Answer:
D. A coil of a toaster glowing when the toaster is switched on
Explanation:
Answer:Chemical reaction
Explanation:
The main concept that must be applied to determine the coefficients (amount of each item) is that there must be equal amounts of each element on each side of the equation. We are not destroying or creating new atoms. In this case, the unbalanced reaction formula is:
B
r
2
+
K
I
=
K
B
r
+
I
2
There are a two problems we need to solve before it will be balanced:
There are two moles of Iodine atoms (
I
) on the right side of the equation, while there is only one mole on the right side.
There are two moles of bromine (
B
r
) atoms on the left side, while there is only one on the right.
Since there are two moles of bromine atoms on the left side, we need two moles on the right as well. We can do this by adding a coefficient of two to the
'
K
B
r
'
term in the equation. Our now modified equation looks like this:
B
r
2
+
K
I
=
2
K
B
r
+
I
2
There is one mole of Iodine atoms on the left, and two on the right. To fix this, we add a coefficient of two to the
'
K
I
'
term. The resulting equation is below.
B
r
2
+
2
K
I
=
2
K
B
r
+
I
2
Bonus step: We can also put ones in front of the coefficient-less species. This is like changing a phrase from "an apple" to "1 apple". It is the exact same thing, but makes it a little more clear sometimes. This would like like this:
1
B
r
2
+
2
K
I
=
2
K
B
r
+
1
I
2
Can you see that there is now an equal amount of each element on each side of the equation? That means that it is balanced.
The characteristics of the graphic representation are to find the scales and make the best graphic, in the attachment we have the points plotted
The graphical representation is one of the best methods to see the relationships between groups of data and to be able to find the functional relationships between them.
In this case, it is requested to make a scatter plot where the measured temperature is placed on the x-axis and the heat on the y-axis.
In the attachment we can see a graph with the requested data, the most important part of finding these graphs is looking for the scales
x-axis
scale x = 
y-axis
scale y = 
In general, the paper is 20 x 30 cm, we select the shortest part as the x axis
scale x = 
scale x = 1º 
Let's find the scale on the axis and the maximum value is 54000 and the minimum value is 3800, as the minimum value is much less than the maximum value, let's set this value to zero
scale y = 
scale y = 1800 
To facilitate marking the values, we select a slightly larger scale,
Selected scale
scale y = 2000 \frac{j}{cm \ paper}
Let's mark the points.
From observing these graph we see;
- The relationships are linear
- For the same material the amount of heat necessary to reach the same temperature is proportional to the mass of the material
Using the characteristics of the graphical representation, it is possible to find the scales and make the best graph
Learn more here: brainly.com/question/12511806
From the calculations and by the use of Boyles law, the new pressure of the gas is 1.7 atm
<h3>What are gas laws?</h3>
The term gas law is used to demonstrate the relationship between the volume, pressure, number of moles and temperature of a gas.
Using the Boyles law;
P1 = 1 atm
P2 = ?
V1 = 6 L
V2 = 3.5 L
P1V1= P2V2
P2= P1V1/V2
P2= 1 atm * 6 L/3.5 L
= 1.7 atm
Learn more about Boyles law:brainly.com/question/1437490
#SPJ1
Answer:
Explanation:
<u>1) Data:</u>
a) V = 500.0 ml = 0.500 liter
b) M = 0.100
c) mass = ?
<u>2) Formulae:</u>
a) Molarity: M = n / V
b) Number of moles: n = mass in grams / molar mass
<u>3) Solution</u>
a) M = n / V ⇒ n = M × V = 0.1000 M × 0.500 liter = 0.0500 mol
b) molar mass NaCl = 58.443 g/mol
c) mass = n × molar mass = 0.0500 mol × 58.443 g/mol = 2.92 g
Answer: 2.92 g
