Calculate the number of grams of silane gas, SiH4, formed when 34.9 g of Mg2Si reacts with excess H2O.

Using the information in the table, what is the average atomic mass of sulfur?

For an exothermic reaction, what effect will increasing the temperature have on the equilibrium? (A) There will be a shift toward the products. (B) There will be a shift toward the reactants. (C) There will not be a shift in equilibrium.

A sample of aluminum absorbs 9.86 J of heat, upon which the temperature increases from 23.2°C to 30.5°C. Since the specific heat capacity of aluminum is 0.90 J/g-K, what is the mass of the sample?

A 390 mL solutions of 4.6 M HCl is left out over the weekend and 74 mL of solvent evaporates. What is the new concentration of HCl?

How long does it take for the moon to rotate once on its axis?

Provide three different types of examples of how minerals form on earth

Which element has the lowest electronegativity? Calcium (Ca) Gallium (Ga) Selenium (Se) Bromine (Br)

Which of the following organs are found in the circulatory system? * A.) Heart B.) Veins C.) Arteries D.) Capillaries E.) All of the above

What's the difference between volcano and vent

A marshmallow has an initial volume of 0.084 L at standard pressure (1.0 atm). If the marshmallow is placed in a vacuum chamber and the final volume is 0.785L, what is the pressure inside the chamber?