An ore sample is found to contain 10.500000 g of cobalt and 87.3 g waste rock (gangue). What is the
percent by mass of cobalt in the ore?

Answers

Answer 1

Answer:

[tex]\% Co=10.7\%[/tex]

Explanation:

Hello!

In this case, since this is a mixture composed by cobalt and waste rock, we can compute the percent by mass of cobalt as shown below:

[tex]\% Co=\frac{m_{Co}}{m_{Co}+m_{waste}} *100\%\\\\[/tex]

Thus, we plug in to obtain:

[tex]\% Co=\frac{10.500000g}{10.500000g+87.3} *100\%\\\\\% Co=10.7\%[/tex]

Best regards!


Related Questions

Predict the chemical formula for the ionic compound formed by NH4+ and POsub4exponent3-

Answers

Formula 1!!!!!!!!!!!!!!!!!!!!!!!!!!

Help plzzz I don’t get to

Answers

I think the answer is the last one but not sure

Why is the average air temperature of Makassar warmer than the average air
temperature of Chirstchurch?

Answers

Answer:

becuase of the sun

in different places some places would be cold

Can any wan help pls pls

Answers

Answer:

1) food molecules enter receptors .....

2) The sensory receptors sends the message....

3) The message reaches the brain

4) the brain procces the information it recieved...

5) The brain stores the info  ...

6) The brain retrieves the info . ....

(I hope its clear ! I hope its right too ;) )

Which one of the following ionic solids would have the largest lattice energy?

CaBr2

CsI

CaCl2

NaCl

NaF

Answers

Answer:

CaCl2

Explanation:

The ionic solid CaCl₂ would have the largest lattice energy. Therefore, option (c) is correct.

What is the lattice energy?

Lattice energy is the heat of formation when one mole of crystalline ionic solid is generated from its constituent ions in their gaseous state.

For example, the lattice energy of sodium chloride crystal is the energy change of reaction when Na⁺ and Cl⁻ ions react to produce a NaCl crystal, which is equal to -786 kJ/mol.

The relation between lattice energy and lattice enthalpy at constant pressure is given by:

ΔU (lattice) = ΔH (lattice) - PΔV

Lattice energy is directly proportional to the charge on ions and inversely proportional to the interionic distance between ions.

For NaCl and NaF the charge on the ions is +1 and -1 while the size of the ions is small. So they have less lattice energy.

CsI ionic solid have a larger size of ions Cs⁺ and I⁻. So CsI will have less lattice energy. CsBr₂ has +2 charge on calcium but the size of both ios is larger. So, CsBr₂ will have less lattice energy.

CaCl₂ has + 2 charge on calcium as well as the ionic radius is also samll. Therefore, CaCl₂ would have the largest lattice energy.

Learn more about lattice energy, here:

https://brainly.com/question/13169815

#SPJ2

13. What is the meaning of the word faint?

Answers

To pass out , there could be MANY causes

Jewelry and tableware are sometimes made of sterling silver. Sterling silver is 92.5% silver (Ag) and 7.5% copper (Cu). If you wanted to make 30 grams of sterling silver for a ring, how many grams of silver and copper would you need to start with?
Amount of sterling silver?
Amount of copper?
total grams of alloys needed?

Answers

Answer:

12.33

Explanation:

92.5/7.5= 12.33

30g of the sterling silver ring contains, 27.75 g of silver and 2.25 g of copper.

What is cross multiplication?

Cross multiply fractions by multiplying one fraction's denominator by the other fraction's numerator and then comparing the two values. The larger fraction is the one with the higher value.

100g of sterling silver contains 92.5g of silver and 7.5g of copper.percentage of element = amount of the element present in 100 g of material

Therefore,

100g sterling silver = 92.5g silver30g sterling silver = X g silver

( cross multiplication),

100 × X = 92.5 × 30

X = 92.5 × 30/ 100

X= 27.75g silver

100g sterling silver = 7.5g copper

30g sterling silver= Y g copper

(cross multiply)

100 × Y =  7.5 × 30

Y= 7.5 × 30 / 100

Y= 2.25g copper

X (silver)= 27.75 g in 30 g of sterling silverY (copper)= 2.25 g in 30 g of sterling silver

therefore, 30g of sterling silver ring contains, 27.75 g of silver and 2.25 g of copper.

To learn motre about cross multiplication, refer to:

https://brainly.com/question/28839233

#SPJ2

Which statement describes steps involved in the production of hydroelectric power?
A. Falling water turns a turbine that helps generate electricity.
B. Moving water turns a paddle wheel that helps generate electricity.
C. Water falls down a pipe to generate electricity.
D. Potential energy of water is directly transformed into electrical energy.

Answers

A. Falling water turns a turbine that helps generate electricity

Hypothesis: What do you think will happen when you add more magnets to the set up?

Answers

Answer:

........................

True or False:


Houston, Texas received approximately 2 inches of snow on February 15, 2021. Based on this, we can now say Houston's climate consists of long, freezing winters and yearly snowfall. Please answer ASAP. Thanks

Answers

Answer:

False.

