what would happen if you forgot to add phenolphthalein indicator solution to the vinegar

The moles of helium that were added to the balloon are 102 mol.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Given,

Initial Volume = 2280L

Final Volume = 5701L

Final moles = 255 mol

Using the ideal gas equation, V₁/n₁ = V₂/n₂

                                         2280 / n₁ = 5710 / 255

                                     n₁ = (255 × 2280) ÷ 5710

                                           = 101.8 mol = 102 mol

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Answer:

Yall are coming after that person above me when theres no diagram!!!! HELLO????????????? crazy

Explanation:

The overall enthalpy of the reaction has been obtained by reversing the second equation, and third equation must be halved. Thus, option D and E has been correct.

The complete reactions given in the question has been:

\(\rm C\;+\;O_2\;\rightarrow\;CO_2\\2\;CO\;+\;O_2\;\rightarrow\;2\;CO_2\\2\;H_2O\rightarrow\;2\;H_2\;+\;O_2\)

The overall reaction has been:

\(\rm C\;+\;H_2O\;\rightarrow\;CO\;+\;H_2\)

To obtain the overall enthalpy of the reaction, the intermediate reaction enthalpy has been arranged to give the overall equation.

The first equation has been in the correct sequence for the final reaction.

The second equation has been in in the same order to obtain the overall reaction. The CO has been the product, while carbon dioxide has been the reactant from equation 1. Thus, equation 2 has been reversed.

The third equation has 2 moles of water while the overall reaction has 1 mole of water. Thus, equation third has been halved.

Thus, to obtain the enthalpy of overall final reaction, the second equation must be reversed, and third equation must be halved. Thus, option D and E has been correct.

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What must be done to calculate the enthalpy of reaction? Check all that apply.

The first equation must be halved.

The first equation must be reversed.

The second equation must be halved.

What is the overall enthalpy of reaction?

ΔH\(rxn\)= ✔️131.3 kJ

The amount (in pounds) the gasoline tank will hold when full is 153.76 lb

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

1 gallon = 3785.412 mL

Therefore,

25 gallon = 25 × 3785.412

25 gallon = 94635.3 mL

Mass = Density × Volume

Mass = 0.737 × 94635.3

Mass = 69746.2161 g

453.592 g = 1 lb

Therefore,

69746.2161 g = 69746.2161 / 453.592

69746.2161 g = 153.76 lb

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The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

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Answer:

A calcium ion will form a 1+ charge because it will have more protons than electrons.

Explanation:

Electrons have negative charges

Protons have positive charges

Calcium likes to lose its extra electron to achieve an octet outer shell and be "happy".

Answer: The answer is D. Plant A has more turgor pressure than plant B

Explanation:

Answer:

plant A has more turgor pressure than B

A group 12 metal that was once used in thermometers, but is now known to be poisonous is Mercury. In the past, thermometers were frequently made of the poisonous element mercury.

However, its use has been substantially phased out in many nations because to its harmful effects on health and the environment. The smallest and nearest planet to the sun in our solar system is Mercury. It makes one circuit around the sun every 88 days at a distance of around 58 million kilometres (36 million miles). Mercury has a daytime maximum temperature of 430 degrees Celsius (800 degrees Fahrenheit) and a nighttime minimum of -180 degrees Celsius (-290 degrees Fahrenheit) due to its close proximity to the sun.

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Answer:

We know that there are three astronauts and each one of them emits 500 grams of carbon dioxide each day, so the total carbon dioxide emitted each day.

Explanation:

From the mole ratio of the reaction, there is not enough sodium hydroxide in the cabin to cleanse the cabin air of the carbon

The mass of sodium hydroxide required depends on the mass of CO2 produced by the astronauts.

The mass of CO2 produced by the astronauts is calculated as follows;

Mass of CO2 produced = 3 × 2 × 500 g = 3000 g of CO2

The mass of sodium hydroxide required is calculatedfrom the eqaution of the reaction given below:

2 moles of sodium hydroxide reacts with 1 mole of CO2

Molar mass of NaOH = 40 g/mol

Molar mass of CO2 = 44 g/mol

Mass of sodium hydroxide required = 3000 g × 2 × 40/44 = 5454.54 g

Therefore, there is not enough sodium hydroxide in the cabin to cleanse the cabin air of the carbon.

