Answer is: 1130 microliters must be administered.
activity(selenium-75) = 2.3 mCi/mL.
radioactivity(Se-75) = 2.6 mCi; mCi is millicurie.
The curie (symbol: Ci) is a non-SI unit of radioactivity.
V(Se-75) = radioactivity(Se-75) ÷ activity(Se-75).
V(Se-75) = 2.6 mCi ÷ 2.3 mCi/mL.
V(Se-75) = 1.13 mL; volume.
V(Se-75) = 1.13 mL · 1000µL/mL.
V(Se-75) = 1130 µL.
The existence of spectra can help the existence of atoms by expanding and multiplying in the law of London Dispersion
The mass is 1610 g.
Explanation:
<span>D=<span>MV</span></span>, where D is density, M is mass, V is volume
Known/Given
D=0.921 g/mL
<span>V=1.75 L×<span><span>1000mL</span><span>1L</span></span>=1750 mL</span>
Unknown
M
Equation
<span>D=<span>MV</span></span>
Solution
Rearrange the equation to isolate the mass and solve for mass.
<span>M=D×V=0.921g/mL×1750mL=1611.75 g=1610 g</span> with three significant figures.
The following diagram helps to understand how to manipulate the density equation so solve for any of the variables.
The following Density Triangle will help you determine how to solve
for any missing variable. Put your finger over the missing variable to
see what you need to do to solve for it. For example, if you need to
find volume, put your finger over the V, and you get <span>M÷D</span>.
https://www.teacherspayteachers.com/Product/Science-Journal-Density-Triangle-Foldable-Completed-4360...
