The standard atomic weight of a C is 12, and the standard atomic weight of a H is 1. So to find molar ratio of C and H in the compound: 60.0/12=5, 5.05/1=5. This means the molar ratio of C and H is 5:5, thus 1:1. Assuming the molecular formula is CnHn, to find molar mass: 12n + 1n = 78.12. n=78.12/(12+1) = 6. So the compound's molecular formula is C6H6, benzene.
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Answer:</h3>
1.0177 g/cm³
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Explanation:</h3>
We are given;
- Mass of the cube = 40 grams
- Length of the cube = 3.4 units
We are required to get the density of the cube;
- Assuming the length is 3.4 cm
- The volume of the cube is given by l³
Thus, Volume of the cube = 3.4 cm × 3.4 cm × 3.4 cm
= 39.304 cm³
But, density = Mass ÷ volume
= 40 g ÷ 39.304 cm³
= 1.0177 g/cm³
Therefore, the density of the cube is 1.0177 g/cm³
The 41 beside the chemical symbol of calcium signifies the mass number of the isotope which would be 41. It would be equal to the sum of the number of protons and neutrons in the atom. the number of proton is equal to every isotope calcium has which is 20. therefore the number of neutrons would be 21. since it is being states the atom is neutral, the number of electrons would be equal to protons which is 20.