Answer:
81 °C
Explanation:
This is a calorimetry question so a few things you will need for this. The calorimetry equation q=mcΔT & the specific heat of water (4.2J/g•°C). Other definitions are:
q = heat added/released by a sample
m = mass of sample
c=specific heat of sample
ΔT = change in temperature
from here we can rearrange the equation to state:
q/(mc) = ΔT
1200J/((20.0g)(4.2J/g•°C)) = ΔT
14°C = ΔT
If the starting temperature was 95.0°C and we know that the temperature was cooled by 14°C then the final temperature of the water would be 81.
Answer:
To find the number of neutrons, subtract the number of protons from the mass number. number of neutrons
Explanation:
First, you need to convert kg to g.
So, 1 kg =1000g.
3.5 x 1000 = 3500g Ca(OH)2
We need to know the molar mass of Ca(OH)2.
Ca= 40.08 g
O=2(15.999)
H=2(1.0079)
Add them all together and you get 74.0938 g.
Put it in the formula from mass to moles.
# of moles = grams Ca(OH)2 x 1 mol Ca(OH)2
--------------------
molar mass Ca(OH)2
3500 g Ca(OH)2 x 1 mol Ca(OH)2
---------------------
74.0938 g Ca(OH)2
So divide 1/74.0938 and multiply by 3500.
You will get about 47.24 moles Ca(OH)2.
Hope this helps! :)
Liter. The measure for volume is m^3
Answer:
A process known as Subduction
Explanation:
In the event that two tectonic plates collide, they structure a convergent plate boundary. Typically, one of the converging plates will move underneath the other, a procedure known as subduction. Profound trenched are included frequently where tectonic plates are being subducted and earthquakes are normal. As the sinking plate moves further into the mantle, fluids are discharged from the rock making the overlying mantle to somewhat melt. The new magma ascents and may emit fiercely to frame volcanoes, regularly forming curves of islands along the convergent boundary.
