How much water can be heated, using 1.0 BTU, from 63 °F to 64 °F?

The number of electrons can be predicted in a neutral atom  because the number of protons and electrons in a neutral atom will be identical, we can readily calculate the electron number from the atomic number.

An atom's atomic number can be used to forecast its electrical structure. The atomic number can be used to forecast the total number of electrons because neutral atoms have an equal number of protons and electrons.

So, If you know what group the atom's element belongs to and the group number correlates to the number of electrons on the valence shell and you can determine how many atoms are on the atom's valence shell.

Learn more about electrons from

https://brainly.com/question/25674345
#SPJ1

Answer:

gravitational force.

Answer:

2.00moles

Explanation:

mol=mass/mr

88.02/ [12+2(16)] = 2.00

K2SO4(aq) solution to be add to of the mixture of ba2 (aq)ba2 (aq) and mg2 (aq)mg2 (aq) to precipitate one cation while keeping the other cation in solution

When we add K2SO4(aq) to a mixture of Ba2+(aq) and Mg2+(aq), only Ba2+(aq) precipitates out as BaSO4 while Mg2+ remains in aqueous solution.

Here 2 K+ and Mg2+ exist in aqueous solution.

Net Ionic Equation: Ba2+(aq) + SO42-(aq) → BaSO4 (s)

Precipitation is the process of changing a dissolved material from a super-saturated solution to an insoluble solid in an aqueous solution. Precipitate refers to the produced solid. The chemical agent that initiates the precipitation in an inorganic chemical process is referred to as the precipitant.

The term "supernate" or "supernatant" also refers to the clear liquid that remains on top of the precipitated or centrifuged solid phase.

When solid impurities separate from a solid phase, the concept of precipitation may also be used to other areas of chemistry, such as organic chemistry and biochemistry, as well as the solid phases (such as metallurgy and alloys).

Learn more about Solution here:

https://brainly.com/question/7932885

#SPJ4

Answer:

See Explanation

Explanation:

The reactivity of a metal towards water depends on the position of the metal in the electrochemical series. Metals that are high up in the series do react violently and spontaneously with water. Metals that are lower in the series are sometimes unreactive in water.

Hence, potassium reacts very rapidly with water to yield KOH and hydrogen gas while gold does not react with water.

SO2 react with water to form sulphuric acid hence SO2 is called an acid anhydride.

The reaction occurs in the following steps;

2SO2(g) + O2(g) ------->2SO3(g)

SO3(g) + H20(l) ------>H2SO4(aq)

Answer:

i can send u all of the bio stuff i have maybe it will help

Explanation:

Energy enters into the ecosystem via sunlight and leaves as heat from metabolism.

The term energy refers to the ability to do work. Energy enters the ecosystem from the sun and is transformed into chemical energy in food which is now passed along the food chain.

Animals eat plants and part of this energy is used for metabolic activities which releases some of this energy as heat energy.

Learn more about energy:https://brainly.com/question/1932868

#SPJ1

1. (A). All weak acids have a pH value that is higher than that of strong acids. Compared to strong acids, which dissociate completely and produce a higher concentration of H+ ions, resulting in a lower pH, weak acids partially dissociate in water, producing hydrogen ions (H+). produce a low concentration of K, leading to a high pH value.

B. All weak bases have a lower pH than strong bases. Compared to strong bases, which dissociate completely and form a higher concentration of OH- ions, weak bases receive fewer hydrogen ions from water, resulting in a lower concentration of hydroxide ions (OH-), As a result of which the pH value is reduced.

2. A. All strong acids are more acidic than weak acids in terms of pH. Compared to weak acids that only partially dissociate in water, strong acids dissociate completely, resulting in a larger concentration of H+ ions and a lower pH value.

B. All strong bases have pH values ​​that are higher than those of weak bases. Compared to weak bases that only partially take up hydrogen ions, strong bases dissociate completely in water, producing a greater concentration of OH-ions and a higher pH value.

3. Hydrochloric acid (HCl), sulfuric acid (H2SO4), and nitric acid (HNO3) are some examples of substances that are listed as strong acids with a pH of 1-2.

4. Among others, sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium hydroxide (Ca(OH)2) are examples of substances classified as strong bases with a pH of 13–14.

5. Acetic acid (CH3COOH), formic acid (HCOOH), and carbonic acid (H2CO3), among others, can be classified as weak acids with a pH range of 5–6.4.

6. Ammonia (NH3), ammonium hydroxide (NH4OH), and methylamine (CH3NH2), among other substances, can be classified as weak bases with a pH range of 7.5 to 9.

Learn more about Acids, here:

https://brainly.com/question/29796621

#SPJ1

N₂(g) + 2O₂(g) → 2NO₂(g) represents a reaction with a heat of reaction that indicates a net release of energy.

Thus, Exothermic refers to a chemical reaction that produces a net release of energy. On the other hand, an endothermic chemical reaction needs a net energy intake to proceed. The formation or breaking of chemical bonds corresponds to the link between chemical reactions and energy exchange.

When all other things are equal, atoms that are bound together have less total energy than the same atoms that are existing apart.

As a result, when individual atoms come together to create a molecule, they transition from a high to a low energy state, releasing the energy difference in some form (heat, light, etc.). On the other hand, to sever the chemical link and force the atoms apart, energy must be applied.

