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amid [387]
3 years ago
5

The amount of energy required to raise the temperature of a gram of substance 1°C.*

Chemistry
1 answer:
Grace [21]3 years ago
6 0

Answer:

don't DT yt gdx duh f tdd

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Given 2Na + Cl2=2NaCl, what is the excess reactant? What is the limiting reactant?
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Answer: The limiting reactant is Na

Explanation:

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Isotopes: are atoms of different elements which have the same mass are atoms of the same element with equal numbers of neutrons
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What mass of sulfur has to burn to produce 4.5L SO2 at 300°C and 101 kPa in the following reaction?s(s)+O2(g) SO,(g)
Alex_Xolod [135]
<span>Answer: option B. 3.07 g

Explanation:

1) given reaction:

S(s) + O₂ (g) → SO(g)

2) Balanced chemical equation:

</span><span>2S(s) + O₂ (g) → 2SO(g)

3) Theoretical mole ratios:

2 mol S : 1 mol O₂ : 2 mol SO

3) number of moles of 4.5 liter SO₂ at</span><span> 300°C and 101 kPa

use the ideal gas equation:

pV = nRT

with V = 4.5 liter
p = 101 kPa
T = 300 + 273.15 K = 573.15 K
R = 8.314 liter×kPa / (mol×K)

=> n = pV / (RT) =

n =  [101 kPa × 4.5 liter] / [8.314 (liter×kPa) / (mol×K)  × 573.15 K ]

n = 0.0954 mol SO

4) proportion with the theoretical ratio S / SO

 2 mol S                   x
-------------- = ----------------------
 2 mol SO      0.0954 mol SO

=> x = 0.0954 mol S.

5) Convert mol of S to grams by using atomic mass of S = 32.065 g/mol

mass = number of moles × atomic mass

mass = 0.0954 mol × 32.065 g/mol = 3.059 g of S

6) Therefore the answer is the option B. 3.07 g
</span>
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3 years ago
What is atomic radius? Does it decrease going up or down a group?
shusha [124]
The atomic radius increases as you go down a group.
5 0
3 years ago
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