Which of the following is a noncontact force?

A.

magnetic forces

B.

electrical forces

C.

gravitational forces

D.

all of these

2Mg + O2 forms the compound magnesium oxide (2MgO). How many molecules of magnesium oxide are represented? three four one two

Which type of radioactive product has zero mass and zero charge?

How to solve 4 NH3 (g) + 5 O2 (g) - --> 4 NO (g) + 6 H2O (g) in chemistry

The poem "from blossom" inspires readers to appreciate the the joy of the presebt

Two different compounds are formed by the elements nitrogen and oxygen. The first compound, compound P1, contains 64.17% by mass nitrogen and 35.73% by mass oxygen. The second compound, compound P2, contains 47.23% by mass nitrogen and 52.

Combined gas law problem: a balloon is filled with 500.0 mL of helium at a temperature of 27 degrees Celsius and 755 mmHg. As the balloon rises in the atmosphere, the pressure and temperature drop.

1. What hypothesis could you propose about the relationship between the position of a type of atom in a molecule and the number of bonds that the atom forms? Explain your thinking.

The molality of a solution is a measure of - A - moles of solute per kilogram of solution B - moles of solute per liter of solution C - moles of solute per kilogram of solvent D - moles of solute per liter of solvent

Which technology has allowed for exploration beyond our solar system? A) space probe B) space station C) space shuttle D) space observatory

Which carbonate is most stable to heat? A. Sodium carbonate B. Copper (ii) carbonate C. Zinc carbonate