What does the period number tell about the energy levels occupied by electrons in an atom?

Explain ph valore through testing

40.0 mL of 0.300 M NaOH are mixed with 40.0 mL of 0.300 M HBr in a calorimeter. The temperature increases from 25.00 °C to 27.00 °C. Assume that the specific heat of the solution is the same as that of pure water (4.

The water in a 2500-L aquarium contains 1.25 g of copper. Calculate the concentration of copper in the water in ppm (remember 1 L H2O=1 kg).

What is not true of a strong acid? A. It is a strong electrolyte B. It always has a concentration above 1.0 M C. It ionizes well in water D. It conducts electricity in solution

What does the p mean in 1s22s22p63s1?

Calculate the molarity of the solution. 29 g of NaCl (g. f. w. = 58.5 g/mol) in 0.030 liters. 0.015 M 17 M 67 M

How can scientists study the composition of distant stars?

When an ionic compound such as sodium chloride (NaCl) is placed in water, the component atoms of the NaCl crystal dissociate into individual sodium ions (Na+) and chloride ions (Cl-). In contrast, the atoms of covalently bonded molecules (e. g.

From A complete stop a car reaches a velocity of 280 KM/S east in 7 seconds what is the rate of acceleration? A. 4 KM/S B. 7 KM/S C. 40 KM/S D. 70 KM/S

How sand is deposited along coastline