1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kkurt [141]
3 years ago
5

Match each item to its proper disposal method. Answers to be used more than once.

Chemistry
1 answer:
salantis [7]3 years ago
8 0

Answer:

1. a)

2. a)

3. b)

4. d)

Explanation:

The disposal method is how we throw away the wastes. In a chemical lab, the correct disposal method guarantees the security of the environment and the humans and animals that may be in contact with the materials.

So:

1. Excess chemical: Because it can be toxic, it may be disposed of in the appropriate waste container, which will depend on the characteristics of the material;

2. Reaction mixture: As the excess chemical, it can be toxic, so it must be disposed of at an appropriate waste container;

3. Used filter paper: Generally, the solids in the filter paper is not toxic, so it can be thrown away in the trash can;

4. Cracked or chipped beaker: Because the beaker is made of glass, it can cut when broken, so it must go to a broken glass box, that will protect the people that will deal with it.

You might be interested in
Compare the strength of intermolecular forces in no2 to the strength of intermolecular forces in n2
matrenka [14]
N2  is non-polar molecules,
NO2 is polar molecules that have slightly positive charge on N and slightly negative on O, so <span>intermolecular forces are stronger  in NO2</span>
7 0
3 years ago
Read 2 more answers
Measurements show that the energy of a mixture of gaseous reactants decreases by during a certain chemical reaction, which is ca
Serga [27]

Your question is not complete as you have omitted some significant values in the question. Please let me assume this to be your question;

QUESTION;

Understanding the enthalpy definition=

Measurements show that the enthalpy of a mixture of gaseous reactants increases by 125.kJ during a certain chemical reaction, which is carried out at a constant pressure. Furthermore, by carefully monitoring the volume change it is determined that -71.kJ of work is done on the mixture during the reaction. Calculate the change in enthalpy of the gas mixture during the reaction and determine if the reaction is endothermic or exothermic.

ANSWER: The change in enthalpy of the gas mixture during the reaction is 54.kJ

The reaction is endothermic.

EXPLANATION: Enthalpy is the heat change in a system.

To calculate enthalpy we use the formula below;

H = E + PV

H is the enthalpy

E is the energy used in the reaction

PV is the product of pressure and volume which is refered to as the work done in the system

Using the equation above

H = 125 + (-71) = 54.kJ

An endothermic reaction is a type of reaction where heat is gained by the system from it's environment, and the enthalpy of such system is positive. While an Exothermic reaction is a type of reaction where heat is lost by the system to it's environment, and the enthalpy of such system is negative.

Because our enthalpy value is positive, this is an endothermic reaction.

8 0
4 years ago
If the CaCO3 weighed 983 g and the CaO weighed 551 g, how many grams of CO2 were formed in the reaction?
stira [4]

Answer:

The answer to your question is 432 g of CO₂

Explanation:

Data

CaCO₃  = 983 g

CaO = 551 g

CO₂ = ?

Balanced reaction

                               CaCO₃ (s)   ⇒   CaO (s)   +  CO₂ (g)

This reaction is balanced, to solve this problem just remember the Lavoisier Law of conservation of mass that states that the mass of the reactants is equal to the mass of the products.

                    Mass of reactants = Mass of products

                    Mass of CaCO₃   = Mass of CaO + Mass of CO₂

Solve for CO₂

                    Mass of CO₂  = Mass of CaCO₃ - Mass of CaO                    

                     Mass of CO₂ = 983 g - 551 g

Simplification

                     Mass of CO₂ = 432 g                        

         

5 0
3 years ago
???????????????????????
eduard

Answer:

B and D

Explanation:

Bc it has more fat than the other

8 0
3 years ago
How is the name of the second element in a covalent molecule changed
Aleonysh [2.5K]

Answer:

See explanation

Explanation:

Here we are trying to see how a binary covalent compound is named. A binary covalent compound comprises of only two elements held together by covalent bonds.

The first element retains its normal name whereas the second element has the suffix -ide added to it.

For instance, CO2 is named as carbon dioxide, HBr is named as hydrogen bromide etc.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following statements is true concerning a heating curve?
    11·1 answer
  • A bicycle rider travels 50.0km in 2.5 hours.what is the cyclist average speed
    5·1 answer
  • An exothermic reaction occurs spontaneously ,why?​
    15·1 answer
  • When we have two sorted lists of numbers in non-descending order, and we need to merge them into one sorted list, we can simply
    5·1 answer
  • Water flows through the body of the sponge in the direction the arrow points in this illustration. How does water move through a
    5·2 answers
  • The metalloid that has three valence electrons is .
    12·2 answers
  • Need organic chemistry 11th grade <br><br>for practice and 1 question is enough :)<br>​
    12·1 answer
  • What is the specific heat of ethanol if 4650 j are required to raise the temperature of 250.0g of ethanol from 22.0oc to 29.6 de
    9·1 answer
  • Hich formula can be used to calculate the molar mass of hydrogen peroxide (H2O2)? (5 points)
    7·2 answers
  • N2 + 3H2 → 2NH3 △H = -92 kJ / mol
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!