Explanation:

I majored in Chemistry

How many atoms is 45 moles of silicon (Si)?

Answers

I think 270.9. I hope this helps

pls help
Plot the point (5,9)

Answers

All u do is go to 5 and up nine and just put a little cross
go five across the x axis, then go nine straight up from there

why a “control” is important in a case-control study of a disease?

Answers

Answer:

Explanation:

Purpose of Case Control Studies

To determine whether or not an association exists between a disease and a particular risk factor. To start with a group of people with disease and work back to see whether a possible risk factor may be the cause. It may be the first step in testing a hypothesis.

To assess whether an association between a disease and a specific risk factor exists or not. Starting with a group of people with illness and working back to see if the cause could be a potential risk factor. In testing a hypothesis, this may be the first step.

how do I find the slope of this graph?​ Is it even possible?

Answers

Answer:

Not exactly But you can take the slope of the curved portion and the slope of the flatline.

It wont do you much good since your working for absorbance but if you ever see something like a temperature change you can use the slope(s) to find freezing points/melting

Explanation:

If you need to submit a slope you could use a best fit which is just point to point or you could break it up like i mentioned

An atom of carbon contains 6 total electrons. How many of these electrons are in s orbitals?
1
2
4
6

Answers

Answer:

4

Explanation:

total electrons = 6

electronic configuration = 1s^2, 2s^2, 2p^6

so in s orbital there are 4 electrons.

Hope it helps you (。◕‿◕。)

C5H12 + O2 = CO2 + H2O
If 84.3 grams of C5H12 react according to the above equation and the % yield is 94% find the actual yield of grams of carbon dioxide

Answers

Answer: 241.6 grams of CO2

Explanation: you take 84.3 grams C5H12 and divide it by 72.15 grams of C5H12(which is the molar mass) you take that answer and calculate the mols of CO2 by multiplying the 1.168 you got before and multiply it by 5. You take the answer you get from that and multiply it by the molar mass of CO2 and get the theoretical yield and then you just plug it in. 94= (x/257.02)x100 and solve to find x which is the actual yield.

Do you think genetic engineering is ethical? Explain why or why not.

Answers

Answer:

Yes

Explanation:

One of the top goals of genetic engineering is the improvement of health. Imagine a world without the threat of AIDS or cancer. Those working in the genetics field hope that manipulating the genes of humans will one day enable science to prevent people from contracting these potentially deadly diseases.

Chemical reactions happen when _____. a.atoms attract or repel one another b.heat is created by friction c. two or more substances are mixed substances are heated or d.cooled

Answers

Answer:

A

Explanation:

Explain the difference between endothermic and exothermic processes. Provide an example of each.

Answers

Exothermic reactions

These are reactions that transfer energy to the surroundings (ie the energy exits from the reaction, hence the name exothermic). The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become hotter. A thermometer is used to detect the temperature increase.

Examples:

Combustion

Neutralisation between acids and alkali

Endothermic reactions

These are reactions that take in energy from the surroundings (ie energy enters the reaction, which will help you to remember the name endothermic). The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become colder. A thermometer is used to detect the temperature decrease.

Example:

Electrolysis

WILL GIVE BRAINLIEST!!!


Use this media to help you complete the question.

There are three known forms of hydrogen. These forms are called (isotopes, ions, copies) of each other. Each of these forms will have the same number of (neutrons, protons, electrons) but different numbers of (neutrons, protons, electrons) in their nuclei.

Answers

Answer:

Isotopes, protons, netrons

Explanation:

Answer:

There are three known forms of hydrogen. These forms are called Isotopes of each other. Each of these forms will have the same number of protons but different numbers of neutrons  in their nuclei.

Explanation:

determine the empirical and molecular formulas of a compound that gives the following analysis in math percent: 24.27% C,4.07% H, and 71.65%CL. the molar mass is known to be 197.92g/mol.​

Answers

Answer:

help me with this

Explanation:

Elements are solid liquid and gas substance that can be found on earth which statements best describes an element

Answers

Answer:

i guess

Explanation:

we will never know

An artificial reef is intended to affect the ocean ecosystem by — А A removing pollution from the water B В providing shelter for marine organisms causing sediment to erode into deeper waters D preventing people from overfishing along the shore​

Answers

Answer:

B

Explanation:

just answered

An artificial reef is intended to affect the ocean ecosystem by providing shelter and habitat for marine organisms causing sediment to erode into deeper waters. Hence, option C is correct.

What is artificial reef ?

An artificial reef is a human-made underwater structure, typically constructed with the purpose of enhancing marine biodiversity, providing habitat for marine organisms, and promoting recreational activities like fishing, diving, and snorkeling.

Artificial reefs can be created from a variety of materials, such as concrete, metal, tires, and sunken ships. The reef structure can also increase the overall biodiversity of an area by creating a new habitat for species that may not have been present before.

Additionally, the presence of an artificial reef can help to reduce pressure on natural reefs by providing an alternative location for fishing and other activities. However, artificial reefs are not typically used as a means of removing pollution from the water or preventing erosion.

