How many moles of calcium carbonate-CaCO3 = 4.15 g​

Answer:

Explanation:

Means in between two bonded atoms one is more electronegative than other the one which is more electronegative has partial negative charge and the other which has less electronegativity has partial positive charge

Final answer:

A polar bond refers to the unequal distribution of electron density between two atoms due to a difference in electronegativity.

Explanation:

The polarity of a bond refers to the unequal distribution of electron density between two atoms.

A bond is considered polar when there is a significant difference in electronegativity between the bonded atoms, resulting in one atom being more electron-attracting than the other.

For example, in a bond between hydrogen (H) and oxygen (O) in a water molecule (H2O), the oxygen atom is more electronegative than the hydrogen atoms, causing the oxygen atom to attract electrons and develop a partial negative charge (δ-) while the hydrogen atoms have a partial positive charge (δ+).

Answer:

Explanation:

Wavelength and frequency are related by the velocity equation of waves.

  Velocity  = f x ∧

where f is the frequency

           ∧ is the wavelength

Frequency of a wave is the amount of that wave that passes through a point at a particular time.

Wavelength of a wave is the distance between two successive crests and trough.

Velocity of a wave is the speed of a wave

Genetic engineering is the process of using recombinant DNA (rDNA) technology to alter the genetic makeup of an organism. Genetic engineering involves the direct manipulation of one or more genes. Most often, a gene from another species is added to an organism's genome to give it a desired phenotype. It involves 3 steps:

(1) The isolation of DNA fragments from a donor organism;

(2) The insertion of an isolated donor DNA fragment into a vector genome

(3) The growth of a recombinant vector in an appropriate host.

An example of genetic engineering is production of insulin. In plants, genetic engineering has been applied to improve the resilience, nutritional value and growth rate of crops, for example, potatoes, tomatoes and rice.

In animals it has been utilized to develop sheep that produce a therapeutic protein in their milk that can be used to treat cystic fibrosis, or worms that glow in the dark to permit scientists to become more familiar with diseases such as Alzheimer’s.

Answer:

Sulfur is a soft, pale yellow, odorless, brittle solid. It is insoluble I. carbon disulfide. It burns with a blue flame, oxidizing to sulfur dioxide. Sulfur exists in several crystalline and amorphous allotropes.

Sulfur has the ability to form thiols which are known for their potent odors, a characteristic shared with oxygen as they are in the same group on the periodic table. Hydrogen sulfide is an example of a toxic sulfur compound with a strong smell.

One characteristic of sulfur is its ability to form thiols, which are the sulfur analogs of alcohols. Thiols, such as methanethiol (CH3-SH) and the garlic odorant prop-2-ene-1-thiol (CH2=CH-CH2-SH), are known for their strong and often unpleasant odors. For example, methanethiol is present in oysters, cheddar cheese, onions, and garlic, contributing to their unique smells. Sulfur is part of the same group (6A) as oxygen on the periodic table, and mirrors some of oxygen's properties, including the ability to replace oxygen in organic compounds, such as alcohols, forming thiols. Hydrogen sulfide (H2S), another sulfur compound, is noteworthy for its colorless appearance yet potent smell of rotten eggs and its high toxicity, which is comparable to that of hydrogen cyanide.

Answer:vapor

Explanation: Because it is

Answer:

nonrigid shape or volume; highly active and mobile

Explanation:

Answer:

B) any complex thing with properties normally associated with living things

Answer:

Organism is a creature such as plant ,animals and living things or a single-celled life form

Explanation:

The living creature is compared with the interdependent part of the organism. Some of the Example for the organism is dog, bacteria or unicellular animal-like amoeba. This organism can be classified by naming and grouping. The biology name of an organism is called Taxonomy. Classification of an organism help in exploring the unknown potential of many helpful organisms.Due to their classification we can restore the ecosystem, which is imbalanced today.

Answer: 9.82401 grams

For multiple covalent bonds to form in molecules, the molecules must contain carbon nitrogen or​ oxygen.

Explanation:

Answer:

      [tex]\dfrac{2.31}{0.790}=2.92[/tex]

Explanation:

When you divide two measures, the rule for the number of significant figures of the quotient is to keep the number of significant figures of the measure with least significant figures.

