Answer:
option (3)
Explanation:
According to the ideal gas equation
PV = nRT
where, P is pressure, V is volume, R is gas constant and T be the absolute temperature.
At constant volume,
P ∝ T
If the temperature is doubled, the pressure also doubled.
As volume is constant, so the density is also constant.
So, the pressure is doubled and the density remain constant.
You may look at what group they are in
Group
1A=Group 1
2A = Group 2
3A = Group 13
4A= Group 14
5A=Group 15
6A=Group 16
7A=Group 17
The #A tells you how many valence electrons there are by the # before A. Such as Chlorine, which is in 7A, so therefore has 7 valence electrons.
Answer:
A place where organic and non organic materials interact to make a living space
Answer:
<u>The car's average speed is 32 kilometers per hour</u>
Explanation:
1. Let's review the information given to us to answer the question correctly:
First two hours = 60 kilometers
Next two hours = 68 kilometers
2. What is the car's average speed?
Total distance traveled by the car = 60 + 68
Total distance traveled by the car = 128
Total time of travel = 2 + 2 hours
Total time of travel = 4 hours
Average speed = Total distance/Total time
Replacing with the real values, we have:
Average speed = 128/4
<u>Average speed = 32 kilometers per hour</u>