calculate the number of hydrogen atoms that are in 5.23g of glucose​

Answer:

\(\huge\boxed{\sf Ice\ Added = 210\ g}\)

Explanation:

Weight of glass of water before adding ice = 40 g

Weight of glass of water after adding ice = 250 g

Ice Added = 250 g - 40 g

Ice Added = 210 g

A chemical property is a characteristic of a specific substance that can be seen in a chemical reaction.

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To compare the effect of force on objects with different forces the acceleration must be constant and the air resistance have to be neglected.

Force is an external agent that acts on body to change it from the state of motion or rest. There are various kind of forces like gravitational force, frictional force, nuclear force etc.

In physics force is the product of mass and acceleration of a moving body. Thus F= ma. Hence, force is directly proportional to the mass and acceleration.

As the mass increases force acting on the body increases. Thus the force acting on 4 kg-metal will be higher.But to compare the same force on these three metal blocks, the acceleration must be constant. One more thing that the air resistance have to be neglected.

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Answer:

3.13%

Explanation:

Step 1: Given data

Mass of sodium chloride (solute): 3.60 g

Volume of solution: 115 mL

Step 2: Calculate the weight/volume % of the  solute

We will use the following expression.

%w/v = mass of solute / milliliters of solution × 100%

%w/v = 3.60 g / 115 mL × 100%

%w/v = 3.13%

The weight/volume % of the  solute is 3.13%

Answer:

3.13

Explanation:

correct

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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Answer:

1,000.000

Explanation:

The reaction of 2-Bromo-2-Ethyl-3-Methylbutane with methanol is an example of a nucleophilic substitution reaction.

In this reaction, the methanol molecule acts as a nucleophile and attacks the carbon atom of the bromoalkane, resulting in the displacement of the leaving group (bromine) and the formation of a new carbon-oxygen (C-O) bond.

The reaction mechanism can be described as follows:

Protonation: In the first step, the methanol molecule acts as a base and abstracts a proton from the sulfuric acid catalyst to form the methoxide ion (CH3O-).

Nucleophilic attack: The methoxide ion then attacks the carbon atom of the bromoalkane, which is electrophilic due to the electron-withdrawing effect of the bromine atom. The attack results in the formation of a transition state in which the carbon-bromine bond is weakened and the carbon-oxygen bond is forming.

Elimination: The transition state then collapses to form the product, methylethylmethylcarbinol, with the simultaneous loss of the bromide ion. This step is known as the elimination step and occurs as the newly formed C-O bond is more stable than the weakened C-Br bond.

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Answer: a: neutrons but it might be b

Explanation:

i learn this in 7 grade and it was a long time so i might be wrong

Answer:

I guess the answer is compound

Explanation:

Coz compound it is on there playing with me again Go ahead and paste it in the class

It will affect the population size through the following:

Gestational period is the period in which organisms carries its young in  the

uterus before delivery. Animals which have short gestational period have a

high birth rate as they can get pregnant as many times a possible during the

year.

This therefore brings about an increase in the individuals present in the

ecosystem. The option A is therefore the most appropriate choice.

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A weak base equilibrium as shown in the equation below.  the effect on Kb if  BH⁺ were added to the solution; the equilibrium constants  is remains unchanged.

The equation is given as :

B (aq) + H2O (l) ⇌ BH⁺ (aq) + OH⁻ (aq)

K = [ BH⁺ ] [ OH⁻] / [B]

the equilibrium constant  for the given reaction is remain unchanged. the equilibrium constant will only depends on the temperature of the reaction.

Thus, A weak base equilibrium as shown in the equation below.  the effect on Kb if  BH⁺ were added to the solution; the equilibrium constants  is remains unchanged.

B (aq) + H2O (l) ⇌ BH⁺ (aq) + OH⁻ (aq)

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Answer:Compounds are chemical substances that contain more than one element. They're created during a chemical reaction where atoms are rearranged into new compound molecules. For example, if carbon atoms react with oxygen atoms they form carbon dioxide molecules.

Explanation:

Mass of the tin = 31.4g

The volume of tin = 4.3 \(cm^{3}\)

The density of tin = D

We know that

\(Density = \frac{Mass}{Volume} \\D = \frac{31.4}{4.3} \frac{g}{cm^{3} }\)

\(D = 7.302 g/cm^{3}\) ≈ \(10 g/cm^{3}\)

Measurement of density contrasts the mass of an object with its volume. High density refers to the amount of matter in a given volume of an object. We shall discover what density is in this post, along with its definition and measurement systems.

The density of a substance indicates how dense it is in a particular area. Mass per unit volume is the definition of a material's density.

In essence, density is a measurement of how closely stuff is packed.

It is a special physical characteristic of a certain thing. The Greek scientist Archimedes made the discovery of the density principle.

If you are familiar with the formula and the relevant units, calculating density is simple. The letter D can also be used to signify density instead of the symbol.

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The species that is oxidized and the species that is reduced in the reaction are: \(Cl_{2}\) is oxidized and \(I^{-}\)is reduced.

What are the species?

The species in a chemical reaction are the reactants and products involved in the reaction. The reactants are the substances that undergo a chemical change, while the products are the substances that are formed as a result of the chemical change.

What are the substances?

Substances refer to the chemical elements or compounds that make up the reactants and products in a chemical reaction.foe example, Hydrogen gas and oxygen gas are the reactants, while water is the product.

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Complete question is: The species that is oxidized and the species that is reduced in the reaction are: \(Cl_{2}\) is oxidized and \(I^{-}\)is reduced.

Answer:

its answer is (Acetylene)

The kJ of the energy absorbed for the every mole of the carbon reacted is 104.8 kJ.

