I need help with this ASAP PLEASE!! WILL MARK BRAINLIEST!!
Write the following value in decimal form

8.99 x 10^-7

Answer:

(d) soap.

Explanation:

A soap is obtained by alkaline hydrolysis of a fat to yield the soap and glycerol. This process is known as saponification.

A soap solution is usually basic. Since phenolphthalein turns pink in an alkaline solution, then when phenolphthalein is added to a soap solution, the solution soon turns pink because it is alkaline in nature.

As a matter of fact, a soap sometimes has almost the pH of baking soda!

Part A: The Arrhenius acid that contains the fluoride anion is hydrofluoric acid (HF).
Part B: There is no Arrhenius acid that contains the ascorbate anion.

Ascorbic acid is a weak organic acid that can act as a reducing agent.
Part C: The Arrhenius acid that contains the bromite anion is hypobromous acid (HBrO).
Part D: The Arrhenius base that contains the lithium cation is lithium hydroxide (LiOH). he name of the Arrhenius acidthat contains the fluoride anion. he name of the Arrhenius acid thatcontains the bromite anion. the name of the Arrhenius acid thatcontains the bromite .

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After heating, approximately 68.17 grams of the anhydrous compound will remain from the initial 56.7-gram sample of \(CoCl_2 6H_2O.\)

To determine the mass of the anhydrous compound remaining after heating, we need to consider the process of dehydration.\(CoCl_2 6H_2O.\) is a hydrated compound, which means it contains water molecules in its structure. Heating the compound drives off the water molecules, leaving behind the anhydrous form.

To calculate the mass of the anhydrous compound, we need to account for the mass lost due to the removal of water. The water molecules in the compound have a known molar mass, which can be used to determine the amount of water lost.

The molar mass of \(H_2O\)is approximately 18 g/mol. Since the\(CoCl_2 6H_2O.\) formula indicates six water molecules, we can calculate the molar mass of water in the compound:

6 water molecules * 18 g/mol = 108 g/mol

Now, let's determine the amount of water in the 56.7-gram sample of \(CoCl_2 6H_2O.\):

56.7 g * (1 mol/108 g) = 0.525 mol of water

Since the molar ratio between\(CoCl_2 6H_2O.\) and the anhydrous cocl2 is 1:1, the amount of anhydrous\(CoCl_2\) remaining will also be 0.525 mol.

Finally, we can calculate the mass of the anhydrous \(CoCl_2\)

0.525 mol * (129.89 g/mol) = 68.17 g

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Answer:

C

Explanation:

Answer:

1.20 mole

Explanation:

1 Mole of Cu reacts to form  =  1 Mole of Hg

(1.20 mol × 1 mol) ÷ 1 mol

1.20 mol of Hg

The equilibrium constant expression for the reaction 3P(s) + 4O2(g) ⇌ P₃O₈(s) is as follows:

K = [P₃O₈(s)] / ([P(s)]³ [O2(g)]⁴)

The numerator of the expression, [P₃O₈(s)], represents the concentration of P₃O₈ in the solid phase at equilibrium. The denominator consists of the concentrations of P raised to the power of 3 ([P(s)]³) and O2 raised to the power of 4 ([O2(g)]⁴). These exponents reflect the stoichiometric coefficients of the reactants in the balanced equation, indicating their respective contributions to the equilibrium constant.

The equilibrium constant expression provides a quantitative measure of the extent to which the reaction favors the formation of products or reactants at equilibrium.

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The reaction is stereospecific is false about  Diels-Alder reaction.

Thus, A conjugated diene and an alkene (dienophile) react to generate unsaturated six-membered rings in the Diels-Alder reaction. The reaction is also known as a "cycloaddition" because it results in the production of a cyclic product via a cyclic transition state.

The Diels-Alder reaction is an electrocyclic reaction that involves the [4+2]cycloaddition of 2 electrons from the dienophile (an alkene or an alkyne) and 4 electrons from the conjugated diene. New -bonds, which are energetically more stable than the -bonds, are formed during the process.

Two German chemists, Otto Diels and Kurt Alder, discovered this reaction in 1928, and it is extremely important for synthetic processes. In 1950, they received the Nobel Prize.

