Which equation is balanced?

A. Na+F2=2NaF

B. Mg+2O2=2MgO

C. 2Al+3F2=2AlF3

D. Al+3O2=Al2O3

Scientists have created an exact scale replica of a rover currently found on Mars and a miniature 3D landscape identical to that where the rover is currently located.

A 20.8-g sample of fuel is burned in the presence of oxygen. As a result, 9.8 grams of carbon dioxide and 17.3 grams of water are produced and captured in containers.

Which compound becomes less soluble in water as the temperature of the solution is increased? (1) HCl (2) KCl (3) NaCl (4) NH4Cl

Eva is in a closed, dark room. She uses her arm muscles to turn on a lamp. When she moves her hand closer to the lamp, the light heats her hand. The light bounces off the pages of a book and into her eyes.

If I have an unknown quantity of gas at a pressure of 50.65 kPa, a volume of 25 liters, and a temperature of 300 K, how many moles of gas do I have?

7.0 x 105 km Express your answer as an integer.

Strontium consists of four isotopes with masses and their percent abundance of 83.9134 amu (0.5%), 85.9094 amu (9.9%), 86.9089 amu (7.0%), 87.9056 amu (82.6%). how would you calculate the mass of Sr

The metabolism of glucose produces co2 (g) and h2o (l). how does the human body expel these reaction products?

The first dinosaur skeleton two was what kind of dinosaur

The addition of 3.72 g of Ba (OH) 2 · 8 H2O to a solution of 1.26 g of NH4SCN in 133 g of water in a calorimeter caused the temperature to fall by 4.3°C. Assuming the specific heat of the solution and products is 4.