Unwanted elements are removed from metals by a process called
a. mining
b. fission
c.refining
d. recycling​

Answers

Answer 1

Answer:

C. Refining

Explanation:

Refining process removes elements from a substance


Related Questions

What does absolute zero physically mean at the particle level?
ASAP!

Answers

Answer:

Absolute zero is the lowest limit of the thermodynamic temperature scale, a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value, taken as zero kelvin.

Find the mole fraction of Methanol CH3OH and water in a solution prepared by dissolving 4.5 g of alcohol in 40 g of H2O.

Answers

Calculations a technician performs for the CSP should be located on the O a) standard operating procedure (SOP). b) master formulation record (MFR). O) compounding record (CR). d) quality assurance

In this circuit, energy is transferred from a battery to a circuit wire and then to a light bulb, where some of it leaves the system. Starting from the battery, which series shows the correct order of energy transformations taking place in this circuit?

light and heat
chemical
electrical

put them in order

Answers

Answer:

chemical electrical light heat

b. How many grams of H20 is needed to react with 20.0 grams of P4010
P4010 + 6H20 -----> 4H3PO4

Answers

20

12 3.2

12bw

7. A certain music box ha the shape of a cube. Ea

cm long. What is the surface area of the box?

8. Find the amount of tin needed to make a milk to

cm and a height of 5cm.

9. Angelo is wrapping a present. The box he is using is

of 10 cm, a width of 7 cm and a height of 5 cm. Find

gift wrapper he needs to wrap the entire box?

10.

The side of the a cube measures 12 cm. Sc

a

In picture 4, the net force on the car is mostly the result of? A. Gravity. B. Constant velocity. C. Wind. D. Friction.

Answers

Answer:

D beacuse I think that's Force

Solid Snake is being chased up the communications tower. Solid Snake is 75 kg and is carrying 18 kg of equipment. If Solid Snake climbs 27 flights of stairs, each 5.5 m in height, how much work was done against gravity?

a.
4.04 kJ

b.
109.15 kJ

c.
135.34 kJ

d.
5.01 kJ

Answers

Solid Snake (75 kg) carries 18 kg of equipment. If Solid Snake climbs 27 flights of stairs, each 5.5 m in height, the work done against gravity is 135.34 kJ (c).

What is work?

In physics, work is the energy transferred to or from an object via the application of force along a displacement.

In this problem, the force that does the work is the one that opposes the weight.

Step 1: Calculate the total weight of the system.

Solid Snake is 75 kg and is carrying 18 kg of equipment. The total mass is:

m = 75 kg + 18 kg = 93 kg

We can calculate the weight using Newton's second law of motion.

F = m . g = 93 kg . 9.8 m/s² = 911.4 N

Step 2: Calculate the total displacement.

Solid Snake climbs 27 flights of stairs, each 5.5 m in height.

27 . 5.5 m = 148.5 m

Step 3: Calculate the work done.

We will use the definition of work.

w = F . s = (911.4 N) . (148.5 m) . (1 kJ/1000 J) = 135.34 kJ

Solid Snake (75 kg) carries 18 kg of equipment. If Solid Snake climbs 27 flights of stairs, each 5.5 m in height, the work done against gravity is 135.34 kJ (c).

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I need help with Discussion of chemical reaction of experiment Asp please!!

Answers

Answer:

may I help?............

If a Hh mom has an offspring with a hh dad, what is the probability that the offspring will have a dominant phenotype?

Question 2 options:

20%


10%


50%


40%

Answers

Answer:

I think 50%

Explanation:

im not really sure

What is radioactive dating in chemistry?
PLEASE HELP!!!

Answers

Radioactive dating uses the concept of half life to determine the age of something.
The general idea is that elements exist naturally as a combination of isotopes. Some isotopes are stable while others decay radioactively. The half-life of a radioactive isotope is the time required to reduce the initial quantity of the isotope by 50% through the process of radioactive decay.
Carbon 14 dating works this way. A tree growing in the past would have an equilibrium mixture of C-12 and C-14 atoms in proportions consistent with living matter today. We know this value.
When that tree dies, it no longer accumulates new carbon atoms from carbon dioxide in the atmosphere (through photosynthesis). At this point, the proportion of C-14 in the organic matter that was the tree decreases due to the decay of C-14 to an isotope of nitrogen.
When we dig up the remnants of the tree today, we can measure the proportion of C-14 to C-12 and see how much it has been reduced. From this we can calculate backwards using the half life of C-14 (5730 years) to estimate how old the remains of the tree are.

