This is known as the element IR. (<span>Iridium) Iridium has the atomic number of 77 therefore has </span>
"77 protons, 77 electrons, and 116 neutrons." You can figure out how many protons and electrons a element has by looking at the atomic number. In this case the atomic number is 77 therefore it will have 77 protons and electrons!
Hope this helps!
Answer:
Explanation:
Heat of reaction or enthalpy change is the energy released or absorbed during the course of the reaction.
It is calculated by subtracting the enthalpy of reactants from the enthalpy of products.
= enthalpy change = ?
= enthalpy of products
= enthalpy of reactants
For the given reaction :
Answer:
2 significant figure is 13.1 aluminium
Answer:
0.001341 mol/L s is the average rate from 8.0 to 20.0 seconds.
Explanation:
Average rate of the reaction =
=Average rate of the reaction during the given time interval.
= Change in concentration of reactant with respect to time.
= Change in time.
=Concentration of reactant at time
=Concentration of reactant at time
So, at the concentration of :
And at the concentration of :
The average rate of the reaction at given interval will be given as:
0.001341 mol/L s is the average rate from 8.0 to 20.0 seconds.
Answer:
The area of parallelogram can be found by product of its base and height. The calculations are shown below:
Explanation:
We know that,
Area of parallelogram = base × height
assume base to be 21 cm.
Then,
sin 79° =
∴ height = 13 × 0.98 = 12.74
Area of parallelogram = 21 × 12.74
= 267.54
The area of parallelogram is calculated as 267.54 .