882µg x 1g/10^6µg = 8.82 x 10^-4 g
use the conversion factor 1µg = 10^-6m
8.82 x 10^-4g
La respuesta es a tu madre Ella Mai Ella Mai
Answer:
The answer is
<h2>29.48 g</h2>
Explanation:
The mass of a substance when given the density and volume can be found by using the formula
<h3>mass = Density × volume</h3>
From the question
volume of lead = 2.6 cm³
density of lead = 11.34 g/cm³
The mass of lead is
mass = 11.34 × 2.6 = 29.484
We have the final answer as
<h3> 29.48 g</h3>
Hope this helps you
Answer:
B
convex: for long sightedness
Or
A
concave: for short sightedness
Answer:
a) 128 grams
b) 81.25%
Explanation:
a) The mixture will be between the alloy and the pure copper, so the mass will be the sum of the mass of the compounds:
m = 50 + 78 = 128 g
b) In the alloy, 52% is copper, so to know the mass of copper in the alloy, we must multiply the total mass by 52% (which is 0.52)
0.52x50 = 26 g of copper
The total mass of copper in the mixture is 26 + 78 = 104 g
So, the percentual of copper is the mass of copper divided by the total mass
104/128 = 0.8125
Multiplying by 100%, to have the result in percentage
0.8125x100% = 81.25%
