what is the numerical value of gold silver and platinum?

Answers

Answer 1
Platinum:

850 Platinum: 85% platinum
950 Platinum: 95% platinum
900 Platinum: 90% platinum

Gold:

24 karat: 99.9% gold; the purest form.
22 karat: 91.7% gold
18 karat: 75% gold
14 karat: 58.3% gold
10 karat: 41.7% gold

Related Questions

HELP ME ASAP!

what are some acidic experiments and what information will the experinments provide? And how is it important to do those exerinement?

Answers

Answer:

The pH scale measures whether there is more hydronium or hydroxide in a solution. In other words, it tells us how basic or acidic the solution is. A lower pH means something is more acidic, also known as a stronger acid. A higher pH means it is more alkaline or a stronger base.

What you prefer cat or dog or pig?​

Answers

Answer:

dog

Explanation:

cats hide and break stuff pigs will probally stay outside all day and i ove dogs

I prefer a pig

Benefits of having a pig

- you can eat them

- they taste good

- they have bacon

- Richard

- they are good to eat

- they taste very good because of the bacon

- you can cook them

- they are good cooked

How much would a 10 kg suitcase weigh on the surface of…? a. The Moon b. Mars c. Saturn d. Pluto

Answers

Answer:

Is this the full question

Explanation:

Reply or love the message so i can get a notification

Chromium (lII) sulphate reacts with potassium carbonate to form chromium (III) carbonate and potassium
sulphate.
Skeleton equation:

Answers

Cr2(SO4)3 + 3K2CO4 -> Cr2(CO4)3 + 3K2SO4

Answer:

Cr2(SO4)3+K2CO3---------------->Cr2(CO3)3+K2SO4

BALANCING

Cr2(SO4)3+3K2CO3------------------------->Cr2(CO3)+3K2SO4

Explanation:

Which of these potential sources of water pollution is excluded from the clean water act

Answers

Answer:

C. Agricultural runoff

Explanation:

sorry  if not helps if do im am sooooo happy

How is permeability related to the size of the grains that make up the sediment?

Answers

Answer:

In poorly sorted sediments, those with a larger range of grain sizes, the finer grains tend to fill the spaces between the larger grains, resulting in lower porosity. Primary porosity can range from less than one percent in crystalline rocks like granite to over 55% in some soils.

Explanation:

in titration, 25 mL of 0.2M NaOH neutralizes 20mL of HCl, what is the concentration of the HCl?

Answers

The concentration of the HCl solution needed to neutralize 25 mL of 0.2 M NaOH is 0.25 M

Balanced equation

HCl + NaOH —> NaCl + H₂O

From the balanced equation above,

The mole ratio of the acid, HCl (nA) = 1The mole ratio of the base, NaOH (nB) = 1

How to determine the concentration of HCl Volume of base, KOH (Vb) = 25 mLConcentration of base, NaOH (Cb) = 0.2 MVolume of acid, HCl (Va) = 20 mL Concentration of acid, HCl (Ca) =?

CaVa / CbVb = nA / nB

(Ca × 20) / (0.2 × 25) = 1

(Ca × 20) / 5  = 1

Cross multiply

Ca × 20  = 5

Divide both side by 20

Ca = 5 / 20

Ca = 0.25 M

Thus, the concentration of the HCl solution is 0. 25 M

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Silver + ... → Silver oxide​

Answers

Answer:

Silver+ Hydroxide--> Silver oxide+ Water

What happens to the density of group 1 when you go down the group

Answers

the density increases down the group.

Perrhenic acid reacts with potassium hydroxide. Complete the word equation for this reaction. perrhenic acid + potassium hydroxide ——> potassium perrhate + _______

Answers

Answer:

I am first time from from from from from from

pls help!!! Three resistors are arranged in parallel with a voltage source. The values are 2 Ω, 5 Ω, and 7 Ω. Which branch will have the MOST current?

Answers

Answer:

The 2 ohm branch

Explanation:

Since the resistors are in parallel, they are each connected to the same volatage.   Since   I = V/R    you can see that the one with the smallest resistance will have the greatest current through it .

In another experiment the student turreted 50.0

Answers

Answer:

is this a full question ????

Explanation:

What can a swarm of grasshoppers do to a farmers crop?

Answers

It could destroy the crops by jumping all over them

What is virtual water?

a. water used in the production of services and goods that consumers need and enjoy

b. water used in the production of services and goods that consumers need and enjoy

c. water that has not yet fallen to Earth as precipitation and cannot be seen

d. water with low oxygen levels as a result of agricultural runoff from fields and feedlots

Answers

Virtual water is water used in the production of services and goods that consumers need and enjoy.

So, option A is correct.

