Answer:
empty space in the atoms present in the gold foil
Answer:
A. The same amount of heat is absorbed in both the experiments because the product of mass, specific heat capacity, and change in temperature are equal for both.
Explanation:
- The amount of heat absorbed by water (Q) can be calculated from the relation:
<em>Q = m.c.ΔT.</em>
where, Q is the amount of heat absorbed by water,
m is the mass of water,
c is the specific heat capacity of water (c = 4.186 J/g °C),
ΔT is the temperature difference (final T - initial T).
- <u><em>For trial 1:</em></u>
m = 30.0 g, c = 4.18 J/g °C, ΔT = 40.0 °C – 0.0 °C = 40.0 °C
<em>∴ Q = m.c.ΔT</em> = (30.0 g)(4.18 J/g °C)(40.0 °C) = <em>5023 J.</em>
- <u><em>For trial 2:</em></u>
m = 40.0 g, c = 4.18 J/g °C, ΔT = 40.0 °C – 10.0 °C = 30.0 °C
<em>∴ Q = m.c.ΔT</em> = (40.0 g)(4.18 J/g °C)(30.0 °C) = <em>5023 J.</em>
<em>A. The same amount of heat is absorbed in both the experiments because the product of mass, specific heat capacity, and change in temperature are equal for both. </em>
Answer:
<h2>The answer is 2.52 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula
From the question
mass of object = 15.9 g
volume = final volume of water - initial volume of water
volume = 56.3 - 50 = 6.3 mL
It's density is
We have the final answer as
<h3>2.52 g/mL</h3>
Hope this helps you
pH of the solution is calculated using the following formula:
![pH=-log{[H^{+}]}](https://tex.z-dn.net/?f=pH%3D-log%7B%5BH%5E%7B%2B%7D%5D%7D)
Here, ![[H^{+}]](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D)
is concentration of hydrogen ion.
Initial value of pH is 6.7, calculate concentration of hydrogen ion from this as follows:
![[H^{+}]=10^{-pH}](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D%3D10%5E%7B-pH%7D)
Putting the value,
![[H^{+}]=10^{-6.7}=1.9952\times 10^{-7}](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D%3D10%5E%7B-6.7%7D%3D1.9952%5Ctimes%2010%5E%7B-7%7D)
Thus, initial concentration of hydrogen ion is 
.
Now, final pH value is 8.7, calculate concentration of hydrogen ion as follows:
![[H^{+}]=10^{-8.7}=1.9952\times 10^{-9}](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D%3D10%5E%7B-8.7%7D%3D1.9952%5Ctimes%2010%5E%7B-9%7D)
Thus, final concentration of hydrogen ion is 
.
The ratio of final to initial value will be:
Thus, if pH increases from 6.7 to 8.7, concentration of hydrogen ion becomes 
of the initial value.
Answer: no
Explanation: theres a chance but generally no because there can be different substances in different amounts which can have similar volumes
