the compound k3au(cn)6 is a potassium salt of a gold cyanide complex-ion that is key to the most commonly used leaching process during gold mining. what is the charge on the complex-ion?

Answer:

Both Earth and Space

Explanation:

Because in 1948 there was no ability to analyze from space but in 1966 there was.

One mole of carbon gives one mole or 44 g of carbon dioxide gas. Then 5.4 moles can give 5.4 moles or 237.6 g of the carbon dioxide gas.

A synthesis reaction is a type of reaction in which two reactants combines to form a new single product.  Synthesis reaction can be of endothermic or exothermic.

Here, the synthesis reaction of carbon and oxygen giving carbon dioxide is given. As per the balanced chemical equation of the reaction, one mole of C gives one mole of carbon dioxide.

molar mass of carbon dioxide = 44 g/mol

Then, 5.4 moles of carbon can give equal number of moles that is, 5.4 moles of CO₂.

mass of 5 moles of CO₂ = 5.4 × 44 g/mol = 237.6 g.

Therefore, 237.6 g of CO₂ is produced by 5.4 moles of C in this synthesis reaction.

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Answer:

representative elements

Answer: transition element

Explanation:

Answer:

hope this helps

Explanation:

it has to do with crystallization in the wax. When solid, the long alkyl chains align and crystallize, and these crystallites scatter light which leads to higher opacity. When heated, the crystallites melt, and the resulting amorphous liquid no longer scatters light.

If a mixture of quartz and bauxite contains 78% of quartz this means

There are 78gm of quartz in 100 gm of mixture/

There are 78gm of quartz for every 22 gm of bauxite.

There are 117gm of quartz for every 150gm of mixture.

If there is 78% of quartz in mixture of quartz and bauxite then

78% of quartz in 100% of mixture

If we suppose we have 100gm of mixture

Then ,

78% of 100 gm = 78gm

i.e. we have 78gm of quartz in mixture

100gm = quartz+ bauxite

100gm +78gm + bauxite

100- 78 = bauxite

Therefore bauxite = 22gm

Thus in 100 gm of mixture there is 78 gm of quartz and 22gm of bauxite.

If we suppose we have 150gm of mixture

Then ,

78% of 150 gm = 117gm

i.e. we have 117gm of quartz in mixture

150gm = quartz+ bauxite

150gm = 117gm + bauxite

150- 117 = bauxite

Therefore bauxite = 33gm

Thus in 150 gm of mixture there is 117gm of quartz and 33gm of bauxite.

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Answer:

Im not sure what you mean but I hope what I wrote helps you!

The Law of Conservation of Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another.

Explanation:

Answer:

number of moles of CO2 is 0.054

number of moles of CO is 0.107

number of moles of O2 remaining is 0.01 mole

mole fraction of CO is 0.63

Explanation:

Firstly, we write the equation of reaction;

3C(s) +2O2(g) → CO2(g) +2CO(g)

Now, we proceed.

From the written equation, we can deduce that

3 mol C = 2 mol O2 = 1 mol CO2 = 2 mol CO

No of mol of C reacted = 0.161 mol

limiting reactant according to the question is Carbon

a. no of mol of CO2 formed = 0.161*1/3 = 0.054 moles ( no of moles of CO2 formed is one-third of no of moles of carbon reacted. This is obtainable from their mole ratio 1:3)

b. no of mol of CO formed = 0.161*2/3 = 0.107 mol

c. no of mol of O2 remaining = 0.117 - (0.151*2/3) = 0.117-0.107 = 0.01 mole

d. mole fraction of CO = no of mol of CO/Total number of moles

= 0.107/(0.107+0.054+0.01)

= 0.625730994152 which is approximately 0.63

The number of moles of CO₂, CO, and O₂ formed is 0.054, 0.107, and 0.01 mole respectively.