Why do humans need virtual water?

Virtual water  is very important as it helps us understand the dependencies our economies have on others' resources.

In addition with the water footprint, virtual water enables us to map out the dependencies and to identify when and where risks may lie, in terms of scarcity and pollution as it's implications is found for food security, economy and diplomacy.

Virtual water is not water that has not yet fallen to Earth as precipitation and cannot be seen.

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Answer:

A and B are the same answer lol

Explanation:

Why would 60g at 10C of NaCl in 200g of water would be unsaturated?

Answers

Answer:

The amount of substance needed to saturate water increases as the temperature increases.

Explanation:

Jin listed some common thermal insulators and conductors in a chart. (attached below)



Which belongs in the area marked with an X?
A.) Iron
B.) Foam
C.) Wood
D.) Glass






Have a great rest of your day
#TheWizzer

Answers

Answer:

I would have to say the answer is A) iron. I say this because Iron is one of the most well know conductors and in the chart it as rubber and copper as the two conductors whole Air and Iron should be the x. Plus the rest don't make good conductors they are more insulators. So logicaly it wouldn't make sense to have any of the other answers.

Explanation:

Hope This Helps

Have A Great Day

~Zero~

According to the concept of conduction, iron  belongs in the area marked with an X.

What is conduction?

Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.

In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .

When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:

1) heat conduction

2) electrical conduction

3)sound conduction

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Which of the following is not a suggested strategy for treating or preventing a communicable disease?

Get vaccinated to prevent infection from a virus.
Receive a vaccine while you are ill from a virus.
Get tested for a suspected infectious disease.
Use hand sanitizer if soap isn't available.

Answers

The strategy that is not a suggested way of treating or preventing a communicable disease is to receive a vaccine while you are ill from a virus.

Treatment and prevention of communicable disease

A communicable disease is a type of disease that can spread from one person to another in the following ways:

contact with blood and bodily fluids;

breathing in an airborne virus, or

being bitten by an insect.

There are various ways to prevent the spread of communicable diseases which include:

Immunization against infectious diseases,

washing of hands regularly or the use of hand sanitisers if soap is not available.

Get tested for a suspected infectious disease

To receive a vaccine while ill from a virus is not advisable because there may be chances of spreading your illness to health care workers who are administering the vaccine.

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Which of the following is an example of an insoluble substance being added to water?

When added to water, the substance quickly falls to the bottom and then dissolves.
The substance has disappeared after being poured into the water.
The substance makes the water cloudy and then forms a layer on top of the water.
The water remains clear after the substance is stirred into the water with a spoon.

Answers

Answer:

Explanation: “Insoluble” generally means that a substance does not dissolve in water. Some examples include: sand, fats, wood, metals, and plastic. When we put them in water and try to mix them, they will not dissolve.

Explanation:

A metal (FW 311.8 g/mol) crystallizes into a face-centered cubic unit cell and has a radius of 2.86 Angstrom. What is the density of this metal in g/cm3

Answers

For a metal crystallizes into a face-centered cubic unit cell and has a radius of 2.86 Angstrom, the density  is mathematically given as

d=3.31g/cm

What is the density of this metal in g/cm3

Generally, the equation for the density  is mathematically given as

[tex]d=\frac{2*m}{NA*a^3}\\\\Therefore\\\\d=\frac{2*295.6mol}{6.022*10^23*(6.67*10^{-3})}[/tex]

d=3.31g/cm

In conclusion, the density of this metal

d=3.31g/cm

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3. Classify each reaction as exothermic or endothermic. (4 marks)
a. Energy + SO2(g)  S(g) + O2(g) _________________________________
b. Draw a potential energy diagram for the reaction above:

Answers

Energy + SO2(g) -----> S(g) + O2(g) is an edothermic reaction owing to te fact that energy is a reactant in the equation.

What is an endothermic reaction?

An endothermic reaction is one in  wioch energy is supplied to the system in order to enable the breakdown of bonds. Hence, the reaction vessel feels cool as energy is withdrawn from the surroundings.

The reaction;  Energy + SO2(g) -----> S(g) + O2(g) is an edothermic reaction since energy is a reactant in the equation.

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In order to make a covalent bond, the orbitals on each atom in the bond must overlap.

Answers

Answer:

true

Explanation:

Covalent bonds are formed through the overlap of half-filled valence orbitals. Because of the overlapping, it is most probable that electrons are located within the region of the bond.

In order to make a covalent bond, the orbitals on each atom in the bond must overlap. Therefore, the given statement is true.

What is covalent bond?

