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Vladimir79 [104]
2 years ago
7

A reaction requires 2.5 moles of zinc oxide. how many grams would this equate to?​

Chemistry
1 answer:
Nady [450]2 years ago
4 0

Answer: 45.038

Explanation: 2.016 H (2*1.008) + 15.999 O (1*15.999)

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You are right sugar is a mixture and salad, water and potassium are all wrong.
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What is the overall charge of an atom? Explain why
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atoms have no overall charge. this is because they contain equal numbers of positive protons and negative electrons

4 0
2 years ago
At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.200 M and [NO]=0.600 M. N2(g)+O2(g)↽−−⇀2NO(g) If
cestrela7 [59]

Answer:

0.84M

Explanation:

Hello,

At first, the equilibrium constant should be computed because the whole situation is at the same temperature so it is suitable for the new condition, thus:

K_{eq}=\frac{[NO]^2_{eq}}{[N_2]_{eq}[O_2]_{eq}} \\K_{eq}=\frac{0.6^2}{0.2*0.2}\\ K_{eq}=9

Now, the new equilibrium condition, taking into account the change x, becomes:

9=\frac{[NO]^2_{eq}}{[N_2]_{eq}[O_2]_{eq}}\\9=\frac{[0.9+2x]^2}{[0.2-x][0.2-x]}

Nevertheless, since the addition of NO implies that the equilibrium is leftward shifted, we should change the equilibrium constant the other way around:

\frac{1}{9} =\frac{[N_2]_{eq}[O_2]_{eq}}{[NO]^2_{eq}}\\\frac{1}{9} =\frac{[0.2+x][0.2+x]}{[0.9-2x]^2}

Thus, we arrange the equation as:

\frac{1}{9} (0.9-2x)^2=(0.2+x)^2\\0.09-0.4x+4x^2=0.04+0.4x+x^2\\3x^2-0.8x+0.05=0\\x_1=0.06

Finally, the new concentration is:

[NO]_{eq}=0.9-0.06=0.84M

Best regards.

7 0
3 years ago
A change in which property of light will have no effect on whether or not the photoelectric effect occurs?
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Answer:

Intensity

Explanation:

The correct answer is -Intensity

Reason -

Intensity has no affect on whether or not the photoelectric effect occurs.

As frequency , wavelength are inversely proportional.

6 0
2 years ago
Which of the following is not an example of a base?<br><br> KOH<br> LiOH<br> HCl<br> NaOH
Inessa05 [86]
HCI, so C HCI is an acid
7 0
2 years ago
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