And the mole fraction of CO is 0.63

The equation of reaction is given as the following:

3C(s) +2O₂(g) → CO₂(g) +2CO(g)

from above we can say that the number of moles required for the reaction to proceed is:

3 mol of C

2 mol of O₂

1 mol CO₂, and

2 mol CO

so the ratio is:

C:O₂:CO₂:CO = 3:2:1:2

Given that the number of mol of C produced is 0.161 mol

(i) number of mol of CO₂ formed = 0.161 × 1/3 = 0.054 moles

(ii) number of mol of CO formed = 0.161 × 2/3 = 0.107 mol

(iii) number of mol of O₂ remaining = 0.117 - (0.151 × 2/3)

                                                          = 0.117 - 0.107

                                                          = 0.01 mole

(iv) mole fraction of CO = (number of mol of CO) / (Total number of moles)

                                       = 0.107 / (0.107+0.054+0.01)

                                       = 0.63

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Answer:

1

Explanation:

Because The Kinetic Energy Is Very similar to Potential Energy

Answer:

all of these are properties of metalloids

Answer:

The answer is B. All of these

Explanation:

Can you mark me the brainliest?

(a) The halogen group includes the elements X, Y, and Z. Z is a solid, X and Y are gases. (c) Because Z contains the most electrons in its outermost shell, it has the highest boiling point. It has the highest intermolecular interactions, which makes it more difficult to separate and necessitates a greater temperature to attain its boiling point. (

d) Fe + Z FeZ is the equation for the reaction between element Z and iron metal. (e) If the fluid is acidic, the litmus paper will become red.

This is so because element Y is a halogen, which when dissolved in water may produce hydrohalic acids. These acids are potent enough to transform blue litmus paper to red.

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Answer:

b

Explanation:

The Theoretical temperature ie, Absolute Zero is when "All particles in a sample can never all be moving at once." Hence, Option (A) is correct

What is Absolute Zero temperature ?

It is determined by  ideal gas law;  absolute zero is taken as −273.15 degrees on the Celsius scale (International System of Units), which equals −459.67 degrees on the Fahrenheit scale.

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.

The fundamental particles of nature have minimum vibrational motion, retaining only quantum mechanical, zero-point energy-induced particle motion.

According to the laws of thermodynamics,

Absolute zero cannot be reached using only thermodynamic means, because the temperature of the substance being cooled approaches the temperature of the cooling agent asymptotically and a system at absolute zero still possesses quantum mechanical zero-point energy, the energy of its ground state at absolute zero.

The kinetic energy of the ground state cannot be removed.

Therefore,

The theoretical temperature ie, Absolute Zero is when "All particles in a sample can never all be moving at once." Hence, Option (A) is correct

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Answer:

South Africa has problems of xenophobia because there are mor bacteria than a normal country

Explanation:

Hope this helps

Answer:

Column A            \({}\)                                              Column B

1. CaS                   \({}\)                                              Calcium Sulfide

2. CaSO₄            \({}\)                                                Calcium sulfate

3. CaSO₃            \({}\)                                                 Calcium sulfite

Explanation:

1) Calcium sulfide is a compound formed between calcium, Ca, and sulfur, S, with a chemical formula of CaS. It forms cubic crystals similar to rock salt, and smells like rotten eggs

2) Calcium sulfate is a chemical compound consisting of calcium, Ca, and sulfate SO₄. It is found in nature in the hydrated form as the mineral gypsum

3)Calcium sulfite is a chemical compound formed between calcium, Ca and sulfite, SO₃ used to treat water and preserve food.

Answer:

the formula for calcium sulfite is CaSO3

the formula for calcium sulfate is CaSO4

the formula for calcium sulfide is CaS

Explanation:

Answer:

CaC2 + 2H2O → C2H2 + Ca(OH)2

thats it

Explanation:

Answer:It’s helps use take in fresh air and conduct it to carbon

dioxide.

Explanation:Our respiratory system not only helps us turn air to Co2 the frest air also helps refresh our blood when it passes through our heart.

The primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body. The respiratory system does this through breathing. When we breathe, we inhale oxygen and exhale carbon dioxide. This exchange of gases is the respiratory system's means of getting oxygen to the blood. The respiratory system also helps to regulate the acid-base level in the blood. lastly, the respiratory system allows us to vocalize by the movement of exhaled air through the larynx.

brings oxygen into the body

0.00255mol of NaOH is present.

