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
Jlenok [28]
2 years ago
6

You want to place a piece of glass tubing into a ruber stopper after the tubing has been fire polished and cooled. This is best

done by
Chemistry
1 answer:
igor_vitrenko [27]2 years ago
4 0

Answer:

All of the above

Explanation:

This is correct

You might be interested in
Why is heat needed to get a reaction to occur
Ahat [919]

Answer:As temperature increases, reactions take place. Generally, higher temperatures mean faster reaction rates; as molecules move about more quickly, reactant molecules are more likely to interact, forming products.

Explanation:

4 0
3 years ago
Read 2 more answers
Which is composed of alkynes?
telo118 [61]
The correct answer is letter (A) Acetylene. Acetylene is the most simplest form of alkyne and at the same time a hydrocarbon. It is unsaturated because of the presence of only two carbon atoms that are bonded together in a triple bond. I<span>n its pure, it is unstable and thus, it is usually held and handled as a solution.</span>
4 0
3 years ago
Read 2 more answers
POS MOLECULES SPEED UP WHEN ENERGY IS CREATED AND SLOW DOWN WHEN ENERGY IS DESTROYED True False? explain why​
Colt1911 [192]

Answer: Scientists use the term bioenergetics to describe the concept of energy flow (Figure 4.2) through living systems, such as cells. Cellular processes such as the building and breaking down of complex molecules occur through stepwise chemical reactions. Some of these chemical reactions are spontaneous and release energy, whereas others require energy to proceed. Just as living things must continually consume food to replenish their energy supplies, cells must continually produce more energy to replenish that used by the many energy-requiring chemical reactions that constantly take place. Together, all of the chemical reactions that take place inside cells, including those that consume or generate energy, are referred to as the cell’s metabolism.

5 0
2 years ago
When 2 moles of Fe(s) react with Cl2(g) to form FeCl3(s) according to the following equation, 799 kJ of energy are evolved.
GenaCL600 [577]

Answer:

1. Exothermic.

2. -1598 kJ.

Explanation:

Hello!

1. In this case, according to the reaction, we can infer that 799 kJ of energy are evolved (given off, released) it means that the enthalpy of reaction is negative as the reactants have more energy than the products; which means this is an exothermic reaction.

2. Here, as we know that the enthalpy of reaction is -799 kJ/mol, we can compute the q-value as shown below, considering the reacted 2 moles of solid iron:

q=2mol*-799 kJ/mol\\\\q=-1598kJ

Which means that 1598 kJ of energy are evolved when 2 moles of solid iron react.

Best regards!

4 0
3 years ago
A sample of iron has the dimensions of 2 cm x 3 cm x 2 cm. If the mass of this
77julia77 [94]

Answer: Volume iron = 2 x 3 x 2 => 12 cm³

Mass = 94 g

D = m / V

D = 94 / 12

D = 7.833 g/cm³

Explanation:

5 0
3 years ago
Other questions:
  • What is the difference between "4 P" and "P4"? A) There is no difference, they both represent the same thing. B) 4 P represents
    9·1 answer
  • Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: ,
    6·1 answer
  • Why is it more accurate to say that the concentration of a solution of acetic acid is 0.01 f rather than 0.01 m?
    9·2 answers
  • The gas left in a used aerosol can is at a pressure of 103 kPa at 25.0 °C. If the can heats up to 50.0 °C, what is the pressure
    13·1 answer
  • How have new technologies made it easier for scientists around the world to share ideas with each other?
    10·1 answer
  • Explain the relationship between heat and thermal energy
    7·2 answers
  • Are single called bacteria
    5·2 answers
  • What would happen if a person was not able to control his or her internal temperature? the person would start shivering
    13·2 answers
  • Which changes would cause an increase in the resistance of a wire? Check all that apply.
    5·2 answers
  • The NH₄⁺ ion forms acidic solutions, and the CH₃COO⁻ ion forms basic solutions. However, a solution of ammonium acetate is almos
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!