Place whole number coefficients in the blanks to balance the
chemical reaction.
CuSO4
Zn -->
ZnSO4+
Cu

According to the information in the graph, it can be inferred that the amount of solute that will precipitate out of solution at 20°C is 130 grams.

To calculate the amount of solute that precipitates out of solution we must identify the solute data at 80°C and 20°C and identify the difference as shown below:

According to the above, the amount of solute that will precipitate out of solution due to the change in temperature is 130 grams of KNO3.

Note: This question is incomplete because the graph is missing. Here is the graph

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Answer:

The correct option is;

Group 12

Explanation:

A metallic element that is shiny and silver colored that can exist in the +1 and +2 ionic states and  which forms a bright red compound with sulfur is mercury, Hg

The compound formed between mercury and silver is one of the earliest synthetic compound also known as vermilion and cinnabar. The bright red pigment of the HgS is used widely and is one of the most favorite pigment found in medieval European outstanding works of arts and in Chinese decorated wares made of lacquer as well as in mesoAmerica.

Answer:

12

Explanation:

Answer: they like deep water

Explanation: they do

17.6 mL of 0.500 M NaI would be required to make a 0.0320 M solution of NaI when diluted to 275.0 mL with water.

Using the dilution formula:

C₁V₁ = C₂V₂

where C₁ is the initial concentration (0.500 M)

V₁ is the initial volume

C₂ is the final concentration (0.0320 M)

V₂ is the final volume (275.0 mL).

Solving for V₁:
V₁ = (C₂V₂) / C₁

Putting the values:
V₁ = (0.0320 M × 275.0 mL) / 0.500 M
V₁ = 17.6 mL

So, you would need 17.6 mL of 0.500 M NaI to make a 0.0320 M solution of NaI.

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Answer:

A and C

Explanation:

Just did the test

The butterflies all live in the same place and the butterflies are all the same species. Hence, options A and C are correct.

A species is often defined as a group of organisms that can reproduce naturally with one another and create fertile offspring.

The butterflies come down at night and gather in clusters. A cluster of butterflies is called a roost or a bivouac. Monarchs migrate alone. They do not travel in flocks the way many birds do.

Hence, options A and C are correct.

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Answer:

C

Explanation:

Using a flask that is too large for the amount of solution may result in inefficient distillation due to decreased surface area and increased evaporation time. An appropriately sized flask for distilling approximately 100ml of solution would be around 125-250ml.

When a flask that is significantly larger than the amount of solution is used for distillation, there are a few potential problems. Firstly, the surface area available for evaporation is reduced, as the solution spreads out thinly over the larger flask. This can lead to slower evaporation and longer distillation times. Additionally, the large headspace in the flask can result in increased loss of volatile compounds through vapor escape, which may affect the efficiency and yield of the distillation process.

To address these issues, an appropriately sized flask would be one that allows for efficient evaporation and maintains a suitable surface area for distillation. In this case, a flask in the range of 125-250ml would be more suitable for distilling approximately 100ml of solution. This size ensures a better ratio between the solution volume and flask capacity, facilitating effective heat transfer, and reducing the loss of volatile components during the distillation process.

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Answer:

The answer is option 1.

Explanation:

Lithium is a Group 1 element. So the correct charge for lithium should be Li+.

Answer:

(a)\(Li^{2+}\)

Explanation:

Answer is (a)\(Li^{2+}\)

As lithium has only one valence electron, it will lose one electron to form a cation with charge 1+ . Thus the correct Li ion is \(Li^{1+}\)

Answer:

X : 68 F

Y : 72 F

Explanation:

pls mark brainliest

Answer: do you syill need help on it i am happy to help

Explanation: TELL ME

Answer: D. Complete Combustion & Balanced

Explanation:

D. Complete Combustion & Balanced

Complete combustion is a type of combustion reaction that occurs when a fuel reacts with oxygen to produce carbon dioxide and water as products. In a complete combustion reaction, the fuel is burned completely and all of the reactants in the reaction are used up.

A balanced reaction means that the number of atoms of each element on the reactant side of the equation is equal to the number of atoms of each element on the product side of the equation. The reaction shown above is balanced, meaning that there are 4 atoms of carbon and 8 atoms of oxygen on the reactant side, and 1 atom of carbon and 2 atoms of oxygen on the product side.

Answer:

D. complete combustion & balanced

Answer:

Isotope 2

Explanation:

Isotope 2 is the most abundant. Its percent abundance is 78.68% which is the largest percentage, and therefore the most common of the isotopes presented.

Good luck!

The rank from highest to lowest boiling point is given below

Greatest -> Least

1) paraffin, C25H52

2) hexadecane, C16H34

3) octane, C8H18

4) 2,2,4-trimethylpentane, C8H18

5) propane, C2H8

The boiling points point is the temperature at which the vapor pressure is equivalent to the average atmospheric pressure at sea level. A liquid's boiling point changes depending on the pressure that is applied (760 mm [29.92 inches] of mercury). Water boils at 100° C (212° F) at sea level.

Therefore, based on the above, from highest to lowest point, the hydrocarbons are: paraffin, nonadecane, pentane, 2, 2-dimethylpropane, and propane.

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See full question below

Place these hydrocarbons in order of decreasing boiling point. Rank from highest to lowest boiling point. To rank items as equivalent, overlap them.

hexadecane, C16H34

paraffin, C25H52

octane, C8H18

2,2,4-trimethylpentane, C8H18

propane, C2H8

Answer:

The minimum number of grams of CO require

produce 88 grams of CO2 is 64 g.

