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CaHeK987
17 days ago
9

Solve without using a calculator. Substance ab2 is 60.0% a by mass. What is the percent a by mass for substance ab?

Chemistry
1 answer:
Tems11 [2.4K]17 days ago
5 0
The proportion of component A by mass for substance AB is given by 75%. Further explanation According to Proust's Comparative Law, compounds are made from elements that maintain the same Mass Comparison, ensuring that compounds have a consistent ratio of elements. The empirical formula presents the mole ratio of elements forming a compound. In the case of substance AB₂, 60.0% of its mass is attributed to A. For instance, if the mass of AB₂ is 100 grams, then the mass of A would be 60 grams, and the mass of B would be 40 grams, divided according to the coefficient in compound AB₂ which is 2, leading to 20 grams. Thus, for compound AB, the total mass is the sum of mass A and mass B, which equals 60 grams plus 20 grams, resulting in a total mass of 80 grams. Consequently, the percentage of compound A calculates to (60: 80) = 75%.
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1 month ago
How many liters of cane juice is needed to supply 5g sucrose if cane juice contains 12% sucrose
alisha [2704]

Given parameters:

Mass of sucrose  = 5g

Density of sucrose  = 1.12g/mL

Percentage of sucrose per liter of cane juice  = 12%

Unknown:

Volume of cane juice required =?

We need to understand the relationship between volume and density. Density represents mass per unit volume.

Mathematically;

                Density  = \frac{mass}{volume}

Now, calculate the volume of sucrose;

                  1.12g/mL = \frac{5}{Volume}

       Volume  = \frac{5}{1.12}    =  4.46mL   = 4.46 x 10⁻³L since 1000mL  = 1L

Since 12% of one liter of cane juice is sucrose,  

                    12% of  x  liter of cane juice  = 4.46 x 10⁻³L

                   Volume of cane juice  = 4.46 x 10⁻³ x \frac{100}{12}   = 0.037L

Volume of cane juice needed is  0.037L

   

6 0
1 month ago
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