A 30.4ml sample of 2.38 M solution of KCI (molar mass = 74.55 g/mol) is prepared. How many grams of KCI are in the solution?
Do not report units in your answer. Report your answer with two places past the decimal point.

Answers

ignore this, it wont let me exit this screen/ tab for some reason..

A type of reaction that gives off energy is called

Answers

Answer:

exothermic

Explanation:

in exothermic reactions, more energy is released when the bonds are formed in the products than is used to breake the bonds in the reactants.

Calculating Moles of Particles
QUICK CHECK
How many moles of particles are formed by dissolving one mole of each of the following in water?
Ethanol
CaCl2
5 X = 1 mole(s) of particles
25 X = 3 mole(s) of particles
COMPLETE
COMPLETE
(NH4)2SO4
Sucrose
mole(s) of particles
3 X = 1 mole(s) of particles
DONE
COMPLETE
Na2HPO4
mole(s) of particles
3

Answers

Answer:

check the picture down below

Explanation:

Are two atoms of the same element identical?

Answers

Answer:

No. They typically are not identical.

Explanation:

Atom's electrons can be in different states

Answer:

NO

Explanation:

Atoms are like dna and cells they all have a different job even if they are the same element

XeF6

formula mass =

molar mass =

Answers

Answer:

Xenon hexafluoride's molar mass is about 245.28 g/mol
Formula mass is about 245.28 u.

Explanation:

So we want to find the formula mass of the XeF6 and there is a special formula for that.

You have to multiply the number of each element in XeF6 by the element's atomic mass.

The atomic mass of Xe is 131.293, and F's atomic mass is multiplied by 6, due to the 6 at the bottom. F's atomic mass is 18.998403, so we multiply the atomic number by 6, which would equal 113.990418. Round if you want, but it would equal mostly the same thing. Add it up to get ≈245.28, which is the same thing.

Therefore the formula mass of XeF6 is 245.28 u.

Explain how oxygen and carbon dioxide move with breathing.

Answers

Answer/Explanation:

With oxygen, it is what you breathe in so obviously, it is going to move around into your body. But with carbon dioxide, it is what you breathe out. When you breathe in, your body takes in the oxygen and the releases the carbon dioxide. Carbon dioxide is what plants actually consume, while they release oxygen.

I hope this helps!

-No one

PLease help me find someone who knows the answer and thank you so much I might give you brainliest if it is correct

Answers

Answer: because the hot water molecules are moving faster

Explanation: hot water=faster molecules= it spreads faster

Which statements describe the motion of the object represented by the graph? Select three options.

The object is moving away from the origin.
The object is moving towards the origin.
The object started at the origin.
The object started at 2 meters.
The object is traveling at a constant velocity.

Answers

Answer:

The object is moving away from the origin.

Explanation:

Answer:

The object is moving away from the origin

The object started at 2 meters.

The object is traveling at a constant velocity.

Explanation:

The line on the graph is moving in the upward direction which means the farther right on the graph you go the farther up the line is. The line also has a constant slope which indicates that the object is moving at a constant rate. and if you look at x=0 the y=2 so therefor the object started at 2 meters.

Nitrogen (iv) oxide is passed through the combustion tube before copper is heated.Give a reason for this?​

Answers

to generate steam which act on copper

What are the names of the positive and negative electrodes of an electrolytic cell?

Answers

In an electrolytic cell, the positive electrode is known as anode, while the negative electrone is known as cathode.

What is an electrolytic cell?

This is a type of cell that requires external electrical energy to work or to trigger a chemical reaction. This is only possible trough two types of electrodes: anode and cathode.

What is the difference between anode and cathode?

The key differene is the type of charge, cathodes are negatively charged, while anode are positively charged.

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How many grams of FeCo3 will be produced from 57.2g FeCl2

Answers

Answer:

             287.30 g of FeCO₃

Solution:

