Which of these is the BEST definition of heredity?

Answer:

Controls the movement of substances into and out of the cell.

Answer:

1) because of heating

2) because of hammering

To calculate the alveolar ventilation rate, we need to use the formula:
Alveolar ventilation rate = (tidal volume - dead space) x respiratory rate
Using the values given in the question, we can plug in the numbers:
Alveolar ventilation rate = (500 ml - 200 ml) x 15/min
Alveolar ventilation rate = 300 ml x 15/min
Alveolar ventilation rate = 4500 ml/min
Therefore, the person's alveolar ventilation rate is 4500 ml/min.

The alveolar ventilation rate (AVR) can be calculated using the tidal volume (TV), dead space, and breathing rate. In this case, the tidal volume is 500 ml, the dead space is 200 ml, and the breathing rate is 15 breaths per minute.
AVR = (TV - dead space) x breathing rate
AVR = (500 ml - 200 ml) x 15 breaths/min
AVR = 300 ml x 15 breaths/min
AVR = 4500 ml/min

So, the person's alveolar ventilation rate is 4500 ml/min.

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Answer:

3785.4g

Explanation:

210.3 mol of water are

210.3 mol × (18.0g/mol) = 3785.4g

1054.67 grams of calcium phosphate are theoretically produced if we start with 3.40 moles of ca(no3)2 and 2.40 moles of li3po4.

To determine the theoretical yield of calcium phosphate (Ca3(PO4)2) produced from 3.40 moles of Ca(NO3)2 and 2.40 moles of Li3PO4, we need to identify the limiting reactant and use stoichiometry.

First, we need to determine the moles of calcium phosphate produced from each reactant. The balanced equation for the reaction is:

3Ca(NO3)2 + 2Li3PO4 → Ca3(PO4)2 + 6LiNO3

From the equation, we can see that the molar ratio between Ca(NO3)2 and Ca3(PO4)2 is 3:1. Therefore, the moles of calcium phosphate produced from Ca(NO3)2 would be 3.40 moles.

Similarly, the molar ratio between Li3PO4 and Ca3(PO4)2 is 2:1. Therefore, the moles of calcium phosphate produced from Li3PO4 would be 2.40/2 = 1.20 moles.

Since the moles of calcium phosphate produced from Ca(NO3)2 (3.40 moles) are higher than those produced from Li3PO4 (1.20 moles), Ca(NO3)2 is the limiting reactant.

To calculate the mass of calcium phosphate, we can use the molar mass of Ca3(PO4)2, which is approximately 310.18 g/mol.

Mass of calcium phosphate = Moles of calcium phosphate × Molar mass

Mass of calcium phosphate = 3.40 moles × 310.18 g/mol

Mass of calcium phosphate ≈ 1054.67 grams

Therefore, theoretically, approximately 1054.67 grams of calcium phosphate would be produced when starting with 3.40 moles of Ca(NO3)2 and 2.40 moles of Li3PO4.

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Answer:

(ANSWER CHOICES ORDER MAY BE DIFFERENT FROM YOURS!!)

 A.  

The pollen from one flower is transported by an insect to the ovule of another flower.

 B.  

A potato plant produces a tuber, and the next year, a new plant grows from the tuber.

C.  

Part of the stem segment of a cactus plant falls off and begins to form a new plant.

D.  

A new shoot emerges from a strawberry plant and produces another plant.

Explanation:

It's "The pollen from one flower is transported by an insect to the ovule of another flower. " because i got it from study island

There are 0.067 moles and 36.03 grams of carbon present in 12.16 g of aspirin.

mass of aspirin, C3H804 = 12.16 g

Now, we have to calculate the number of moles and grams of carbon present in this aspirin. Calculating number of moles of C3H804

Number of moles = mass of the substance / molar mass of the substance

The molar mass of C3H804= (3 x atomic mass of C) + (8 x atomic mass of H) + (4 x atomic mass of O)

The atomic mass of carbon (C) is 12.01 g.

The atomic mass of hydrogen (H) is 1.008 g.

The atomic mass of oxygen (O) is 16 g.

So, molar mass of C3H804 = (3 x 12.01 g) + (8 x 1.008 g) + (4 x 16 g)= 180.16 g/mol

So, number of moles of aspirin C3H804 = 12.16 g / 180.16 g/mol= 0.067 moles of aspirin

Calculating grams of carbon in C3H804.

