What is the molar mass of H2SO4?

Answer:

Where are all my chemistry geniuses at?

1. The pattern of electronegativities would increase as you go across a period and would decrease as you go down a group in the periodic table.

2.  There is a correlation between electronegativity and atomic radius.  As electronegativity increases, atomic radius decreases. As electronegativity decreases, atomic radius increases. This would make sense because as a atomic radius increases, them more farther away the electrons are away from the nucleus because of their many subshells  making it less electronegative. As atomic radius decreases, the electrons are more closer to the nucleus because of their few subshells making the element more electronegative.

3. There is a correlation between ionization energy and electronegativity.  As electronegativity increases, ionization energy increases as well. If it decreases, ionization energy decreases too. This makes sense because the more electronegativity the element, the more they are closer to the nucleus(making them harder to remove) and the more desperate for an electron the atom is.

Explanation:

Hope it helped!

The elements are placed in groups and periods on the contemporary periodic table, according to this definition. The elements are organized in the current periodic table in order of increasing atomic number. This periodic table has 7 periods and 18 groupings. Horizontal rows form the arrangement of the periods.

Chemistry is the branch of science that examines the characteristics, make-up, and structure of substances (specified as elements and compounds), as well as the changes they go through and the energy released or absorbed. Every substance, whether created through natural processes or through man made means, is made up of one or more of the roughly a hundred types of atoms that have been classified as elements.

According to the question, groups are :

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Answer:

Only thing that should hold constant is the Density of the water

Explanation:

Since you are removing some of the water, the Mass and Volume will decrease.

Density of the water are the properties should have the same value for both of her measurements.

The density can be described as the mass per unit volume like it is the ratio between mass and volume, how much stuff an object has in a unit volume.

Density is a determining factor of matter, where it shows how tightly the matter is crammed together, the term was discovered by the Greek scientist Archimedes

The density can be calculated as the mass (m) can be divided by the volume (v)

Density = Mass/Volume

The SI unit of density is kilogram per cubic meter (kg/m3).

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Hii there !

The reaction accompanying production of water in this case would be -

\(\green{ \underline { \boxed{ \sf{H_2+ \frac{1}{2}O_2\longrightarrow H_2O}}}}\)

Thus ,by observing the reaction, we can conclude that 1 mole of Hydrogen (H\(_2\))react with 1/2 mole of oxygen(O\(_2\))to produce 1 mole of water (H\(_2\)O)

\(\implies\)Therefore, 37.0 moles of hydrogen(H\(_2\)) will be required to produce 37.0 moles of water.

Hope it helps.

The acid pH in the vagina is predominantly due to Lactobacillus fermenting the glycogen present in vaginal cells. Therefore option D is correct

Lactobacillus is a type of bacteria that is commonly found in the healthy vaginal microbiota. These bacteria play a crucial role in maintaining the acidic environment of the vagina, which is important for its overall health. Lactobacillus species have the ability to ferment glycogen, a complex carbohydrate that is stored in vaginal cells.

During fermentation, Lactobacillus breaks down glycogen into lactic acid. This process leads to the production of lactic acid, which lowers the pH of the vaginal environment, making it acidic.

The acidic pH provides a hostile environment for pathogenic bacteria and helps to prevent infections.

It's important to note that the presence of other bacteria, such as Staphylococcus or Escherichia coli, in the vaginal microbiota is not typically associated with maintaining the acidic pH.

These bacteria may be present in the vaginal ecosystem, but they do not have the same role as Lactobacillus in acidifying the environment through glycogen fermentation.

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Your question is incomplete, but most probably your full question was,

The acid pH in the vagina is predominantly due to ______ fermenting the _____ present in vaginal cells.

a) Staphylococcus, glycogen

b) Escherichia, glucose

c) Staphylococcus, starch

d) Lactobacillus, glycogen

the Celsius temperature of 1.50 moles of ammonia contained in a 10.0 L vessel under a pressure of 2.0 atm is approximately -56.15 C. The closest answer choice to this value is -50 C.

To determine the Celsius temperature of 1.50 moles of ammonia contained in a 10.0 L vessel under a pressure of 2.0 atm, we can use the Ideal Gas Law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

T = PV/nR

T = (2.0 atm) x (10.0 L) / (1.50 moles x 0.08206 L atm/K mol)

T = 217 K

To convert this temperature to Celsius, we can simply subtract 273.15 K:

T(Celsius) = 217 K - 273.15

T(Celsius) = -56.15 C

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Answer:

2x1000 = 2000

Explanation:

10^3 = 10×10×10 = 1000

exponent , the ^3 means multiply the number by itself 3 times, if it was ^4, it would be 4 times and so forth.

another trick for 10s is just put the 1 and the exponents number of 0's after the 1. so in this case, put three 0's: 1,000

Answer: 2000 or 2000.00 in decimal form if you need

Explanation: Real number to turn Scientific to Real Number you must type the exact scientific notation into a scientific calculator including the Times symbol and it should convert it In other words Multiply the decimal number by 10 raised to the power indicated. Ex: 3.456 x 10^4 = 3.456 x 10,000 = 34560

Molality is term used for the amount of solute in moles per kilogram of solvent.