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Answer:

Kinetic

Explanation:

A typical solvent for NMR spectroscopy of organic compounds is deuterated chloroform.

What is CDCl3?

Chloroform (CHCl3) is a derivative of CDCl3, in which the hydrogen atom ("H") is switched to the heavy hydrogen isotope deuterium ("D").

CDCl3 is used because of the following two reasons

In order to stabilise the magnetic field strength, contemporary NMR spectrometers evaluate the solvent's deuterium absorption. The deuterium receiver detects a field fluctuation through a change in the observation frequency and can adjust the field intensity accordingly because the observation frequency is field dependant.

Deuterated solvents are used in place of common 1H-containing solvents to prevent the massive solvent absorption that would otherwise ruin the 1H-NMR spectra because there is always a lot more solvent in the sample than substance of interest.

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Answer:

When the Moon is in the position shown below, how would the Moon look to an observer on the North Pole ... The moon's rotational period is equal to its revolutional period around Earth.

Explanation:

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

We know that the leaves are the parts of the plant that are involved in photosynthesis. Photosynthesis is the process by which green plants produce their own food in the presence of sunlight and chlorophyll. We know that the leave has an outer protective covering.

The tissue that plays this outer covering of a plant for is the  epidermis and its waxy cuticle. It prevents damage to the plant.

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

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Asbestos, a fire-resistant material, is no longer used due to its carcinogenicity.

Asbestos, a fire-resistant material that was widely used in building insulation and fireproofing, has been linked to various types of cancer and respiratory diseases. Due to its carcinogenicity and health hazards, it is no longer used in construction. Asbestos fibers are easily inhaled and can cause lung cancer, mesothelioma, and asbestosis, a lung disease that causes shortness of breath and other symptoms.

These health hazards associated with asbestos exposure led to its prohibition in many countries. The United States banned the production and use of asbestos in 1989, while the European Union banned it in 2005. Despite the ban, asbestos is still found in some older buildings and products, which requires safe handling and removal protocols to prevent asbestos exposure and ensure public health and safety.

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Answer:

B

Explanation:

The other answers dont make any sense.

Answer:

true

Explanation:

Answer:

false

Explanation:

i took the test and got it right

Answer:

Movement of tiny particles called atoms, molecules and ions in a solids,liquid and gases. Heat energy can be transferred from one object to another. The transfer or flow due to the difference in temperature between the two objects is called heat.

The statement about atoms that is FALSE from the following options is: B) Atoms are responsible for the sensation of smell.

What is an atom?

An atom is the smallest possible unit of matter that retains the chemical and physical characteristics of a component. Each element is made up of a unique kind of atom that has the same number of protons in its nucleus. In the periodic table, elements are arranged by atomic number.The following are the given options:A) Atoms compose all matter.B) Atoms are responsible for the sensation of smell.C) Atoms are the basic building block of nature.D) An atom is the smallest identifiable unit of an element.E) All of the above statements are true.Out of these given options, B) Atoms are responsible for the sensation of smell is the FALSE statement. The sensation of smell is produced by olfactory receptors in the nasal cavity, which are stimulated by molecules of various shapes and sizes.

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To obtain accurate results, it is crucial to check for black precipitate in the bottom of the container during an H2S test.

During an H2S test, it is essential to look for black precipitate (FeS) in the bottom rather than on the surface. This is because FeS is denser than water and tends to sink to the bottom due to gravity. The H2S test involves adding a solution containing lead acetate to the sample, and if H2S is present, it reacts with the lead acetate to form a black precipitate of FeS.
f the FeS forms on the surface, it may not be a true reflection of the H2S levels in the sample as it could be due to other factors such as air bubbles or agitation. Therefore, it is crucial to check the bottom of the test tube or container for the presence of black precipitate, which indicates the amount of H2S present in the sample.
Also, it is important to note that the color of the precipitate may vary depending on the concentration of H2S in the sample. Higher concentrations of H2S can result in a thicker and darker black precipitate. In summary, to obtain accurate results, it is crucial to check for black precipitate in the bottom of the container during an H2S test.

