Answer:
5.5 grams
Explanation:
To find how much of the isotope remains, you need to use the half-life equation:
In this equation,
-----> N(t) = remaining mass (g)
-----> N₀ = initial mass (g)
-----> t = time (hrs)
-----> h = half-life (hrs)
You can find the remaining mass by plugging the given values into the equation and solving.
N(t) = ? g t = 30 hrs
N₀ = 22 g h = 15 hrs
<----- Half-life equation
<----- Insert values
<----- Simplify exponent
<----- Solve
<----- Multiply 22 and 0.25
D. Not all mixtures are heterogeneous
Cro42ag
What is the percent for the fraction nine twentieths?
1.
9%
2.
20%
3.
45%
4.
90%
They perform cellular respiration
Answer:
Compare Silicon and Sulfur on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. These similarities and dissimilarities should be known while we study periodic table elements. You can study the detailed comparison between Silicon vs Sulfur with most reliable information about their properties, attributes, facts, uses etc. You can compare Si vs S on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.