Generally, molality (m) is defined as the number of moles of solute per kilogram of solvent.

The formula for molality is given as:

Molality (m) = moles of solute / kilograms of solvent.

Students must remember that molality is used to measure the moles in relation to the mass of the solvent and not the mass of the solution.

Molality can also be defined as the “total moles of a solute contained in a kilogram of a solvent.” The other name of molality is also known as molal concentration which is a measure of solute concentration in a solution.

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Answer:

See explanation.

Explanation:

Heavy metal or something else that is heavily disordered. Would still sound better than cardi b.

884.99 g of copper(II) sulfide would be formed if 18.5 moles of copper reacts.

The balanced equation for the reaction between copper and sulfur is:

2 Cu + S₈ → 2 CuS

This equation shows that 2 moles of copper react with 1 mole of sulfur to produce 2 moles of copper(II) sulfide.

Therefore, for every 2 moles of copper that react, 2 moles of copper(II) sulfide are produced.

To determine the mass of copper(II) sulfide formed, we need to know the mass of copper that reacted. We can use the molar mass of copper to convert the number of moles of copper to its mass:

m(Cu) = n(Cu) × M(Cu)

m(Cu) = 18.5 mol × 63.55 g/mol

m(Cu) = 1174.18 g

So, 1174.18 g of copper reacted. Using the stoichiometric coefficients from the balanced equation, we can calculate the number of moles of copper(II) sulfide formed:

n(CuS) = n(Cu) / 2

n(CuS) = 18.5 mol / 2

n(CuS) = 9.25 mol

Finally, we can use the molar mass of copper(II) sulfide to convert the number of moles to its mass:

m(CuS) = n(CuS) × M(CuS)

m(CuS) = 9.25 mol × 95.61 g/mol

m(CuS) = 884.99 g

Therefore, 884.99 g of copper(II) sulfide would be formed if 18.5 moles of copper reacts.

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Answer: Solar eclipse

Explanation:

Answer:

I think it's D

Explanation:

I'm so sorry if that's wrong, hope it helps!

The temperature at which the vapor pressure of a substance equals the air temperature at sea level. Therefore, the correct option is option D.

The temperature at which a liquid's vapor pressure equals the pressure around it and the liquid transforms into a vapor is known as the boiling point of a material.

A liquid's boiling point changes based on the atmospheric pressure in the area. Lower pressure, or partial vacuum, results in a liquid's boiling point being lower than it would be under atmospheric pressure. The temperature at which the vapor pressure of a substance equals the air temperature at sea level.

Therefore, the correct option is option D.

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Explanation:

\(v = vdm \times n\)

Vdm=22.4dm.

mole(n)=4 mol

therefore the total volume

\(v = 22.4 \times 4 \\ v = 89.6dm\)

Answer:

The second student is right.

Explanation:

The coyote feed on not only phalaropes but many other organisms present in the environment for its survival. There are many other organisms present in the ecosystem such as mice, squirrel, cactus fruit etc. The coyote feeds on phalaropes, the phalaropes feeds on brine shrimp and the brine shrimp feeds on algae for its survival so in this way the ecosystem moves in the forward direction. The coyote feeds on phalaropes so the energy that is present in phalaropes transferred into coyote which only 10 % while the remaining is released in the atmosphere in the form of heat energy.

Answer:

A catalyst is a substance that is not used up during a reaction.

The definition of a catalyst is that it speeds up the reaction and is not chemically changed so it is not used up during the reaction.

A catalyst does not affect the products obtained in the reaction.

It only affects the rate of reaction, not the product.

A catalyst changes the pathway of the reactants to products in a way that reduces the activation energy and speeds up the reaction.

Refer to the picture.

Answer:

324 meters

Explanation:

I don't really have an explanation

The cyclic disulfide shown below has two disulfide bonds (-S-S-). When it is reduced, the disulfide bonds break and two thiol (-SH) groups are formed. The dithiol that is formed depends on which disulfide bond is reduced.

If the disulfide bond between carbons 1 and 5 is reduced, then dithiol 1 will be formed. If the disulfide bond between carbons 2 and 4 is reduced, then dithiol 2 will be formed. If the disulfide bond between carbons 3 and 6 is reduced, then dithiol 3 will be formed. Finally, if the disulfide bond between carbons 7 and 8 is reduced, then dithiol 4 will be formed.

The specific dithiol that is formed when the cyclic disulfide is reduced depends on which disulfide bond is reduced. The answer to the question cannot be determined without more information about which bond is being reduced.

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The volume of a bar of soap that has a density of 2.5 g/cm3 and a mass of 100 g is 40 cm ³. Therefore, option D is correct.

The mass of a substance per unit of volume is its density. A mechanically accepted measure is density. Density is most frequently represented by the symbol, however the Latin letter D may also be used.

The mass of a solid substance's unit volume. d = M/V, where d is density, M is mass, and V is volume, is the formula for density. Grams per cubic centimeter are a typical unit of measurement for density.

Density = m / V

volume = mass / density

= 100 / 2.5

= 40 cm³

Thus, option D is correct.

