How many carbon atoms are in 6 molecules of carbon dioxide?

Answer:

d.) granulated

Because the granulated sugar has a greater surface area.

Answer:

the answer would be 9,448.8

The mass of 9.3 × 10¹⁶ lead atoms is equal to 0.032 mg.

Avogadro’s number represents the number of entities in one mole of any substance. Generally, these units can be molecules, atoms, ions, electrons, or protons, depending upon the type of chemical reaction or reactant and product.

The value of Avogadro’s constant is approximately equal to 6.022 × 10²³ mol⁻¹.

Given, the number of atoms of the lead =  9.3 × 10¹⁶

The atomic mass of the lead = 207.2 g/mol

So 6.022 × 10²³ atoms of lead have mass = 207.2g

Then 9.3 × 10¹⁶ lead atoms will have mass \(=\frac{207.2\times 9.3\times 10^{23}}{ 6.022\times 10^{23}}\)  = 31.998 ×10⁻⁷g

As we know, 1 gram = 1000 mg

The mass of the  9.3 × 10¹⁶ lead atoms =  31.998 ×10⁻⁴ mg = 0.0032 mg

Therefore, the mass of 9.3 × 10¹⁶ lead atoms is  0.032 mg.

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Given :

Concentration of NaCl , \(c=0.85 \%\) .

To Find :

Th amount of solid NaCl must be weighed out on the balance to prepare a bottle full containing 3500 ml .

Solution :

Concentration of NaCl is 0.85 % .

It means , 0.85 gm of NaCl in 100 ml of water .

So , amount of solid NaCl required to prepare 3500 ml solution is :

\(x=\dfrac{3500\times 0.85}{100}\ gm\\\\x=29.75\ gm\)

Therefore , amount of solid NaCl required is 29.75 gm .

Hence , this is the required solution .

To balance the equation and identify the type of reaction, let's start by assigning coefficients to each compound: 2H2O + 1SO3 -> 1H2SO4

To balance the equation, we need to ensure that the number of atoms on both sides is the same. Here, we have two hydrogen (H) atoms on the left side and two on the right side, so hydrogen is already balanced.

We have two oxygen (O) atoms on the left side and four on the right side, so we need to balance oxygen by adding a coefficient of 2 in front of the water molecule:

2H2O + 1SO3 -> 1H2SO4

Now the equation is balanced with two hydrogen, four oxygen, and one sulfur (S) atom on both sides.

The type of reaction represented by this equation is a combination or synthesis reaction. In a combination reaction, two or more substances combine to form a new compound. In this case, water (H2O) and sulfur trioxide (SO3) combine to form sulfuric acid (H2SO4).

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Answer:

\(M_{KOH}=0.3704M\)

Explanation:

Hello there!

In this case, since the titration of bases when using monoprotic acids like KHP, occurs in a 1:1 mole ratio, it is possible to use the following equation, because at the endpoint the moles of the KHP and KOH get equal:

\(n_{KHP}=n_{KOH}\)

In such a way, we first calculate the moles of KOH given the mass and molar mass of KHP:

\(n_{KHP}=n_{KOH}=3.458g*\frac{1mol}{204.22g}=0.0169mol\)

Next, since we have the volume of KOH, we first take it to liters (0.04571 L) to that we obtain the following concentration:

\(M_{KOH}=\frac{0.0169mol}{0.04571L}\\\\M_{KOH}=0.3704M\)

Regards!

Answer:

I believe it's 5.0 g of hydrogen

Explanation:

Sorry if i'm wrong

Explanation:

Its molecular weight is 194.19 g/mol and  Empirical formula is C4H5N2O.

An example of heterogeneous equilibrium is:

Heterogeneous equilibrium refers to an equilibrium state in a chemical reaction where the reactants and products exist in different physical states or phases. It occurs when substances in different phases, such as solids, liquids, and gases, are involved in a chemical reaction.

Considering the given equations:

The equation I: FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g) represents a heterogeneous equilibrium.

This is because the reactants and products involve different phases (solid and gas). FeO is a solid (s), CO is a gas (g), Fe is a solid (s), and CO₂ is a gas (g). The reaction involves the conversion of a solid and a gas to another solid and a gas, and the equilibrium is established between these different phases.

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Answer:

Explanation:

Discussion

When Pressure increases  equilibrium shifts to the side with the smallest number of moles. But which side is that?

N2(g) + 3H2(g) ⇌ 2NH3(g)

The left side has 1 mol of nitrogen (N2) and 3 moles of Hydrogen = 4 mols

on the left side.

The right side has 2 mols of NH3 = 2 mols on the right.

Conclusion: You tell the number of mols by the Balance numbers to the left of each chemical in an equation.

Since the left side N2 + 3H2 = 4 mols, the equilibrium does NOT shift left.

2NH3 is only two mols.

The equilibrium shifts Right

Answer

D

Answer:

Neutrons - 5

Protons - 4

Electrons - 4

Explanation:

Beryllium (Be) is the 4th element on the Periodic Table.

