Apiece of gold wire has a diameter of .175cm. how much will precisely 1.00 x 10^5 cm of the wire weigh

The main information we have to use here is the density of gold. From literature, the density of gold at room temperature is 19.32 g/cm³. To determine the mass, let's calculate the volume first. A wire is in the shape of a cylinder. Thus, the volume would be

V = πd²h/4
V = π(0.175 cm)²(1×10⁵ cm)/4
V = 2,405.28 cm³

Density = mass/volume
19.32 g/cm³ = Mass/2,405.28 cm³
Mass = 46,470 g gold wire

Anions are negative charged ions

60.0 - there are 3 significant numbers