Thus, The reaction is stereospecific is false about  Diels-Alder reaction.

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"The reaction is stereospecific" is a false statement about Diels-Alder reaction. The correct option is A.

A conjugated diene and a dienophile are combined to generate a cyclic product known as a cycloadduct in the Diels-Alder process, which is a pericyclic reaction. Despite having stereoselectivity, the Diels-Alder reaction is not thought to be stereospecific.

The word "stereospecificity" describes a reaction in which the stereochemistry of the reactant, dictates the stereochemistry of the result. The stereochemistry of the reactants in the Diels-Alder reaction also does not always determine the stereochemistry of the product.

Thus, the ideal selection is option A.

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Answer:

Hydrogen gas and a salt formed at the end of the reaction.

Explanation:

Hydrogen Gas has formed which inflated the balloon

Usually, metals and acids react to form a salt and Hydrogen Gas.

Here's what happened:

Zn (s) + 2HCl (aq) →  \(ZnCl_2\)(aq) +\(H_2\)(g)

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Answer:

One or more new substances formed.

Explanation:

This is an example of a chemical property because bubbles formed, and the mixture produced a gas which allowed the balloon to inflate. The production of bubbles is an indicator of a chemical change. When a chemical change occurs, one or more new substances form as a result.

- I took the quiz and got 100%

Hope this helps!

Answer:

B. melting of ice caps

Explanation:

When 20.0g of FeS2 reacts with 16.0g of O2 according to the given balanced equation, approximately 26.7g of SO3 is produced.

To determine the grams of SO3 produced when 20.0g of FeS2 reacts with 16.0g of O2, we need to use the balanced equation provided: 4 FeS2 (s) + 15 O2 (g) -> 8 FeO (s) + 8 SO2 (g)The molar masses of FeS2 and O2 are 119.98 g/mol and 32.00 g/mol, respectively. Using these values, we can calculate the number of moles of FeS2 and O2:Number of moles of FeS2 = 20.0g / 119.98 g/mol = 0.1667 mol

Number of moles of O2 = 16.0g / 32.00 g/mol = 0.500 mol

According to the balanced equation, the ratio between FeS2 and SO3 is 4:8. Therefore, the number of moles of SO3 produced would be twice the number of moles of FeS2:Number of moles of SO3 = 2 * 0.1667 mol = 0.3334 molThe molar mass of SO3 is 80.06 g/mol, so we can calculate the mass of SO3 produced:Mass of SO3 = 0.3334 mol * 80.06 g/mol = 26.7 g

Therefore, when 20.0g of FeS2 reacts with 16.0g of O2, approximately 26.7 grams of SO3 are produced.

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Answer:

can you please type english?Explanation:

Answer:

4

Explanation:

Answer: 4.35%

Explanation:

Scientists estimate that the current composition of gases in the Earth's atmosphere has been stable for the last 200 million years or so.

If the Earth was formed 4,600 million years ago then the percentage of her age that the atmosphere has been in its composition is:

= 200 / 4,600 * 100%

= 4.35%

The volume of 0.00703 mol of neon gas under the same temperature and pressure as 0.00901 mol of neon gas occupying 242 ml is 188 ml.

According to the Ideal Gas Law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

Assuming that the temperature and pressure are constant, we can set up a proportion to find the volume of 0.00703 mol of neon gas:

0.00901 mol neon / 242 ml = 0.00703 mol neon / x

Solving for x, we get:

x = (0.00703 mol neon * 242 ml) / 0.00901 mol neon

x = 188 ml

Therefore, the volume of 0.00703 mol of neon gas under the same conditions is 188 ml.

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Emerging scientific ideas are new theories or ideas that are gaining attention in the scientific community, but have not yet been fully accepted or confirmed.

Emerging ideas refer to the new and innovative ideas or theories that have yet to gain full scientific acceptance. While a scientific consensus is a view or theory that has been universally accepted and confirmed by multiple experiments or research, an emerging scientific idea is a new and unproven theory or idea that is gaining attention in the scientific community. These emerging ideas may also be referred to as scientific hypotheses. In contrast to scientific consensus, emerging scientific ideas have not yet been subjected to rigorous testing and confirmation.

