What is the percent by mass of oxygen (O) in NaHCO3?

Answer:0.87

Explanation:

Answer:

The change in smell

Explanation:

chemical reactions ccan lead to change in temperature, change in color and also change in smell

The molecular formula of the compound CH2 with molar mass = 42.0 g/mol is C₃H₆. Therefore, option D is correct.

The term molar mass is defined as the mass in grams of one mole of a substance. The units of molar mass are grams per mole, abbreviated as g/mol.

First, let's find the molar mass of CH₂.

The molar mass CH₂= 12.0 + (2 x 1.01)

= 14.02 g/mol

Now to determine the molecular formula, we need to find the ratio based in the molar masses.

42 / 14.02

= 2.99

≅ 3

Therefore, the ratio is 3, the molecular formula is C₃H₆.

Thus, option D is correct.

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Hess's law gave the net change in enthalpy.  According to the law, the enthalpy of the reaction is the addition of the enthalpies of the intermediate reaction. Thus, option B is accurate.

Hess's law or the law of constant heat summation is the measure of the heat or the enthalpy of the chemical reaction. It was given by the chemist, Germain Hess.

The law states that the enthalpy of the chemical reaction is the sum of the enthalpies involved in the reactants and the products of the reaction. It is independent of the steps involved in the reaction.

Therefore, option B. enthalpy of reaction is the summation of the enthalpy of the intermediates.

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Answer:

A cation that has a smaller radius than the atom.

Explanation: when electrons are removed from the outermost shell of a calcium atom, the atom becomes a cation that has a smaller radius than the atom.

When electrons are removed from the outermost shell of a calcium atom, the atom becomes  a cation that has a smaller radius than the atom. Therefore, the correct option is option D.

Atom, the smallest unit of matter that may be separated without releasing electrically charged particles. It is also the smallest unit of matter with the characteristics of a chemical element. As a result, the atom is indeed the fundamental building component of chemistry.

The majority of the atom comprises empty space. The rest of the structure is made up of a positive-charged nucleus of neutrons and protons surrounding by a cloud of electrons with negative charges. In comparison to electrons, the lightest energized particles in nature, the nuclei is small and dense. When electrons are removed from the outermost shell of a calcium atom, the atom becomes  a cation that has a smaller radius than the atom.

Therefore, the correct option is option D.

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The Nernst equation connects the standard cell potential to the effective concentrations (activities) of the reaction's constituent parts. Br2 is a nonpolar covalent substance. Ionic substances include CsBr, NaCl, CaO, HCl, O2, KF, and HBr. Polar substances include HBr.

With this designation, the phrase's original definition—"the smallest unit of a material that yet preserves the attributes of that substance"—would be fully encapsulated. An atom is a body that cannot be divided into two, and a molecule is the tiniest unit of a certain material, according to James Maxwell's definition from 1873. A molecule is a collection of two or more atoms that constitutes the smallest discernible unit into which a pure substance can be divided while retaining its chemical makeup and other physical characteristics. molecular structure illustrations.

A group of two or more atoms bound together by the attractive forces known as chemical bonds is referred to as a molecule; depending on the context, the term may or may not include ions that meet this requirement. When two or more atoms of the same or different element are joined together, they form a molecule. A molecule can be homonuclear, meaning it is made up of atoms of the same chemical element, such as oxygen (O2), or it can be heteronuclear, meaning it is made up of more than one element, such as water (H2O).

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Isotopes are atoms of the same element with the same number of protons and electrons but varying atomic weights and neutron counts. The isotopes of an element have the same chemical characteristics because they share the same number of electrons, but because of their various atomic weights, they have varied physical characteristics.

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NADPH inhibits the pentose phosphate pathway

NADPH is a product of the pentose phosphate pathway, which generates NADPH and ribose-5-phosphate.

NADPH is a coenzyme that plays a vital role in many metabolic processes, including the pentose phosphate pathway.