Titration is a laboratory technique used to determine the concentration of a known reactant in a solution. It involves adding known amounts of a titrant (a solution of known concentration) to a sample of the unknown solution until the reaction between the two is complete. The concentration of the unknown solution can then be determined by measuring the amount of titrant used.Sodium hydroxide (NaOH) is a white crystalline solid that is highly soluble in water, producing an alkaline solution.

amount of substance,n(mol)=\(concentration,c(mol dm^{-3})*\frac{volume,v(cm^3)}{1000}\)

volume of NaOH {\(cm^3\)}=25.0

comcentration of NaOH (\(mol dm^{-3}\))=0.10

amount of NaOH (mol)=\(0.10*\frac{25.0}{1000}\)

amount of NaOH(mol)=0.0025 mol

Therefore,the amount of NaOH is 0.00255mol

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Answer:

Explanation:

The percent composition of a compound is the percent of total mass made up by a ... data for a reaction of iron and oxygen which produces an iron oxide compound. ... 80.0 g sample of a compound that was 20.0 g element X and 60.0 g element y then the ... How can I calculate the percent composition of water in a hydrate?

2H₂ + O₂ ⇒ 2H₂O

Conservation of mass states that

In a closed system, the masses before and after the reaction are the same

So it can be concluded

So let's see which of the several options , which one has the same number of atoms on both sides of the equation

2H₂ + O₂ ⇒ 2H₂O

H ⇒ left 4, right 4

O ⇒ left 2, right 2

so the equation is in balance and represents the Law of Conservation of

Mass

Answer:

D

Explanation:

Answer:

X

Explanation:

because it is the greatest

i)   Either Q or R could potentially form an ionic bond with S because the element S has the highest electronegativity (6), while the other two elements have lower electronegativity values.

ii)

S and Q are more likely to form a polar covalent bond because the electronegativity difference between S and Q (6 - 3.64 = 2.36) is greater than the electronegativity difference between S and R (6 - 3 = 3).

iii)

The electronegativity difference between Q and R (3.64 - 3 = 0.64) is relatively small, indicating that they are more likely to form a non-polar covalent bond.

In a polar covalent bond, the electrons are shared unequally between the two atoms, thus creating a partial positive charge on one atom and a partial negative charge on the other.

The greater the difference in electronegativity between the two atoms, the more polar the bond will be.

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Answer:

cellular respiration

Explanation:

Living animals release carbon back into the carbon cycle through the process of respiration. During respiration, animals take in oxygen and release carbon dioxide as a waste product. This carbon dioxide can be taken up by plants during photosynthesis and used to build organic compounds, which can then be consumed by other animals, continuing the carbon cycle. Additionally, when animals defecate or when their bodies naturally decompose after death, the organic matter can be broken down by decomposers, such as bacteria and fungi, which release carbon back into the cycle as well.

I just finished my biology class in high school with an A. Trust me lol

Hope you have a nice day

Answer:

One process that returns carbon from living animals to the cycle is cellular respiration. Cellular respiration converts the organic carbon in the food molecules into carbon dioxide gas, which is released into the atmosphere or water. Another process that returns carbon from living animals to the cycle is excretion1. Excretion removes waste products that contain carbon, such as urea and uric acid, from the body of animals. These waste products can be decomposed by bacteria and fungi, releasing carbon dioxide back into the environment.

Explanation:

Answer:

A mole is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance

For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu). By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atomatom

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D)

1 atomic mass unit =

1.66053904 × 10-27 kilograms

for example:

Atomic mass of one molecule of H2SO4 is 98 Atomic mass unit.

Atomic mass of one mole of H2SO4 is 98 grams.

So 98 grams of H2SO4 contains 1 mole of H2SO4 molecule i.e., 7 moles atoms.

So, by applying the basic maths, we get

49 grams of H2SO4 contains 1/2 mole of H2SO4 molecule i.e., 3.5 moles atoms.

