If Dylan has 8.50 x 10^3 pounds of 18k gold, how much 12 k gold must...

If Dylan has 8.50 x 10^3 pounds of 18k gold, how much 12 k gold must he mix with the 18k gold to obtain 63% pure gold?

Solutions

Expert Solution

Answer – We are given mass of 18 K gold = 8.50 *10³ lb, mass percent pf pure gold = 63 % , mass of 12 K gold = ?

We know the mass of pure18 K gold and we need to calculate mass of 12 K gold which we need to mix in 18K gold. After mixing the 12 K gold there is mass percent of pure 18K gold is 63 %, so

Mass Percent of 18 K gold = mas of 18 K gold / total mass of mixed gold * 100 %

Total mass of mixed gold = mas of 18 K gold / Mass Percent of 18 K gold * 100 %

= 8.50 *10³ lb / 63 % * 100 %

= 1.349 *10⁴ lb

Now we know mixed mass of gold is = mass of pure 18 K gold + mass of 12 K gold

So, mass of 12 K gold = Total mass of mixed gold – mass of pure 18K gold

= 1.349 *10⁴ lb - 8.50 *10³ lb

= 4.99*10³ lb

So, 4.99*10³ lb of 12 k gold must he mix with the 18k gold to obtain 63% pure gold.

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

A consumer has 10 pounds of gold and 20 pounds of silver. The price of gold...

A consumer has 10 pounds of gold and 20 pounds of silver. The price of gold ?) = $4,000 a pound while the price of silver ?* = $1,000 a pound. Gold and silver are the only two goods that can be consumed. Write down the budget constraint of this consumer and draw it on a graph. Suppose that the price of silver increases to $2,000 a pound. Draw the new budget constraint. Has the purchasing power of our consumer...

3) Gold-198 has a half-life of 2.7 days. How much of a 662.5 mg gold-198 sample...

3) Gold-198 has a half-life of 2.7 days. How much of a 662.5 mg gold-198 sample will remain after 13.5 days?

How much of each a 10% gold alloy and a 24% gold alloy should be mixed together to make 40 grams of a 22% gold alloy?

How much of each a 10% gold alloy and a 24% gold alloy should be mixed together to make 40 grams of a 22% gold alloy? A cold water faucet can fill the bath tub in 12 minutes, and a hot water faucet can fill the bath tub in 18 minutes. The drain can empty the bath tub in 24 minutes. If both faucets are on and the drain is open, how long would it take to fill the...

At 2300 K the value of K of the following reaction is 1.5 x 10-3: N2(g)...

At 2300 K the value of K of the following reaction is 1.5 x 10-3: N2(g) + O2(g) ↔ 2NO(g) At the instant when a reaction vessel at 2300K contains 0.50M N2, 0.25M O2, and 0.0042M NO, by calculation of the reaction quotient (Q), is the reaction mixture at equilibrium? If not, in which direction will the reaction proceed to reach equilibrium?

(10-12) After discovering a new gold vein in the Colorado mountains, CTC Mining Corporation must decide...

(10-12) After discovering a new gold vein in the Colorado mountains, CTC Mining Corporation must decide whether to go ahead and develop the deposit. The most cost-effective method of mining gold is sulfuric acid extraction, a process that could result in environmental damage. Before proceeding with the extraction, CTC must spend $900,000 for new mining equipment and pay $165,000 for its installation. The gold mined will net the firm an estimated $350,000 each year for the 5-year life of the...

Given that K a1 =5.9 x 10 −3 and K a2 =6.0x10 −6, calculate the pH...

Given that K a1 =5.9 x 10 −3 and K a2 =6.0x10 −6, calculate the pH after titrating 70 mL of 0.10 M H2SO3 with 50 mL of 0.10 M KOH. Consider the titration of 30 mL of 0.10 M H2CO3 with 50 mL of 0.10 LiOH. What would the pH be if K a1 =6.0×10 −3 and K a2 =5.9×10 −7?

How much must be saved at the end of each year for the next 10 years...

How much must be saved at the end of each year for the next 10 years in order to accumulate $50,000, if you can earn 9% annually? Assume you contribute the same amount to your savings every year. $3,291.00 A $3,587.87 B $4,500.33 C $4,587.79 D

Consider the series X∞ k=3 √ k/ (k − 1)^3/2 . (a) Determine whether or not...

Consider the series X∞ k=3 √ k/ (k − 1)^3/2 . (a) Determine whether or not the series converges or diverges. Show all your work! (b) Essay part. Which tests can be applied to determine the convergence or divergence of the above series. For each test explain in your own words why and how it can be applied, or why it cannot be applied. (i) (2 points) Divergence Test (ii) Limit Comparison test to X∞ k=2 1/k . (iii) Direct...

When measured in a 1.00 cm cuvet, a 8.50 x 10-5 M solution of species A...

When measured in a 1.00 cm cuvet, a 8.50 x 10-5 M solution of species A exhibited absorbances of 0.129 and 0.764 at 475 nm and 700 nm, respectively. A 4.65 X 10-5 M solution of species B gave absorbances of 0.567 and 0.083 at 475 nm and 700 nm, respectively. Both species were dissolved in the same solvent, and the solvent's absorbance was 0.005 and 0.000 at 475 nm and 700 nm, respectively, in either a 1 or 1.25...

When measured in a 1.00 cm cuvet, a 8.50 x 10-5 M solution of species A...

When measured in a 1.00 cm cuvet, a 8.50 x 10-5 M solution of species A exhibited absorbances of 0.129 and 0.764 at 475 nm and 700 nm, respectively. A 4.65 x 10-5 M solution of species B gave absorbances of 0.567 and 0.083 at 475 nm and 700 nm, respectively. Both species were dissolved in the same solvent, and the solvent's absorbance was 0.005 and 0.000 at 475 nm and 700 nm, respectively, in either a 1 or 1.25...

Subjects