The human heart is an organ that pumps blood throughout the body supplying oxygen, nutrients, blood, and hormones to the tissue. What does it remove FROM the tissues?
O hydrogen dioxide
O lime water
O carbon monoxide
O carbon dioxide

The greatest electron affinity will be "Ar".

The quantity of energy produced when an electron must be coupled to a neutral atom as well as a molecule in the gaseous state to create an anion has been known as the electron affinity of an atom and molecule.

In the periodic table, electron affinity typically increases over a period although occasionally declines within a group. The generally increased nuclear charge up a group throughout a period provides the chemical explanation for differences in electron affinities across the periodic table.

Therefore, Ar will have a higher electron affinity.

So the correct answer will be option (D)

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Answer:

the answer is D.

Explanation:

your welcome :)

Answer: D). No Charge

Explanation: The neutrons within the nucleus of an atom have no charge.

Answer:

= 3.456 × 1011

Explanation:

To prepare 70 mL of zinc sulfate eyedrops APF, you would need the following ingredients:

Zinc sulfate monohydrate: 0.07 g

Chlorobutol aqueous solution: 10.45 mL

Boric acid powder: 0.7 g

Glycol aqueous solution: 0.14 mL

To calculate the amount of each ingredient needed to prepare 70 mL of zinc sulfate eye drops APF, we'll follow these steps:

Step 1: Determine the concentration of zinc sulfate needed. Since the recipe doesn't specify the concentration, we'll assume a standard concentration of 0.1% w/v.

Step 2: Calculate the amount of zinc sulfate required. The desired concentration is 0.1% w/v, and we need to prepare 70 mL of the eye drops. Therefore, the amount of zinc sulfate needed can be calculated as follows:

Amount of zinc sulfate (g) = (Desired concentration (g/100 mL) * Volume (mL))/100

                       = (0.1 * 70)/100

                       = 0.07 g

Step 3: Determine the amounts of other ingredients based on the provided ratios. The chlorobutol solution is at a concentration of 0.67% w/v, so we need to calculate the volume required using the ratio:

Volume of chlorobutol solution (mL) = (Amount of zinc sulfate (g) * 100)/Concentration of chlorobutol (%)

                                  = (0.07 * 100)/0.67

                                  = 10.45 mL

The boric acid powder doesn't specify the concentration, so we'll assume it to be 1% w/v. Using the same logic, we can calculate the amount of boric acid powder required:

Amount of boric acid powder (g) = (Desired concentration (g/100 mL) * Volume (mL))/100

                             = (1 * 70)/100

                             = 0.7 g

Finally, the glycol solution is at a concentration of 50% w/v, so the volume required can be calculated as:

Volume of glycol solution (mL) = (Amount of zinc sulfate (g) * 100)/Concentration of glycol (%)

                            = (0.07 * 100)/50

                            = 0.14 mL

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Answer:

Neutrons and protons

Explanation:

The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotope).

840 moles of chlorine in 12 moles.

What in chemistry is a mole?

The unit of measurement used by chemists known as a mole is very significant. Similar to how having a dozen eggs says you have twelve eggs, having a mole of something indicates that you have 602,214,076,000,000,000,000,000 of that particular thing.

                               When measuring very small objects like atoms, molecules, or other particles, chemists must use moles. 6.02214 x 1023 particles make up a mole, which is equal to (10) of material. 6.02214 1023 particles make up one mole.

1 mole of chlorine weighs 70 grams.

    12.00 moles of chlorine = 12 * 70

                                            = 840

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The complete question is -

How many grams are in 12.00 moles of chlorine (gas)?

Answer:

your answer should be the bottom

sorry if im wrong

Explanation:

Answer:

IT’S D)molecule of diatomic nitrogen

Explanation:

Thx to the person above though..........

Answer:

D

Explanation:

The name of the salt tells us that:

a) there is just one other element combined with the metal by looking at the suffix of the salt's name.

b) the presence of oxygen in a salt can be indicated by the name of the salt.

a) The name of a salt can tell us that there is just one other element combined with the metal by looking at the suffix of the salt's name. If the salt name ends in "-ide," it indicates that the salt is composed of a metal and a single non-metal element.
For example, sodium chloride (NaCl) and potassium bromide (KBr) are salts where the metal (sodium and potassium) is combined with a single non-metal element (chlorine and bromine, respectively). The "-ide" suffix suggests the presence of only one other element in the salt.

b) The presence of oxygen in a salt can be indicated by the name of the salt. If the salt name includes the element oxygen, it suggests that oxygen is present in the salt compound.
For example, sodium carbonate (Na₂CO₃) and calcium sulfate (CaSO₄) contain the element oxygen in their chemical formulas. The presence of oxygen in the salt is implied by the name and the combination of elements in the compound.

