The mass of 3.0 moles of ⁶³Cu atoms is 188.8 g
<h3>Stoichiometry</h3>
From the question, we are to calculate the mass of 3.0 moles of ⁶³Cu atoms.
From the given information,
One ⁶³Cu atom has a mass of 1.045 × 10⁻²² g
First, we will determine the number of atoms present in 3.0 moles of ⁶³Cu atoms
Using the formula,
Number of atoms = Number of moles × Avogadro's constant
Number of ⁶³Cu atoms present = 3.0 × 6.022 × 10²³
Number of ⁶³Cu atoms present = 18.066 × 10²³ atoms
Now, we will determine the mass of 18.066 × 10²³ ⁶³Cu atoms
If 1 ⁶³Cu atom has a mass of 1.045 × 10⁻²² g
Then,
18.066 × 10²³ ⁶³Cu atoms will have a mass of 18.066 × 10²³ × 1.045 × 10⁻²²
18.066 × 10²³ × 1.045 × 10⁻²² = 188.7897 g
≅ 188.8 g
Hence, the mass of 3.0 moles of ⁶³Cu atoms is 188.8 g
Learn more on Stoichiometry here: brainly.com/question/13654901
Answer:
0th order with respect to oxygen.
Explanation:
Whenever we have a table with the molarity of a substance against time, the best idea is to input the time into one cell of Excel and molarity into the other adjacent cell of Excel.
We wish to produce 3 plots: plot 1 would contain time on the x-axis and molarity values on the y-axis. In case we get a straight line in the graph, we can verify that this is a 0th order reaction.
Plot 2 would need us to calculate the natural logarithm of each concentration and plot time on the x-axis and ln of each molarity on the y-axis. In case we get a straight line, we can verify a 1st order reaction.
Plot 3 would require calculating the reciprocal of each molarity, that is, 1/[O2] in each case. Plotting time on the x-axis and 1/[O2] on the y-axis would yield a graph. In case this graph is linear, then the reaction order is 2nd.
We plot each graph and add trendline in Excel. None of the graphs is perfectly linear, so the only data we can rely on is the R-squared coefficient. The closer it is to 0, the closer your points resemble a line. Out of all three graphs, the highest R-squared value is seen for the 0th order rate law at a value of 0.8721 against 0.7749 for the 1st and 0.6255 for the second.
You may wish to refer to the Excel file for the details.
The physical properties of water is that it is clear, it has no taste. No odour. It freezes at 0 degrees Celsius and boils at 100 degrees Celsius. The different stages of water is liquid, solid and gas. It is liquid at normal state. Ice when solid and steam when it is a gas state.
It is essential for human life because majority of the human body is made out of water. The water in the body allows certain parts and organs to function properly. Without water humans are most like to become I’ll and even dehydrate causing major injuries. It is also essential for the brain to function
The answer of this question is Oxygen
Answer:
2HClO4(aq) + Ca(OH)2(aq) → Ca(ClO4)2(aq) + 2H2O(l)
Perchloric acid + Calcium hydroxide → Calcium perchlorate + Water.
Explanation:
This is a neutralization reaction where the acid, Perchloric acid reacts completely with an appropriate amount of base, aqueous Calcium hydroxide to produce salt, aqueous Calcium perchlorate and water, liquid H2O only.
During this reaction, the hydrogen ion, H+, from the HClO4 is neutralized by the hydroxide ion, OH-, from the Ca(OH)2 to form the water molecule, H2O.
Thus, it is called a neutralization reaction.