Which is another term for petroleum? A. Carbon dioxide B. Natural gas C. Oil D. Coal
The symbol "mg'means what? minigrams milliliters milligram microgram
Scientific Method An experiment is carried out to determine if the boiling point of distilled water is affected by the addition of different types of solutes. Describe a control group for this experiment.
What type of chemicals (agent)are in multipurpose dry chemical extinguishers? A. Dry powder B. Ammonium phosphate C. Sodium bicarbonate D. Potassium bicarbonate
Which of the following is a molecule? A) carbon B) carbon dioxide C) sugar D) salt
In a chemical reaction , which aspect of the reactants changes? (1 point) arrangement of the atoms name of each element nuclei total mass
Which reaction is expected to release the greatest amount of energy? A (}_{0)^1n+_(92)^235Uarrow _(52)^137Te+_(40)^97Zr+2^1n B (}_{1)^1H+_(1)^2Harrow _(2)^3He C (}_{0)^1n+_(92)^235Uarrow _(56)^142Ba+_(36)^91Kr+3_(0)^1n (C) D 2Harrow H_(2)
What is the enthalpy change (Delta HDelta H) for the reaction H_(2)(g)+Cl_(2)(g)arrow 2HCl(g) if the bond energies are: H-H=436kJ/mol Cl-Cl=243kJ/mol H-Cl=431kJ/mol +183kJ/mol -183kJ/mol -862kJ/mol +862kJ/mol
Which of the following ions possess a dipole moment?Check all that apply. IF_(4)^+ IBr_(4)^+ IBr_(2)^+ IBr_(4)^- None of the above
Coefficients in a reaction equation provide the relative numbers of these chemical species. True False
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 $C_{6}H_{12}O_{6}$
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.
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
Multiple Choice 2 points Which of the following substances is an element? salt glucose iron water
Which of the following when mixed at equimolar concentrations, will result in the formation of a buffer solution? HCl and NaOH HClO and NaOH $HClO_{2}$ and $NaClO_{2}$ $HNO_{3}$ and $NaNO_{3}$
Which formula represents a nonpolar molecule containing polar covalent bonds?
