In the third period of the periodic table, sodium is followed by magnesium, aluminum, silicon, and phosphorus. Which of these elements has the smallest atomic size?

A solution is prepared by dissolving 1.86g of kcl and 8.29g of k2co3 in enough water to make uo the final volume of 500 cm3. What is the concentration of the potassium ion in the solution?

The diagram is a representation of the electron sea model which statement best describes what is happening in this model? A. The electrons are floating to the top of the nuclei of metal atoms. B.

When you increase the volume of a gas what would happen to the pressure

Two compound samples are found to have the same mass percentages of the same elements. what can you conclude about the two samples

What is [H30+] in a solution with a pH of 10.4?

Which of the following combinations of information would allow you to calculate concentration in ppmv? Check all that apply.

The reaction between iron (II) oxide and carbon monoxide produces iron and carbon dioxide. How many moles of iron can be obtained when 4.754.75 mol FeOFeO reacts with an excess of COCO

Suppose on an average day air contains 6.5 mg of carbon monoxide per 1000 m 3 3 of air. How many milligrams of carbon monoxide are in a room measuring 10 ft x 10 ft x 10 ft? (1m = 3.28 ft). Do not use scientific notation.

Chlorine is used to disinfect swimming pools. The accepted concentration for this purpose is 1 ppm chlorine, or 1 g of chlorine per million grams of water.

Consider this reaction mechanism: Step 1: Mo (CO), Mo (CO) 3 + CO Step 2: Mo (CO) 3 + P (CH3) 3 + Mo (CO) P (CH3) 3 Which of these is an intermediate? o Mo (CO) 6 O Mo (CO) 5 о со o P (CH3) 3