Answer:
0
Explanation:
CaBr₂ is a compound, so it shouldn't have a charge--it's not an ion. But let's check to make sure.
Calcium has a charge of +2.
Bromine has a charge of -1, but there are two Br, so the charge is -2.
+2 + -2 = 0, so the overall charge is 0!
Explanation:
is the Iodite ion. The ion has a total of 7+6(2)+1 = 20 electrons. The Iodite ion, or iodine dioxide anion, is the halite with the chemical formula IO−
2. Within the ion the Iodine exists in the oxidation state of +3. The hybridization state of central atom I in Iodite ion is 
.
Answer : The change in internal energy is, 900 Joules.
Solution : Given,
Heat given to the system = +1400 J
Work done by the system = -500 J
Change in internal energy is equal to the sum of heat energy and work done.
Formula used :
where,
= change in internal energy
q = heat energy
w = work done
As per question, heat is added to the system that means, q is positive and work done by the system that means, w is negative.
Now put all the given values in the above formula, we get
Therefore, the change in internal energy is 900 J.
The change in internal energy depends on the heat energy and work done. As we will change in the heat energy and work done, then changes will occur in the internal energy. Hence, the energy is conserved.
Answer:
2.813%
Explanation:
First, we must take the average of the five mass measurements
Average value= sum of all five trials/ 5= 26.6 + 26.3 + 26.2 + 26.4 +26.1 /3 = 26.32mg
Now, we have been provided the accurate mass of the compound in the question as 25.6mg
Remember that relative percent error = Average value of measurement - True value of measurement / true value×100
Hence we have;
Percent error=
26.32 - 25.6/25.6 ×100
Percent error= 2.813%
The data indicates a direct relationship with a positive slope.
<h3>What is direct relationship?</h3>
Direct relationship is a type of relation in which if one factor increases the other will also increases and vice versa. This data represents direct relationship because the increase occur in one value causes increase of another value so we can conclude that the data indicates a direct relationship with a positive slope.
Learn more about relationship here: brainly.com/question/25862883
