An atom has 25 protons, 20 neutrons, and 19 electrons. Which atom is this, What is the atom's mass number?

Which jet stream affects weather in the US a.) the northern subtropical jet stream b.) the southern subtropical jet stream c.) the northern midlatitude jet stream d.) southern midlatitude jet stream

If you had a substance that water will not dissolve, then which of the following compounds would you choose to dissolve this substance? A. Vegetable oil B. Any polar substance C. Any ionic substance. D. None of the above will work.

What mass of water is produced from the complete combustion of 7.10*10-3 g of methane? Express your answer with the appropriate units.

The specific heat of gold is 0.031 calories/gram C. If 10.0 grams of gold were heated and the temperature of the sample changed 20.0C, how many calories of heat energy were absorbed by the sample?

Imagine you are on the top of a mountain with four basketballs. The mass of the four basketballs are 100 kilograms, 200 kilograms, 300 kilograms, and 400 kilograms.

Is argon long hand or noble gas

Lithium, beryllium, and boron are elements with atomic number 3, 4, and 5, respectively. Even though they are three of the five simplest elements, why are they rare compared to many heavier elements?

What is the formula equation for: Copper (II) Sulfate Pentahydrate - > Copper (II) Sulfate + Water?

what combination will result in a acidic solution? a reaction of strong acid and strong base b reaction of strong acid and weak base c a reaction of weak acid and strong base d reaction of weak acid and weak base

How many moles of sucrose (C12 H12 O11) would be in 7.1 liters of a 0.93 molarity solution of sucrose?