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kumpel [21]
3 years ago
9

Which is the best example that something has potential energy?

Chemistry
1 answer:
aalyn [17]3 years ago
4 0
The answer would be a car parked on a step hill because we’re talking about potential energy. Potential energy is when something has the potential to move.
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A solution is prepared by dissolving sugar in water. The solution is 25% by mass, sugar. How many grams of water are in 472 gram
stepan [7]

Answer:

352

Explanation:

.75 times 472 because .25 is sugar so .75 is watet

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3 years ago
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Calculate the gravitional force in between two object of mass 25kg and 20kg if distance between them is 5m?
astraxan [27]

Answer:

Explanation:The equation for this is F = -GmM/R^2 where the minus sign says the force is attractive m is 10 kg, M is 20 kg and R is 5 meters. If you crunch the numbers you get an answer of:

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Please look at the photo and identify what’s in it!
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4 years ago
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From a laboratory process, a student collects 28.0 g of hydrogen and 224.0 g of oxygen. how much water was originally involved i
nikklg [1K]

Chemical reaction is given as :

2H_{2}O\rightarrow 2H_{2}+O_{2}

Here, 2 moles of water gives 2 moles of hydrogen and one mole of oxygen.

Mass of hydrogen =  28.0 g (given)

Mass of oxygen = 224.0 g (given)

Number of moles = \frac{given mass}{molar mass}

Thus, number of moles of hydrogen = \frac{28 g}{2\times 1 g/mol}

= 14 moles of hydrogen

Number of moles of oxygen= \frac{224 g}{2\times 16 g/mol}

= 7 moles of oxygen

Now, to find the amount of water:

7 mol of oxygen \times (\frac{2 mol of water}{1 mol of oxygen})\times (18 g/mol of water)

= 252 g of water.

Thus, amount of water is 252 g (involved in the process).






4 0
4 years ago
Help me answer Hubert's 7&8 please
pshichka [43]
Boiling water relies on convection.
6 0
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