Therefore, option C is correct.

Find more on artificial reef:

https://brainly.com/question/17238115

#SPJ2

Which periodic table has the elements placed in locations that match the information on the flash card? ​

Answers

Answer:

https://quizizz.com/admin/quiz/5902a3fd8d05b2100088880a/cat-1-chemistry-review

Explanation:

Answer:

atomic? hope this helps!

Explanation:

In a graph, what effect would adding a catalyst have on D?

A. It would decrease.
B. It would increase.
C. It would stay the same.
D. You cannot tell from this graph.

Answers

It would decrease hope this helps

Answer:

C. It would stay the same

Explanation:

PLATO answer

A bone contains 6.25% of Carbon -14 it began with. How old is the bone ?

Answers

Answer:

Is there a multiple choice??

Explanation:

How many atoms is 45 moles of silicon (Si)?

Answers

I think it’s 270.9. Hope this help

The energy associated with a current is called____________

(A) mechanical energy
(B) magnetism
(C) geothermal energy
(D) electrical energy

Answers

Answer:

D. Electrical energy

Explanation:

I assume you are talking about an electrical current.

(These are by what I know and are simplified, not an exact definition)

A. Mechanical energy is energy that something has because of motion.

B. Magnetism is the attracting and repulsing forces between magnets.

C. Geothermal energy is heat inside of the Earth. Used as source of power.

D. Electrical energy is the result of an electric charge.

Pls help I’ll mark brainliest pls pls pls

Answers

The tea was no longer hot or (brewed) so the 5th didn’t dissolve like the others because the tea was hot or warm enough anymore it cooled down. So the sugar won’t dissolve no more.

Answer:

the tea was not hot sugar dissolves quickly and hot water than cold

1.I make my cup of coffee in the morning by pouring boiling water over ground-up coffee beans held in a special piece of paper and by collecting the brown liquid that comes through. Which techniques of the five described in the background section is/are used in the preparation of the cup of coffee

Answers

Answer:

Filtration

Explanation:

Filtration is a physical separation technique that is used to separate solids from liquids or gases. The process involves the use of a filter which allows just the liquid to pass through.

In this case, the coffee beans is the solid and the boiling water is the liquid. The special piece of paper is the medium (filter) through which the coffee is collected.

The coffee coming through the special piece of paper (filter) is called a filtrate.

Filtration is used in the preparation of the cup of coffee.

Other Questions
Which of thefollowing numbersis written inCORRECTscientific notation?Select all thatapply.Drag circles ontoeach answerchoice. A) 30 x 10^2B) 1.7 x 10^-12C) 6 x 10^-7D) 0.3 x 10^-3E) 10 x 10^10F) 2.4 x 10^8 Can someone plz help me with this one problem!!!! Im being timed melanie walks 2 large dogs and 8 small dos as part of her dog walking business the simplified ratio of large dogs to small dogs is Help ! please ! with 13, 14, 15, 16, 17, 18, 19, 20, 21, who was the first president What is the sum of (4x2+5x 12) + (7x2 6x + 7)? What is the meaning of Social and Economic justice? Which of the following BEST describes the rule of four ? Newton's Law of Gravity says that any the effect of gravity between two objects depends on what two factors? What did Harry Hess discover that helped prove that tectonic plates are moving? In the tropical rainforests, birds have evolved to eat the brightly-colored fruits. The fruits have evolved their attractive color so the birds will eat them and spread their seed. What theory is this an example of? A artificial selection b coevolution c mutation d natural selection What is the best unit of measure for gasoline QUICK whoever gives right answer gets brainliest what is the most important tool in drafting? Explain. when Kevin is on Max's shoulders they are called "Freak the Mighty." Why are they called this? What periodic element is from france :WHAT. What makes an individual or group of people belong to upper, middle, or lower class?Explain the basis for your answer. Era domingo y como de costumbre todos los miembros de la familia se habanreunido en la casa de los abuelos. Haban decidido tener un da de descanso y as, despus deuna sabrosa comida con paella, cochinillo asado y ensalada acompaada de vino tinto, sequedaron en el comedor.No tenan ganas de hacer nada ms que charlar y bromear. Cada persona comparti unchiste y ahora le toc el turno al abuelo Ral.Mientras l les relataba una historia de su aventurera juventud, Alfredo, su nieto decinco aos, trat ansiosamente de interrumpirlo para decirle que alguien estaba metiendo unpalo por la ventana. Todos estaban tan entretenidos con el cuento del abuelo que no lehicieron caso.Ms tarde Ral decidi ir a preparar unos churros con chocolate caliente en la cocinapara toda la familia. Al voltearse, se sorprendi cuando vio el palo con un recado colgado dela ventana. El recado deca:Aqu tiene su billetero. La prxima vez asegrese que tenga dinero.L Why did the United States wage war with American Indians throughout the 19th century? What is the elevation at the peak of sugar Loaf mountain Help meee 10 + (2 x 3)2 4 (3 x 1/2)?