As per the molecular formula of aspirin, C3H804 contains three atoms of carbon. The molar mass of carbon (C) is 12.01 g. So, mass of carbon in C3H804 = 3 x 12.01 g= 36.03 g.

Therefore, there are 0.067 moles and 36.03 grams of carbon present in 12.16 g of aspirin, C3H804.

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EFG = Wxy is one possible congruence statement that is equivalence to and valid for Wxy = EFG.

If one triangle can be positioned on top of the other so that they coincide, two triangles are said to be congruent (fit together). As a result, congruent triangles are precise replicas of one another and, when assembled, have sides and angles that match.

The triangles are congruent if two sides of one bmatch two sides of another triangle, and if the included angles are also congruent. Using labels: Triangle ABC is congruent to triangle DEF if in triangles ABC and DEF, AB = DE, AC = DF, and angle A = angle D.

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Answer:

no.

Explanation:

Answer:

The answer is "\(\bold{Cl_4}\)"

Explanation:

Please find the complete question in the attachment file.

In this question, it uses the Chemical equations, which is also known as the order to comply with the Law on Mass Conservation, substances must be balanced wherever volume cannot be generated or lost. This should be reacted that the reaction weight becomes equal to a product mass.

Answer:

C.) Earthquake

Explanation:

Most mountains occur due to the movement of tectonic plates. They slowly push into each other, and the earth's crust rises over time forming mountains.

Earthquakes occur due to the shift of tectonic plates. It sends seismic waves throughout the earth's crust, and causes the ground to shake temporarily.

The valence states provided are general representations and may vary depending on specific conditions and coordination environments.

a. Uvarovite: The mineral formula for uvarovite is Ca3Cr2(SiO4)3. In this formula, the valence state of calcium (Ca) is +2, the valence state of chromium (Cr) is +3, and the valence state of silicon (Si) is +4. Oxygen (O) is usually assigned a valence state of -2.

b. Azurite: The mineral formula for azurite is Cu3(CO3)2(OH)2. In this formula, the valence state of copper (Cu) is +2, carbonate (CO3) has a valence state of -2, and hydroxide (OH) has a valence state of -1.

c. Cuprite: The mineral formula for cuprite is Cu2O. In this formula, the valence state of copper (Cu) is +1, and oxygen (O) is usually assigned a valence state of -2.

d. Gypsum: The mineral formula for gypsum is CaSO4·2H2O. In this formula, the valence state of calcium (Ca) is +2, sulfur (S) has a valence state of +6, and oxygen (O) is usually assigned a valence state of -2. The water molecules (H2O) do not have a net charge.

e. Galena: The mineral formula for galena is PbS. In this formula, the valence state of lead (Pb) is +2, and sulfur (S) has a valence state of -2.

It's important to note that the valence states provided are general representations and may vary depending on specific conditions and coordination environments.

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The effective nuclear charge of sulfur is 14, and the effective nuclear charge of chlorine is 15.

Effective nuclear charge (Zeff) is a measure of the positive charge felt by the valence electrons. The effective nuclear charge (Zeff) of s and Cl is calculated using the simple formula zeff = z – s, where z is the atomic number and s is the screening constant. Screening constant (s) is the number of electrons between the nucleus and the valence electrons that shield the valence electrons from the full nuclear charge of the nucleus.

For sulfur (S), the atomic number is 16, and there are two electrons in the innermost shell and four electrons in the second shell. So, the number of valence electrons in sulfur is 6. The screening constant of S is 2. Effective nuclear charge of sulfur = z – s= 16 - 2= 14

For chlorine (Cl), the atomic number is 17, and there are two electrons in the innermost shell and eight electrons in the second shell and seven valence electrons. Therefore, the screening constant of Cl is 2. Effective nuclear charge of chlorine = z – s= 17 - 2= 15

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Answer:

see the pic for the answer

The new volume of the gas is 832.5 ml assuming the moles of gas and temperature are held constant

Since the temperature and number of moles of gas are held constant, the pressure-volume relationship of the gas follows Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

the gas in a 275.0 ml piston experiences a change in pressure from 1.00 atm to 3.10 atm.

