Answer:
A. SR
Explanation:
SR is strongtium and is an electronegative element:))
hope this helps:))
Answer:
• 1 kilocaloric equals 1000 gram calories
• 1 kilocalorie is equals to 4184 Joules of energy.
Explanation:
One kilocalorie is equals to 1000 gram calories because one kilo is equals to or have 1000 grams. One kilocalorie is equals to 4184 Joules of energy while on the other hand, one calorie is equals to 4.184 Joules of energy because one calorie is 1000 times smaller than Kilocalorie so calorie has also 1000 times lower energy than kilocalorie. Kilo is the prefix which means 1000 so we can say that One kilocalorie is equals to 1000 gram calories.
The products and reactants weigh the same since u have to balance out the equation to have an equal number of molecules on bothsides
The pressure of hydrogen gas formed is 720.8 mmHg.
<h3>What is Partial Pressure ?</h3>
The pressure exerted by a (specified) component in a mixture of gases.
We have to understand one thing that the Hydrogen, which is collected over water, will be mixed with water vapor.
This means that the total pressure of the mixture will have two components.
- the partial pressure of Hydrogen
- the vapor pressure of water at 21.5 C
The vapor pressure of water at that temperature is approximately
19.231 mmHg.
This means that
740 = 
+ 19.231
= 740-19.231
= 720.8 mmHg
Therefore the pressure of hydrogen gas formed is 720.8 mmHg.
To know more about Partial Pressure
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