A covalent bond is an electron exchange usually results in the production of electron pairs between atoms. These electron couples are referred to as bonding pairs as well as sharing pairs. Covalent bonding seems to be the permanent equilibrium of atoms' forces of attraction versus attraction when atoms share electrons.

Because to electron sharing, each atom in a number of molecules can achieve the corresponding amount of the valence shell, resulting inside a stable electronic configuration. In organic chemistry, covalent bonds are far more common than ionic ones. In order to make a covalent bond, the orbitals on each atom in the bond must overlap.

Therefore, the given statement is true.

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The mass and distance between two objects affects the strength of gravitational force.
What factors do you think might affect the strength of the electric force?

Answers

Conductivity and Distance

Spring tides happen 2 times each month at the _and_phases

Neap tides happen 2 times each month at the _and_phases​

Answers

Answer:

Spring tides happen 2 times each month at the New and Full phases

Neap tides happen 2 times each month at the First Quarter and Third Quarter phases

Question 76 (1 point)
The volume of a gas is 4.00 liters at 293 K and constant
pressure. For the volume of the gas to become 3.00 liters,
the Kelvin temperature must be equal to

3.00 x 293
4.00
4.00 x 293
3.00
3.00 x 4.00
293
293
3.00 x 4.00
Ос
Od

Answers

Answer:

Yeah yeah i don't know what you want anybody to do with this question because you don't have all of your answers.

A scientist is studying fish. She wants to sort many different kinds of fish into groups by the way they swim. Which characteristic would the scientist most likely use when grouping the fish? A. number of teeth B. fin position C. number of stripes D. body color

Answers

Answer:

B.fin position

C.colour of stripes

When referring to immunity, what does the term innate imply?


the mechanism will provide defense against many different types of pathogens

the mechanism will develop based upon exposure to specific pathogens

the mechanism will be built-in and present at birth

the mechanism will be acquired over an individual's lifetime

Answers

Answer:

Innate, or nonspecific, immunity is the defense system with which you were born. It protects you against all antigens. Innate immunity involves barriers that keep harmful materials from entering your body.

9. In a neutralization reaction, an acid and a base react to produce a an oxide and water.


true/false

Answers

Answer and Explanation: The answer is false.

all in a day's work cryptogram

Answers

Answer:

yup!

Explanation:

i dont know what else to say.

Propane gas, C3H8, burns in excess oxygen gas. When the equation for this reaction is correctly balanced and all coefficients are reduced to their lowest whole-number terms, the coefficient for O2 is
(A) 4 (B) 5 (C) 7 (D) 10 (E) 22

Answers

Answer:

5

Explanation:

First find the balanced equation for this rxn

C3H8    +  5O2    ====>     3 CO2    + 4  H2O

To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. The correct option is option A.

What is Balanced equation?

Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.

Propane gas, C[tex]_3[/tex]H[tex]_8[/tex], burns in excess oxygen gas. When the equation for this reaction is correctly balanced and all coefficients are reduced to their lowest whole-number terms, the coefficient for O[tex]_2[/tex] is 5.

C[tex]_3[/tex]H[tex]_8[/tex]    +  5O[tex]_2[/tex]  [tex]\rightarrow[/tex]   3 CO[tex]_2[/tex]    + 4  H[tex]_2[/tex]O

Therefore, the correct option is option B.

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The Scotch broom is an invasive species in California, Oregon and Washington. These shrubs grow quickly after areas that have been cleared of
trees and inhibit reforestation by out-competing native seedling trees. These plants developed a mutation that causes their seed to burst from
their shell when touched by passing animals. As animals brush past these plants, the black dried pods of the Scotch broom explode with a sharp
pop, scattering seeds away from the parent plant.
Which statement below best explains why the Scotch broom is able to out-compete the native plants in that area?
A. Relying on animals to disperse the seeds always results in better reproductive success than other methods of seed dispersion.
B. Specialized seed pods allow seeds to be dispersed farther and into less crowded areas promoting reproductive success.
C. The crackling sound of seed pods exploding promotes reproductive success by attracting the animals that are responsible for scattering
seeds.
D. Genetic mutations have caused the plant to be more resistant to cold temperatures allowing them to survive and reproduce all year
long.

Answers

Based on the illustration, the statement that best explains why the Scotch broom is able to outcompete the native plants in the area would be the specialized seed pods that allow seeds to be dispersed farther and into the less crowded areas.

Reproductive success

Different organisms have different ways of behaving to ensure the survival of their propagules or offsprings.

In the case of the Scotch broom, the ability of the pods holding the seeds to burst open and catapult the seeds far away from the parent plant is a reproductive strategy to ensure that their seeds are well dispersed.

By doing so, the propagules of the plant will reach new areas where they do not exist before and as such, able to spread quite quicker than the native plants.

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