Question 17 The atomic mass of an element is determined by the number of protons and neutrons contained in the nucleus. changes after each reaction. equals the number of protons plus the number of electrons. depends on the number of electrons in the outermost shell. equals the number of neutrons. Question 18 Isotopes are: charged ions. locations of electrons in atoms. atoms of the same element that differ in the number of neutrons. atoms of the same element that differ in the number of electrons. Question 19 What are charged particles that form when electrons are transferred from one atom to another? Atoms Elements Molecules lons Question 20 2 pts 2 pts 2 pts

3. balance the equation below and answer the question \( \rightarrow \mathrm{Fe}+\mathrm{O}_{2} \rightarrow \mathrm{Fe}_{8} \mathrm{O}_{3} \) How many grams of \( \mathrm{Fe}_{8} \mathrm{O}_{3} \) are produced when \( 2.54 \times 10^{21} \) molecules of \( \mathrm{O}_{8} \) are reacted? \[ \begin{array}{l} \mathrm{Fe}+\mathrm{O}_{2} \rightarrow \mathrm{Fe}_{8} \mathrm{O}_{3} \\ 4 \mathrm{Fe}+\mathrm{O}_{2} \rightarrow 2 \mathrm{Fe}_{2} \mathrm{O}_{3} \end{array} \] \( 2.54 \times 10^{21} \) molecules \( \mathrm{O}_{2} \times \)

Suppose a 250. mL flask is filled with 1.1 mol of $NO_{2}$ 0.80 mol of CO and 1.6 mol of NO The following reaction becomes possible: $NO_{2}(g)+CO(g)\rightleftharpoons NO(g)+CO_{2}(g)$ The equilibrium constant K for this reaction is 0.840 at the temperature of the flask. Calculate the equilibrium molarity of NO. Round your answer to two decimal places. $\square $ disappointed $\square $

31. Which of the following factors does NOT affect the rate of a chemical reaction having solid reactants?

Avogadro's law 29 Which one of the following CORRECTLY illustrates the hybridization of orbitals of Be in the molecule $BeCl_{2}$

A chemistry student needs 90.0 g of methyl acetate for an experiment.By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of methyl acetate is $0.934g\cdot cm^{-3}$ Calculate the volume of methyl acetate the student should pour out. Round your answer to 3 significant digits.

33. What is the bond formed between two or more atoms by sharing of electrons?

Precipitation of minerals from a solution occurs when additional pure water is introduced into the solution the solution is too full of ions pressure gets too low rainwater falls into an existing body of water

30. Carbon monoxide is a poisonous gas that is a light blue in color. True False

32. At a particular temperature, the equilibrium constant, $Kc=0.36$ for the reaction $SO_{3}(g)\rightleftharpoons SO_{2}(g)+O_{2}(g)$ In an experiment.1.00 mol of $SO_{3}$ is introduced into a 1.00 L container. It was found that there is 0.50 mol of $SO_{2}$ at equilibrium in the same volume. Which of the following predictions can be drawn from the given data?

acquestions 3-3 you may efther typoyour responses, or handwrite themonaseparate chectof paper and upload a photo whonyou submit the Word clocument to the Canver asslemment. 6. Writefull electron configuration for the following: a. Fluorine b. Iron 7. Write condensed (abbreviated) electron configuration for the following: c. Sn 2. Có 8. Write full oxital electron conflouration for the following: b. Phosphorous