Give the number of significant figures in this number: 7.8 x 10¹²

A liquid that occupies a volume of 0.820L has a mass of 2.56kg. what is the density of this liquid in kg/L

If an object is only partially submerged in a fluid, which of the following is true? a. The volume of the displaced fluid equals the volume of the object. b. The density of the fluid equals the density of the object. c.

What is the force of attraction between oppositely charged ions

Greenhouse effect in a sentence and word to study

Are rocks on Earth's surface stable? What might cause rocks to change? Explain your reasoning.

Calculate ∆h0 for the following reaction. br2 ( g. → br2 (l) ∆hf0 br2 ( g. = 30.91 kj/mol; ∆hf0 br2 (l) = 0 kj/mol)

Ethyl alcohol has a latent heat of vaporization of 850 J/g. Water has a latent heat of vaporization of 2260 J/g. Container A contains 1.0 kg of ethyl alcohol. Container B contains 1.0 kg of water. Both liquids are brought to a boil.

The greatest composition by mass in an atom 17/8 O is due to the total mass of its

1. What is the criteria' for designating an object an asteroid?

Extend E1 Explain why the arrangement, movement and energy of particles change during changes of state.