A physical change is a change that can be fixed like cutting wood or tearing paper, or breaking a bone, on the flip side chemical changes cannot be undone, this is like rust on a nail
Answer:

Explanation:
Hello, in this case, one could consider the undergoing chemical reaction as:

Thus, since 1.0 g of strontium carbonate is placed, the equilibrium equation takes the following form, excluding the solid-stated species and considering just the carbon dioxide as it is gaseous:

Hence, since at the beginning there is no carbon dioxide, its pressure at equilibrium equals Kp:

Which was clearly defined above.
Best regards.
Answer:
18 electrons
Explanation:
If you search on Google you get the same answer, so the question gives you your answer.
Answer:
The moles of KClO3 = 0.052 moles
Explanation:
Step 1: Calculate the pressure of oxygen gas
The oxygen has a total pressure (including water vapour) of 760 mmHg
The pressure of Oxygen = (760 - 26) mmHg
= 734 mmHg of water vapor
Step 2: Calculate the no of moles of oxygen
Using Ideal gas equation
P V = n R T
P = pressure of oxygen in N/m2 ( you should convert 734 mmHg to pascal or N/m2) = 97,858.6 N/m2 or pas
V = 2 litres = 0.002 m3
R = gas constant = 8.31
T= 27oC = 300 K
Applying this equation P V = n R T
97,858.6 x 0.002 = n x 8.31 x 300
n = 0.0785 mol of Oxygen
From the balanced equation
2 KClO 3 ---- 2 KCl + 3 O 2
3 moles of oxygen is produced from 2 moles KClO3
so 0.0785 mole of oxygen will be produced from x
x = (0.0785 x 2 ) / 3
x = 0.052 moles of KClO3
Answer:
1s2: correct.
6s3: incorrect because the subshell s can hold up to 2 electrons.
5f10: correct.
4d3: correct.
2d4: incorrect because the second energy level just has the s and p subshells.
3p10: incorrect because the p subshell can hold up to 6 electrons.
Explanation:
Hello there!
In this case, according to the attached file, which shows the correct orbitals and electrons, we can proceed as follows:
1s2: correct.
6s3: incorrect because the subshell s can hold up to 2 electrons.
5f10: correct.
4d3: correct.
2d4: incorrect because the second energy level just has the s and p subshells.
3p10: incorrect because the p subshell can hold up to 6 electrons.
Best regards!