Therefore, it is incorrect to say that NADPH inhibits the pentose phosphate pathway. Instead, NADPH is a key participant in this pathway, where it is produced and utilized to synthesize nucleotides, amino acids, and fatty acids, and to protect cells against oxidative stress

When there is an excess of NADPH, it can inhibit the pentose phosphate pathway through feedback inhibition, thus reducing the production of NADPH. This is important to maintain a balance of NADPH and other metabolites in the cell.

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A. If there are five O₂ molecules, each O₂ molecule consists of two oxygen atoms. Therefore, the total number of oxygen atoms would be 5 × 2 = 10.

If there are eight H₂ molecules, each H₂ molecule consists of two hydrogen atoms. Therefore, the total number of hydrogen atoms would be 8 × 2 = 16.

B. For water (H₂O) to form, it requires two hydrogen atoms and one oxygen atom. Since there are only 10 oxygen atoms available, the maximum number of water molecules that can form is limited by the number of oxygen atoms. Therefore, the maximum number of water molecules that can form is 10/1 = 10.

C. After the reaction, if all the available oxygen atoms react with hydrogen atoms to form water molecules, there will be no oxygen or hydrogen left over.

D. Since there are 10 oxygen atoms available and only 8 hydrogen atoms, the hydrogen is the limiting reactant. This means that the reaction will stop once all the hydrogen is consumed, and there will be some excess oxygen atoms remaining.

E. As an AI text-based model, I'm unable to perform real-time simulations or reactions. Therefore, I cannot provide information on what happens after the reaction completes.

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Answer:

A

Explanation:

1mole=22.4L

(22.4/1mole)×5.24

=117,376L

Explanation:

To calculate the volume of the container that the gas is in, we can use the ideal gas law, which is given by the equation:

PV = nRT

where:

P = pressure of the gas (in atm)

V = volume of the gas (in liters)

n = amount of gas in moles

R = ideal gas constant (0.0821 L·atm/(mol·K))

T = temperature of the gas (in Kelvin)

First, we need to convert the given temperature from Celsius to Kelvin by adding 273.15 to it:

T = 62°C + 273.15 = 335.15 K

Now we can plug in the given values into the ideal gas law equation and solve for V:

P = 9 atm

n = 8.3 moles

R = 0.0821 L·atm/(mol·K)

T = 335.15 K

PV = nRT

9 V = 8.3 * 0.0821 * 335.15

V = (8.3 * 0.0821 * 335.15) / 9

V ≈ 26.79 liters

So, the volume of the container that the gas is in is approximately 26.79 liters.

Answer:

J. All of these

Explanation:

I hope it helps.

I think it would be "all of the above" because all the things the wild hogs do are impacting all of the answers stated there.

hope that helped!!

Answer:

-96.6°C

Explanation:

Given:

        mass CCl4 = 530.0 g * (1 kg / 1000)

        mass CCl4 = 0.5300 kg

First calculate the molality (m) of the solute, which is the moles of solute divided by the kg of solvent (\(\frac{moles}{kg}\)):

molality CHCl3 = (mass moles CHCl3) / (mass CCl4 in kg)

molality CHCl3 = (1.31 mol) / (0.5300 kg)

molality CHCl3 = 2.471698m

Decrease in freezing point of solvent = (Kf) * (molality of solute)

Decrease in freezing point of CCl4 = (Kf) * (molality CHCl3)

Decrease in freezing point of CCl4 = (29.8°C/m) * (2.47m)

Decrease in freezing point of CCl4 = 73.6566°C

Then use the molality of the solute to calculate the change in freezing point and subtract the change from the original freezing point.

Freezing point of solution =

(freezing point of pure solvent) - (Decrease in freezing point)

Freezing point of solution = (-22.9°C) - (73.66°C)

Freezing point of solution = -96.6°C

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Answer:

Food mass is stored as mass, and then transformed into energy

Explanation:

When we eat food, the mass of food undergoes the digestion process and is being converted to various molecules in the body. For instance carbohydrate foods are broken down into glucose which is now stored in the body as glycogen.

