How many shells are occupied in atoms of elements in period 4?

If 45.0 grams of solute was dissolved to produce a 30.0 % by mass solution, determine the mass of the solvent alone.

How many significant figures should be written in the sum 4.56 g + 9.032 g + 580.0078 g + 540.439 g? a. 3 b. 4 c. 5 d. 6 e. 7?

Daisy's dad has a mass is 70 kg, which is twice Daisy's mass. What is his weight? (Note, be sure to write in the unit. The unit is N)

A gene or trait that appears or expresses itself over a recessive trait is called an?

A sample of hydrogen gas at a temperature of 40 k changes its volume from 50 liters to 30 liters. what is the new temperature after the reduction in volume?

Which of the following elements has the lowest ionization energy? Rb Sr Cs Ba Xe

Which is a diatomic molecule? Select one: a. CH4 b. H2O c. O2 d. N

Everyone reacts to stress in the same way.

What is the molarity of a solution made by dissolving 29.5 g of sodium hydroxide (NaOH) in enough water to make 2.45 L of solution? Molar Mass Na: 22.99 g/mol Molar Mass O: 16.00 g/mol Molar Mass H: 1.008 g/mol

Is romano cheese an element, compound, homogeneous mixture, or heterogeneous mixture?