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Anestetic [448]
3 years ago
11

what is the total amount of energy absorbed by the substance as it completely changes from a solid at 40 degrees to a gas at 200

degrees
Chemistry
1 answer:
astra-53 [7]3 years ago
6 0

Answer:

I don't know the answer sorry man

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8. An elevator is moving upward with a speed of 11 m/s. Three
gizmo_the_mogwai [7]

Answer:

Average acceleration = - 2 m/s^2

Explanation: Have a nice day

3 0
3 years ago
Give a reason why hydroxide ions to an acid solution increase in ph
yanalaym [24]

Answer:

creating new water molecules and lowering the amount of free H+ in the system, thereby raising the overall pH.

Explanation:

5 0
3 years ago
As you move from left to right across the periodic table elements ?
Sidana [21]

Explanation:

Quite a number of properties varies across a period. Some remains constant whereas others decreases.

As one moves from left to right;

  • The energy level remains the same.
  • The ionization energy increases progressively as a result of increasing nuclear charge.
  • Electron affinity increases from left to right.
  • Electronegativity increases.
  • Electropositivity decreases.

learn more:

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6 0
3 years ago
Zinc is a pure substance. How could you make a mixture from a 1.0-g zinc disc?
anygoal [31]

Answer:

D)Coat the disc with another pure substance, such as copper.

Explanation:

To make a mixture of the zinc, simply coat it with another pure substance such as copper. This will result in a mixture.

What then is a mixture?

  • They are impure substances with indefinite composition.
  • They retain their physical properties
  • their constituents reacts differently to changed conditions
  • They can easily be separated into constituents by physical methods.

We can see that coating the copper on the zinc does not alter the physical properties of the metal.

Most times, the copper will wear off and leave behind the zinc.

The metal coated can easily be removed and this signifies just a physical mix.

8 0
3 years ago
The molecular weight of table salt, NaCl, is 58.5 g/mol. A tablespoon of salt weighs 6.37 grams. Calculate the number of moles o
cestrela7 [59]

Answer:

The number of moles of salt in one tablespoon is = <u>0.11 mole</u>

<u>Grams </u>cancel each other.

Explanation:

<u>Moles</u> : It is the unit of quantity . It is the mass of the substance present in exactly 12g of C-12.

moles=\frac{given\ mass}{Molar\ mass}

<u>Moles Calculation:</u>

Given mass = 6.37  gram

Molar mass = 58.5 g/mol

moles=\frac{6.37}{58.5}

= 0.1088

= 0.11 mole

<u>Units calculation</u>

moles=\frac{given\ mass}{Molar\ mass}

moles=\frac{g}{g/mole}

moles=\frac{g}{g}\times mole

<u>g ang g cancels each other </u>

moles = moles

<u>Hence unit = gram (g ) cancel each other.</u>

3 0
3 years ago
Read 2 more answers
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