Which of the following is the general format for a double displacement reaction? A + BX AX + B A + B AB AB A + B AX + BY AY + BX

Ia a iron nail a physical state

Explain how a mummy decreases in mass from 200 to 170 kg

6.7 mL of a ptassium chlorid solution was added to a 54.730 gevaporating dish. The combination weight 61.945 g. Afterevaporation the dish contents weight 55.428 g. a. What was the mass percent of potassium chloride in thesolution? b.

What is the most important change in a chemical change? 1) identity 2) shape 3) size 4) form 5) state

The pH of a 0.25 M aqueous solution of hydrofluoric acid, HF, at 25.0 °C is 2.03. What is the value of Ka for HF? 6.0 * 10-5 3.5 * 10-4 1.1 * 10-9 2.0 * 10-9 none of the above

An atom of element A has 108 protons. What would the elements atomic number be?

What is a scientific variable

What kind of reactions are redox reactions a. reactions involving substituting different isotopes b. reactions involving losing and gaining electrons c. reactions involving protons transferring between atoms d.

Determine the number of atoms in 1.75 ml of mercury. (the density of mercury is 13.5 g/ml.)

In the reaction A + B + C >> D, what are the products? A. C and D B. A and B C. A, B, C, and D D. A and C