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Brrunno [24]
2 years ago
13

Based on the table below:

Chemistry
1 answer:
Vadim26 [7]2 years ago
3 0

Answer:

the location of america is science more 50 points for me

Explanation:

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When a chemical reaction takes place, the number of atoms each element in the reactants ____ the number of atoms of each element
Rzqust [24]

Answer: is equal to

Explanation: According to law of conservation of mass, the mass can neither be created nor be destroyed. Thus the mass of products must be equal to the mass of reactants.

In order to have same mass on both sides of the chemical equation, the number of atoms of each element must be same in reactants as well as products.

2Na+Cl_2\rightarrow 2NaCl

6 0
3 years ago
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The density of an unknown gas at 98°C and 740 mmHg is 2.50 g/L. What is the molar mass of the gas with work showed?
noname [10]

Answer:

78.2 g/mol  

Step-by-step explanation:

We can use the <em>Ideal Gas Law</em> to solve this problem:

       pV = nRT

Since n = m/M, the equation becomes

      pV = (m/M)RT     Multiply each side by M

   pVM = mRT               Divide each side by pV

        M = (mRT)/(pV)

Data:

ρ = 2.50 g/L

R = 0.082 16 L·atm·K⁻¹mol⁻¹

T =98 °C

p = 740 mmHg

Calculation:

(a)<em> Convert temperature to kelvins </em>

T = (98 + 273.15) = 371.15 K

(b) <em>Convert pressure to atmospheres </em>

p = 740 × 1/760 =0.9737 atm

(c) <em>Calculate the molar mass </em>

Assume V = 1 L.

   Then m = 2.50 g

            M = (2.50 × 0.082 06 × 371.15)/(0.9737 × 1)

                = 76.14/0.9737

                = 78.2 g/mol

3 0
3 years ago
What is the mass of 4.2 mol of the element iron (Fe)?Answer in units of g.
lbvjy [14]

Answer:

2.35 *10^2 g

Explanation:

4.2 mol Fe *55.845 g/1 mol = 234.549 > 2.35 *10^2 g

8 0
3 years ago
Coal,oil,and natural gas are examples of earths _______<br><br> Fill out the blank
Aleks04 [339]
Non renewable resources
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Smoking cigarettes is banned in petrol stations because of the risk of explosions.
Alina [70]

Answer:

well it is because of mainly what we call reaction the petrol are highly reactive with the flames

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