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Answer:

B. X represents phosphorus

Explanation:

In an isotope symbol, you write the mass number above the atomic number. So the 31 represents the mass of the protons and neutrons of the element added together, and the 15 represents the atomic number or the total number of protons in the nucleus.

Answer:

Magnesium

  Zinc

 Iron

Copper

Explanation:

The given elements are:

 Magnesium, copper, iron and zinc

 We are to put them in the order from the least reactive to the most reactive of all.

To solve this problem, we simply use the activity series of metals to arrange the elements.

The activity series arranges metals from the most reactive to the least reactive. The more reactive metals displaces the lesser one from solutions.

  So;

      Magnesium

       Zinc

       Iron

       Copper

In recrystallization, the use of a small rinse volume helps to retain more of the desired product and minimize loss during the purification process.

Recrystallization is a method used to purify solid compounds. It involves dissolving the compound in a suitable solvent and then slowly cooling the solution.

As the solution cools, the solute (compound) crystallizes out, leaving behind impurities in the solvent.

To prevent the dissolution of the product in the solvent, the volume of the rinses in the recrystallization process is kept small.

If the rinses have a large volume, there is a risk of losing some of the desired product along with the impurities.

By minimizing the volume of the rinses, the loss of product can be reduced, improving the overall yield and purity of the final crystallized compound.

In recrystallization, the use of a small rinse volume helps to retain more of the desired product and minimize loss during the purification process.

This ensures a higher-quality final product with reduced impurities.

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Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question

mass = 13 g

density = 19.3 g/cm³

We have

\(volume = \frac{13}{19.3} \\ = 0.673575...\)

We have the final answer as

Hope this helps you

Answer: They are both chemical changes.

Explanation:

The molecule that is a triglyceride is (c) CH2OH-CO-CH2OH.

Triglycerides are a type of lipid molecule composed of a glycerol backbone and three fatty acid chains.

The glycerol backbone consists of three carbon atoms, each of which can bind to a fatty acid chain. The fatty acid chains are long hydrocarbon chains with a carboxyl group at one end.

Looking at the given options, (c) CH2OH-CO-CH2OH represents a glycerol molecule. The presence of three hydroxyl groups (-OH) indicates that it is a glycerol molecule, which is the backbone of triglycerides.

However, the given molecule does not have any fatty acid chains attached to the glycerol backbone.

Triglycerides are formed when the hydroxyl groups of the glycerol molecule react with the carboxyl groups of fatty acid chains, resulting in the formation of ester bonds.

Since the given molecule lacks fatty acid chains, it is not a complete triglyceride.

Therefore, among the given options, none of the molecules provided can be identified as a complete triglyceride.

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Answer:

wavelength

n

n

n

n

n

n

n

in

n

Answer: wavelength:)

Explanation:

A reaction occurs as a result of the combination of reactants and products.

We have to learn that a reaction occurs as a result of the combination of reactants and products. We know that the products formed may often be quite different from the reactants that were combined to produce them.

Having said so, let us look at the equations one after the other;

Mg + 2HCl ------> MgCl2 + H2. There is the evolution of a colorless and odorless gas that gives a pop sound with glowing splint.

CuCl2 + HCl ----> There is no observation

2NaHCO3 + H2SO4 --> Na2SO4 + 2H2O + 2CO2 - There is evolution of a gas that turns lime water milky

CuO + H2SO4 → CuSO4 + H2O - The solution turns blue and there is no effect both on lime water and glowing splint.

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Ammonia has a molar mass of 17 g/mol. Ammonia weighs 68 grammes, or 17g/mol. 68g​=4moles From 241 = 2 moles of nitrogen and 243 = 6 moles of hydrogen, 4 moles of ammonia will be produced. Nitrogen and hydrogen have molar weights of 28 g/mol and 2 g/mol, respectively. 56 grammes are equivalent to 2 moles of nitrogen, or 228. 6 moles of hydrogen are equivalent to 12 grammes (62).

From 50.0 grammes of the nitrogen gas 3h2 N2 --> 2nh3, how many grammes of ammonia are produced?

We need to determine how many moles of nitrogen there are in this 50 g of nitrogen gas. We would generate 1.792=3.58 moles of ammonia from this point. 3.58 mol; 17.031 gmol; 61 g of NH3

42 grammes of nitrogen may be converted into how many grammes of ammonia?

b The mass of N and H in the ammonia molecule, NH3, is equal to 14 + 3 1 = 17. The amount of H needed to react with 14 g of N is 3 g. Hence, the mass of H needed to react with 42 g of N is equal to 3/14 42 = 9 g.

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Milk and starch solutions are colloids , so they will show tyndall effect, Solutions do not exhibit the Tyndall effect, but colloids do.

Option B and D are correct.

The dissipating of light by the colloid particles is known as the tyndall impact. Consequently, it very well may be reasoned that colloids show tyndall impact on the grounds that their particles are sufficiently enormous to disperse the light emission going through them. Milk and starch arrangement are colloids, consequently they show tyndall impact.

The scattering of light is connected to the Tyndall effect. The phenomenon of light scattering by particles in a colloid solution or very fine suspension is known as the Tyndall effect.

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