The elements in period 2 of the periodic table include lithium (Li), beryllium (Be), boron (B), carbon (C), nitrogen (N), oxygen (O), fluorine (F), and neon (Ne).

These elements show variations in their reactivity due to changes in their atomic structure and electronic configurations as you move across the period.

Reactivity is a measure of how easily an element forms compounds or undergoes chemical reactions. In general, as you move from left to right across period 2, the reactivity of the elements increases.

The reactivity of the elements in period 2 can be explained by trends in atomic structure and periodic trends. As you move across the period, the effective nuclear charge increases due to the increasing number of protons in the nucleus, leading to a stronger attraction for electrons.

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Look at the elements from period 2 on the Periodic Table. Explain the differences in their reactivity and how it relates to the Periodic Table.

The volume that is occupied by the gas is obtained as  56 L.

We know that from the Avogadro's law, the volume that can be occupied by one mole of a gas is obtained as 22.4 L. This implies that we have to find the number of moles in the 70 g of the CO and then obtain the corresponding volume by simple proportion.

Number of moles of CO = 70.0 g/28 g/mol

= 2.5 moles

If 1 mole of the gas occupies 22.4 L

2.5 moles of the gas occupies 2.5 * 22.4/1 mole

= 56 L

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Answer:

A- Upwelling

Explanation:

Answer:

solid liquid and gas

Explanation:

Answer: Forms: Liquid water, solid water (ice) and gaseous water (water vapor)

Explanation:

Obviously liquid water comes from the sink, ice can be found in the freezer, and water vapor comes from boiling water, it is always in the air around us.

Liquid water is used for hydration or for food preparation. Ice is used to cool things down or in drinks, and water vapor isn't really used by humans. Rather, it serves as a natural greenhouse gas.

Answer:

c. Electrons are shared, but they aren't shared evenly

Explanation:

Pure (non polar) bonds have a low electronegativity difference of 0.0 - 0.4 which allows electrons to be shared.

Polar bonds have a high electronegativity difference of 2.0 4.0 so rather than sharing the electrons, the electrons will be transferred to one atom only and will stay there.

Covalent bonds have a electronegativity difference between these two types of bonds (0.4 - 2.0) so electrons are shared but not equally, meaning they are shared between the two atoms but stay at one atom for a longer period of time than the other.

Answer:

96.3g is the actual yield from this reaction

Explanation:

Have been 113g...

The percent yield of a reaction is defined as one hundred times the ratio between actual yield (Our incognite) and the theoretical yielf (113g). The equation is:

Percent yield = 85.22% = Actual Yield / 113g * 100

0.8522 = Actual Yield / 113g

0.8522*113g =

96.3g is the actual yield from this reaction

Answer:

96.3

Explanation:

Just took the test

The correct answer to the question is option B: the iron atoms are losing kinetic energy and potential energy when melted iron solidifies without any change in temperature.

When melted iron solidifies without any change in temperature, the iron atoms are losing kinetic energy, and they are losing potential energy as well.

During the process of melting, the iron atoms absorb energy, which makes them move more rapidly, and this increased kinetic energy enables them to overcome the intermolecular forces that hold them together in the solid state. As the temperature decreases, the kinetic energy of the iron atoms decreases, and eventually, they are no longer able to overcome these intermolecular forces. As a result, they begin to settle into a regular crystal lattice, and the iron solidifies.

At the same time, as the iron atoms settle into the crystal lattice, they release potential energy, which is stored in the bonds between the atoms. As the atoms become more tightly packed in the solid state, this potential energy is converted into kinetic energy, which causes the iron atoms to vibrate more slowly.

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1. d.4.125 x 10²⁴ atoms

2. c. 487.73 g

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

1. 7 moles of phosphorus, so n=7, then number of atoms :

\(\tt N=7\times 6.02\times 10^{23}\\\\N=4.215\times 10^{24}\)

2. 2.5 moles of Pt, so n=2.5, the mass of Pt(MW=195,084 g/mol) :

\(\tt mass=mol\times MW\\\\mass=2.5\times 195,084\\\\mass=487.73~g\)

Answer:

protons- 10

electrons- 10

neutrons- 10

Explanation:

no of protons/ electrons = atomic number

no of neutrons = atomic mass - atomic number

For this question, since we are given the pressure, number of moles and temperature to find the volume, we have to use the ideal gas equation.

pV = nRT

Now lets put in the values

V = (0.263 mol x 8.314 J/mol x 307 k)/1.15 atm

V = 583.722 L

.

Answer:The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotope).

Explanation:try to find what i ment and  think you will get the answer

Answer:

I think the answer is b or d

Explanation:

I THINK IS THE KEY WORD HERE

Answer: Neutrons  vary from each other in their element

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Talc is one of the softest minerals. That's the what it is best known for.

Talc is a soft mineral that is composed of magnesium, silicon, and oxygen. It is a type of clay mineral that is known for its softness, smoothness, and ability to absorb moisture. Talc has a chemical formula of Mg3Si4O10(OH)2 and is often found in metamorphic rocks, particularly in regions where there is a lot of magnesium and silica.

Talc is commonly used in various industries, such as in the production of ceramics, paint, paper, and plastics. It is also used as a filler in products such as cosmetics, talcum powder, and pharmaceuticals.

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The the diameter of a marble is measured with the use of the instrument which is referred to as a micrometer.

This refers to a type of metamorphic rock which contain compounds such as calcite and exists in different shapes and colors.

The shape of a marble is a sphere and the formula for calculating its volume will be used.

When the diameter is measured with the micrometer we then divide it by two in other to get the radius.

The volume is then calculated using the formula below:

Volume of marble(sphere) =  V = 4/3 πr³.

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