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uranmaximum [27]
3 years ago
15

Which 2 minerals can be scratched by a Diamond but NOT Quartz

Chemistry
1 answer:
Kazeer [188]3 years ago
3 0

Answer:

topaz and corundum

Explanation:

i know things

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In a particular experiment at 300 ∘C, [NO2] drops from 0.0100 to 0.00800 M in 100 s. The rate of appearance of O2 for this perio
Tems11 [23]

Answer:

1\times{10}^{-5}\frac{M}{s}

Explanation:

The stoichiometry for this reaction is  

2NO_2\rightarrow2NO+O_2

The rate for this reaction can be written as  

-r_{NO_2}=-\frac{d\left[NO_2\right]}{dt}=\frac{(0.01-0.008)M}{100s}=2\times{10}^{-5}\frac{M}{s}

This rate of disappearence of NO_2 can be realated to the rate of appearence of O_2 as follows  (the coefficients of each compound are defined by the stoichiometry of the reaction)

-r_{O_2}=-r_{NO_2}\times\frac{coefficient\ O_2\ }{coefficient\ NO_2}=2\times{10}^{-5}\frac{M}{s}\times\frac{1\ mole\ O_2\ }{2\ mole\ NO_2}=1\times{10}^{-5}\frac{M}{s}

6 0
4 years ago
In a hydrogen fuel cell, hydrogen gas and oxygen gas are combined to form water. write the balanced chemical equation describing
UkoKoshka [18]
I believe it is this:
2 H2 + O2 ---> 2 H2O
4 0
3 years ago
Read 2 more answers
PLEASE ANSWER THESE QUESTIONS FOR 21 POINTS AND A BRAINLIEST, KEEP IN MIND THESE QUESTIONS ARE VERY IMPORTANT AND WILL DETERMINE
Katena32 [7]
Sexual Reproduction requires two parents.
6 0
3 years ago
Consider the reaction h2(g) + cl2(g) ⇀↽ 2 hcl(g), which is exothermic as written. what would be the effect on the equilibrium po
kupik [55]
I think the effect of increasing temperature would be; the equilbrium will shift back wards. Increase in temperature favors backward reaction since the forward reaction is exothermic and the backward reaction is endothermic. Therefore, the equilibrium will shift back wards, and there will be more reactants (H2 and Cl2) compared to the products
3 0
4 years ago
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Given the unbalanced combustion equation: C3H8 + O2 → CO2 + H2O, how many moles of carbon dioxide are produced when 64.0 g of ox
gizmo_the_mogwai [7]

Moles of Carbon dioxide : 1.2

<h3>Further explanation</h3>

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction(balanced)

C₃H₈ + 5O₂=> 3CO₂ + 4H₂O

mol of O₂ :

\tt \dfrac{64}{32}=2

mol of CO₂ :

\tt \dfrac{3}{5}\times 2=1.2

4 0
3 years ago
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