How many molecules of he are contained in a 10.0 l tank at 7.53 atm and 485 k?

Which phrase is an example of what electrostatic forces hold together? A. Fr atoms and localized in iron B. He atoms in helium gas C. oxygen and hydrogen atoms in OH- D. Na + and Br - in NaBr I'm not sure about this one.

What is a chemical equation that shows the same number of each kind of atom on both sides of the equation called? a replacement reaction unbalanced an incomplete reaction balanced

What is the primary function of decomposers in an ecosystem?

A certain ore is 33.0% nickel by mass. How many kilograms of this ore would you need to dig up to have 25.0 g of nickel?

2H2S (g) + 3O (g) + 2SO2 (g). How many miles of sulfur dioxide are produced from 7.1 miles of oxygen

How many moles of neon (Ne, 20.179 g/mol) are in 68.4 grams of neon

A 50.00 mL sample of groundwater is titrated with 0.0300 M EDTA. Of 12.40 mL of EDTA is required to titrate the 50.00 mL sample, what is the hardness of the groundwater in molarity and in parts per million of CaCO 3 by mass

Why openness is important to the progress of science?

At a certain temperature the rate of this reaction is second order in NH4OH with a rate constant of 34.1 M^-1s^-1: Suppose a vessel contains NH4OH at a concentration of 0.100M.

If you go into the lab and dissolve 2.11 g of magnesium chloride in enough water to make 1500 ml of solution, what is the molarity of the resulting solution?