Density of blood in question means like "massa jenis" in symbol ρ (rho).

With formula:

ρ = m/v

Density of blood (ρ) = 1.06 x 10³

"If you donate" (volume) = 500 cm³ = 5*10⁻⁴ m³

Question: "mass of blood have you donated in grams" (m in gram).

Use the density formula.

ρ = m/v

1.06 * 10³ = m/5*10⁻⁴

1.06 * 10³ x 5*10⁻⁴ = m

5,3 * 10⁻¹ = m

0,53 = m

m = 0,53 kg

It is still in kilogram. Try to convert to grams.

m = 0,53 * 1000

m = 530 gram.

So, the mass of blood have "you" donated in grams is 530 grams.

Note: The term "donate" doesn't mean that the density of blood must use subtraction symbol ( - ), so it looks like density of blood - volume blood donated. That is wrong concept. This question is about around of density lesson in physics, because this question is given (diketahui) density and volume blood of what "you" donated, and you must find the mass of blood with density formula.