The final temperature : t=77.74 °C
<h3>Further explanation</h3>
Given
500 g coffee, t = 80 °C
110 g aluminum cup, t = 30 °C
Required
The final temperature
Solution
Q in = Q out
Q absorbed = Q released
Q aluminum cup = Q coffee
110 x 0.9 x (t-30)=500 x 4.18 x (80-t)
99t-2970=167200-2090t
2189t=170170
t=77.74 °C
Answer:
number of raisins = 19866 raisins
Explanation:
First, we will convert all volumes to liters
1- For raisins:
We know that:
1 ml = 0.001 liter
One raisin has a volume of 0.2 ml
This means that:
volume of one raisin = (0.2*0.001) / 1 = 0.0002 liters
2- For the stomach:
Now, we are given that:
1 qt = 0.946 L
Therefore:
volume of stomach = (4.2*0.946) / 1 = 3.9732 liters
Now, we will get the number of raisins as follows:
Assume that the number of raisins required to completely fill the stomach is x.
Therefore:
volume of stomach = x * volume of raisin
3.9732 = 0.0002x
x = 19866 raisins
Hope this helps :)
Answer:
im pretty sure the answer is number 3. The nervous system provides nutrients and oxygen for the muscular system
Explanation:
Avogadro's Constant says 1 mole of substance has 6.02214086 × 10²³ (Unit is mol⁻¹) particles.
This means, 1 mole = 6.02214086 × 10²³ molecules / atoms
Given methane molecules = 7.31 x 10²⁵
moles of methane = 7.31 x 10²⁵ / 6.02214086 × 10²³ mol⁻¹
= 121.39 mol
Hence, 7.31 x 10²⁵ of methane molecules have 121.39 moles.
