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faltersainse [42]
2 years ago
8

What is fire and how does it work

Chemistry
1 answer:
xenn [34]2 years ago
3 0

Answer:

Fire is the result of applying enough heat to a fuel source, when you've got a whole lot of oxygen around. As the atoms in the fuel heat up, they begin to vibrate until they break free of the bonds holding them together and are released as volatile gases. These gases react with oxygen in the surrounding atmosphere.

Explanation:

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which term is used when sugar is completely dissolved in water                                                                 
GaryK [48]
The term which is used is homogeneous.
when sugar is completely dissolved in the water, the mixture or solution homogeneous, both in same phase and same uniform texture that is liquid.
There two types of mixtures are heterogeneous and homogeneous in different phases.
If sugar is not completely dissolved in water and you see the crystals of sugar in water, then the solution will be heterogeneous.
3 0
3 years ago
The leaves of the rhubarb plant contain high concentrations of diprotic oxalic acid (hooccooh) and must be removed before the st
Andrei [34K]
First we have to find Ka1 and Ka2
pKa1 = - log Ka1 so Ka1 = 0.059
pKa2 = - log Ka2  so Ka2 = 6.46 x 10⁻⁵
Looking at the values of equilibrium constants we can see that the first one is really big compared to second one. so, the pH will be affected mainly by the first ionization of the acid.
Oxalic acid is H₂C₂O₄
H₂C₂O₄      ⇄     H⁺   + HC₂O₄⁻
0.0356 M            0          0
0.0356 - x            x          x
Ka1 = \frac{[H^+][HC2O4^-]}{[H2C2O4]} = x² / 0.0356 - x
x = 0.025 M
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5 0
2 years ago
What is the difference between 0.50 mol HCl and 0.50 M HCl?
iVinArrow [24]

Answer:

Here you go

Explanation:

6 0
2 years ago
What is the main product of the fusion reactions in our sun?
RUDIKE [14]
The sun generates its energy by nuclear fusion of hydrogen nuclei into helium.
8 0
3 years ago
The 1995 Nobel Prize in Chemistry was shared by Paul Crutzen, F. Sherwood Rowland, and Mario Molina for their work concerning th
castortr0y [4]

Answer:

-162,5 kJ/mol

Explanation:

Cl(g) + 2O2(g) --> ClO(g) + O3(g)  ΔH = 122.8 kJ/mol (as we used the reaction in the opposite direction, it will turn the enthalpy from exothermic to endothermic)

2O3(g) --> 3O2(g)   ΔH = -285.3 kJ/mol

  Cl(g) + O2(g) --> ClO(g) + O3(g)  ΔH = 122.8 kJ

+ 2O3 (g)          --> 3O2(g)              ΔH = - 285.3 kJ

O3(g) + Cl(g)     --> ClO(g) + 2O2(g)  ΔH = 122.8 + (-285.3) = -162,5 kJ

4 0
3 years ago
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