They are generally proposed to explain new observations or experimental results, which have not yet been fully understood or explained by established scientific theories. Emerging scientific ideas can have the potential to challenge the current scientific consensus. If an emerging scientific idea is found to be valid, it can ultimately lead to the establishment of a new scientific consensus. For example, the emerging scientific idea of the Higgs boson particle led to the discovery of a new field in particle physics, which is now an established scientific consensus.

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Answer:

13.4 (w/w)% of CaCl₂ in the mixture

Explanation:

All the Cl⁻ that comes from CaCl₂ (Calcium chloride) will be precipitate in presence of AgNO₃ as AgCl.

To solve this problem we must find the moles of AgCl = Moles of Cl⁻. As 2 moles of Cl⁻ are in 1 mole of CaCl₂ we can find the moles of CaCl₂ and its mass in order to find mass percent of calcium chloride in the original mixture.

Moles AgCl - Molar mass: 143.32g/mol -:

0.535g * (1mol / 143.32g) = 3.733x10⁻³ moles AgCl = Moles Cl⁻

Moles CaCl₂:

3.733x10⁻³ moles Cl⁻ * (1mol CaCl₂ / 2mol Cl⁻) = 1.866x10⁻³ moles CaCl₂

Mass CaCl₂ -Molar mass: 110.98g/mol-:

1.866x10⁻³ moles CaCl₂ * (110.98g/mol) = 0.207g of CaCl₂ in the mixture

That means mass percent of CaCl₂ is:

0.207g CaCl₂ / 1.55g * 100 =

Answer:

Conc. of H+ IONS

Explanation:

Answer:

NO

The mass number of an atom is the total number of protons and neutrons it contains. The mass number of an atom is never smaller than the atomic number.

EXPLANATION:-

The atomic number is always a lesser value than the mass number. The mass number is always a greater value than the atomic number. Atoms are made of electrons, protons, and neutrons. Protons and neutrons together form the nucleus of an atom

Atomic number = number of proton/number of electron

mass number = number of proton + number of Neutron

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The substance heats up relatively quickly means less energy needed for the rise in temperature. Therefore, the substance is having low specific heat.

Of all liquids, water has the highest specific heat capacity. The amount of heat that one gram of a substance needs either absorb or lose in order to change its temperature by one degree Celsius is known as specific heat. A compound with "low specific heat" will raise its temperature considerably more quickly than a compound with "high specific heat." J/kg C or J/g C are the units for specific heat. While substances with (high or low) particular heats will be more challenging to heat up, substances with (high or low) specific heats will heat up readily.

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Answer:

A. Protons and electrons

The number of moles of the gas present is  0.6245 moles.

STP stands for Standard Temperature and Pressure, which is defined as a temperature of 273.15 K (0°C) and a pressure of 1 atmosphere (atm). At STP, one mole of any ideal gas occupies a volume of 22.4 L.

Using the ideal gas law, we can calculate the number of moles of hydrogen gas present in a sample of 14.1 L at STP:

PV = nRT

where P = pressure, V = volume, n = number of moles, R = gas constant, and T = temperature.

At STP, P = 1 atm and T = 273.15 K. The gas constant R is 0.08206 L atm/mol K.

Substituting the values into the equation, we get:

(1 atm) (14.1 L) = n (0.08206 L atm/mol K) (273.15 K)

Simplifying and solving for n, we get:

n = (1 atm x 14.1 L) / (0.08206 L atm/mol K x 273.15 K)

= 0.6245 mol

Therefore, there are 0.6245 moles of hydrogen gas present in a sample of 14.1 L at STP.

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Answer:

He blasted alpha rays at the gold foils. The Alpha rays are charged positive. When he blasted them the protons deflected and changed the course of them and the electrons surrounding the atom let them through. In the plum pudding model they were supposed to be sprinkled on which was clearly wrong according to that experiment.

Explanation:

0.87 g of hydrogen is produced by the reaction of 7.80 g of calcium with 1.83 g of water.