Then, the asnwer must have three significant figures:

            [tex]\dfrac{2.31}{0.790}\approx 2.92405\approx2.92[/tex]

Since the figure after 2.92 is less than five, you just drop it.

Final answer:

To solve 2.31 ÷ 0.790, divide the numbers and round the result to three significant figures, the least number present in the given values, giving the final answer as 2.92.

Explanation:

To solve the division problem 2.31 ÷ 0.790 with the proper number of significant figures, we must consider the number of significant figures in each of the original numbers. The number 2.31 has three significant figures, and 0.790 has three significant figures as well. When dividing, the number of significant figures in the result should be the same as the number with the least significant figures in the problem.

To get the answer, we divide 2.31 by 0.790:

Therefore, the answer to the problem expressed to the correct number of significant figures and with proper units (if they were provided in the original problem), would be 2.92.

Answer:

No moles will be left over of either reactant because both are limiting.

Explanation:

4NH₃    +    5O₂    →    4NO   +    6H₂O

8 mol       10 mol

Answer:

       [tex]\large\boxed{\large\boxed{7.9\times 10^9g}}[/tex]

Explanation:

The information of the content of  the element strontium in seawater is incomplete. The complete information is:

1. First, convert the given volume of seawater given to kilograms

[tex]9.84\times 10^{8} m^3\times \dfrac{1,000dm^3}{m^3}\times \dfrac{1,000cm^3}{dm^3}\times 1.0\dfrac{g}{cm^3}\times\dfrac{1kg}{1,000g}=9.84\times 10^{11}kg[/tex]

2. Second, multiply the given concentration of the element strontium by the amount of seawater in kilograms

     [tex]8.0\times 10^-1cg/kg\times 9.84\times 10^{11}kg\times 1g/100cg=7.872\times 10^9g[/tex]

3. Finally, round to two significant figures:

     [tex]7.9\times 10^9g[/tex]

1. carbon dioxide is a gas at low temperatures at mars because in the oxidizing environment organic compounds are oxidized to form carbon dioxide.

2. The 1 electron in outermost shell of Na is shared with 7 electrons of outermost shell of chlorine giving neutral charge on compound.

3. Electrostatic force of attraction is between the metal and non-metal.

4. When metal and non metal exchange electrons to form a neutral or no charge compound it is said to have form ionic bonds.

Explanation:

1. Temperature at Mars is very low -80 Fahrenheit  (-60 degrees) because water is not present in the planet. Carbon dioxide is abundant in Mars. The atmosphere is oxidizing at Mars which oxidizes the organic compounds and forms carbon dioxide.

2. NaCl combines by sharing of electrons forming ionic bonding. Different atoms of the different element share electrons to form ionic bonds. Such bond is formed when electrons is transferred between the atoms. In the NaCl, Na has 1 electron (electropositive) in its outer shell and chlorine has 7 electrons (electronegative). Both share the electrons getting their octet complete and a neutral charge on the compound formed.

3. Electrostatic force of attraction is between the metal and non-metal when bond is formed. The ionic bonds is formed between metal and non metals when electron exchange takes place. The electrostatic force is the attraction between two opposite charges on the ion.

4. When a metal and non metal exchange electrons in which metal is electropositive and non metal is electronegative the bonds form is called ionic bond. The electron is transferred from metal to non metal and thus giving neutral charge on the compound i.e. the outer shell has its octet complete.

The balanced version of the chemical equation V2O5 (s) + HCl (aq) --> VOCl3 (s) + H2O (l) is: V2O5 (s) + 6 HCl (aq) --> 2 VOCl3 (s) + 3 H2O (l). This balance is achieved by ensuring an equal number of each type of atom on both sides of the equation.

To balance the given chemical equation, we need to ensure there are equal numbers of each type of atom on both sides of the equation. Let's start with vanadium (V) and chlorine (Cl) atoms, as they are only in one reactant and one product:

Now we have two vanadium atoms on both sides, but the number of chlorine atoms is not balanced yet. We'll increase the number of hydrochloric acid (HCl) molecules:

Last, let's balance the number of hydrogen (H) and oxygen (O) atoms. We'll also add some water molecules:

So the balanced equation is: V2O5 (s) + 6 HCl (aq) --> 2 VOCl3 (s) + 3 H2O (l).

