CHEM 101L

CHEM 101L QUESTIONS AND ANSWERS If the balanced equation for the reaction of magnesium hydroxide with hydrochloric acid is: 2 HCl (aq) + Mg(OH)2 (s) —►MgCl2 (aq) +2 H2O (l) How many moles of MgCl2 can be produced when an antacid containing 6.750x102 mg of magnesium hydroxide is completely neutralized by HCl? (Mg(OH)2 MW = 58.3197 g/mol) 0.01157 mol An antacid sample contains 0.0350 moles of magnesium hydroxide. 0.0500 moles of hydrochloric acid are added. Which chemical species would yo...

CHEM 101L QUESTIONS AND ANSWERS when should you not wear gloves in the laboratory setting? when using your laptop, opening the door what should you do if you get solution on your gloves and up your arm notify the TA, rinse arm under distilled water for at least 15 min when is it acceptable to eat at the lab bench? NEVER! if you are hypoglycemic take your snack outside of the lab define accuracy How close data measurements are from the accepted or "true" value. define precisi...

A physical property that depends on only the type of material and not on how much of that material that you have is known as Select one: a. Inheritable property b. Intensive property c. Extensive property d. Exhausted property True or false: If you are changing a larger unit into a smaller unit, like cm into mm, the decimal is moved to the right because you are multiplying by a power of ten Select one: a. True b. False The metric system is based upon Select one: a. Multiples of 1 ...

In the case of an acid spill, what should you do first? Select one: a. use a rag to soak up the acid b. pour vinegar on the acid c. dilute the acid with water before soaking it up d. pour baking soda on the acid The following is part of the lab safety rules: It's not necessary wash hands before entering the lab. Select one: True False All of the following safety tips are true EXCEPT Select one: a. All chemical in the laboratory should be considered hazardous b. Always put lids bac...