13. How many neutrons are in this isotope? (}_{9)^19F Type a response
Uses organic acid salts that are not abrasive to water pumps, but provide the correct pH Select one: A. Orange Coolant B. Hybrid Organic Acid Technology C. Inorganic Acid Technology D. DEX-COOL
In general, how many unit factors are required to solve a mass-volume stoichiometry problem? one C two three four none of the above
In general, how many unit factors are required to solve a mass mass stoichiometry problem? one two three four none of the above
It is possible to find these four things on GHS a chemical label. 1. product identifier 2. pictograms 3. hazard statements 4. signal word True False
Why is it important to know the number of valence electrons of an atom? Nuclear Atomic Mass Isotopes Bonding
How many formula units are present in 872 grams of lead (IV)carbonate?
Which of these safety rules is MOST important to remember in chemistry class? (Hint...think about lab rules from brick and mortar classes and what would keep you safe!) Wear closed-toe shoes and goggles when needed Run to your lab station to be first Bring your lunch into the lab for long experiments Always taste chemicals to identify them
What's the best definition of chemistry? The study of matter and the changes it undergoes The study of the Earth and its processes The study of living organisms The study of stars and planets
Which instrument is used for holding, mixing, and heating small amounts of substances Pipette Test Tube Secchi Disc Graduated Cylinder
A solution is made with 100 milliliters of water, how much solute will dissolve if 200 milliliters is used by the student at the next table? Half as much solid can dissolve in the 200 mL One-fourth as much solid can dissolve in the 200 mL Twice as much solute can dissolve in 200 mL The same amount will dissolve in 200 mL as what dissolved in 100 mL
Which of the following represents a covalent molecule? SELECT ALL THAT APPLY a $CO_{2}$ b $Cl_{2}$ C He d $O_{2}$
Div 5. Calculate the number of moles in 18.0 g of sodium chloride (NaCl). 0.31 mole 1044 moles 3.2 moles 18 moles
Which noble gas does not possess a true octet? a helium b xenon c radon d argon
When the following equation is balanced, what is the sum of the coefficients? $\underline {\quad }C_{2}H_{4}+\underline {\quad }O_{2}\rightarrow \underline {\quad }CO_{2}+\underline {\quad }H_{2}O$ 11 7 6 8
Rost Lab: Single-Replacement Reactions occur when a more reactive element displaces a less reactive element compound. There is a table on the back of your periodic table labeled "Activity Series". Higher elements are more elements on the table In other words elements higher on the Activity series will replace elements lower in the seri elements will not replace higher elements. The speed and energy of the reaction is directly proportional to the dis two elements on the series. 3. Balance the following equations. a. $\underline {\quad }F_{2}+\underline {\quad }NaCl\rightarrow \underline {\quad }Cl_{2}+\underline {\quad }NaF$ b. $\underline {\quad }Li+\underline {\quad }MgCO_{3}\rightarrow \underline {\quad }Mg+\underline {\quad }Li_{2}CO_{3}$ c. $\underline {\quad }K\quad +\underline {\quad }Al(OH)_{3}\rightarrow \underline {\quad }Al\quad +\underline {\quad }KOH$ d. $\underline {\quad }Br_{2}+\underline {\quad }CaCl_{2}\rightarrow \underline {\quad }Cl_{2}+\underline {\quad }CaBr_{2}$ e. $\underline {\quad }Zn+\underline {\quad }Cu_{3}(PO_{4})2\rightarrow \underline {\quad }Cu+\underline {\quad }Zn_{3}(PO_{4})_{2}$
Predict the products of the reaction below $Mg+Cu(NO_{3})_{2}\rightarrow \underline {\quad }+\underline {\quad }$ $Cu+Mg(NO_{3})_{2}$ $Cu+MgNO_{3}$ $CuMg+NO_{3}$ $Mg_{2}NO_{3}+Cu$
A chemical substance that is present at the start of a chemical reaction Exothermic Enzyme activation energy Reactant
A solution contains 803.92 milligrams of glucose per 100 ml sample. The molar mass of glucose is $180.15g/mol$ What is the molarity of glucose in the sample? $\square $
3. What is the percent composition of $CO_{2}$
