How do you write balanced chemical formulas?

How many moles of MgSiO3 are in 233 g of the compound?

Kumar is producing the photoelectric effect by using red light. He wants to increase the energy of emitted electrons. Based on the research of Albert Einstein, what is the best way for him to do this? Increase the intensity of red light.

Manganese forms several oxides when combined with oxygen. One of the oxides (Oxide 1) contains 63.2% of Mn and another oxide (Oxide 2) contains 77.5% Mn. You will show that these compounds obey the law of multiple proportions.

A student was cleaning out the laboratory refrigerator and stumbled across an unlabeled vial of a colorless liquid. In order to identify it, the student measured several of its properties. Which of the properties is an intensive property?

Which can occur in the rock cycle? a. Sedimentary rock is heated and a squeezed to from metamorphic rock. b. igneous rock is eroded to from metamorphic rock. c. metamorphic rock melts to from sedimentary rock. d. none ofthe above.

The use of fertilizers in agriculture has significantly altered several nutrient cycles including:

If 31.6 g of KMnO4 is dissolved in enough water to give 160 mL of solution, what is the molarity? AND what mass of oxalic acid, H2C204, is required to make 300 mL of a. 74 M solution?

From where do the kinetic tiles collect energy?

For the reaction 2Fe + 3Cl2 → 2FeCl3 which of the following options gives the correct reactant:reactant ratio? Fe:Cl2 = 1:1 Fe:Cl2 = 2:3 Fe:Cl2 = 3:2 Fe:FeCl3 = 1:1

A 2.575 g piece of gold (specific heat = 0.129 J/g°C) at a temperature of 75°C is placed into cold water at 10°C. If the gold loses 10.0 J of energy, what is its final temperature in the water? Enter your answer to the nearest whole number of °C.