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Dmitriy789 [7]
3 years ago
9

A sample of Copper absorbs 43.6 KJ of heat, resulting in a temperature rise of 75.0 oC, determine the mass (in Kg) of the copper

sample, if the specific heat capacity of Copper is 0.385 J/g oC
Chemistry
1 answer:
yanalaym [24]3 years ago
3 0

Explanation:

here is the answer to your question

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Br2 + 2LiF → 2LiBr + F2
N76 [4]

1 grams F2 to mol = 0.02632 mol

10 grams F2 to mol = 0.26318 mol

20 grams F2 to mol = 0.52636 mol

30 grams F2 to mol = 0.78954 mol

40 grams F2 to mol = 1.05272 mol

50 grams F2 to mol = 1.3159 mol

100 grams F2 to mol = 2.6318 mol

200 grams F2 to mol = 5.2636 mol

6 0
3 years ago
Which of the following could not be a resonance structure of CH3NO2?
Naddik [55]

Answer:

the answer is b.CH3NO2 I guess I'm correct

4 0
3 years ago
A 9.000L tank at 27.0°C is filled with 5.29g of sulfur tetrafluoride gas and 15.6g of carbon dioxide gas. You can assume both ga
Colt1911 [192]

Answer:

Mole fraction SF₄: 0,121

Mole fraction CO₂: 0,879

Partial pressure SF₄: 0,134 atm

Partial pressure CO₂: 0,968 atm

Total pressure: 1,102 atm

Explanation:

The moles of sulfur tetrafluoride gas and carbon dioxide gas are:

5,29g SF₄×\frac{1mol}{108,07g}= <em>0,0489 moles SF₄</em>

15,6 CO₂×\frac{1mol}{44,01g}= <em>0,354 moles CO₂</em>

Mole fraction SF₄:

X_{SF_{4}} = \frac{0,0489mol}{0,0489+0,354} = <em>0,121</em>

Mole fraction CO₂:

X_{CO_{2}} = \frac{0,354mol}{0,0489+0,354} = <em>0,879</em>

It is possible to obtain partial pressure of both gases with moles of each gas using:

P = nRT/V

Where n are respective moles, R is gas constant (<em>0,082atmL/molK</em>), T is teemperature (27°C=<em>300,15K</em>), V is volume (<em>9,0000L)</em>

Replacing:

Partial pressure SF₄: <em>0,134atm</em>

Partial pressure CO₂: <em>0,968atm</em>

Now, the sum of the partial pressures is the total pressure in the tank, that means:

Total pressure: 0,134atm + 0,968atm = <em>1,102atm</em>

<em></em>

I hope it helps!

6 0
3 years ago
Chloroform has a density of 1.5 g/ml. What the mass of 10.0 ml of Chloroform?
anzhelika [568]
  • Volume=10ml
  • Density=1.5g/ml

\boxed{\sf Density=\dfrac{Mass}{Volume}}

\\ \sf\longmapsto Mass=Density\times Volume

\\ \sf\longmapsto Mass=1.5(10)

\\ \sf\longmapsto Mass=15g

6 0
3 years ago
What happens when a student/ classmate gets Sulphuric in there eyes?
agasfer [191]

Answer:

don't try this in lab

Explanation:

  1. it can irritate eyes and cause burning
  2. swelling and tearing of eyes
  3. blurred vision and may cause blindness
4 0
2 years ago
Read 2 more answers
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