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Salsk061 [2.6K]
3 years ago
6

How is matter and energy conserved when liquid is frozen

Chemistry
1 answer:
Brut [27]3 years ago
3 0

Answer:

The big energy change when water freezes is in the potential energy of interactions between the water molecules.

Explanation:

I am not to sure if this is correct, but I hope it helps in some way.

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Moon rocks collected on the moon were returned to earth are made of basalt, a light volcanie rock, have a density of 2.7 g/cm?.
Marina86 [1]

Answer:

160cm³

Explanation:

V = \frac{m}{D} = \frac{432}{2.7} = 160

5 0
3 years ago
How many moles are in 4.6 x 10^19 atoms? <br><br> *#27 is the question
velikii [3]
There are 0.000076 moles in 4.6 x 10^19 atoms.
3 0
3 years ago
What does contact forces and non-contact forces mean?
Dmitrij [34]
A contact force is a force in which and object comes in contact with a another object. A non-contact force, is a force is an object applied by another body. (A good example of a non-contact force is gravity)
8 0
3 years ago
When does phenolphthalein turn pink?
Svetach [21]

Answer is: a) in the presence of a base.

Phenolphthalein is colorless in acidic solutions and pink in basic solutions.

Acid-base indicators are usually weak acids or bases and they are chemical detectors for hydrogen or hydronium cations.

Example for acid-base indicator is phenolphthalein (molecular formula C₂₀H₁₄O₄).

When solution turns phenolphthalein pink, it means it is basic (pH>7).

3 0
3 years ago
Read 2 more answers
+ H₂O
trapecia [35]

Answer:

None of these are correct, because there is no way to balance this equation, but I hope these steps help you figure out your answer.

Explanation:

Count out the single amounts of elements you have on both sides of the equation. To be balanced, you need to have the exact same for each element.

Before balanced Left side.

Cl-2

O-8

H-2

Before balanced right side.

H-1

Cl-1

O-3

That means we need to increase Hydrogen, Chlorine and Oxygen on the right for sure and see how that affects the equation. You can keep adding the Coefficients until the # of elements begin to match on each side.  

(I tried to balance this equation, it doesn't work, there is too much on the reactants side for what the product is.)

8 0
3 years ago
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