Answer:
2.44 %
Explanation:
Given that,
The calculated value of specific heat of water to be 4.29 J/g°C
The actual value of the specific heat of water is 4.18J/g°C
We need to find the percentage error of the student
Hence, the student's percent error is 2.44 %.
0.0036g of NH4+ x 1mol of NH4+/18.04g of NH4+ x 6.02*10^23 electrons of NH4+/1mol of NH4+
= 1.20 x 10^20 electrons of NH4+
Answer:
5 electrons
Explanation:
The atomic number of an element will tell you how many electrons it has in its ground state. The atomic number of boron is 5, therefore it has 5 electrons.
A mole in chemistry is defined as the number or quantity of a chemical substance that consists of as many fundamental entities such as atoms, molecules, and ions. Therefore, the statement that best describes a mole is that, it is used for directly comparing the amounts of substances.