Answer:
0.583 kilojoules
Explanation:
The amount of heat required to pop a single kernel can be calculated using the formula as follows:
Q = m × c × ∆T
Where;
Q = amount of heat (J)
m = mass of water (g)
c = specific heat capacity of water (4.184 J/g°C)
∆T = change in temperature
From the given information, m = 0.905 g, initial temperature (room temperature) = 21°C , final temperature = 175°C, Q = ?
Q = m × c × ∆T
Q = 0.905 × 4.184 × (175°C - 21°C)
Q = 3.786 × 154
Q = 583.044 Joules
In kilojoules i.e. we divide by 1000, the amount of heat is:
= 583.04/1000
= 0.583 kilojoules
Answer:
The answer is D. The Sun is the closest star to Earth and so it seems brighter than distant stars that have much greater absolute brightness.
Explanation: Stars like red super giants like beetleguise are way brighter and bigger than the sun, but the sun is closest to the earth. It is only in its main sequence stage but seems bright because of its short distance from the sun( 93 million miles).
I'll balance it for you :D
HNO3 + P → <span>H3PO4 + NO
break it down first (to see how many of each atom on each side) so
H- 1 H-3
N-1 N-1
O-3 O-12
P-1 P-3
now u gotta make the numbers equal on both sides
make the first H 3 so it's balanced with the other one by putting a 3 in front of it in the equation like this:
</span>3HNO3 + P → H3PO4 + NO
<span>
that changes the WHOLE equation except the P because it's not attached (so now the N is also 3 and the O as well)
</span>H- 3 H-3
N-3 N-1
O-9 O-12
P-1 P-3
so now the N is imbalanced on the product side, so do the same thing to fix it
3HNO3 + P → H3PO4 + 3NO
the O next to the N is now also 3 sooo
H- 3 H-3
N-3 N-3
O-9 O-15
P-1 P-3
3HNO3 + 3P → H3PO4 + 3NO
H- 3 H-3
N-3 N-3
O-9 O-15
P-3 P-3
3HNO3 + 3P → H3PO4 + 3NO
i realized halfway through this that the O is still unbalanced SOMEHOW
