How much methanol (CH_(3)OH, in grams) can be formed from 43.2 g of hydrogen? Assume excess CO. CO(g)+2H_(2)(g)arrow CH_(3)OH(g) square gCH_(3)OH
True or false Elements on the left side of a period are metals because of the tendency to want to gain electrons. (Do not consider hydrogen.) True False
Chemical services should not be performed on hair that has been colored with any of the following products EXCEPT Select one a. henna b. metallic dyes c. compound dyes d. weekly rinses
2A reaction with ammonium sulfate. molecular equation complete ionic equation net ionic equation
Calculate the molar solubility (mol/L) of PbCrO_(4).K_(sp)=1.8times 10^-14 Type answer: square
Calculate the pH of an acid solution containing 0.044 m HNO_(3) 12.64 2.81 1.36 0.044 none of these
7. Write Lewis structures and determine the molecular geometries for the following molecules: 10 points a) PCl_(5) b) XeF_(2)
Consider the following reaction and the corresponding data: N_(2)(g)+3H_(2)(g)arrow 2NH_(3)(g) S^circ (N_(2))=192J/molK Delta H_(f)^circ (NH_(3))=-46kJ/mol S^circ (H_(2))=121J/molK S^circ (NH_(3))=193J/molK What is Delta G_(rxn) at 298 K?
4NH_(3)+3O_(2)arrow 2N_(2)+6H_(2)O Identify the element that gets reduced. hydrogen nitrogen oxygen Identify the element that gets oxidized. nitrogen oxygen hydrogen
What is the Delta S_(rxn) for the combustion of 1 mole of C(s) based on the reaction below? C(s)+O_(2)(g)arrow CO_(2)(g) Delta S^circ (C)=2J/molK;Delta S^circ (O_(2))=205J/molK;Delta S^circ (CO_(2))=213.74J/molK
Question 4(Multiple Choice Worth 4 points) (01.06 MC) Water is a pure substance. Which of the following is true about water? A chemical change is required to separate the elements present in it. A physical change is required to separate the elements present in it. It is made up of two compounds, each with a different set of atoms. It is made up of an element and a compound.
Magnesium reacts with oxygen gas to produce magnesium oxide, light and heat. This reaction is a combination reaction. a catalysis reaction. a decomposition reaction. a double replacement reaction. a single replacement reaction.
One mol of particles of any substance contains how many particles? $6.022\times 10^{-23}$ $6.022\times 10^{23}$ $3\times 10^{-10}$ $10^{6}$ $3\times 10^{10}$
Which is the correct electron configuration for aluminum? A $1s^{2}2s^{2}2p^{6}3s^{3}$ B $1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}$ C $1s^{2}2s^{2}2p^{1}$ D $1s^{2}2s^{2}3s^{2}3p^{1}$
Elements in Group 2 are classified as alkali metals. A True B False
Aluminum-27 combines with a neutron to produce a proton and a nuclide. Identify the balanced nuclear equation for this scenario. ${}_{13}^{27}Al+_{0}^{1}n\rightarrow _{1}^{1}p+_{12}^{25}Mg$ ${}_{13}^{27}Al+_{0}^{1}n\rightarrow _{1}^{1}p+_{14}^{29}Si$ ${}_{13}^{27}Al+_{0}^{1}n\rightarrow _{1}^{1}p+_{12}^{27}Mg$ ${}_{13}^{27}Al+_{1}^{1}p\rightarrow _{0}^{1}n+_{14}^{27}Si$
11. Given the word equation: $sodium\quad chlorate\rightarrow sodium\quad chloride\quad +\quad oxygen$ Which type of chemical reaction is represented by this equation? A) double replacement B) single replacement c decomposition D) synthesis
Equations Write a chemical equation for each of the following combinations of known solutions. Balance each equation. Use the symbol (s) after each insoluble compound and (aq) after each soluble one. $HCl(aq)+Pb(NO_{3})_{2}(aq)\rightarrow $ $NaOH(aq)+Co(NO_{3})_{2}(aq)\rightarrow $ $K_{2}SO_{4}(aq)+BaCl_{2}(aq)\rightarrow $ $Pb(NO_{3})_{2}(aq)+BaCl_{2}(aq)\rightarrow $
Use values of $\Delta G_{f}^{\circ }$ from the appendix of your textbook to determine $\Delta G_{r\times n}^{\circ }$ for the following balanced chemical equation. $2NH_{3}(g)+2H_{2}O(g)\rightarrow 2NO(g)+5H_{2}(g)$ $\Delta G_{rxn}^{\circ }=\square kJ$
Which of the following is an example of a physical change? grinding coffee beans baking cake converting water to hydrogen and oxygen digesting a cheeseburger
