Question

A student carefully measures 12.50 g of reactants and performs a chemical reaction. While collecting the...

A student carefully measures 12.50 g of reactants and performs a chemical reaction. While collecting the products, they knock over their reaction flask. The final mass measured for their products is 10.62 g. Did this student break the law of conservation of mass? Why or why not?

Homework Answers

Answer #1

No.Law of conservation of mass is a fundamental law of science and it can not be violated.Chemical reaction always follow law of conservation of mass.so the mass of reactants should always be equal to the mass of product formed.But in many chemical reactions the side product may be a gas which leaves the reaction vessel if it is not carried out in a closed vessel. So the mass of product will be always less than the mass of reactants.

Hence may be in this case some by product which is a gas have left the flask .

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Prelab Stamp Here Mg(s) +2HCl(aq) --->MgCl2(aq)+H2(g) 2) A student performs this reaction in the laboratory, and...
Prelab Stamp Here Mg(s) +2HCl(aq) --->MgCl2(aq)+H2(g) 2) A student performs this reaction in the laboratory, and collects the hydrogen gas over water. The student collects 215.8 mL of gas. The total pressure is 755.2 mm Hg and a temperature of 22.0 °C. a) What is the vapor pressure of water at 22.0 °C?   b) What is the partial pressure of hydrogen in the tube in mm Hg? in atm? c) Use the ideal gas law to calculate how many moles...
Project 5: Stoichiometry Stoichiometry is the study in which we determine the relative quantities of reactants...
Project 5: Stoichiometry Stoichiometry is the study in which we determine the relative quantities of reactants and products in a balanced chemical equation. The law of conservation of mass states that the mass of all participants in a chemical reaction must remain constant over time. Matter is neither created nor destroyed in a chemical reaction. 1. You have 13 slices of bread and 5 slices of cheese. How many grilled cheese sandwiches can you make? What is the limiting reagent?...
Chemical Reactions Types and Their Equations Making Heat with Chemical Reactions Have you ever wondered how...
Chemical Reactions Types and Their Equations Making Heat with Chemical Reactions Have you ever wondered how an instant heat pack works? A disposable heat pack works by a chemical reaction that combines iron in the package with oxygen from the air when the outer packaging is removed producing iron oxide. You have probably seen the product of this reaction in what is commonly called rust. The reaction releases heat, which allows the pack to reach a sufficient temperature that is...
Procedure Reaction 1: Dissolving the Copper 1. Obtain a clean, dry, glass centrifuge tube. 2. Place...
Procedure Reaction 1: Dissolving the Copper 1. Obtain a clean, dry, glass centrifuge tube. 2. Place a piece of copper wire in a weighing paper, determine the mass of the wire and place it in the centrifuge tube. The copper wire should weigh less than 0.0200 grams. 3. In a fume hood, add seven drops of concentrated nitric acid to the reaction tube so that the copper metal dissolves completely. Describe your observations in the lab report. (Caution, Concentrated nitric...
Sign In INNOVATION Deep Change: How Operational Innovation Can Transform Your Company by Michael Hammer From...
Sign In INNOVATION Deep Change: How Operational Innovation Can Transform Your Company by Michael Hammer From the April 2004 Issue Save Share 8.95 In 1991, Progressive Insurance, an automobile insurer based in Mayfield Village, Ohio, had approximately $1.3 billion in sales. By 2002, that figure had grown to $9.5 billion. What fashionable strategies did Progressive employ to achieve sevenfold growth in just over a decade? Was it positioned in a high-growth industry? Hardly. Auto insurance is a mature, 100-year-old industry...
Delta airlines case study Global strategy. Describe the current global strategy and provide evidence about how...
Delta airlines case study Global strategy. Describe the current global strategy and provide evidence about how the firms resources incompetencies support the given pressures regarding costs and local responsiveness. Describe entry modes have they usually used, and whether they are appropriate for the given strategy. Any key issues in their global strategy? casestudy: Atlanta, June 17, 2014. Sea of Delta employees and their families swarmed between food trucks, amusement park booths, and entertainment venues that were scattered throughout what would...