Answer:
When you heat an atom, some of its electrons are "excited* to higher energy levels. When an electron drops from one level to a lower energy level, it emits a quantum of energy. ... The different mix of energy differences for each atom produces different colours. Each metal gives a characteristic flame emission spectrum.
Explanation:
Answer:
12.7g of Cu
Explanation:
First let us generate a balanced equation for the reaction. This is illustrated below:
Zn + CuSO4 —> ZnSO4 + Cu
Molar Mass of Cu = 63.5g/mol
Molar Mass of CuSO4 = 63.5 + 32 + (16x4) = 63.5 + 32 + 64 = 159.5g/mol
From the equation,
159.5g of CuSO4 produced 63.5g of Cu.
Therefore, 31.9g of CuSO4 will produce = (31.9 x 63.5) / 159.5 = 12.7g of Cu
Answer:
More electronegative
Explanation:
The oxygen and nitrogen in ammonia shows that they are more electronegative than the hydrogen atoms.
- Electronegativity shows the affinity of an atom for valence electrons.
- Electronegativity is the measure of the relative tendency with which the atoms of the element attract valence electrons in a chemical bond.
The oxygen atom in water and the nitrogen atom in ammonia are more electronegative.
They attract the electrons more and they then become negatively charged.
The hydrogen will then become positively charged in the shared covalency.
Answer: low pH
Hydronium is H^+ and acids give hydronium ions to water solution.
PH = -log H^+ concentration. The higher the concentration, the lower pH value
