Here are some disadvantages, is that nitrogen dioxide is a toxic gas and it can still be harmful when ingested by human, also critics of hydrogen fuel cells argue that although these cells do not emit carbon after burning, they give out nitrogen dioxide and other emissions.
Hope this helps
Answer:
It was fused from 3 helium nuclei in the core of a red giant star long before the Sun existed
Explanation:
<h3>The equation</h3>
4.94 x c . (Tm-23.6)=C.(23-6-21.9)+123.13 x c. (23.6-21.9)
<h3>Further explanation
</h3>
The law of conservation of energy can be applied to heat changes, ie the heat received/absorbed is the same as the heat released
Q in = Q out
Heat can be calculated using the formula:
Q = mc∆T
A calorimeter is a device used to measure the specific heat of material
A metal is put into a calorimeter that contains water and there will be heat transfer:
m = metal
w = water
T = the final temperature of the mixture
mass of metal =(Nickel) = 4.94 g
mass of calorimeter = 12.5 g
mass of water = 123.13 g (135.63 - 12.5)
The equation
Q released (metal) = Q absorbed(calorimeter+water)
- Qmetal = 4.94 x c . (Tm-23.60)
- Q calorimeter = C.(23-6-21.9) --> C = heat capacity of calorimeter
- Q water = 123.13 x c. (23.6-21.9)
The equation :
4.94 x c . (Tm-23.6)=C.(23-6-21.9)+123.13 x c. (23.6-21.9)
Step 1
Gas here is assumed to be ideal. Then, the next equation is applied:
-----------------------------------------
Step 2
<em>Information provided:</em>
p = pressure = 3.25 atm
V = volume = 3.00 L
n = number of moles = unknown
T = absolute temperature = 300.0 K
R = gas constant according to the units = 0.082 atm L/mol K
-----------------------------------------
Step 3
n is found from (1):
Answer: C) n = 0.396 moles
B
If both ping-pong balls had the same charge (such as positive and positive or negative and negative) they would still repel each other, which explains why C and D are incorrect.
Also, opposites attract, so if one was positive while the other was negative they'd attach to one another, which is why B is correct