Therefore, the name of salt tells us that there is just one other element combined with the metal and there is oxygen present in the salt

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Answer:

8

Explanation:

\(\huge\pink{Answer}\)

0.0006 in scientific notation is 6 × 10-4

All numbers in scientific notation or standard form are written in the form

m × 10n, where m is a number between 1 and 10 ( 1 ≤ |m| < 10 ) and the exponent n is a positive or negative integer.

To convert 0.0006 into scientific notation, follow these steps:

Move the decimal 4 times to right in the number so that the resulting number, m = 6, is greater than or equal to 1 but less than 10

Since we moved the decimal to the right the exponent n is negative

n = -4

Write in the scientific notation form m × 10n

= 6 × 10-4

Therefore,

6 × 10-4 is the scientific notation form of 0.0006 number and 6e-4 is the scientific e-notation form for 0.0006

Answer:

1) Organic chemistry is the study of the structure, properties, composition, reactions, and preparation of carbon-containing compounds.

2) the branch of chemistry that deals with carbon compounds (other than simple salts such as carbonates, oxides, and carbides).

Explanation:

I gave 2 examples

The question is incomplete, the complete question is;

An unknown compound has the following chemical formula:  

N2Ox  

where x stands for a whole number.  

Measurements also show that a certain sample of the unknown compound contains 3.7 mol of oxygen and 2.45 mol of nitrogen.  

Write the complete chemical formula for the unknown compound.

Answer:

The complete formula of the compound is N2O3.

Explanation:

Given;

Number of moles of N = 2.45 moles

Number of moles of O = 3.7 moles

Chemical formula of unknown compound = N2Ox

From the ratio of the number of moles of N to O;

2/x = 2.45/3.7

2 * 3.7 = x * 2.45

x = 2 * 3.7/ 2.45

x =3

Hence the complete formula of the compound is N2O3.

Answer:

nucleus

Explanation:

It is an electron

Answer:

48.8%

Explanation:

The reaction has a 1:1 mole ratio so;

Number of moles of benzoic acid reacted = mass/molar mass = 3.8 g/122.12 g/mol = 0.03 moles

So;

0.03 moles of methyl benzoate is formed in the reaction

Mass of methyl benzoate formed = 0.03 moles * 136.15 g/mol = 4.1 g

percent yield = actual yield/theoretical yield * 100/1

percent yield = 2.0 g/4.1 g * 100 = 48.8%

Answer:

The moles of H2 is 230-two hundred and thirty

Answer:

Explanation:

a piano white

The best instrument used to magnify small objects up to 20 times is a  compound microscope. Therefore, option B is correct.

The optical microscope, also known as a light microscope, creates enlarged pictures of tiny objects by using visible light and a set of lenses.

Viewing tiny samples that are invisible to the human eye is done with compound microscopes. Normally, a slide with these samples on it is used in a microscope. When utilizing a stereo microscope, bigger items like rocks or flowers may fit beneath the microscope with greater room, and slides are not necessary.

Because it has two different types of lenses that work together to magnify an item, the conventional light microscope used in laboratories is referred to as a compound microscope.

Thus, option B is correct.

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Answer:

Ksp = 4x³

Explanation:

Step 1: Write the reaction for the solution of calcium hydroxide

Ca(OH)₂(s) ⇒ Ca²⁺(aq) + 2 OH⁻(aq)

Step 2: Make an ICE chart

Let "x" be the molar solubility of calcium hydroxide.

        Ca(OH)₂(s) ⇒ Ca²⁺(aq) + 2 OH⁻(aq)

I                                 0                  0

C                              +x               +2x

E                                x                 2x

Step 3: Write the expression for the solubility product constant (Ksp)

The solubility product constant is equal to the product of the concentrations of the products raised to their stoichiometric coefficients.

Ksp = [Ca²⁺] × [OH⁻]² = x × (2x²) = x × 4x² = 4x³

if \(x\) represents the molar solubility of  calcium hydroxide then  correct equation for the Ksp is \(\bold {x^3}\)

Solubility product constant Ksp:

It is the equilibrium constant for a solid substance that are dissolved in an aqueous solution. It expresses how much a solute is dissolved in solution.

The reaction of calcium hydroxide for the solution  

\(\bold {Ca (OH )_2(s) \rightarrow Ca^2^+(aq) + 2 OH^-(aq)}\)  

1 mole of calcium hydroxide is dissociate into 1 mole of calcium ion and 2 moles of Hydroxil ion.

The Ksp equation for the solution,

\(\bold {Ksp =[Ca^2^+][ OH^-]^2}\\\)

If \(x\) represents molar solubility,

\(\bold {Ksp =[x][ x]^2 = x^3}\\\)

Therefore, if \(x\) represents the molar solubility of  calcium hydroxide then  correct equation for the Ksp is \(\bold {x^3}\)

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Answer:

No

Explanation:

i honestly don't know

Answer:

To convert joules to calories, you can use the conversion factor:

1 calorie = 4.184 joules

To find out how many calories are in 4,180 joules, divide the given value by the conversion factor:

4,180 joules / 4.184 joules per calorie = 0.9 calories (approximately)

Therefore, there are approximately 0.9 calories in 4,180 joules.

sorry what us this i don't get it

Step 1

The reaction must be written, completed, and balanced.

