Answer:
30 cm³
Explanation:
Step 1: Given data
- Density of aluminum (ρ): 2.7 g/cm³
- Mass of aluminum (m): 81 g
- Volume occupied by aluminum (V): ?
Step 2: Calculate the volume occupied by aluminum
The density of aluminum is equal to its mass divided by its volume.
ρ = m/V
V = m/ρ
V = 81 g / 2.7 g/cm³
V = 30 cm³
Wegener suggested that perhaps the rotation of the Earth caused the continents to shift towards and apart from each other. (It doesn't.) Today, we know that the continents rest on massive slabs of rock called tectonic plates. The plates are always moving and interacting in a process called plate tectonics.
No. You can pour a powdered juice mix in water,and when fully dissolved it will become one. You can also leave the water to evaporate and the powdered juice mix will still be in the jug. This is a physical property which is called solubility.
Answer:
ionic bond
Explanation:
Noble gases have complete octet. The elements near to noble gases gain electrons and get stable electronic configuration by completing the octet.
Consider the example of halogen element:
Ionic bond:
It is the bond which is formed by the transfer of electron from one atom to the atom of another element.
Both bonded atoms have very large electronegativity difference. The atom with large electronegativity value accept the electron from other with smaller value of electronegativity .
For example:
Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion. Chlorine have seven valance electrons and sodium have one valance electron. To complete the octet sodium lose its one electron and chlorine accept one electron and form ionic compound.
2C₇ H₆O₂ + 15O₂ → 14CO₂ + 6H₂O
Explanation:
Balancing the chemical equation ensures that reactions are based on the law of conservation of mass.
According to the law, we must ensure that the amount of species on both sides of the equation must be the same.
The reaction given is a combustion reaction:
C₇ H₆O₂ + O₂ → CO₂ + H₂O
let us balance this equation using mathematical approach.
aC₇ H₆O₂ + bO₂ → dCO₂ + eH₂O
a,b,d and e are the coefficients that will balance the equation.
Conserving C: 7a = d
H: 6a = 2e
O: 2a + 2b = 2d + e
let a = 1
d = 7
e = 3
b =
multiply through by 2;
a = 2, b = 15, d = 14, e = 6
2C₇ H₆O₂ + 15O₂ → 14CO₂ + 6H₂O
learn more:
Balancing equation brainly.com/question/2947744
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