Golng from a liquid to a vapor or from a vapor to a liquid is called __ temperature change pressure change phase change
How many grams of copper(II) sulfate (CuSO_(4)(159.609g/mol)) are contained in 87,0 mL of a1.4M solution? C 1.9times 10^4g 199 2.6times 10^3g 2.69
Write the acidic ionization equation for NH_(4)^+ Be sure to include the proper phases for all species within the reaction.
INGREDIENTS You'll find this ingredient in our guacamole , white rice, and most of our salsas. CILANTRO ARTIFICIAL PRESERVATIVES ARTIFICIAL . COLORS
How many grams of PbSO_(4) would be produced from the complete reaction of 23.6gPbO_(2) ? Pb+PbO_(2)+2H_(2)SO_(4)arrow 2PbSO_(4)+2H_(2)O PbO_(2):239.2g/mol PbSO_(4):303.27g/mol [?]gPbSO_(4)
How do the atomic mass and atomic number compare for helium? The atomic mass and atomic number are equal. The atomic mass is greater. Helium does not have an atomic number. The atomic number is greater.
1. What does a Lewis dot diagram of an atom represent? all electrons valence electrons protons neutrons
Which of the following questions does a SDS answer? A What is the material and what are its hazards? B What should I do if a problem occurs when working with this material? C What precautions should I take to prevent problems when using this chemical? D All the above.
The SDS section on "extinguishing media" tells you what type of fire extinguisher to use for fires involving the chemical. A True B False
What types of chemical bonds hold water (H2O) molecules together ionic bonds hydrogen bonds
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 $CO_{2}$