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Answer:

11.40x10-7

Explanation:

9.80+1.60x10-3-4

11.40x10-7

The molar concentration of a 250.9 mL aqueous solution prepared with 72.4 g of sugar was calculated to be 0.8822 mole/dm3.

Given, the mass of sugar in the aqueous solution = 74.9 g

molar mass of the sugar = 342.3 g/mol

So the number of moles of sugar in the solution can be calculated as

\(\rm mole = 74.9/342.3 = 0.2188\)

The molarity of the solution is= mole/dm3 of the solution

\(\rm M =0.2188/0.2\)

\(\rm M =0.8822 mole/dm^{3}\)

So, the molar concentration of a 250.9 ml aqueous solution is 0.8822 mole/dm3.

A molar is a unit of concentration. The number of moles per liter of the solution. In chemistry, the most common use of the term molar is to refer to the molar concentration in a solution of a particular solute. Molar concentration is expressed in m mol/l or M.

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To calculate the grams of NaCl in a 100 g solution with water, when the solution is 19% NaCl by weight, we can use the formula:

Grams of NaCl = Total weight of solution (in grams) × Percentage of NaCl / 100

In this case, the total weight of the solution is 100 g and the percentage of NaCl is 19%. Plugging in these values:

Grams of NaCl = 100 g × 19 / 100 = 19 grams

Therefore, there are 19 grams of NaCl in the 100 g solution.

Regarding the chemical reaction equation, to balance it, we can use the coefficients to adjust the number of atoms on each side.

The equation is: ___SO2 + ___O2 -> ___SO3

The correct balanced equation is: 2SO2 + O2 -> 2SO3

The coefficients in this balanced equation indicate that we need 2 molecules of SO2, 1 molecule of O2, and 2 molecules of SO3 to balance the reaction.

B. To calculate the density of a substance, we use the formula:

Density = Mass / Volume

In this case, the mass of the gasoline is given as 20.2 kg and the volume is given as 23.7 liters.

Density = 20.2 kg / 23.7 L

Calculating this:

Density = 0.851 Kg/L

Rounding this value to the correct significant figures gives:

Density = 0.85 Kg/L

Therefore, the density of gasoline is approximately 0.85 kg/L.

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b) FALSE A feasible solution must attempt to satisfy all the major constraints in the problem.

A basic viable solution in the theory of linear programming is one that has a small number of non-zero variables. Each viable solution polyhedron's corner correlates geometrically to a BFS. There must be an optimum BFS if there is an optimal solution.

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Enantioselective are reactions that generate products that are enriched in one enantiomer.

Enantiomers are pairs of molecules that exist in two forms that are mirror images of each other but are not superimposable. The enantiomers are chemically identical in all other respects. Enantiomeric pairs are distinguished by the direction in which they rotate polarized light when dissolved in solution, either dextrorotatory (d or +) or levorotatory (l or -). Hence the term optical isomer.

The enantioselectivity of a chromatography system is defined as the preferential interaction of one enantiomer with a chiral selector. It is usually determined as the ratio of the retention factors of the two enantiomers in a chiral chromatography or electrophoresis system.

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The equation shows reactants to a neutralization reaction.

Ca²⁺ + OH⁻ → H⁺ + NO⁻. Here H binds with OH⁻ to make water. So the option c is correct.