Answer:

A mole is the amount of a substance which contains 6.20×10 power 3

The electrolysis of molten calcium bromide (CaBr₂).

In a nonspontaneous redox reaction, an electrolytic cell is used to force the reaction to occur. During the electrolysis of molten calcium bromide, the cation (Ca2+) will be reduced, and the anion (Br-) will be oxidized. Since there is only one cation and one anion present in this case, there's no need to consider reduction or oxidation potentials.

Part A: The substance produced at the cathode during the electrolysis of molten calcium bromide (CaBr₂) under standard conditions is metallic calcium (Ca). This occurs because the Ca2+ ions are reduced to Ca at the cathode. The reduction half-reaction is as follows:

Ca2+ + 2e- → Ca

The chemical formula of the substance produced at the cathode is Ca.

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Step 1: The mass of ice remaining after thermal equilibrium is reached cannot be determined without additional information.

Step 2: How can we determine the mass of ice left after thermal equilibrium?

Step 3: The mass of ice that remains after the system reaches thermal equilibrium cannot be determined solely based on the information given. In order to calculate the mass of ice, we would need to know the initial masses and temperatures of the water in the different phases, as well as any heat transfer that occurred during the process. Without this information, it is impossible to determine the specific amount of ice that remains. Learn more about the calculation of mass in thermal equilibrium and the importance of initial conditions in determining the final state of a system. #SPJ11

The mass of ice that remains after the system has come to thermal equilibrium can be calculated using the principle of energy conservation and the specific heat capacities of water in different phases.

Explanation:

When the system reaches thermal equilibrium, heat is transferred between the water in different phases until the temperatures equalize. This means that the heat gained by the ice (H2O(s)) is equal to the heat lost by the liquid water (H2O(l)).

To calculate the mass of ice that remains, we can use the equation:

m_ice * c_ice * (T_eq - T_ice) = m_water * c_water * (T_water - T_eq)

- m_ice is the mass of ice

- c_ice is the specific heat capacity of ice

- T_eq is the equilibrium temperature

- T_ice is the initial temperature of the ice

- m_water is the mass of liquid water

- c_water is the specific heat capacity of water

- T_water is the initial temperature of the liquid water

By rearranging the equation and solving for m_ice, we can determine the mass of ice that remains.

It's important to note that the specific heat capacity of ice and water vary slightly with temperature, so for a more accurate calculation, specific values for c_ice and c_water at the given temperatures should be used.

energy conservation and specific heat capacities of different substances to understand the principles behind this calculation.

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Answer:

exchange of heat

Explanation:

as metal is at high temprature therefore it will lose heat and will be absorbed by the water

37.5 moles of iron will produce 2990.31 grams of Fe₂O₃.

To determine the number of grams of Fe₂O₃ produced from 37.5 moles of iron (Fe), we need to use the balanced chemical equation for the reaction in which iron reacts to form Fe₂O₃.

The balanced equation for the reaction is:

4Fe + 3O₂ -> 2Fe₂O₃

From the balanced equation, we can see that 4 moles of iron react to produce 2 moles of Fe₂O₃. This means that the molar ratio between Fe and Fe₂O₃ is 4:2 or 2:1.

Now, we can set up a simple proportion to calculate the number of moles of Fe₂O₃ produced:

(37.5 moles Fe) * (2 moles Fe₂O₃ / 4 moles Fe) = 18.75 moles Fe2O3

So, 37.5 moles of iron will produce 18.75 moles of Fe₂O₃.

To convert moles to grams, we need to use the molar mass of Fe₂O₃. The molar mass of Fe₂O₃ can be calculated by adding the atomic masses of iron (Fe) and oxygen (O) in the compound:

(2 x atomic mass of Fe) + (3 x atomic mass of O) = (2 x 55.845 g/mol) + (3 x 16.00 g/mol) = 159.69 g/mol

Now, we can calculate the mass of Fe₂O₃ produced:

Mass = moles x molar mass

Mass = 18.75 moles x 159.69 g/mol = 2990.31 grams

Therefore, 37.5 moles of iron will produce 2990.31 grams of Fe₂O₃.

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