It has 4 protons and 4 electrons (neutral charge)

Atomic Mass = # of Protons + # of Neutrons

9 = 4 + x

x = 5 Neutrons

Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

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Answer:

Reeling is the only process not listed.

The correct answer is option D: Reeling​.

Wool is obtained from sheep. The wool so obtained is processed according to the following flow chart;

Shearing → Scouring → Sorting → Dyeing → Straightening, Rolling and Combing

Shearing is the removal of the fleece and thin skin of the sheep. Scouring is the process of washing the hair to remove grease, dust, and dirt. Sorting is the process of differentiating the fibers.

Hence, reeling is not a process in wool extraction.

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If a fire starts in a beaker, the best option among the options provided to extinguish the fire is to cover the mouth of the beaker with a watch glass, hence the correct answer is the last option given.

For safety precautions and methods to be taken in a laboratory during any experiment or research is very important. Hence there are several ways safety hazards can be prevented or stopped.

For major fire hazards, security must be called to put out the fire in all scenarios. While for minor fires as like fire in a beaker, the hazard can be overcome by several easy cautious steps.

If we pour water in the beaker to stop the fire, that may cause the fire to be enhanced rather to be dissuaded, as if in presence of a reactive fuel, like magnesium (which could have been the cause of fire), the oxygen present in the water can cause combustion thus increasing the hazard. Hence first option is ruled out.

If we wait for the fire to go out on it's own, there are chances that the fire may come in contact with any inflammable item nearby which can enhance the fire further adding to the problem. Thus, this option is ruled out too.

Covering the fire with a rug is also not an efficient way to put out a fire in a beaker as a rug generally is very inflammable, and hence it would catch on fire easily, causing more difficult situations rather than a solution.

If we cover the mouth of the beaker with a watch glass, the fire would eventually go out as all the oxygen present in the beaker gets used for combustion. Covering the mouth of the beaker prevents any oxygen from outside to enter inside the beaker. Thus, this is a better option for the solution to the situation. Thus the answer to the question is the last option.

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The type of compound represented by the graph at right is a strong acid (option B).

An acid is generally any compound capable of dissociating into its respective constituent ions when in an aqueous solution.

An acid is categorised as strong or weak depending on whether it can dissociate completely or partially. A strong acid dissociates completely in water.

According to this question, HA, when added to water, dissociates into H+ and A- ions, hence, is a strong acid.

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The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 4 g

volume = 2 cm³

We have

\(density = \frac{4}{2} \\ \)

We have the final answer as

Hope this helps you

Answer:

1.75 moles

Explanation:

According to CaC₂(s) + 2 H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)

2 moles of H20 will produce 1 mole of Ca(OH)2

therefore 3.5 moles of H2O will produce 3.5 x (1/2) = 1.75 moles of Ca(OH)2

suppose of lead(ii) nitrate is dissolved in of a aqueous solution of ammonium sulfate. the final molarity of nitrate anion in the solution is 0.04569 M

Given weight of lead(II) nitrate=2.27 g and molar mass =331.2 g/mol, Moles of lead(II) nitrate Pb(NO3)2 =2.27 g/331.2 g/mol=6.8538x10-3 moles. 1 mole of  Pb(NO3)2 gives 1 mole of Pb+2 and 2 moles of NO3-. So moles of NO3- =2x moles of  Pb(NO3)2=2x6.8538x10-3 moles=0.0137 moles. 0.0137 moles of nitrate anion is dissolved in 30mL (0.3L) of 52.0 mM aqueous solution of ammonium sulfate. Because the total moles of nitrate anion are the same after making solution with ammonium sulphate, the moles of nitrate anion will not change after mixing. So nitrate anion molarity=moles of nitrate/volume=0.0137 moles/0.3 L=0.04569 M. The amount of the sample in a given volume of solution is measured in molarity (M). Molarity is defined as the number of moles of a solute in one litre of solution. A solution's molarity is also known as its molar concentration. Molarity (M) is the most commonly used unit of solution concentration and is defined as the number of solute in molarity multiplied by the volume of solution in litres: M is the mole of solute per litre of solution. A 1.00 molar solution (written 1.00 M) contains 1.00 molarity of solute per litre of solution.

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When the pressure is doubled and the temperature increases to 500 K, the volume of the fluorine gas is approximately 497 mL.

To determine the volume of fluorine gas when the pressure is doubled and the temperature increases, we can use the combined gas law. The combined gas law equation relates the initial and final states of a gas under different conditions. It can be written as:

(P1 × V1) / (T1) = (P2 × V2) / (T2)

Given:

P1 = 2 atm

V1 = 410 mL

T1 = 206 K

P2 = 2 atm × 2 = 4 atm (pressure is doubled)

T2 = 500 K (temperature increases)

We need to find V2, the final volume.