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The question is about balancing a chemical equation. The balanced equation for V2O5 (s) + HCl (aq) ---> VOCl3 (s) + H2O (l) is V2O5 (s) + 6HCl (aq) ---> 2VOCl3 (s) + 3H2O (l)

The subject of this question relates to the balancing of a chemical equation. The chemical equation provided: V2O5 (s) + HCl (aq) ---> VOCl3 (s) + H2O (l) needs to be balanced, that is, the number of atoms of each element on the reactant (left) side of the equation have to equal the number of atoms of each element on the product (right) side of the equation. In this case, the balanced chemical equation would be V2O5 (s) + 6HCl (aq) ---> 2VOCl3 (s) + 3H2O (l)

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Answer:

Yes, they are isotopes.

Explanation:

Isotopes are atoms with the same atomic number Z and a different mass number (A). That is, they differ in the number of neutrons (eg carbon 12, has 6 protons, 6 electrons, and 6 neutrons, carbon 13, 7 neutrons, and carbon 14 8 neutrons).

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

[tex]2F_2+H_2O\rightarrow OF_2+2HF[/tex]

Thus in the reactants, there are 2 atoms of hydrogen , 1 atom of oxygen and 4 atoms of flourine.Thus there will be  atoms of hydrogen , 1 atom of oxygen and 4 atoms of flourine in the product as well.

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Answer:

The correct answer is B)About 5 percent

Explanation:

The approximate total size of the human nuclear genome is 3,200,000,000 base pairs. 1 to 1, 4% encode proteins, 24% are non-coding regions and the rest correspond to intergenic regions.

Of the total base sequence in human DNA, only about 5 percent code for proteins (Option B).

In conclusion, of the total base sequence in human DNA, only about 5 percent code for proteins (Option B).

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The relationship between carbon atoms and boiling point is:

When carbon atoms' number is more, the boiling point is also higher. For the alkaline that have the formula [tex]\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}+2}[/tex], as the carbon atoms' number increases, the melting or boiling point gets increased.

The reason for this is that long chain molecules have higher boiling points. This is because these long chains get wrapped around and it is very difficult to separate them whereas in shorter chains, they have weak forces and it is easy to separate them.

Molecules that have a strong bonding between them have a greater inter molecular force and so cannot move easily. Hence the kinetic energy is also slow between these molecules. Such molecules have higher boiling point.

The generally accepted parts of modern cell theory include: All known living things are made up of one or more cells. All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms.

Answer: what they said ^ is correct :>

Btw whoever reads this I hope u do good!

Explanation:

The most well-known threat is posed by human pressures brought on by the spread of agriculture, housing, and commercial space into cactus ecosystems .Cereus, Rebutia etc are a few of the more popular cacti groups.

A desert-dwelling plant with strong stems and sharp projections called spines. The term "cactus" is derived to the Greek word "kaktos," which was also the name of a kind of spiky plant that is frequently seen in Sicily: the cardoon. The word's earliest recorded use in English, describing the emerald-green, leafless plants found in the American desert, goes back to 1769. The most well-known threat is posed by human pressures brought on by the spread of agriculture, housing, and commercial space into cactus ecosystems .Cereus, Rebutia etc are a few of the more popular cacti groups.

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Answer:

The property of water which makes it to attach or stick to another surface is Adhesion.

Explanation:

Adhesion is the characteristic ability a substance possess to stick to other substances. This is as a result of the covalent bond existing between the two hydrogen atoms and the one oxygen atom in the water molecule.

An example of the property of Adhesion is a water drop that stuck to the end of the pine needles

Answer:

1 mole of NH3 has 6.023×10^23 molecules. 

To determine the number of saccharin molecules in a given sample, you can use the molar mass and Avogadro's number. The molar mass of saccharin is 183.18 g/mol and Avogadro's number is approximately 6.022 x 10^23 molecules/mol. By plugging in these values and doing the appropriate calculations, you can find the desired quantities.

