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weeeeeb [17]
3 years ago
5

Ground water has some minerals dissolved in it. If you heat this water, collect the vapor in another container, and then cool it

, you will get pure, or distilled, water. What makes this process a physical change?
It forms a new substance (minerals), which is a physical change.
It forms a new substance (water vapor), which is a physical change.
It changes the color of water, which is a physical change.
It changes the molecular structure of water, which is a physical change.
It separates dissolved substances, which is a physical change.
NextReset
Chemistry
2 answers:
ale4655 [162]3 years ago
8 0
B IS THE ANSWER THANK YOU FOR ALL THE PEPOLE THAT ANSWER MY QUESTION MAHALO!!!!!!
Sonbull [250]3 years ago
4 0
It would be B. Because it forms a new substance (water vapor) which is a physical change.
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How many grams of H2O would be produced if you started with 7 moles of ethylene (C2H4 )?
nydimaria [60]

Answer:

Explanation:

so if the reaction is C2H4+3O2-->2H2O+2CO2

if there were 7 moles of C2H4:

(see the attachment)

4 0
2 years ago
Calculate the mass of Octane needed to release 6.20 mol Co2
n200080 [17]
The combustion reaction of octane is as follow,

                           C₈H₁₈  +  25/2 O₂     →     8 CO₂  +  9 H₂O

According to balance equation,

8 moles of CO₂ are released when  =  114.23 g (1 mole) Octane is reacted

So,

      6.20 moles of CO₂ will release when  =  X g of Octane is reacted

Solving for X,
                                     X  =  (114.23 g × 6.20 mol) ÷ 8 mol

                                     X  =  88.52 g of Octane
Result:
           88.52 g of Octane is needed to release 6.20 mol CO₂.
8 0
2 years ago
What is the ionsphere in the layers of the atmosphere?
Alika [10]
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5 0
3 years ago
Given 2.14g of B2H6
Shkiper50 [21]

Answer:

(A) is 0.0773 mol B2H6

(C) is 2.79 x 10^23 H atoms

Explanation:

Questions (A) and (B) are the same.

2.14 g B2H6 x (1 mol B2H6/27.668g B2H6) = 0.0773 mol B2H6 (A)

<u>27.668 is the molar mass of B2H6 calculated from the period table: </u>

(2 x 10.81) + (6 x 1.008) = 27.668

1.008 is the mass of H and 10.81 is the mass of B

(C)

0.0773 mol B2H6 x (6 mol H/ 1 mol B2H6) x (6.022 x 10^23 H atoms/1 mol H)

= 2.79 x 10^23 hydrogen atoms

Further Explanation:

  • For every 1 mol of B2H6, there are 6 moles of H (indicated by the subscript)
  • 6.022 x 10^23 is Avogrado's number and it equals to 1 mol of anything
  • Avogrado's number can be in units of atoms, molecules, or particles
5 0
3 years ago
An ice cube tray full of water is put into a freezer. Which energy change occurs in the particles in the water as it undergoes a
o-na [289]

Answer:

A

Explanation:

increase in energy - hotter and/or more reactive

decrease in energy - colder and/or less reactive

Since it is going from a liquid to solid it will have a tighter arrangement of particles.

3 0
2 years ago
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