Question 1 a sample of 0.255 mole of gas has a volume of 748 ml at 28°c. calculate the pressure of this gas. (r = 0.0821 l ∙ atm / mol ∙ k) 0.784 atm 8.42 atm 0.00842 atm 7.84 * 10-4 atm none of the above

Name three characteristics of nonmetals.

Which factors have the greatest effect on the rate of a chemical reaction between AgNO3 (aq) and Cu (s) ?

Chemistry LA What is the molar mass of carbon dioxide (CO) ? 44.01 g/mol 15.99 g/mol 12.01 g/mol 32.00 g/mol

From the following pairs of coordination complexes, identify the one that is a pair of coordination isomers (aka ionization isomers). a. Na2[NiBr2Cl2] and K2[NiBr2Cl2] b. [Ni (NH3) 3Br]Cl and [Ni (NH3) 3Cl]Br c.

Physical properties of toothpaste

Given that the molar mass of NaCl is 58.44 g/mol, what is the molarity of a solution that contains 87.75 g of NaCl in 500. mL of solution? moles of solute Use molarity - liters of solution

What are 3 ways to seperate metal particles and salt

Sarah heated some orange coloured crystals in a test tube. The crystals turned green and fizzed. After the fizzing stopped, the test tube was allowed to cool. A green powder was left in the tube.

In which orbital does an electron in a bromine atom experience the greatest effective nuclear charge?

Kool-Aid is made up of sugar (C6H12O6), food coloring, and water. It is an example of a (n) element heterogeneous mixture homogeneous mixture compound