As the answer to the question is cleared from these reactions. Firstly calcium hydroxide combines with nitric acid to form the products as follows;

Ca(OH)₂ + 2HNO₃ → Ca(NO₃)₂ + 2H₂O

Now the reaction between ionic species will be as follows

Ca²⁺ + 2OH⁻ + 2H⁺ + 2NO₃⁻ → Ca²⁺ + 2NO₃⁻ + 2H₂O

Hence OH⁻ combines with  H⁺  to make  H₂O(water)  

OH⁻ + H⁺ → H₂O

H⁺ binds with OH⁻ to make water

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The boiling-point change for a solution containing 0.432 mol of naphthalene in 250. g of liquid benzene is a. 4.37 °C

To find the boiling-point change for a solution containing 0.432 mol of naphthalene in 250. g of liquid benzene, we can use the formula:

ΔTb = i × Kbp × molality

where ΔTb is the boiling-point change, i is the van't Hoff factor (for nonionizing compounds, i = 1), Kbp is the molal boiling-point elevation constant for benzene (2.53°C/m), and molality is the moles of solute per kilogram of solvent.

Step 1: Calculate molality.
molality = moles of solute / mass of solvent (in kg)
molality = 0.432 mol / (250 g / 1000 g/kg) = 0.432 mol / 0.25 kg = 1.728 mol/kg

Step 2: Plug the values into the formula.
ΔTb = i × Kbp × molality
ΔTb = 1 × 2.53°C/m × 1.728 mol/kg

Step 3: Calculate the boiling-point change.
ΔTb = 4.37 °C

So, the boiling-point change for the solution is 4.37 °C (option a).

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solubility of copper  (II) phosphate is \(x = \sqrt[5]{1.3 * 10^{-39} }\)

\(Cu_{3} (Po_{4} )_{2}\) (s) ------->  \(3Cu^{3+}\) (aq) + \(2PO^{3-} _{4}\) (aq)

\(K_{sp} = 1.4 * 10^{-37} = [Cu^{2+} ]^{3} [PO^{3-} _{4} ]^{2}\)

The compound dissociates in a 3:2 ratio of copper cations and phosphate anions. Assuming we ignore all other reactions besides dissociation, the compound's molar solubility in pure water x is related to the solubility product constant through the expression

\(K_{sp} = (3x^{2})(2 x^{2} )\)

       = \(108x^{5}\)

\(x^{5} = 1.3 * 10^{-39}\)

\(x = \sqrt[5]{1.3 * 10^{-39} }\)

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44.25 gmol of CO and 40.5 gmol of H2O were produced from  thermal decomposition of 5.0 kg of the unknown starch.

Based on given elemental composition of the starch, we can calculate the molecular formula of starch as C6H10O5.

Mass of C in 5.0 kg starch =\(5.0 kg * 21.24 wt\% = 1.062 kg\)

Mass of H in 5.0 kg starch =\(5.0 kg * 3.24 wt\% = 0.162 kg\)

Mass of O in 5.0 kg starch = \(5.0 kg * 75.52 wt\% = 3.776 kg\)

Using the molecular formula C6H10O5, the total molar mass of starch is 162 g/mol. The balanced chemical equation for thermal decomposition of the starch:\(C6H10O5 -- > 6CO + 5H2O\)

Moles of CO = \((1.062 kg / 12 g/mol) * (6 mol CO / 1 mol C6H10O5) = 44.25 mol CO\)

moles of H2O = \((0.162 kg / 2 g/mol) * (5 mol H2O / 1 mol C6H10O5) = 40.5 mol H2O\)

volume of CO = \((44.25 mol CO) *(22.4 L/mol) = 991.8 L CO\)

volume of H2O = \((40.5 mol H2O) * (22.4 L/mol) = 907.2 L H2O\)

Therefore, 44.25 gmol of CO and 40.5 gmol of H2O were produced from the thermal decomposition of 5.0 kg of the unknown starch.

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1) There is a new product on the right hand side

2) Magnesium and oxygen

3) The stoichiometric coefficient of the reactants

4) The number of atoms of each of the elements in the molecule

5) At the start of the reaction, the elements are isolated while at the end of the reaction, the elements are combined.

We have to note that when we talk about a chemical reaction we mean the combination of two or more substances so that we can be able to get a product that is different from the reactants.

in this case, we can see that the reaction that has taken place is the combination of the oxygen molecule and the magnesium atom so as to give the magnesium oxide compound.

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Answer:

1/6 of your weight on Earth

Answer:

the amount of the force of gravity changes