A group of students collects data to determine whether compounds were ionic or covalent. They placed each compound in a

small bowl and stuck two open ends of a battery-powered circuit in the compound,

CO2 (s)

KCI (s)

CaO (S)

Compound

Conductive

SIO2 (s)

No

No

No

No

Based on the student's data, can they determine which substances are ionic, and which are covalent?

A No, as ionic compounds are only conductive in an aqueous (water) solution

B Yes, as all of these compounds are ionic since they are not conductive.

No, as covalent compounds are only conductive in an aqueous (water) solution

Yes, as all of these compounds are covalent since they are not conductive

Answer:

A. 7

(assuming the water is neutral)

The mass of oxygen is 76.32 g

Stoichiometry is the study of the quantitative relationships between reactants and products in a chemical reaction. It refers to the mole ratios of the reactants and products involved in a reaction.

We know that;

Number of moles of  maleic acid anhydride = 52.1 grams /98 g/mol

= 0.53 moles

If 9 moles of oxygen produces 2 moles of  maleic acid anhydride

x moles of oxygen will produce 0.53 moles  of  maleic acid anhydride

x = 2.385 moles

Mass of oxygen =  2.385 moles * 32 g/mol

= 76.32 g

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There are 5.22 moles of oxygen in 5.22 mol of NaClO4.

To determine the number of moles of oxygen in 5.22 mol of NaClO4, we need to examine the molecular formula of NaClO4.

The molecular formula of NaClO4 indicates that there is 1 oxygen atom in each NaClO4 molecule. Since 1 mole of a substance contains Avogadro's number of particles (6.022 x 10^23), we can conclude that 1 mole of NaClO4 contains 6.022 x 10^23 oxygen atoms.

Therefore, to find the number of moles of oxygen in 5.22 mol of NaClO4, we can multiply the number of moles of NaClO4 by the number of oxygen atoms per mole.

5.22 mol NaClO4 * (6.022 x 10^23 oxygen atoms / 1 mol NaClO4) = 3.14 x 10^24 oxygen atoms.

To convert this to moles, we divide by Avogadro's number:

(3.14 x 10^24 oxygen atoms) / (6.022 x 10^23 oxygen atoms/mol) = 5.22 moles of oxygen.

Therefore, there are 5.22 moles of oxygen in 5.22 mol of NaClO4.

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To solve this problem, we first need to write and balance the chemical equation for the reaction between strontium chloride and sulfuric acid:

SrCl2 + H2SO4 → SrSO4 + 2HCl

According to the balanced chemical equation, one mole of strontium chloride reacts with one mole of sulfuric acid to produce one mole of strontium sulfate and two moles of hydrochloric acid.

Next, we need to calculate the number of moles of sulfuric acid we have:

moles of H2SO4 = mass of H2SO4 / molar mass of H2SO4

moles of H2SO4 = 300.0 g / 98.08 g/mol

moles of H2SO4 = 3.057 mol

Finally, we can use the stoichiometry of the balanced chemical equation to determine the number of moles of strontium chloride that will react with 3.057 moles of sulfuric acid:

moles of SrCl2 = moles of H2SO4

moles of SrCl2 = 3.057 mol

Now we can calculate the mass of strontium chloride using its molar mass:

mass of SrCl2 = moles of SrCl2 x molar mass of SrCl2

mass of SrCl2 = 3.057 mol x 158.53 g/mol

mass of SrCl2 = 485.1 g

Therefore, 485.1 grams of strontium chloride will react with 300.0 grams of sulfuric acid.

Explanation:

To solve this problem, we use stoichiometry, which is a method that relates the amount of reactants and products in a chemical reaction based on their balanced chemical equation. In this case, we first write and balance the chemical equation for the reaction between strontium chloride and sulfuric acid. Then, we calculate the number of moles of sulfuric acid given its mass and molar mass. Next, we use the stoichiometry of the balanced chemical equation to determine the number of ontium chloride that will react with the given amount of sulfuric acid. Finally, we calculate the mass of strontium chloride using its molar mass and the calculated number of moles. By following these steps, we can determine the mass of strontium chloride that will react with 300.0 grams of sulfuric acid.