When energy is required in the body, this glycogen is broken down into glucose again and mass is converted to energy required to do work in the body.

Explanation:

Divide the distance between the nuclei of the atoms by two if the bond is covalent

The answer of the calculations above in scientific notation are a=8.3 ×10³, b= 3.9 × 10^¹um, c= 1.4 × 10³gmol, d= 5.6× 10²km

In calculation of various expressions, the results can be expressed in a scientific notation which is a way to compress cumbersome figures.

4.2 × 104 = 436.8

7.9 × 10³ = 7900

436.8 + 7900 = 8,336.8

The scientific notation= 8.3 ×10³kg

5.23 x 106 um = 554.38um

554.38 × 7.1 = 3,936.1

3,936.1 × 10^-²

3.9 × 10³ × 10^-²= 3.9 × 10^¹um

The scientific notation= 3.9 × 10^¹um

5.44 x 107 g = 582.08g

8.1 x 104 mol = 842.4 mol

582.08g+ 842.4 mol = 1,424.48

The scientific notation = 1.4 × 10³gmol

8.40 x 105 km = 882km

3.1 × 105 = 325.5km

882km - 325.5km = 556.5

The scientific notation = 5.6× 10²km

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The temperature in the Kelvin will the helium has when the pressure reaches of 2.00 atm, is 491 K.

The ideal gas equation is as :

P V = n R T

Where,

The pressure = P

The volume = V

The moles = n

The gas constant = R

The temperature = T

The pressure and the temperature relation is as :

P₁ / T₁ = P₂ / T₂

T₂ =  P₂ T₁ / P₁

Where,

The pressure,  P₁ = 1.20 atm

The temperature, T₁ = 295 K

The pressure, P₂ = 2 atm

The temperature, T₂ = ?

The final temperature is as :

T₂ =  P₂ T₁ / P₁

T₂ = ( 2 × 295 ) / 1.20

T₂ = 491 K

The final temperature is 491 K.

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Adding heat to a system can encourage or increases a chemical reaction.

Increasing the temperature of a process, increase occurs in the average speed of the reactant molecules and we know that when more molecules move faster, the more number of molecules reacts with other molecules which results in faster formation of products.

In conclusion, adding heat is the right option.

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The movement of the ocean and sea waves in a direction is called the ocean currents. Ocean currents can bring cold water, which cools the land and atmosphere.

Ocean currents are the movement of the oceanic waves by the influence of the gravitational forces that can affect the atmosphere and the climate of the region.

Oceanic currents are capable of carrying cold water from polar areas to the regions of the equator resulting in a cooling atmosphere over the geosphere.

Therefore, option B. oceanic currents carry colder air to the warmer regions.

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Answer:

B

Explanation:

Answer:

C: Carbon monoxide - Acidic nature

Explanation:

A) Beryllium is not soluble in water but yet it reacts with an acid and a base. Therefore, since it exhibits both basic and acidic nature, we say it is Amphoteric in nature. Thus it is correct

B)potassium super oxide has the formula KO2. It reacts with acid to form salt called potassium chloride. Thus, it is basic in nature.

C) Carbon monoxide does not react with acids or bases. Thus, it doesn't show either an acidic or basic property and we say it is a neutral oxide. This option is incorrect

D) Bismuth oxide is a basic oxide because it displays properties of a base. This options is correct

An isochron represents the age of a rock, given the composition of minerals. In geochronology, isochron dating is a technique used to determine the age of rocks or geological samples.

Isochron dating relies on analyzing the ratios of isotopes within the minerals present in the rock. Isotopes are variants of an element with different numbers of neutrons in their atomic nuclei. By measuring the isotopic ratios, specifically the parent and daughter isotopes, scientists can calculate the time elapsed since certain geological events, such as the crystallization of the rock or a metamorphic event.

