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Brut [27]
2 years ago
6

Which procedure cannot be performed on a hot plate, requiring a Bunsen burner instead

Chemistry
1 answer:
ankoles [38]2 years ago
4 0

Answer: Heating a crucible to remove water from a hydrate.

Explanation:

The options are:

a. Heating a solvent to help a solute dissolve.

b. Heating an isolated solid to dry it.

c. Heating water to boiling for a water bath.

d. Heating a crucible to remove water from a hydrate.

The procedure that can be performed on a hot plate are:

a. Heating a solvent to help a solute dissolve.

b. Heating an isolated solid to dry it.

c. Heating water to boiling for a water bath.

It should be noted that the hot plate cannot be used for heating of crucible in order to remove water from a hydrate. It is not advisable for someone to heat any silica or ceramic objects on a hot plate.

Therefore, heating a crucible to remove water from a hydrate is the correct option.

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The lock-and-key mechanism refers to
miskamm [114]

Answer:

A). The complementary shapes of an enzyme and a substrate.

Explanation:

The Lock-and-key mechanism was proposed by Emil Fischer for the first time and characterized as the metaphor which helps in elucidating the specificity of the enzymatic reactions. In this metaphor, the lock is described as the enzyme while 'key' is characterized as the substrate which the enzyme acts upon. If the key is not appropriately sized, it will not fit into the active site i.e. the keyhole of the lock or enzyme and reaction will not take place. Thus, <u>option A</u> is the correct answer.

5 0
2 years ago
Read 2 more answers
which factors are needed to determine the amount of heat absorbed by an aluminum cube after it is warmed? check all that apply
Deffense [45]

Answer:

Explanation:

final temperature of the cube

initial temperature of the cube

mass of the cube

specific heat of aluminum

4 0
2 years ago
A student created a ball and stick molecule during the lesson on molecules and atoms. Examine the model shown here. Which statem
Rzqust [24]

A molecular model is a three dimensional representation of a molecule. It shows all the atoms in the molecule.

The statements that can be supported by the information in the model are;

  • The model shows a molecule with 14 atoms
  • The model shows a molecule with two different elements

We can see from the model shown that there are white balls and black balls. Each ball represents an atom of an element.

There are 14 balls in total meaning that there are 14 atoms presents. Each color of balls stands for an element. There are two different colors in the model implying that there are two different kinds of elements in the molecule.

Learn more: brainly.com/question/156574

4 0
1 year ago
What volume in milliliters of concentrated HCl (12 M) is needed to make 1500 mL of a 3.5 M solution?
Leviafan [203]
This process involves the dilution of the 12 molar HCl. To reduce the concentration, we need to set up an equality so that we know how much of the 12M we need to make the 3.5M.

12 moles HCl 3.5 moles HCl
——————— = ———————
1 Liter of Soln ‘x’ Liters of Soln

Notice that the 12 moles over the 1 liter is equal to 12 molar; in doing this, we’re maintaining the concentration of the initial HCl. By setting it equal to the 3.5 over ‘x’, we’re still maintaining the concentration.

After solving, we find that ‘x’ equals 0.292. This value means that in 0.292 liters of our 12 M HCl solution, there are 3.5 moles of HCl. But, we’re not done yet.

0.292 liters of 12 M HCl can make 1 liter of 3.5 M HCl, but the question asks for 1.5 liters. To get this, multiply 0.292 liters by 1.5, and the new result, 0.4375, represents the amount of 12 M HCl required to prepare a 1500 mL 3.5 M HCl solution.
5 0
2 years ago
Read 2 more answers
The atomic mass for Fluorine is greater than 9. The atomic number for Fluorine is 9, so the NUCLEUS of the atom has: *
Mashutka [201]

C.. it wants to try to remain in a state of equilibrium or equal

with that being said it wants to electrons to be equal to the number of electrons as much as possible

its like static friction when you rub a balloon on your head... you are replacing electrons for neutrons and that why it can stick to a wall after you rub it on your head because a wall only has negative atoms and when you rub the balloon on your head it takes some positive and charges it up positively and attracts to the negative atoms on the wall


plz mark brainliest

8 0
2 years ago
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