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krek1111 [17]
3 years ago
13

When one form of energy is transformed into another no energy is destroyed in the process?

Chemistry
1 answer:
katrin2010 [14]3 years ago
8 0
Yes that is true, when energy is transformed energy is not destroyed.
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The amount of kinetic energy an object has depends on its:
UkoKoshka [18]

Answer:

the 4th one

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I hope it help

3 0
2 years ago
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How many milliners of hydrogen gas ar produced by the reaction 0.020 moles of magnesium with excess of hydrochloride acid at sto
jeyben [28]

Answer:- 448 mL of hydrogen gas are formed.

Solution:- It asks to calculate the volume of hydrogen gas formed in milliliters at STP when 0.020 moles of magnesium reacts with excess HCl acid. The balanced equation is:

Mg+2HCl\rightarrow MgCl_2+H_2(g)

There is 1:1 mol ratio between Mg and hydrogen gas. So, the moles of hydrogen gas is also equals to the moles of Mg reacted.

moles of Hydrogen gas formed = 0.020 mol

At STP, volume of 1 mol of the gas is 22.4 L. We need to calculate the volume of 0.02 moles of hydrogen gas.

0.02mol(\frac{22.4L}{1mol})

= 0.448 L

They want answer in mL. So, let's convert L to mL using the conversion formula, 1L = 1000mL

0.448L(\frac{1000mL}{1L})

= 448 mL

So, 0.020 moles of magnesium would produce 448 mL of hydrogen gas at STP on reacting with excess of HCl acid.

5 0
3 years ago
Does anyone know a website where it solves me these types of problems OR if someone can help me with them?
Brut [27]

Answer:

you can use the idea of molecular masses to calculate easily

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If there are 7 moles of copper dissolved in 15 moles of zinc to make 22 moles of a brass solution. What is the mole fraction of
iragen [17]
Mole fraction of copper is 7/22
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3 years ago
Which one of the following compounds is not covalent?
denpristay [2]
KCI is not a covalent compound, it is an ionic compound. 
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3 years ago
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