids are not compressible. c. solids have a definite shape. d. solids have a definite volume.?

Jose gets up from his seat on the bus to move closer to the front. Just as he begins to walk forward, the bus stops at a light.

A rate is equal to 0.0200 M/s. If [A] = 0.100 M and rate = k[A][B]2, what is the new rate if the concentration of [A] is increased to 0.200 M?

Which of the following is smaller than the atomic radius of beryllium? a. the ionic radius of beryllium b. the atomic radius of lithium c. the ionic radius of carbon d. the atomic radius of magnesium

State one use of alkali metals