Answer:
The percentage yield is 80.36% (see calculations in attachment).
Explanation:
The theoretical yield of the reaction is the <u>amount of product that would result if all the limiting reagent reacted.</u> The theoretical yield is calculated using the balanced equation.
In practice, the actual yield, or the <u>amount of product actually obtained from a reaction</u>, is almost always less than the theoretical yield.
To determine how efficient this reaction is, we need to calculate the percent yield, which describes the <u>proportion of the actual yield to the theoretical yield.</u> It is calculated as follows:
First we need to make sure that the equation is properly balanced. In the question they provide the balanced equation.
Since water is in excess, we calculate the theoretical yield using PCl₃.
Answer:
What atoms are present in carbon tetrachloride?
There is 1 carbon, and 4 chlorine atoms (or chloride ions if you want to get technical). Tetra means 4 in Greek.
hope that helps❤
Answer:
H₂SO₄
Explanation:
We have a compound formed by 0.475 g H, 7.557 g S, 15.107 g O. In order to determine the empirical formula, we have to follow a series of steps.
Step 1: Calculate the total mass of the compound
Total mass = mass H + mass S + mass O = 0.475 g + 7.557 g + 15.107 g
Total mass = 23.139 g
Step 2: Determine the percent composition.
H: (0.475g/23.139g) × 100% = 2.05%
S: (7.557g/23.139g) × 100% = 32.66%
O: (15.107g/23.139g) × 100% = 65.29%
Step 3: Divide each percentage by the atomic mass of the element
H: 2.05/1.01 = 2.03
S: 32.66/32.07 = 1.018
O: 65.29/16.00 = 4.081
Step 4: Divide all the numbers by the smallest one
H: 2.03/1.018 ≈ 2
S: 1.018/1.018 = 1
O: 4.081/1.018 ≈ 4
The empirical formula of the compound is H₂SO₄.
<span>Not all solids melt when they are heated. Some may undergo chemical changes as a result of heating. For example paper burns rather than melts</span>
Answer is D absorption line at 502