The Balance Chemical Equation is as follow,

                           FeCl₂ + Na₂CO₃    →    FeCO₃ + 2 NaCl

Step 1: Calculate Mass of FeCl₂ as,

                            Molarity  =  Moles ÷ Volume

Solving for Moles,

                            Moles  =  Molarity × Volume

Putting Values,

                            Moles  =  2 mol.L⁻¹ × 1.24 L

                           Moles  =  2.48 mol

Also,

                            Moles  =  Mass ÷ M.Mass

Solving for Mass,

                            Mass  =  Moles × M.Mass

Putting Values,

                            Mass  =  2.48 mol × 126.75 g.mol⁻¹

                            Mass =  314.34 g of FeCl₂

Step 2: Calculate Mass of FeCO₃ formed as,

According to equation,

          126.75 g (1 mole) FeCl₂ produces  =  115.85 g (1 mole) FeCO₃

So,

               314.34 g of FeCl₂ will produce  =  X g of FeCO₃

Solving for X,

                     X =  (314.34 g × 115.85 g) ÷ 126.75 g

                     X =  287.30 g of FeCO₃

brainlyest pleas

All of the following are sources of air pollution EXCEPT
-mobile sources
- Factories
-scrubbers
-Landfills

Answers

Answer:

Mobile sources

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

What is the volume of 0.960 moles of sulfur trioxide?

Answers

Answer:

76.86g

Explanation:

the molar mass of sulfur trioxide is about 80.06, so 80.06 grams per mol, 0.96*80.06=76.86g

What information does Gibbs free energy give about a reaction?
A. It tells how quickly the reaction will proceed to equilibrium.
B. It tells if the reaction will proceed spontaneously or not.
C. It tells what the most stable forms of the products are.
D. It tells what the activation energy of the forward reaction is.

Answers

Answer: b

Explanation:

Identify the independent /manipulated variable

Answers

Answer:

independent- test variable

manipulated - outcome variable; if needed, there could be changes.

Explanation:

knowledge

1) Identify two different mineral nutrients present in the fertilizer
that helped the plant recover. Then, describe how each nutrient
benefits the plant.

Answers

The two different mineral elements that a fertilizer can contain are:

Phosphorus - build up of nucleic acid and ATPNitrogen- synthesis of proteins

What are fertilizers?

Fertilizers are chemical substances added to the soil in order to improve crop growth and development.

Fertilizers are artificially made to contain mineral elements that are needed by the plants. Some of the mineral elements are as follows:

PhosphorusNitrogenPottasium

Phosphorus helps in the build up of nucleic acids and ATP for energy. Nitrogen is useful in the synthesis of proteins.

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Answer:

is the answer above right? im literally struggling rn

Explanation:

Chromium reacts with bromine to produce chromium(iii) bromide

Answers

The balanced chemical equation for the reaction between chromium and bromine to produce chromium(III) bromide is:

2 Cr + 3 Br2 → 2 CrBr3

This equation shows that two chromium atoms react with three molecules of bromine to form two molecules of chromium(III) bromide.

What is a redox reaction?

A redox reaction is a type of chemical reaction that involves the transfer of electrons between reactants. The term "redox" comes from the combination of two processes during the reaction: reduction, which involves the gain of electrons by a reactant, and oxidation, which involves the loss of electrons by a reactant.

Why is the above reaction an example of a redox reaction?

The reaction is an example of a redox reaction, where reduction and oxidation occur simultaneously. Chromium is oxidized, while bromine is reduced. The reaction also shows the importance of balancing the number of atoms on both sides of the equation to ensure that the law of conservation of mass is satisfied.

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Use the process of photosynthesis and cellular respiration to describe why the drought has driven the bears into the towns.

Answers

The process of photosynthesis and cellular respiration is usually at the barest minimum when drought occurs.

What is Photosynthesis?

This is the process in which green plants manufacture their food through the presence of light energy from the Sun.

During drought, there is no water which reduces photosynthetic activity of plants. This leads to shortage of food thereby making bears to come into town in search of food.

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Which is most reactive out of calcium, potassium, and magnesium?

Answers

Answer:

As we have already discussed, reactivity of alkali metals tends to increase as you go down the group. Therefore, sodium is less reactive with water than is potassium, likewise with the alkaline metals; calcium is more reactive than magnesium

Calculate the normal concentration of a solution containing 20.8 g in 400 ml.

Answers

Answer:

52 g/L

Explanation:

First, 400 mL / 1000 = 0.4 L

20.8 g / 0.4 L = 52 g /L

Explain ionization suppressants as applied to atomic spectrometry

Answers

An ionization suppressor is an alkali metal capable of preventing ionization, which can be used in atomic spectroscopy to determine matter composition.

What is ionization?

Ionization refers to the phenomena capable of converting neutral atoms/molecules to electrically charged atoms/ions.

Ionization is a process by which radiation (e.g., alpha, beta, gamma rays) can pass energy to inert matter.

Some examples of ionization suppressors include salts of alkali metals (for example, potassium), which can be used in atomic spectroscopy to determine matter composition.

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