6. A 7. B 8. D 9. C 10. A 11. B.
Elements in the same group in the periodic table have similar chemical properties. Hydrogen and Lithium, who both belong to alkali metal group, have the same chemical properties.
The density of zinc is 7.16 g/ml.
Density can be calculated by the formula -
Density =
In the given question, the volume of given mass of mossy zinc can be found by finding change in volume of water.
Change in volume = new volume - original volume
Change in volume = 54.6 - 50.0
Performing subtraction to find the change in volume
Change in volume = 4.6 ml
Now, keeping the values in formula to find the density of given mass of mossy zinc.
Density =
Performing division to find the density of given mass of mossy zinc
Density = 7.16 g/ml
Hence, the density of mossy zinc is 7.16 g/ml.
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I believe it’s 2 moles or iron
Explanation: Temperature Affects Density
When the same amount of water is heated or cooled, its density changes. When the water is heated, it expands, increasing in volume. ... The warmer the water, the more space it takes up, and the lower its density.