BRAINLIEST A child inherits one allele for a widow's peak (W) and one allele for a straight hairline (w). The child has a widow's peak. This is because - Group of answer choices

A. Widow's peak is recessive

B. Widows peak is inherited from both parents

C. Widow's peak is dominant

D. Widow's peak is based on environmental factors

it is a good conductor

explanation:

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%