Answer:
Answer choice B
Explanation:
All things in the universe naturally flow from areas of higher concentration or energy to those with lower concentration or energy. A pump reverses this process, which means that you need to add energy to make it work. Hope this helps, and PM me with any further questions!
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Answer:
A. 3 moles of C will be produced from 1 mole of A
B. 4 moles of D will be produced from 4 moles of A
Explanation:
The balanced equation of the reaction between the three species A, C and D has been given in the question as -
A → 3C + D
According to the coefficients of the above reaction, we can draw the following conclusions -
- 1 mole of A can produce 3 moles of C
- 1 mole of A can produce 1 mole of D
Thus, as asked in the question,
If we are taking 1 mole of A then moles of C that will be produced = 3 moles
Again,
If we take 4 moles of A, then moles of D that will be produced = 4 moles.
Actually, that does not happen until the protostar becomes a star when nuclear ignition starts and is maintained. It takes awhile for new star to go through its T-Tauri stage and settle down on the main sequence.
<span>A STAR does not reach hydrostatic equilibrium until it on the main sequence. Otherwise, it would remain a brown dwarf with not enough mass to to maintain nuclear fusion for more than 3,000 to 10,00 years. </span>
Answer:
Empirical formula is: C₂H₅
Explanation:
The chemical equation of burning of a compound that conatins only Carbon and Hydrogen is:
CₓHₙ + O₂ → XCO₂ + n/2H₂O
That means the moles of CO₂ produced are the moles of Carbon in the compound and moles of hydrogen are twice moles of water. Empirical formula is the simplest ratio between moles of each element in the compound. Thus, finding molse of C and moles of H we can find empirical formula:
<em>Moles C and H:</em>
Moles C = Moles CO₂:
7.851g CO₂ ₓ (1mol / 44g) = 0.1784 moles CO₂ = Moles C
<em />
Moles H = 2 Moles H₂O
4.018g H₂O ₓ (1mol / 18.01g) = 0.2231 * 2 = 0.4417 moles H
<em>Ratio C:H</em>
The ratio between moles of hydrogen and moles of Carbon are:
0.4417 moles H / 0.1784 moles C = 2.5
That means there are 2.5 moles of H per mole of Carbon. As empirical formula must be given only in whole numbers,
<h3>Empirical formula is: C₂H₅</h3>