Explanation:
<h2>(a).</h2>
The density of a substance can be found by using the formula

From the question
mass of metal = 14 g
volume = 2.98 mL = 2.98 cm³
It's density is

We have the answer as
4.70 g/cm³
<h2>(b).</h2>
The metal is not copper since it's density is less than that of copper.
Hope this helps you
1) Acidic - gastric juices pH 1, lemon juice pH 2.2, tomato juice pH 4.
2) Neutral - salt solution pH 7.
3) Alkaline - baking soda pH 9, bleach pH 13.
pH is a numeric scale used to specify the acidity or basicity of an aqueous solution.
When pH is less than seven (pH<7), solution is acidic.
When is equal seven (pH = 7), solution is neutral.
When pH is greater than seven (pH > 7), solution is basic.
The deepest part of the ocean is the Marianas Trench, where the water pressure is 1,000 times that of which is found at sea level.