Ted used a balance scale to weigh a 2.233 g sample of copper sulfate. which of these measurements made by ted is the most accurate?

2.2 g is most accurate

Since we're round to the nearest tenth (first number to the right of the decimal point) The most accurate measurement is 2.2

Hope this helps!

A) The shared electrons in C-O bonds spend less time close to the carbon nucleus than the shared electrons in C-H bonds.

Explanation:

The electronegativity from H is 2.2, from C is 2.55 and from O is 3.44. This property is the measure of the attractive force between an atom and a pair of electrons.

So, the difference of electronegativity of H and C is smaller than the difference between O and C. Because oxygen is more electronegative, the electrons stay close to it in the bond C=O. So carbon has a partial positive charge in that bond. For the bond C-H, the shared electrons stay closes to carbon.