P1V1 = P2V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.

V2 = V1 * P1 / P2

= 275.0 ml * 1.00 atm / 3.10 atm

= 832.5 ml

hence, The new volume of the gas is 832.5 ml.

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Answer:

He is a English chemist physicist and meteorologist. He is best known for the atomic theory

Answer:

John Dalton was a scientist.

Explanation:

The pKa value of (EtO)2P(O)CH2TMS is not readily available in the literature.

It is likely that the pKa of (EtO)2P(O)CH2TMS is in the range of 1-3.

However, we can make some guesses based on the structure of the compound.

(EtO)2P(O)CH2TMS contains a phosphonate group, which typically has a pKa value around 1-2.

This means that in solution, the compound will exist mostly in its deprotonated form, with the phosphonate group negatively charged.

The TMS group on the other hand is highly electron-withdrawing, which may slightly lower the pKa of the compound.

Additionally, the ethoxy (EtO) groups may also have some influence on the pKa, but to a lesser extent.

Overall, it is likely that the pKa of (EtO)2P(O)CH2TMS is in the range of 1-3, with a higher likelihood towards the lower end of the range due to the presence of the phosphonate group.

The pKa value of a compound is an important parameter that indicates its acidity. In your question, you are asking about the pKa of (EtO)2P(O)CH2TMS, where TMS stands for trimethylsilyl and EtO represents ethoxy.

This specific compound is a phosphorus-containing compound with trimethylsilyl and ethoxy functional groups.

Unfortunately, the exact pKa value for (EtO)2P(O)CH2TMS is not readily available in standard databases or literature. However, we can discuss some general trends related to acidity and pKa values for related compounds.

For phosphorus-containing compounds, pKa values usually range from 0 to 12, depending on the structure and substituents.

Compounds with electron-withdrawing groups, like TMS, often have lower pKa values due to the stabilization of the conjugate base.

On the other hand, electron-donating groups like EtO can increase the pKa value, making the compound less acidic.

Given the combination of TMS and EtO groups in (EtO)2P(O)CH2TMS, it is challenging to predict the exact pKa value without further information or experimental data. For a more accurate value, you may need to consult specialized databases, conduct experiments, or consult an expert in the field.

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250.0 ml of water must be added to 500.0 ml of a 3.00 M HCl solution to obtain a solution that is 2.00 M.

To calculate the amount of water that needs to be added to a 500.0 ml of 3.00 M HCl solution to obtain a 2.00 M solution, we can use the following formula: M₁V₁ = M₂V₂

Where: M1 = initial concentration of the HCl solution = 3.00 M

V₁ = initial volume of the HCl solution = 500.0 ml

M₂ = final concentration of the HCl solution = 2.00 M

V₂ = final volume of the HCl solution (i.e. the volume of the HCl solution after water has been added)

Solving for V₂:

M₁V₁ = M₂V₂

(3.00 M) (500.0 ml) = (2.00 M) V2

V₂ = (3.00 M x 500.0 ml) / (2.00 M)

V₂ = 750.0 ml

Therefore, the final volume of the HCl solution after water has been added is 750.0 ml. Since we started with 500.0 ml of HCl solution, we need to add:

750.0 ml - 500.0 ml

= 250.0 ml

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Answer:

c Draw Ernest Rutherford atomic model

Explanation:

Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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Answer:

\(\boxed {\boxed {\sf M \approx0.864 \ M \ HBr}}\)

Explanation:

The molarity of a solution is the moles per liter. It is found using this formula:

\(M=\frac { moles \ of \ solute}{liters \ of \ solution}\)

First we must calculate moles, since we are given grams. To convert from grams to moles, the molar mass is used. This is also given to us, it is 80.91 grams per mole. We can use it as a ratio.

\(\frac {80.91 \ g \ HBr}{1 \ mol \ HBr}\)

Multiply by the given number of grams.

\(314.5 \ g \ HBr *\frac {80.91 \ g \ HBr}{1 \ mol \ HBr}\)

Flip the fraction so the grams of HBr cancel.

\(314.5 \ g \ HBr *\frac {1 \ mol \ HBr}{80.91 \ g \ HBr}\)

\(\frac {314.5 \ mol \ HBr}{80.91 }=3.88703497714 \ mol \ HBr\)

Now we know the moles, and can calculate the molarity.