Answer:

Eukaryotes

Explanation:

Answer: MgCl2

Explanation:

There will be two Chlorine atoms, and one Magnesium atom. The Mg atom will transfer one valence electron to each Chlorine atom to make them stable. I don't know the reaction that happens, I'm Sorryy. But yeah... have a nice day! :)

According to ideal gas law ;

PV = nRT where, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the total amount of ideal gas that is measured in terms of moles, R is the universal gas constant, and T is the temperature.

If Volume of system is reduced to half = V/2

then; P = 2(nRT/V), Pressure will be doubled to reestablish the equilibrium.

What is Chemical equilibrium?

Chemical equilibrium, condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs. A reversible chemical reaction is one in which the products, as soon as they are formed, react to produce the original reactants.

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Answer:

just answer this and you will have yours

Explanation:Find the area of a circle with a diameter of \color{green}{16}16start color green, 16, end color green.

Either enter an exact answer in terms of \piπpi or use 3.143.143, point, 14 for \piπpi and enter your answer as a decimal.

Answer:

Its actually Q = 103.2 J

Explanation:

Answer:

The pH of a solution with the [H + ] = 1 × 10 -2 M is 2 and the pH of a solution with the [H + ] = 1 × 10 -10 M is 10. ( I think this is correct ).

Explanation:

Answer:

I need more information. What is the question?

Answer:

what are the statements?

Explanation:

Answer:

Correct answer is A) Protons

Explanation:

I got it right on my test.

Can i get brainlyest

Answer:

See explanation

Explanation:

Since the -CH3CN and the -F are in 1,4 position, then the synthesis started with flourobenzene. This has to be because -F is ortho-para directing in nucleophilic substitution.

The next step is the Friedel craft alkylation of the substrate. The alkyl group is directed to the para position by the -F.

Bromination using NBS yields an alkyl bromide that undergoes SN2 substitution to yield the target compound.

14 grams of calcium oxide.

Thermal decomposition of 25 grams of calcium carbonate would result in the production of 14 grams of calcium oxide.

We know that,

CaCO₃ → CaO + CO₂

First, the following quantities react and are generated according to the stoichiometry of the reaction, which is the relationship between the amounts of reagents and products in a chemical reaction:

Being:

The following mass amounts of the compounds involved in the reaction then react and are created, according to the reaction's stoichiometry:

How much calcium oxide will be produced if, according to the stoichiometry of the reaction, 100 grams of calcium carbonate CaCO3 result in 56 grams of calcium oxide CaO and 25 grams of CaCO3?

mass of calcium oxide = \(\frac{25 grams of CaCO3 + 56 grams CaO}{100 grams of CaCO3}\)

mass of calcium oxide= 14 grams

14 grams of calcium oxide would be produced by thermal decomposition of 25 grams of calcium carbonate.

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Sodium is heated, a yellow spectral line whose energy is 3.37 x 10-19 j per photon is produced. The frequency of this light is 5.08 x 10^14 Hz

The frequency of light can be calculated using the equation: frequency (ν) = energy (E) / Planck's constant (h).

In this case, the energy of the photon is given as 3.37 x 10^-19 Joules, and Planck's constant is approximately 6.63 x 10^-34 Joules seconds.

So the frequency of this light would be:

ν = E / h

= (3.37 x 10^-19 Joules) / (6.63 x 10^-34 Joules seconds)

= 5.08 x 10^14 Hz

This is a very high frequency, which corresponds to a very short wavelength, in the ultraviolet range of the electromagnetic spectrum.

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To prevent more than one sperm from entering the egg.

What is oocyte?

An oocyte , or ovocyte is a female gametocyte or germ cell involved in reproduction. In other words, it is an immature ovum, or egg cell. An oocyte is produced in a female fetus in the ovary during female gametogenesis. The female germ cells produce a primordial germ cell (PGC), which then undergoes mitosis, forming oogonia. During oogenesis, the oogonia become primary oocytes. An oocyte is a form of genetic material that can be collected for cryoconservation.

When the sperm and egg fuse it triggers a release of calcium ions, which cause the cortical granules inside the egg to fuse with the plasma membrane. As they fuse, these granules release their contents outside of the cell, toward the remains of the zona pellucida.

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One adaptation that organisms living in an aquatic ecosystem might have is the ability to regulate their salt concentration.

Organisms are living species that live on the planet earth.

There are types of organisms categorized by the environment they live.

Organism that can survive only in water is called an aquatic organism.

We have,

One adaptation that organisms living in an aquatic ecosystem might have is the ability to regulate their salt concentration.

Aquatic environments can have varying levels of salinity, and some organisms need to maintain a specific salt concentration in their bodies to survive.

For example, marine fish have kidneys that can produce very concentrated urine to prevent them from losing too much salt in their surroundings, while freshwater fish have specialized cells in their gills that actively pump salt out of their bodies to maintain the appropriate balance.

Similarly,

Some marine invertebrates, such as crabs and mussels, can regulate the amount of salt they take in by actively transporting ions across their gills or other specialized structures.

This adaptation helps the organism to maintain the proper fluid balance and avoid dehydration or over-hydration, which can be lethal.

Thus,

One adaptation that organisms living in an aquatic ecosystem might have is the ability to regulate their salt concentration.

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Answer:

The sun, like all stars, is able to create energy because it is essentially a massive fusion reaction. Technically known as nuclear fusion, this process releases an incredible amount of energy in the form of light and heat.

Types of energy produced: Stars produce energy from nuclear reactions, primarily the fusion of hydrogen to form helium.

Explanation:

hope this helped :D

753.25 kj  is the amount of heat energy that must be transferred to convert the ice to steam at 100 oc.suppose you start with 247g of ice at 0 oc.

E = mct

Where E is the energy for a phase change, m is the mass of the object, c is the specific heat capacity and t is the change in temperature.

So ignoring the latent heats' at present we can deduce that the energy required to raise the temperature of a 250g (0.25kg) block of ice by 100 degrees Celsius is:

E = 0.25*4.19*100 = 104.75kJ

Now the latent heats' tell you the energies absorbed when the ice changes state from solid to liquid to gas. This increase in energy does not change the temperature as it is used solely to create the intermolecular bonds that give rise to a change of state.So to find the total heat energy required for the conversion of the ice to steam, we just need to add the latent heats' of fusion and vaporisation.Note that the latent heats are given per kilogram so so they need to be multiplied by the mass of the ice block; this gives:

E = 104.75 + 0.25(334 + 2.26X10^3) = 104.75 + 0.25(2594) = 753.25kJ

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Answer:

Nerve or muscle damage in the eye might cause double vision. Each eye creates its own image of the environment. The brain combines the representations from each eye and perceives them as one clear picture. Damage to the muscles that move the eyes or the nerves that control eye movement can create a double image.

Explanation:

Answer:

poh = .253

p h2o= p[H+] +P[OH-]

ph2o is 14

14= pH+ + poH

14 = pH+ +.253

14-.253 =pH+

13.747 =ph+

and we know that

log [H+] = -pH+

[H+] = antilog pH+

H+ = antilog 13.747

H+ = 1.79×10-15

Answer:

Nucleas is a cell organelle

The option that is a type of cell organelle would be D.Nucleus

A nucleus is a membrane-bound organelle that contains the cell's DNA. It is the control center of the cell, and it is responsible for storing genetic information and directing the cell's activities.

The other options are not cell organelles. Membrane is a  phospholipid bilayer that surrounds the cell and separates the cell's interior from the environment. Cytoplasm is the jelly-like substance that fills the cell and contains the cell's organelles. DNA is the genetic material of the cell, but it is not an organelle.

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The pH of a 0.01 M solution of a weak acid with a pKa of 6 is 4.

To calculate the pH of a 0.01 M solution of a weak acid with a pKa of 6,

1. Write down the given values: pKa = 6, [Acid] = 0.01 M.
2. Calculate the Ka value using the pKa: Ka = 10^(-pKa) = 10^(-6).
3. Use the Ka expression to set up an equation for the acid ionization:
  Ka = [H+][A-]/[HA],

where [H+] is the concentration of hydrogen ions, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.
4. Since the acid is weak, assume that the initial concentration of [A-] and [H+] is negligible compared to the initial concentration of the acid.
5. As the acid ionizes, the concentration of [H+] and [A-] will increase by x, while the concentration of [HA] will decrease by x.
6. Write the equation with the new concentrations: Ka = (x)(x)/(0.01 - x).
7. Because the acid is weak, we can assume that x is much smaller than 0.01, so the equation can be simplified to Ka = x^2/0.01.
8. Solve for x: x^2 = Ka * 0.01 = 10^(-6) * 0.01.
9. Find the square root of both sides to find the concentration of [H+]: [H+] = x = sqrt(10^(-6) * 0.01) = 10^(-4) M.
10. Finally, calculate the pH using the formula

pH = -log[H+]:

pH = -log(10^(-4)) = 4.

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Answer:

I guess the answer is b.atomic theories

Answer:

This is because it is a physical change not a chemical change.

We need to add 0.43 moles of NaOH to the buffer. This is equivalent to adding 2.59 L of 6.01 M NaOH to the buffer.

To calculate the amount of 6.01 M NaOH required to raise the pH of the buffer, we first need to determine the current pH of the buffer. Using the Henderson-Hasselbalch equation, we can calculate that the pH of the buffer is 4.76. To raise the pH to 5.75, we need to add enough NaOH to increase the [OH-] concentration by a factor of 10.

This means we need to add 10 times the amount of H+ ions in the buffer solution. From the balanced chemical equation for the ionization of acetic acid, we know that for every mole of acetic acid that ionizes, it produces one H+ ion. Therefore, we need to add 0.43 moles of NaOH to the buffer. This is equivalent to adding 2.59 L of 6.01 M NaOH to the buffer.

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Answer: The hydroxide cation (OH -) and the phosphate cation (PO 4 3-) are both polyatomic ions.

Explanation:

Answer:

OH - and PO 4 3- are both polyatomic ions

1.6 moles of reactant will be in excess .

What is reactant?
A reagent, also known as an analytical reagent, is a substance as well as compound that is added to a system in order to trigger a chemical reaction or determine whether one has already occurred. Although the words "reagent" and "reactant" are frequently used interchangeably, "reactant" refers to a substance that is consumed during a chemical reaction. Even though they are part of the reaction's mechanism, solvents aren't typically referred to as reactants. Catalysts aren't reactants either because they aren't used up in the reaction. Reactants are frequently referred to as substrates in biochemistry, particularly in relation to enzyme-catalyzed reactions.

By using stoichiometric ratio
5 moles of o2 required to react with 4 moles of nh3
1 moles of o2 required = 4/5 moles of nh3

Here,
When we have 3 moles of o2
then 3 moles of o2 required =  4/5 x 3
                                              = 12/5 moles
                                              = 2.4 moles
then excess of moles of nh3 will be 4 - 2.4 = 1.6.

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Answer:

false

Explanation:

According to the law of conservation of energy, energy can neither be created nor destroyed but can be converted from one form to another. Hence, the given statement is true.

According to law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of energy is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Julius Robert Mayer in the year 1842.

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