The chemical equation is as :

2C + 2H ---> C₂H₄   ,     ΔH = + 52.4 kJ/mol

The ΔH is the enthalpy change that is determined by the subtracting the energy of the reactants to the products.

The  ΔH = energy of the products - energy of the reactants

The expression for the energy is as :

q = n ΔH

Where,

n = number of the moles

ΔH = enthalpy change

The kJ of the energy absorbed for the every mole of the carbon reacted :

q = 2 mol × 52.4 kJ/mol

q = 104.8 kJ

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Answer:

\(Cp_{metal}=39.0\frac{J}{g\°C}\)

Explanation:

Hello,

In this case, since the following equation relates heat, mass, specific heat and temperature:

\(Q=mCp(T_2-T_1)\)

For the two substances, we say that the heat lost by the metal equals the heat gained by the water, thus we have:

\(m_{water}Cp_{water}(T_2-T_{water})=-m_{metal}Cp_{metal}(T_2-T_{metal})\)

Thus, the specific heat of the metal turns out:

\(Cp_{metal}=\frac{m_{water}Cp_{water}(T_2-T_{water})}{m_{metal}(T_2-T_{metal})}\)

Therefore, we obtain:

\(Cp_{metal}=\frac{125g*4.18\frac{J}{g\°C} *(31.0-91.0)\°C}{-134.0g*(31.0-25.0)\°C}\\\\Cp_{metal}=39.0\frac{J}{g\°C}\)

Best regards.

Answer:

when placed in water, a sodium pellet catches on fire as hydrogen gas is liberated and sodium hydroxide forms. chemical change = fire is a sign of chemical reaction.

Explanation:

When placed in water the sodium pellets catch the fire and liberate the hydrogen gas. On mixing with water solid sodium forms a colorless basic solution.

Sodium is a soft metal. It is a very reactive element with a low melting point. Sodium reacts very quickly with water, snow, and ice to produce sodium hydroxide and hydrogen. It is an alkali metal and the sixth most abundant metal on earth. It has a silvery white color.

It has a strong metallic luster. On reacting with oxygen it produces sodium oxide which on reacting with the water produces sodium hydroxide.

It is used to improve the structure of certain alloys and soaps. It is also used in the purification of metals. Sodium is also present in sodium chloride, an important compound found in the environment.

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The number of atoms of hydrogen present in one mole of ammonium nitrate would be 2.41 x 10^24 atoms. Option C.

The chemical formula for ammonium nitrate is NH4NO3. In one mole of NH4NO3, there is one mole of the NH4+ ion, which contains four hydrogen atoms.

Therefore, the number of hydrogen atoms present in one mole of NH4NO3 is:

4 hydrogen atoms/mole x 1 mole NH4+ ion/mole NH4NO3 = 4 hydrogen atoms/mole NH4NO3

Using Avogadro's number, we can calculate the total number of hydrogen atoms in one mole of NH4NO3:

4 hydrogen atoms/mole NH4NO3 x 6.02 x 10^23 molecules/mole NH4NO3 = 2.41 x 10^24 hydrogen atoms/mole NH4NO3

Therefore, the answer is option C: 2.41 x 10^24 atoms.

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From the equation 2PbS + 3O2 ⟶ 2Pb + 2SO3 we can produced 8.12 g of lead  if 2.54 g of PbS is burned with 1.88 g of O2.

To find the mass of lead produced, we need to find the limiting reactant (i.e. the reactant that is consumed first).

We can find the limiting reactant by calculating the number of moles of each reactant and then using the mole ratio from the balanced equation.

Number of moles of PbS = mass / molar mass = 2.54 / 239.27 = 0.0106 mol

Number of moles of O2 = mass / molar mass = 1.88 / 32 = 0.0588 mol

From the balanced equation, the mole ratio of PbS to O2 is 2:3.

Therefore, for every 2 moles of PbS, we need 3 moles of O2.

We can use this information to calculate how many moles of O2 are needed for 0.0106 moles of PbS.0.0106 mol PbS × (3 mol O2 / 2 mol PbS) = 0.0159 mol O2.

Since the actual amount of O2 we have is less than what is needed (0.0159 mol), O2 is the limiting reactant.

This means that PbS is in excess and we can calculate the mass of lead produced using the amount of O2 that reacted.

The balanced equation tells us that 3 moles of O2 produce 2 moles of lead.

Therefore,0.0588 mol O2 × (2 mol Pb / 3 mol O2) = 0.0392 mol PbFinally, we can calculate the mass of lead produced using the number of moles and the molar mass of lead.mass of Pb = number of moles × molar mass= 0.0392 mol × 207.2 g/mol= 8.12 g.

Therefore, 8.12 g of lead will be produced if 2.54 g of PbS is burned with 1.88 g of O2.

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Answer:

C. Because my teacher said so

Hope this helps :)

Answer:

Because my teacher said so

Explanation:

You good? lol

Answer:

C2H8N

Explanation:

it wont change since there is no common factor between the 2:8:1 which will give us a whole number so it stays the same

Answer:

c. The scientists’ calculations were incorrect; the energy totals should have been the same.

Explanation:

We must remember that energy can not be created nor destroyed according to the law of conservation of mechanical energy.

The total energy of a body remains a constant throughout its motion. For a body rolling down a ramp, the energy  changes from potential to kinetic + potential and then to kinetic.

In all of these stages of its motion, the total energy of the glass marble remains constant.

Answer:

b

Explanation:

b

Answer:

1) easy compressed

2) fills its container

3) far more space

Explanation:

Answer:

Power of a machine is defined as its rate of doing work. It is the rate of transfer of energy. SI unit of power is watt. The power of a machine is said to be one watt if it can work at the rate of one joule in one second.

Explanation:

Brainliest please?

Answer:

silicon tetrachloride or tetrachlorosilane