Fe2O3 + 3 H2 => 2 Fe + 3 H2O

The reactants: Fe2O3 and H2

------------------------

Step 2

Information provided:

The mass of Fe2O3 = 6.3 g

The mass of H2 = 15.8 g

---

Information needed:

The molar masses:

Fe2O3) 160 g/mol approx.

H2) 2.01 g/mol approx.

-----------------------

Step 3

The limiting reactant and the excess agent:

By stoichiometry,

1 mole Fe2O3 = 160 g

1 mole H2 = 2.01 g

Fe2O3 + 3 H2 => 2 Fe + 3 H2O

160 g Fe2O3 ------- 3 x 2.01 g H2

6.3 g Fe2O3 -------- X

X = 6.3 g Fe2O3 x 3 x 2.01 g H2/160 g Fe2O3 = 0.24 g

For 6.3 g Fe2O3, 0.24 g of H2 is needed, but there is 15.8 g. Therefore, the limiting reactant is Fe and the excess is the H2.

Amount of the H2 leftover:

15.8 g (provided) - 0.24 g (needed) = 15.56 g (leftover)

Mass to moles:

15.56 g x (1 mole H2/2.01 g H2) = 7.74 moles

Answer: 7.74 moles of H2 are leftover

Hess law can help us to obtain the enthalpy of a series of reactions by summation. The missing enthalpy of this reaction is −198kJ.

According to the Hess law of constant heat summation, the enthalpy of a sequence of reactions can be obtained as the sum of the enthalpies of all the reactions.

Now looking at all the reavtion written here in order to obtain the missing enthalpy, we conclude that the missing enthalpy is −198kJ.

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2SO2 (g) + O2 (g)→2SO3 (g), ΔH = −198 kJ.

Answer:

Less than 0.033 M:

\([Z]_{eq}=2.4x10^{-3}M\)

Explanation:

Hello,

In this case, the described equilibrium is:

\(2A+B\rightarrow 2Z\)

Thus, the law of mass action is:

\(K=\frac{[Z]^2}{[A]^2[B]}=0.43\)

Nevertheless, given the initial concentration of Z that is 0.033 M, we should invert the equilibrium since the reaction will move leftwards:

\(\frac{1}{K}=\frac{[A]^2[B]}{[Z]^2}=\frac{1}{0.43}=2.33\)

Know, by introducing the change \(x\) due to the reaction extent, we can write:

\(2.33=\frac{(2x)^2*x}{(0.033-2x)^2}\)

Which has the following solution:

\(x_1=2.29M\\x_2=0.0181M\\x_3=0.0153M\)

But the correct solution is \(x_3=0.0152M\) since the other solutions make the equilibrium concentration of Z negative which is not possible. In such a way, its concentration at equilibrium is:

\([Z]_{eq}=0.033M-2(0.0153M)\)

\([Z]_{eq}=2.4x10^{-3}M\)

Which is clearly less than 0.033 M since the addition of a product shift the reaction leftwards in order to reestablish equilibrium (Le Chatelier's principle).

Regards.

Answer:

The internal combustion engine in the car converts the potential chemical energy in gasoline and oxygen into thermal energy which is transformed into the mechanical energy that accelerates the vehicle (increasing its kinetic energy) by causing the pressure and performing the work on the pistons.

Answer:

A, B, and C are the correct options.

Explanation:

I just did it on Edge2023

Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

A food chain refers to the order of events in an ecosystem, where one living organisms eats another organisms and later that organism is consumed by another larger organism. It also explains the feeding pattern.

The food chain is a linear sequence of organisms where the nutrients and energy is transferred from one organism to the other. It begins with the producer and ends with decomposer.

The producers in a food chain consists of all autotrophs like phytoplankton, algae and green plants. It is the producers which utilize the energy from the sun to produce food.

Thus the correct option is B.

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Answer:

2.03 × 10⁻⁵ M

Explanation:

Step 1: Given data

Concentration of Pb(NO₃)₂: 6.73 ppm = 6.73 mg/L

Step 2: Convert 6.73 mg/L to mol/L

The molar mass of 331.2 g/mol.

6.73 × 10⁻³ g/L × 1 mol/331.2 g = 2.03 × 10⁻⁵ mol/L = 2.03 × 10⁻⁵ M

Step 3: Calculate the molar concentration of Pb²⁺

Let's consider the ionization of Pb(NO₃)₂.

Pb(NO₃)₂(aq) ⇒ Pb²⁺(aq) + 2 NO₃⁻(aq)

The molar ratio of Pb(NO₃)₂ to Pb²⁺ is 1:1. The molar concentration of Pb²⁺ is 1/1 × 2.03 × 10⁻⁵ M = 2.03 × 10⁻⁵ M.