duncanje5783
05.07.2019 •
Chemistry
Question 8 unsaved mrs. johnson's science class perform an experiment. they combine two substances that react with lots of fizzing and bubbling. the class determines the mass of the substances before and after the experiment and find that the substances have less mass after the experiment. hannah wants to know why the experiment didn't obey the law of conservation of mass, but chris says it did. who is right and why? question 8 options: chris is correct because the reactants and products do not have to have the same mass, but they do have to weigh the same. chris is right because some of the mass of the reactants escaped as gas. hannah is right because the class may have made an error in determining the mass of the substances. hannah is right because the mass of the reactants was different than the mass of the products.
Solved
Show answers
More tips
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
- H Health and Medicine Kinesiology: What is it and How Does it Work?...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
- H Health and Medicine How to perform artificial respiration?...
Answers on questions: Chemistry
- C Chemistry This is me eating alex s noods....
- C Chemistry A.Blood is thicker than water.B.Is not...
- C Chemistry What ratio of plants in the offspring would you predict from a Yy x Yy cross...
- C Chemistry Which argument is correct about the growth of an organism? Only genetic factors affect the growth of an organism. Only genetic factors affect the growth of an organism. Only...
- C Chemistry Chemical Equations :p...
- C Chemistry A sample of a compound contains 3.21 g of sulfur and 11.4 g of fluorine. What is the empirical formula of the compound?...
- C Chemistry Who wants to know some te?...
- M Mathematics If i buy 3.5 meters of ribbon how many laces can i make if i need 15.5 cm per each lace...
- M Mathematics Asurvey found that women s heights are normally distributed with mean 63.6 in and standard deviation 2.3 in. a branch of the military requires women s heights to be between...
- M Mathematics Apipe has an initial radius of .07 meters, which then changes to a radius of .01 meters . the velocity of the water in the initial part of the pipe is .25 m/s. the segment...
Ответ:
Chris is right because some of the mass of the reactants escaped as gas.
Explanation:
The law of conservation of mass is a universal law: it is obeyed always.
Since when the two substances were combined they reacted with lots of fizzing and bubbling, it is clear that some gas was formed. This is, one or more products were in the form of gas.
In this case, the law of conservation of mass leads to the conclusion that part of the original mass contained in the reactant substances ended in the products that escaped as gas.
In fact, if all the measurements were made carefully, the difference of the masses before and after the reaction corresponds exactly to the mass of the products that evolved as gas and were not collected. This is, the law of conservation of mass permits to calculate the mass of the gaseous products that couldn't be directed determined because the gases were not confined inside the walls of a vessel.
Ответ:
Chris is right because some of the mass of the reactants escaped as gas.
During the experiment, they combine two substances that react with lots of fizzing and bubbling. The fizzing and bubbling mean that a gas is created from the substances. As the gas is not captured to determine its mass, the total mass after experiment is less.
Ответ: