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worty [1.4K]
3 years ago
10

When 500 g of water is cooled from 80.0°C to 10.0°C, how much heat energy is lost?

Chemistry
2 answers:
vampirchik [111]3 years ago
6 0

I don’t know

Explanation:

Rashid [163]3 years ago
4 0
This is a solved problem that is close I cannot tell u the direct answer but I hope this STEP BY STEP layout will help

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Calculate the amount of carbon dioxid gas in 1.505x10^23 molecules of the gas.
Daniel [21]

Explanation:

  • We need to find the amount of carbon dioxide gas in 1.505\times 10^{23} molecules of the gas.
  • We know that, 1 mole weighs 44 gram of carbon dioxide which contains 6.022\times 10^{23} number of molecules. It means that, 6.022\times 10^{23} number of molecules present in 44 grams of carbon dioxide molecule. So,1.505\times 10^{23}  number of molecules present in :

=\dfrac{1.0505\times 10^{23}}{6.022\times 10^{23}}\times 44\\\\=7.675\ \text{grams}

  • Hence, 7.675 grams of carbon dioxide is present in 1.505\times 10^{23} molecules of the gas.
4 0
3 years ago
Calculate the molecular weights for NH3 and SF6.
nevsk [136]
Hi there,

NH3 has the weight of 17.03 grams, and SF6 has the weight of 146.06 grams 

so in total, there is 163.09 grams

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4 0
3 years ago
Which coefficients will balance the following reaction:
valentina_108 [34]

Answer:

C ) 2, 1, 2

Explanation:

The given reaction is synthesis reaction in which lithium and bromine react to form lithium bromide.

Chemical equation:

Li + Br₂    →    LiBr

Balanced chemical equation:

2Li + Br₂    →    2LiBr

Step 1:

Li + Br₂    →    LiBr

left hand side                         Right hand side

Li = 1                                        Li = 1

Br = 2                                        Br = 1

Step 2:

Li + Br₂    →    2LiBr

left hand side                         Right hand side

Li = 1                                        Li = 2

Br = 2                                        Br = 2

Step 3:

2Li + Br₂    →    2LiBr

left hand side                         Right hand side

Li = 2                                       Li = 2

Br = 2                                        Br = 2

3 0
3 years ago
when the concentration of hydrogen ions in a solution is decreased by a factor of ten, the pH of the solution
Vladimir [108]

Answer:

Increases by 1

Explanation:

8 0
3 years ago
Describe polar covalent bonds using water as an example
Dahasolnce [82]
<span>A covalent bond is a bond formed by atom sharing.
In water molecule, there are twice the number of hydrogen atoms than the oxygen atoms. Its structure is H-O-H. The electronegative difference between the H and O allows them to be polar because on side there is positive charge and on another side there is negative charge.</span>
3 0
3 years ago
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