Substituting the given values into the combined gas law equation, we have:

(2 atm × 410 mL) / (206 K) = (4 atm × V2) / (500 K)

Cross-multiplying and simplifying the equation, we get:

(2 atm × 410 mL × 500 K) = (4 atm × V2 × 206 K)

Now, we can solve for V2:

V2 = (2 atm × 410 mL × 500 K) / (4 atm × 206 K)

V2 ≈ 497 mL

Therefore, when the pressure is doubled and the temperature increases to 500 K, the volume of the fluorine gas is approximately 497 mL.

It's important to note that we assumed the gas behaves ideally and followed the combined gas law equation. In reality, deviations from ideal gas behavior can occur at high pressures or low temperatures, so the calculated value is an approximation based on the ideal gas law..

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Answer:

First, the direct method requires recording the total mass of solution, and then evaporating off the solvent. The solid left behind is the solute, which is then weighed and used to calculate mass percent. Density can also be used to determine the mass percent of an unknown concentration.

in my opinion:)

Answer:

acid base reaction cuz no is base and h2o is none and hno3

Answer:

\(\boxed {\tt Oxygen \ and \ glucose}\)

Explanation:

The photosynthesis equation is:

energy+6CO₂+6H₂O--> C₆H₁₂O₆+6O₂

The reactants are light energy, carbon dioxide, and water. The products are glucose and oxygen.

The products of photosynthesis become the products of the light-independent reaction called cellular respiration, which creates useable energy. Therefore, the correct answer is oxygen and glucose.

The "x is small" approximation is used when the equilibrium constant (K) is small and the initial concentration of the reactant A is relatively large.

This is because when K is small, the equilibrium concentrations of the products B and C are much smaller than the initial concentration of A. Therefore, the change in the concentration of A is small compared to its initial concentration, and we can assume that the equilibrium concentration of A is approximately equal to its initial concentration minus x, where x is small.

In the given options, K = 1.0 × 10-5 for both option 2 and option 4. However, the initial concentration of A is higher in option 2 (0.250 M) compared to option 4 (0.00250 M).

Therefore, the "x is small" approximation is most likely to apply for option 2, where the initial concentration of A is relatively large.

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Answer:

Propionic acid

Explanation:

Step 1: Write the generic neutralization reaction

HA + NaOH ⇒ NaA + H₂O

Step 2: Calculate the reacting moles of NaOH

21.85 mL of 0.1062 M NaOH react.

0.02185 L × (0.1062 mol/L) = 2.320 × 10⁻³ mol

Step 3: Calculate the reacting moles of HA

The molar ratio of HA to NaOH is 1:1. The moles of HA are 1/1 × 2.320 × 10⁻³ mol = 2.320 × 10⁻³ mol.

Step 4: Calculate the molar mass of HA

0.1719 g of HA correspond to 2.320 × 10⁻³ moles.

MM = 0.1719 g/2.320 × 10⁻³ mol = 74.09 g/mol

With this molar mass, the most likely acid is propionic acid.

Answer:

Hydrates! :D

Explanation:

A liquid substance that could be used in the laboratory for dissolving dry mortar on floor tiles is vinegar; (i) removing KMnO₄, stains is sodium metabisulfite solution; drying acid anhydrides is concentrated sulfuric acid.

Solvents are substances usually liquids, but may also be gases or solids that dissolve other substances known as solutes.

Solvents are usually used as cleansing agents.

One possible liquid substance that could be used for dissolving dry mortar on floor tiles is a mild acid solution, such as diluted hydrochloric acid or vinegar.

KMnO₄ stains are often difficult to remove, but one substance that can be used is sodium metabisulfite (Na₂S₂O₅) solution. Sodium metabisulfite acts as a reducing agent and can effectively neutralize and remove KMnO₄ stains.

Concentrated sulfuric acid is commonly used in the laboratory as a drying agent. It has a strong affinity for water and can efficiently absorb moisture, including water present in acid anhydrides.

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Answer:

its D

Explanation:

Answer:

D

Explanation:

Answer:

Mass of liquid: 20.421g

Density= 1.0109405940594 g/mL

Explanation:

Mass of liquid

To find mass of liquid you take the mass of beaker + liquid (171.223g) and subtract it from the Mass of beaker (beaker without the water). The difference is the answer.

171.223g - 150.802g = 20.421g

Density

To find density you use the formula Mass/Volume. Take the Volume given, and the mass of the liquid you just found.

20.421mL/20.421g = 1.0109405940594 g/mL

1. The name of the compound is 2-ethyl-1-butene

2. The name of the compouund is 1-chloro-1-propene

3. The name of the compouund is trans-2,3-dibromo-2-pentene

The IUPAC name of the compound can be obtained by doing the following:

With the above information, the name of the compound is 2-ethyl-1-butene

The IUPAC name of the compound can be obtained by doing the following:

With the above information, the name of the compound is 1-chloro-1-propene

The IUPAC name of the compound can be obtained by doing the following:

With the above information, the name of the compound is trans-2,3-dibromo-2-pentene

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