The isochron method involves plotting the isotopic ratios on a graph, typically using a set of minerals from the same rock sample. If the minerals formed at the same time, the data points will fall along a straight line known as an isochron. The slope of the isochron line provides the age of the rock, while the intercept with the y-axis indicates the initial isotopic composition. This technique helps to overcome challenges such as the presence of inherited isotopes or disturbances in the isotopic system, providing a reliable estimate of the rock's age.

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Answer:

Explanation:

The pressure required can be found by using the formula for Boyle's law which is

\(P_1V_1 = P_2V_2\)

Since we are finding the required pressure

\(P_2 = \frac{P_1V_1}{V_2} \\\)

From the question we have

\(P_2 = \frac{6 \times 1200}{200} = \frac{7200}{200} = \frac{72}{2} \\ \)

We have the final answer as

Hope this helps you

The value of ΔG at 298 K for a reaction mixture containing 1.9 atm N2, 1.6 atm H2, and 0.65 atm, the answer is (a) -3.86 × 10^3.

NH3 can be calculated using the equation:

ΔG = ΔG° + RT ln(Q)

where ΔG is the standard Gibbs free energy change, ΔG° is the standard Gibbs free energy change at standard conditions, R is the gas constant, T is the temperature in Kelvin, and Q is the reaction quotient.

In this case, we are given ΔG° as -33.3 kJ/mol. To calculate Q, we need to use the partial pressures of the gases in the reaction mixture. The reaction stoichiometry tells us that the ratio of the partial pressures of N2, H2, and NH3 is 1:3:2. Therefore, we can write:

Q = (P(NH3))^2 / (P(N2) * P(H2)^3)

Plugging in the given values of P(N2) = 1.9 atm, P(H2) = 1.6 atm, and P(NH3) = 0.65 atm, we can calculate Q. Then, using the value of R = 8.314 J/(mol·K) and the temperature T = 298 K, we can substitute these values into the equation and solve for ΔG.

The calculated value of ΔG at 298 K for the given reaction mixture is approximately -3.86 × 10^3 J/mol. This value is equivalent to -3.86 kJ/mol. Therefore, the answer is (a) -3.86 × 10^3.

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Answer:

Ca

Explanation:

Ca is larger than Ca2+ because, in the periodic table, the atomic radius increases from top to bottom and from left to right. Also Ca has 2 more electrons than Ca2+ therefore, its atom is bigger because it has an extra shell.

Ca²⁺ is smaller than Ca. As Ca²⁺  has lost two electrons to become positively charged.

Ca²⁺ is the calcium ion, which has lost two electrons to become positively charged. When an atom loses electrons, it becomes smaller because there are fewer negatively charged electrons in the electron cloud to balance the positive charge of the nucleus.

On the other hand, Ca refers to the neutral calcium atom, which has an equal number of protons and electrons. In comparison to Ca²⁺, the neutral calcium atom has two additional electrons, which increases the electron cloud and overall size of the atom.

Therefore, Ca²⁺ is smaller than Ca.

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Answer:

A. The mass of reactants is the same as the mass of products

Two factors determine how strong the coulombic attraction is: the dimensions of an atom. the atom's overall charge.

Why do smaller ions coulombically attract water more strongly than larger ions?

using the law of Coulomb. The water molecules find it more difficult to separate the ions from one another the smaller the ions are and the closer together they are. The more charged the ions are, the more difficult it is for the water to also remove them.

How does the size of an atom change due to coulombic attraction?

The atomic radius will shrink when the valence electrons are drawn in closer to the nucleus due to a higher force of attraction between the nucleus and the valence electrons.

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Answer:

2.3 atm

Explanation:

-7.50°C = 265.5 K

38°C = 315 K

(2.72)(265.5)=(pressure)(315)

pressure = 2.3 atm