Which one of the following is not a balanced equation?

A. 2Ca (s) + O2 (g) → 2CaO (s)

B. Ca (s) + O2 (g) → CaO (s)

C. 2Li (s) + 2H2O (l) → 2LiH (aq) + H2 (g)

D. CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)

The speed limit posted on a road is 55 mph. when the road is wet:

What is the magnitude of the kinetic frictional force

Which actions are evidence that a chemical reaction has occurred? Check all that apply. a change in color the formation of a precipitate a clear liquid becoming cloudy a change in shape the formation of bubbles the formation of smoke

6. If a person pushes a cart with a force of 40 N and it accelerates at 0.5 m/s2, what is the mass of the cart? a. 80N b. 80 kg C. 20 N d. 20 kg

Two identical spheres of equal mass a distance of 10 m apart a surface gravity of 0.0050 to each other where are the masses

You create a transformer by wrapping wire around an iron nail. The number of turns are: Primary (500); Secondary (2500). The Primary voltage is 3.00 V. The Secondary current is 200 mA.

A 90kg cannon fires 100kg shell with muzzle velocity of 75m/s. Calculate the recoil velocity of the cannon relative to the ground

The planet XYZ traveling about the star ABC in a circular orbit takes 24 hours to make an orbit. Assume that the orbit is a circle with radius 89 comma 000 comma 00089,000,000 mi. Find the linear speed of XYZ in miles per hour.

Your heart pumps 80 g of blood with each beat. The blood starts from rest and reaches a speed of 0.60 m/s in the aorta. If each beat takes 0.16 s, the average force exerted on the blood is a. 3.0" 102 N b. 0.22 N c. 0.16 N d. 0.30 N e. 0.98 N

What is the formula for calculating the mass when i have the number of volume and density