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timurjin [86]
3 years ago
13

Which sample is a pure substance?

Chemistry
2 answers:
Drupady [299]3 years ago
6 0

Answer:

a test tube of zinc and oxygen

Explanation:

i just did on edgen

Tema [17]3 years ago
3 0
A test tube of zinc oxide
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Maple syrup, which comes from the sap of maple trees, contains water and natural sugars. It's a clear, brown liquid and the suga
pentagon [3]
Maple syrup, which comes from the sap of maple trees, contains water and natural sugars. It's a clear, brown liquid and the sugars can’t be separated by <span>filtration. It should be categorized as a homogeneous mixture since the sugar is homogeneously </span>dispersed<span> or mixed in water. It is completely dissolved resulting to uniform properties of the mixture.</span>
3 0
3 years ago
What is thought to cause the dispersion forces?
Ilya [14]

a) attraction between ions causes the dispersion forces.

Attraction between ions is a temporary attractive force which occurs when electrons in two consecutive adjacently placed atoms occupies positional confined areas that make the atoms acting like Temporary dipoles.

Dispersion forces or London Dispersion forces is the weakest force caused due to motion of electron.

On increasing the number of electrons the magnitude to Dispersion forces increases.

Dispersion forces also depends upon the atomic or the molecular weight of the given substance.

It is caused by an unequal and uneven distribution of the electrons inside an atom.

This causes a slight positive and slight negative charge to be formed inside an atom by establishing a temporary dipole. This temporary dipole induces a nearby atom by inducing another temporary dipole in the other one.

Learn more about Dispersion force here, brainly.com/question/14958417

#SPJ4

4 0
2 years ago
A 48 kg sample of water absorbs 366 kJ of heat. the water was initially at 20.3 ∘C, what is its final temperature?
belka [17]

Answer:

The final temperature of water = 22.1224 °C

Explanation:

<u>Step 1</u> : defien the formula for heat transfer

q = m*c*ΔT

with q = heat transfer

with m = mass of the substance

with c = specific heat ( of water in this case)

with ΔT = difference between final temperature and initial temperature

In this case :

q=366kJ = 366 *10^3 J

mass of water = 48kg = 48000g

c= specific heat of wwater = 4.184 J / g °C

initial temperature = 20.3 °C

final temperature =  TO BE DETERMINED

<u>Step 2</u>: Calculate temperature

366000 J = 48000g * 4.184J/g °C * (T2 - 20.3)

366000 / (480000 * 4.184) = 1.8224 = (T2 - 20.3)

T2 = 20.3 + 1.82 =22.1224 ° C

The final temperature of water = 22.1224 °C

8 0
3 years ago
A sample of aluminium has a mass of 54 gram. What is the mass of the same number of magnesium atom.​
Arada [10]

Answer:

48g of Magnesium.

Explanation:

We know that:

Mole=given mass/molar mass

Then, moles of aluminum = 54/27 = 2.

A/c to question ,

For 2 moles of magnesium it's mass is 2×24=48g.

Hence, the required mass for same number of magnesium atoms is 48g.

(Hope this helps can I pls have brainlist (crown)☺️)

5 0
3 years ago
Which of the following elements has the lowest ionization energy?
lakkis [162]

Explanation:

Na

Na (gas) -> Na+ (g) + e-

8 0
3 years ago
Read 2 more answers
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