admin

21.07.2022 - 07:54

For cobalt (II) bromide hexahydrate the percentage of H_2O present is 33.0 percent write the formula and molecular weight.

Question:

For {eq}\displaystyle rm cobalt (II) bromide hexahydrate {/eq} the percentage of {eq}\displaystyle rm H_2O {/eq} present is {eq}\displaystyle rm 33.0 % {/eq} write the formula and molecular weight.

Answers (1)

Chloe April 14, 2023 в 23:53

The formula for cobalt (II) bromide hexahydrate is CoBr2·6H2O. The molecular weight can be calculated by adding the atomic weights of each atom in the formula: for CoBr2: (1 x atomic weight of Co) + (2 x atomic weight of Br) = (1 x 58.93) + (2 x 79.90) = 218.73 g/mol for 6H2O: (6 x (2 x atomic weight of H)) + (6 x atomic weight of O) = (6 x (2 x 1.01)) + (6 x 16.00) = 108.00 g/mol Adding the two together gives a molecular weight of CoBr2·6H2O = 326.73 g/mol. The percentage of water present can be calculated by dividing the mass of the water by the total mass of the compound and multiplying by 100: mass of water = 6 x (atomic weight of H + atomic weight of O) = 6 x (1.01 + 16.00) = 102.06 g/mol total mass of compound = molecular weight of CoBr2·6H2O = 326.73 g/mol percentage of water = (102.06 g/mol / 326.73 g/mol) x 100% = 31.24% (rounded to two significant figures) Therefore, the given percentage of 33.0% is slightly higher than the calculated value of 31.24%, but they are both in the same ballpark.

Do you know the answer?

Leave a comment Cancel Response

Not sure about the answer?

Find the right answer to the question For cobalt (II) bromide hexahydrate the percentage of H_2O present is 33.0 percent write the formula and molecular weight. by subject Science, and if there is no answer or no one has given the right answer, then use the search and try to find the answer among similar questions.

Search for other answers

New questions in the category: Science

Poker Dice is a poker-like game that you can play with a special set of dice; thesides are marked 9, 10, J, Q, K, A, like the high cards in a deck, but without suits.Each player rolls 5 dice, and attempts to form a poker hand (unlike poker, thisgame allow

Two fire trucks have sirens that emit waves of the same frequency. As the fire trucks approach a person, the person hears a higher frequency from truck X than from truck Y. Which of the following sta

The AM1004-T61 magnesium alloy tube AB is capped with a rigid plate E. The gap between E and end C of the 6061-T6 aluminum alloy solid circular rod CD is 0.2 mm when the temperature is at 30 degree C.

How does vitamin K influence blood clotting?

Lead ions in drinking water can be removed by precipitation with sulfate ions. Suppose an aqueous solution contains lead (II) nitrate. You add an aqueous solution of potassium sulfate. Write the balanced equation, the full ionic equation, and the net ioni

Describe two groups of animals that live in leaf litter and their role in the ecosystem. How can humans impact life in leaf litter?

Referring to the given figure where V = 21 V, use source transformation to determine the current and power absorbed by the 8-Ω resistor. The current absorbed by the 8-Ω resistor is _____. The power absorbed by the 8-Ω resistor is _____

An open box is to be made from a 3ft by 8ft rectangular piece of sheet metal by cutting out squares of equal size from the four corners and bending up the sides. Find the maximum volume that the box c

What is another name for somatic stem cells?

Gold ore typically contains 10 grams of gold per 1000 kilograms of ore, and the current value of gold is $1185 per ounce. What mass of ore in tons (1 ton = 2000 pounds) must be refined to obtain $1 million worth of gold?

What is the relative location of Portland, Oregon?

What are some characteristics of the order Carnivora?

What is the world’s smallest magnet?

Solve the following problem. Be sure to make a diagram of the situation with all the given information labeled. If a 75.0-foot flagpole casts a shadow 58.0 feet long, what is the angle of elevation of the sun (to the nearest tenth of a degree)?

How do producers make their own food?

Are orangutans aggressive?

A thin copper plate of diameter 6 cm is charged to 8.40 nC. What is the strength of the electric field 0.1 mm above the center of the top surface plate? a. 2.47 times10^{5} N/C b. 1.68 times10^{5} N/C c. 3.36 times10^{5} N/C d. 4.20 time

Sir Isaac Newton revolutionized science by defining a set of laws to describe the motion of objects. In a 2 to 3 paragraph essay, describe each of Newton’s laws of motion and explain why each is important in understanding planetary motion.

Top fuel drag racer can reach the maximum speed of 304 mph at the end of the 1/4-mile (402 m) racetrack. (a) Assuming that the acceleration is constant during the race, calculate the average value of

What happens to recrystallization if a large excess of decolorizing charcoal is used?

Authorization

Password generation