Answer:
<em><u>The compound hydrogen chloride has the chemical formula HCl and as such is a hydrogen halide. At room temperature, it is a colourless gas, which forms white fumes of hydrochloric acid upon contact with atmospheric water vapor. Hydrogen chloride gas and hydrochloric acid are important in technology and industry. Hydrochloric acid, the aqueous solution of hydrogen chloride, is also commonly given the formula HCl.</u></em>
<em><u>hey </u></em><em><u>where </u></em><em><u>are </u></em><em><u>you </u></em><em><u>live </u></em><em><u>can </u></em><em><u>be </u></em><em><u>friend </u></em><em><u>I </u></em><em><u>am </u></em><em><u>new </u></em><em><u>in </u></em><em><u>Brainly</u></em>
Answer:
Q = 1291.5
Explanation:
Step 1: Data given
Kc = 6.9 * 10^5 at 500 K
Volume = 5.0 L
Number of moles NO = 0.056 moles
Number of moles O2 = 1.0 moles
Number of moles NO2 = 0.90 moles
Step 2: The balanced equation
2NO(g) + O2(g) ⇌ 2NO2(g)
Step 3: Calculate the concentration
Concentration = moles / volume
[NO] = 0.056 moles / 5.0 L
[NO]= 0.0112 M
[O2] = 1.0 mol / 5.0L
[O2] = 0.2 M
[NO2] = 0.90 moles / 5.0L
[NO2] = 0.18 M
Step 4: Calculate Q
Q = [NO2]²/[NO]²[O2]
Q = [0.18²]/[(0.0112²)(0.2)]
Q = 1291.5
The correct answer is b. an element
The explanation:
when the ELEMENT is define as substance that cannot be decomposed (broken down) into simpler substances by ordinary chemical means. Examples: gold, iron, carbon, hydrogen, oxygen, nitrogen
Ex: diamond will be broken into carbon as well.
and SUBSTANCE: Material composed of only one kind of matter throughout (same atoms or same molecules).