To determine the number of molecules of saccharin that can be prepared, we need to first calculate the molar mass of saccharin. The formula for saccharin is C7H5NO3S, which gives a molar mass of (7*12.01) + (5*1.008) + (1*14.01) + (3*16.00) + 32.06 = 183.18 g/mol.

With this information, we can calculate the number of saccharin molecules in a 0.0400 g sample by using Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol. So, (0.0400 g / 183.18 g/mol) * (6.022 x 10^23 molecules/mol) = X molecules of saccharin.

To find the number of carbon atoms in the same sample, we can again use the molar mass and Avogadro's number. (0.0400 g / 183.18 g/mol) * (6.022 x 10^23 molecules/mol) * 7 carbon atoms/molecule = Y carbon atoms.

Answer:

(A)-Continuous

Continuous type of spectrum does show the illustration A. Therefore, option A is correct.

A continuous spectrum contains all light wavelengths within a specific range. Hot, dense light sources, such as stars, emit a nearly continuous spectrum of light that travels in all directions and interacts with other materials in space.

Continuous spectra also known as thermal or blackbody spectra are produced by dense gases or solid objects that emit heat. They emit radiation at a wide range of wavelengths, giving the spectra a smooth and continuous appearance.

The visible "electromagnetic spectrum" is a continuous spread of all spectral colors organized by wavelength.

Thus, option A is correct.

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Answer:

steam at 100°C

Explanation:

Grandpoint approved

The average kinetic energy of water molecules is greatest in steam at 100°C.

Water is a polar solvent that has potential energy on its own which can be converted to kinetic energy once the water is in motion.

The kinetic energy is that energy that a moving body possesses.The faster a molecule moves, the more kinetic energy it has, and the higher the measured temperature.

That being said, when the temperature of water is increased, there would be increased molecular motion leading to a higher kinetic energy.

Therefore, the average kinetic energy of water molecules is greatest in steam at 100°C.

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Answer:

The volume is 6, 28 liters

Explanation:

The unit of pressure and temperature must be converted. 760 Torr = 1 atm and 0°C=273 K.     20+273=293K

760 Torr---1 atm

1200Torr--x= (1200 Torr x 1 atm)/760 Torr =1,58 atm

PV=nRT V=(nRT)/P

V= (0,413 mol x 0,082 L atm /K mol x 293K)/ 1,58 atm

V=6, 28 L

Answer:

291.2L

Explanation:

Given parameters:

Number of moles of acetylene  = 13moles

Unknown:

Volume of acetylene at STP  = ?

Solution:

The problem can be solved by applying the equation that shows the relationship between the volume of gases at STP and their number of moles.

   Volume of gas at STP  = number of moles x 22.4

Input the variables and solve;

  Volume of gas at STP  = 13 x 22.4  = 291.2L

Final answer:

To find the number of Liters in 13 moles of Acetylene (C2H2) at STP, we use the Ideal Gas Law equation. Plugging in the given values, we find that there are approximately 302.19 Liters.

Explanation:

To determine the number of liters in 13 moles of acetylene (C2H2) at STP, we need to use the Ideal Gas Law. The Ideal Gas Law equation is PV = nRT, where P is pressure, V is volume, n is moles, R is the ideal gas constant, and T is temperature. At STP (standard temperature and pressure), the pressure is 1 atm and the temperature is 273.15 K. Since we are given the number of moles (13) and want to find the volume, we rearrange the equation to solve for V: V = nRT/P.

Plugging in the values, we get V = (13 mol)(0.08206 L·atm/mol·K)(273.15 K)/(1 atm) = 302.19 L.

Answer:

Magnet determine factor for the direction a motor spins in an electric motor.

Answer:

D

Explanation:

In an acid base reaction, the products are salt and water because acid base reactions react to neutralize the acid and base properties, producing a salt.

Hey there!

5 moles will be produced.

N₂ has a molar mass of 28.014 g/mol.

Convert 70g to mol:

70 ÷ 28.014 = 2.5

In N₂ there are 2 nitrogen atoms. In NH₃ there is 1 nitrogen atom.

So, there will be twice as many moles of NH₃ because every one molecule of N₂ will produce two molecules of NH₃.

2.5 x 2 = 5 moles

Hope this helps!