To find the amount of hydrogen produced in the reaction, we need to calculate the theoretical yield of hydrogen. This is done by finding the amount of calcium and water that react and finding the amount of hydrogen that is produced from this amount.

From the given information, 7.80 g of calcium reacts with 1.83 g of water. We can use the balanced equation for the reaction to find the amount of hydrogen produced:

Ca + 2H₂O -> Ca(OH)₂ + H2

From this equation, 1 mole of calcium reacts with 2 moles of water to produce 1 mole of hydrogen.

So, the theoretical yield of hydrogen is (1.83 g/mole) x (1 mole/2 moles) = 0.92 g of hydrogen.

Finally, the actual yield of hydrogen is found by multiplying the theoretical yield by the reaction yield, which is 94.4%.

The actual yield of hydrogen = 0.92 g x 94.4% = 0.87 g

Therefore, 0.87 g of hydrogen is produced by the reaction of 7.80 g of calcium with 1.83 g of water.

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The root-mean-square speed-vrms = 615 m/s

Given

O₂ molecules

T = 212 + 273 = 485 K

Required

The root-mean-square speed

Solution

Average velocities of gases can be expressed as root-mean-square averages. (V rms)  

\(\large {\boxed {\bold {v_ {rms} = \sqrt {\dfrac {3RT} {Mm}}}}\)

R = gas constant, T = temperature, Mm = molar mass of the gas particles  

R = 8,314 J / mol K  

T = temperature  

Mm = molar mass, kg / mol  = 0.032 kg/mol

Input the value :

v rms = √(3x8.314 J/mol K x 485 K)/0.032

vrms = 615 m/s

Answer:

i think its -91.6

Explanation:

2 ( - 950.8) - (( - 1130.7) + ( - 393.5) + ( - 285.8))

The standard enthalpy change for the given reaction is approximately 91.9 kJ mol⁻¹.

The heat produced during a chemical reaction under specific conditions is known as the standard enthalpy change, abbreviated as H° (zero delta H). Standard conditions often refer to all reactants and products in their standard states, which are their most stable forms at 298 K and 1 bar (or 1 atm) pressure.

Hess's law, which states that the total enthalpy change of a reaction is equal to the sum of the enthalpy changes of its component phases, is used to calculate the standard enthalpy change of the reaction.

The following reaction is given:

\(\rm 2 NaHCO_3(s)--- > Na_2CO_3(s)+ CO_2(g) + H_2O(l)\)

The relevant enthalpy changes of formation are:

ΔH°[NaHCO3(s)] = -950.8 kJ mol⁻¹

ΔH°[Na2CO3(s)] = -1130.7 kJ mol⁻¹

ΔH°[CO2(g)] = -393.5 kJ mol⁻¹

ΔH°[H2O(l)] = -285.8 kJ mol⁻¹

By using Hess's Law, the standard enthalpy change (ΔH°) for the reaction can be calculated as follows:

ΔH° = Σ (products) - Σ (reactants)

ΔH° = [ΔH°[\(\rm Na_2CO_3\)(s)] + ΔH°[\(\rm CO_2\)(g)] + ΔH°[H2O(l)]] - [2 × ΔH°[\(\rm NaHCO_3\)(s)]]

ΔH° = [-1130.7 kJ mol⁻¹ + (-393.5 kJ mol⁻¹) + (-285.8 kJ mol⁻¹)] - [2 × (-950.8 kJ mol⁻¹)]

ΔH° = [-1809.7 kJ mol⁻¹] - [-1901.6 kJ mol⁻¹]

ΔH° ≈ -1809.7 kJ mol⁻¹ + 1901.6 kJ mol⁻¹

ΔH° ≈ 91.9 kJ mol⁻¹

Hence, the standard enthalpy change for the given reaction is approximately 91.9 kJ mol⁻¹.

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Answer:

3.01 * 10 ^ 23 atoms of Pt

Explanation:

1 mole of Pt contains 6.02 * 10 ^ 23 atoms of Pt

195.084 g of Pt has  6.02 * 10 ^ 23 atoms of Pt  

97.6 g = .5 moles so  

97.6 g of Pt has 3.01 * 10 ^ 23 atoms of Pt

The 97.6 grams of platinum contains \(3.011\times 10^{23}\) atoms.