There are 3.88703497714 moles of solute and 4.50 Liters of solution.

\(M= \frac {3.88703497714 \ mol }{ 4.50 \ L}\)

\(M= 0.863785550476 \ mol/ L\)

The original measurements have 4 and 3 significant figures, so we use the lowest number of 3 for our answer. For the number we calculated, that is the thousandth place.

The 7 in the ten thousandth place tells us to round the 3 to a 4.

\(M \approx 0.864 \ mol/ L\)

\(M \approx 0.864 \ M \ HBr\)

The molarity of the solution is about 0.864 M HBr.

The percent yield of the reaction is 83.67%, which means that 83.67% of the expected amount of Baso was actually produced. This is a relatively high yield, indicating that the reaction was successful in producing the desired product.

Step 1: Calculate the theoretical yield of Baso:

Molar mass of Baso = 234.17 g/mol

Moles of Baso = (45.8 g Baso) / (234.17 g/mol) = 0.196 mol Baso

Step 2: Calculate the actual yield of Baso:

Molar mass of Baso = 234.17 g/mol

Moles of Baso = (38.4 g Baso) / (234.17 g/mol) = 0.164 mol Baso

Step 3: Calculate the percent yield:

Percent yield = (Actual yield/Theoretical yield) x 100

Percent yield = (0.164 mol Baso / 0.196 mol Baso) x 100

Percent yield = 83.67%

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Answer:

Answer:

CH4 and O2

Explanation:

The reactants of a chemical reaction are those that are on the left side of the chemical equation. In this case, methane (CH4) and oxygen (O2) which are on the left side, are the reactants.

The Lewis Structure for ClO.  is attached in the image.

Lewis structure represents the structure of atoms or molecules with their valence electron.

It is a two-dimensional model that helps us to know, how many bond pairs and a lone pair a molecule contains.

Lewis structure of ClO⁻ is very simple to draw as it has only two atoms(chlorine and oxygen), we have to just represent the valence electron around them and complete their octet.

1. Count total valence electron in ClO-

Total number of the valence electrons in chlorine = 7

Total number of the valence electrons in oxygen = 6

Total number of valence electrons  = 7 + 6 + 1 = 14 valence electrons        

[∴one oxygen atom, one chlorine, and one negative charge that count as a one valence electron]

2. Find the least electronegative atom and placed it at center

Connect outer atoms to central atom with a single bond Cl-O bond

Now count the valence electron in the above structure.

Single bond means two-electron , only one single bond is used.

Hence, only 2 valence electrons are used in the above structure from 14 total valence electrons available for drawing the lewis structure of ClO-.

(14 – 2) = 12

We have left with 12 valence electrons more.

3.   Place remaining valence electrons starting from outer atom first

So, put the valence electron around the chlorine and oxygen.

we put 6 electrons around chlorine and oxygen, as each of them already sharing 2 electrons with the help of a single bond between them.

The structure can be seen in the figure attached.

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Answer:

The interaction of H+ ions and OH- ions produces water in a neutralization reaction, which occurs when an acid and a base combine to make water and a salt.

Explanation:

An acid and a base combine to produce an ionic molecule and potentially water in a neutralization reaction.

The inventor of carbonated water, Joseph Priestley, also discovered several elements during his scientific career.

Priestley, an English chemist and natural philosopher, made significant contributions to the field of chemistry in the 18th century.

One of his notable discoveries was oxygen. In 1774, Priestley conducted experiments in which he isolated a gas that could support combustion and enhance the respiration of animals.

He named this gas "dephlogisticated air," which is now recognized as oxygen.

In addition to oxygen, Priestley also discovered other gases, including nitrous oxide (laughing gas), carbon monoxide, ammonia, sulfur dioxide, and hydrogen chloride.

His experiments and investigations into these gases helped expand the understanding of chemical elements and their properties.

Priestley's discoveries paved the way for advancements in chemistry and laid the foundation for later studies in the field.

His work not only revolutionized scientific knowledge but also had a profound impact on various industries and applications, including the development of carbonated water, which has become a popular beverage worldwide.

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Answer:

the answer is A

Explanation:

hope it hlp