How is energy changing when a match burns? Mechanical energy changes to heat energy and friction. Heat energy changes to chemical and light energy. Light energy changes to heat and chemical energy. Chemical energy changes to light

According to Bonsted-Lowery theory, acid base reactions can be considered as proton transfer reactions. A True B False

How many unpair electrons are in an atom of Co in its ground state? 7 1 0 3

6. How many mols of $CO_{2}$ are formed with 4.87 grams of baking soda? Click on the letter in the formula to insert a number. $[A]x\frac {[A]}{[A]}\times \frac {[C]}{[D]}\times \frac {[D]}{[C]}=$

Fire is rapid oxidation, and an explosion is __ A) Always illegal B) Important C) A very rapid fire D) Unavoidable

15. What is the concentration of HCl $(M)$ in water if the solution is $36.0\% $ HCl by mass and has a density of $1.18g/mL$ A. 0.116 M B. 0.360 M C. 8.25 M D. 11.6 M E. 36.0 M

Which pair has the same empirical formula? $CH_{4}$ and $C_{2}H_{6}$ $NaCrO_{4}$ and $Na_{2}Cr_{2}O_{7}$ $C_{3}H_{6}O_{3}$ and $C_{2}H_{6}O_{2}$ $C_{2}H_{4}O_{2}$ and $C_{6}H_{12}O_{6}$

The hybrid orbital set used by the central atom in $NCl_{3}$ is __ sp3 sp sp2 sp3d sp3d2

c. If a bronze statue grows darker in color over time, what color do you think tin oxide (SnO) is?

Multiple Choice 2 points A chemical reaction in which a larger molecule is built from smaller molecules is a(n) catabolic reaction. C synthesis reaction. exchange reaction. decomposition reaction.

e. How many molecules are in 48.0 grams of NaOH? f. How many grams are in $4.63\times 10^{24}$ moles of $CCl_{4}$