Given:

The mass of platinum = 97.6 grams

To find:

The number of platinum atoms in 97.6 grams.

Solution:

Mass of platinum = 97.6 g

Moles of platinum =\(\frac{97.6g}{195.084 g/mol}=0.500 mol\)

According to the mole concept:

1 mole = Avogadro Number = \(N_A=\) \(6.022\times 10^{23} atoms/ molecules/ions\)

The number of platinum atoms in 0.500 moles of platinum:

\(=0.500\times 6.022\times 10^{23} atoms\\\\=3.011\times 10^{23} atoms\)

The 97.6 grams of platinum contains \(3.011\times 10^{23}\) atoms.

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The total moles of Ba2+ ions in 0.750 M BaCl2 solution = 0.750 mol/L × 2 mol Ba2+ / 1 mol BaCl2 = 1.50 mol/L The concentration of barium ions (Ba2+) in the given solution is 1.50 M.

The given terms are "150", "concentration", and "barium" and the question is "what is the concentration of barium ions in a 0.750 mbacl2

Let's solve the question by using the formula of molarity.

Molarity (M) = moles of solute/ liters of solution

Now, the molarity of the given solution, mbacl2 = 0.750 mMolar mass of BaCl2 = 208.23 g/molMolar mass of Ba ions = 137.33 g/molThe Ba2+ and Cl- ions dissociate when the BaCl2 compound dissolves in water. That is, each BaCl2 molecule splits into one Ba2+ ion and two Cl- ions.

Hence, the total moles of Ba2+ ions in 0.750 M BaCl2 solution = 0.750 mol/L × 2 mol Ba2+ / 1 mol BaCl2 = 1.50 mol/L The concentration of barium ions (Ba2+) in the given solution is 1.50 M.

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The atmosphere is the thin layer of gases that surrounds the Earth and provides a protective layer for all life on the planet. The correct answer is 1.

It is composed mainly of nitrogen (78%) and oxygen (21%), along with other gases like argon, carbon dioxide, and neon. This layer helps to regulate the Earth's temperature and protect it from harmful radiation from the sun. The atmosphere also plays a critical role in the water cycle, helping to move water vapor from one part of the planet to another. Humans and many other living organisms depend on the air in the atmosphere to breathe and survive, making it a vital part of the biosphere. Hence Correct answer is 1.

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--The complete question is, What part of the biosphere contains the AIR that we breathe?

1. Atmosphere

2. Lithosphere

3. Hydrosphere

4. Stratosphere --

Answer:

\(\%LiClO_3=90.4\%\)

Explanation:

Hello!

In this case, since the undergoing chemical reaction is:

\(LiClO_4\rightarrow LiCl+\frac{3}{2} O_2\)

It is widely known that when a gas given off from a reaction is collected over water, we can compute its pressure by minusing the total pressure 762 mmHg and the vapor pressure of water at the experiment's temperature (20 °C) in this case 17.5 mmHg as shown below:

\(p_{O_2}=762mmHg-17.5mmHg=744.5mmHg*\frac{1atm}{760mmHg}=0.980atm\)

Next, by using the ideal gas equation we compute the yielded moles of oxygen considering the collected 313 mL (0.313 L):

\(n_{O_2}=\frac{PV}{RT}=\frac{0.980atm*0.313L}{0.082\frac{atm*L}{mol*K}*293.15K}\\\\ n_{O_2}=0.0128molO_2\)

Now, via the 3/2:1 mole ratio between oxygen and lithium chlorate (molar mass = 90.39 g/mol), we compute the original mass of decomposed lithium chlorate as follows:

\(m_{LiClO_3}=0.0128molO_2*\frac{1molLiClO_3}{3/2molO_2}*\frac{90.39gLiClO_3}{1molLiClO_3} \\\\m_{LiClO_3}=0.771gLiClO_3\)

Now, the percentage is computed as shown below:

\(\%LiClO_3=\frac{0.771g}{0.853g} *100\%\\\\\%LiClO_3=90.4\%\)

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