Which of the following substances would make a firework explode with a greenish flame? Copper (II) Chloride Copper (I) Chloride Copper (II) Oxide All of them

Why is it important to use demineralized water? a) Because demineralized water has a lower density than regular tap-water b) Because demineralized water doesn't contain minerals c) Because demineralized water poses less of a health hazard in chemical laboratories d) Because demineralized water has a higher boiling point than regular tap-water

Question Give the chemical formula of the alcohol that results from the reduction of n-pentanoic acid. Provide your answer below:

What is the correct formula that would result from the combination of the two ionic species? $NH_{4}^{+}$ and $SO_{4}^{2-}$ $SO_{4}(NH_{4})_{2}$ $NH_{4}SO_{4}$ $(NH_{4})_{2}SO_{4}$ $NH_{4}(SO_{4})_{2}$

How many moles of NaOH are needed to neutralize 15.0 mL of 0.235 M HCl solution? Hints: Don't forget to write the equation, balance it, and make sure units of volume are consistant 0.00353 moles 35.3 moles 0.235 moles 3.53 moles 23.5 moles 2.35 moles

Which of the following would not be a strong base? You may select more than one answer. $Mg(OH)_{2}$ $NH_{3}$ $Be(OH)_{2}$ $Ca(OH)_{2}$

If flammable liquids are on fire, which class of fire extinguisher would you need to put out the fire? A Class B B Class C C Class D D Both B and C

How many moles of KCl are needed to prepare 750 mL of solution given the concentration $1.5mol/L$ 1.5 mol/L (Molarity) A 500 moles B 1.125 moles C 2 moles D 1125 moles

What is the degree of unsaturation for the following compound? $C_{10}H_{14}N_{2}$ $\square $

The energy content of food is typically determined using a bomb calorimeter. Consider the combustion of a $0.46-g$ sample of butter in a bomb calorimeter having a heat capacity of $2.67kJ/^{\circ }C.$ If the temperature of the calorimeter increases from $23.5^{\circ }C$ to $28.5^{\circ }C,$ calculate the energy of combustion per gram of butter. $Energy\quad of\quad combustion=\square kJ/g$

Which statement correctly describes a chemical reaction? Energy is always released. Bonds between atoms break and reform. Products go into a reaction. Reactants come out of a reaction.