Joseph divides 8.64 by 2.0. How many significant figures should his answer have?

one

two

three

five

Explain different ways you could increase the reaction rate, and/or decrease the reaction rate

The symbol, Mg (s), shows magnesium in its standard state. True or False?

What can be made in a field or laboratory

Classify each of the following as an exothermic or endothermic reaction: 1) 2H2 (g) + O2 (g) ⟶Δ2H2O (g) + 483.6kJ 2) 6CO2 (g) + 6H2O (l) + 15000kJ⟶C6H12O6 (aq) + 6O2 (g) 3) 2Al (s) + Fe2O3 (s) ⟶Al2O3 (s) + 2Fe (s) + 850kJ

An object exerts 140 N of force on a surface that has an area of 2.0 m2. How much pressure does the object exert?

Are specimens the best source of DNA

Given the solubility, calculate the solubility product constant (ksp) of each salt at 25°c: (a) ag2so3, s = 4.6 * 10-3 g/l; (b) hg2i2, s = 1.5 * 10-7 g/l; (c) zn3 (po4) 2, s = 5.9 * 10-5 g/l.

Why does ionization energy tend to increase as you move across a period

Why does the rate of a reaction generally increase with increased temperature? (Choose all that apply) A. at higher temperatures, molecules are more likely to collide with each other in the correct orientation. B.

What is the wavelength of microwaves of 3.0x109 Hz frequency? c = 3.0x108 m/sec