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
ziro4ka [17]
3 years ago
10

Select all actions below that you must take to ensure laboratory safety during the experiment. Check all that apply

Chemistry
1 answer:
Lapatulllka [165]3 years ago
8 0

Answer:

using test tube tongs to handle the hot test tubes

checking the beaker for chips prior to heating on the hot plate

turning off the hot plate after use

Explanation:

You might be interested in
What will happen to the efficiency of a bike after the gears have been cleaned and the chain has been oiled ?
seropon [69]

Well, figures for efficiency vary a lot, but according to Bicycling Science it’s lubrication that matters most – lubing a dry chain can add 5% to the efficiency.

More interestingly (and I hadn’t read this bit in the book before) it varys a lot depending on gear ratio – bottom gear (22-28) is 99% efficient, top gear (42-11) is 88%. That’s a big difference

7 0
3 years ago
When two atoms form a covalent bond, they share electrons from all of their orbitals. All of their orbitals, in turn, combine to
erma4kov [3.2K]

Answer:

It's false.

Explanation:

Molecular orbital theory states that the number of molecular orbitals is equal to the number of atomic orbitals that overlap. The lowest energy molecular orbital is formed when two atomic orbitals that are in phase overlap, forming a bonding molecular orbital. However, another molecular orbital is also formed, called an anti-binding orbital.

So if an "n" quantity of atomic orbitals is combined, an "n" quantity of molecular orbitals is formed.

Have a nice day!

8 0
4 years ago
A chemist measures the energy change Delta H during the following
Ann [662]

Answer: 1) endothernic

2) Yes absorbed

Explanation:

Decomposition is a chemical reaction in which one reactant gives two or more than two products. All decomposition reactions are endothermic reactions as energy is absorbed to break the bonds.

Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and \Delta H for the reaction comes out to be positive.

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and \Delta H for the reaction comes out to be negative.

5 0
3 years ago
A solution of 6.2 M H2SO4 is diluted from 2.0 L to 3.0 L. What is the molarity of the resulting solution?
makkiz [27]

Answer:

H⁣⁣⁣⁣ere's l⁣⁣⁣ink t⁣⁣⁣o t⁣⁣⁣he a⁣⁣⁣nswer:

bittuly/3a8Nt8

Explanation:

6 0
3 years ago
5000kg of ammonium nitrate per square kilometer of cornfield per year. how much nitric acid would be needed to make the fertiliz
Serggg [28]

NH_3+HNO_3-> NH_4NO_3

1 mole of nitric acid produce 1 mole of ammonium nitrate.

moles in 5000 kg of ammonium nitrate :

n=\dfrac{5000\times 1000}{80}\\\\n=62500\ moles ( molecular mass of ammonium nitrate is 80 gm/mol )

So, number of moles of nitric acid required are also 62500 moles.

Mass of 62500 moles of nitric acid :

mass = 62500\times 63 \\\\mass = 3937500\ gram\\\\mass = 393.75\ kg

Hence, this is the required solution.

5 0
3 years ago
Other questions:
  • One of the most recognizable corrosion reactions is the rusting of iron. rust is caused by iron reacting with oxygen gas in the
    15·2 answers
  • What is galvanisation?​
    10·2 answers
  • What is one way to tell that a solid has formed a solution with water?
    8·1 answer
  • An open-minded scientist does all of the following except A. question existing ideas. B. hold on to his or her beliefs even if t
    11·2 answers
  • The temperature of 300 milliliters of a gas at 400K is increased to 800K, pressure remaining constant. What will the new volume
    8·1 answer
  • In this ecosystem, energy storage molecules are found inside organisms.
    11·2 answers
  • Which combination of elements below will bond ionically and in the same ratio as lithium when it bonds to sulfur?
    8·2 answers
  • Name three common
    5·1 answer
  • How many hydrogen atoms Is needed for C2H2 to become saturated
    15·1 answer
  • Can propanol become oxidised to propanoic acid
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!