Thus, N₂(g) + 2O₂(g) → 2NO₂(g) represents a reaction with a heat of reaction that indicates a net release of energy.

Learn more about Energy, refer to the link:

https://brainly.com/question/1932868

#SPJ1

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{4.3 \times {10}^{27} }{6.02 \times {10}^{23} } \\ = 7142.857...\)

We have the final answer as

Hope this helps you

Considering the Boyle's law, the resulting volume if the pressure were increased to 3.9 atm and the temperature did not change is 4 L.

As the volume increases, the particles (atoms or molecules) of the gas take longer to reach the walls of the container and therefore collide less times per unit of time against them. This means that the pressure will be lower because it represents the frequency of shocks of the gas against the walls. In this way, pressure and volume are related, determining Boyle's law that says:

"The volume occupied by a given mass of gas at constant temperature is inversely proportional to the pressure"

Boyle's law is expressed mathematically as:

P×V=k

Considering an initial state 1 and a final state 2, the following holds:

P₁×V₁=P₂×V₂

In this case, you know:

Replacing in the Boyle's law:

1.3 atm× 12 L=3.9 atm× V₂

Solving:

(1.3 atm× 12 L)÷3.9 atm= V₂

4 L= V₂

The new volume will be 4 L.

Learn more about Boyle's law:

brainly.com/question/4147359

#SPJ1

Answer:

i believe its gas sorry if i am wrong

Explanation:

Condensation is the process through which a gas changes into a liquid. They come together to form water droplets.

What is Condensation?

Condensation is the process through which matter transitions from its initial gaseous state into its final liquid state. For instance, condensation happens when water vapour in the air, which is in its gaseous form, comes into touch with a cooler surface and turns into liquid water. The water in the air condenses into water droplets when it comes into touch with a cold surface. Evaporation reaction is the opposite of condensation. When water transitions from a gaseous state to a liquid or crystal state, condensation takes place. Any gas can condense at high pressure and low temperature.

To learn more about Condensation visit;

https://brainly.com/question/956180

#SPJ4

The genotype probability is :

PP = 25 %

Pp = 50 %

pp = 25 %

Phenotype probability:

Purple color) = 75 %

white color = 25 %

The genotype of an offspring is the sum total of all the genes inherited from the parents.

The phenotype is the physical expression of that genotype.

Given that purple color P is dominant over white color, p in flowers, the cross between two heterozygous purple-colored flower plant, Pp will produce the following genotype and phenotype probabilities:

Pp x Pp = PP, Pp, Pp, pp

Genotype ratio will:

PP = 25 %

Pp = 50 %

pp = 25 %

Phenotype ratio:

Purple color (PP, Pp, Pp) = 75 %

white color (pp) = 25 %

Learn more about phenotype and genotype at: https://brainly.com/question/902712

#SPJ1

Answer:

\( \huge{ \boxed{1.213 \: \text{moles}}}\)

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\( \bold{n = \frac{N}{L}} \\ \)

where

From the question

N = 7.30 × 10²³ NaCl molecules

\(n = \frac{7.30 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{7.30}{6.02} \\ = 1.2126\)

We have the final answer as

Answer:

Electrically neutral atoms simply possess the same number of electrons as protons.

Explanation:

This gives the objects a balance of both type of charge. There are 11 electrons and 10 protons.

The statement is True. Electrically neutral atoms have an equal number of electrons and protons, balancing out the atomic charges and making the atom neutral.

The statement 'Electrically neutral atoms have equal numbers of electrons and protons' is True. In an electrically neutral atom, the number of protons in the nucleus is exactly balanced by the number of electrons surrounding the nucleus. This is due to the fact that the proton has a positive charge, and the electron has an equivalent but negative charge. So, when the number of protons equals the number of electrons, these charges cancel each other out and the atom as a whole is neutral.

https://brainly.com/question/33440812

#SPJ6

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

Learn more about mixture at: https://brainly.com/question/12160179

#SPJ1

If the nucleophile concentration is unchanged and the alkyl halide concentration is doubled; the rate of reaction remains the same, it is unchanged.

The rate of reaction of tertiary alkyl halides with a nucleophile is independent of the concentration of the nucleopohile but depends only on the initial concentration of the alkyl halide, because tertiary alkyl halides reacts via SN1 mechanism.

For an SN2 reaction, the rate of reaction depends both on the alkyl halide concentration and the nucleophile concentration. If we unchange the concentration of the nucleophile and double the concentration of the alkyl halide, the rate of reaction just remains the same because the reaction is bimolecular.

Learn more about nucleophile concentration at: https://brainly.com/question/14259828

#SPJ4

Answer:

the different things that we have and animals are.:

The mass of ammonia which contains a million of hydrogen atoms will be 0.944 g.

To calculate the mass of ammonia that contains a million hydrogen atoms, we need to use the molar mass of ammonia and Avogadro's number.

The molar mass of ammonia (NH₃) is 17.03 g/mol, which means that one mole of ammonia has a mass of 17.03 grams. In one mole of ammonia, there are three moles of hydrogen atoms, or 6.022 x 10²³ hydrogen atoms (Avogadro's number).

Therefore, to find the mass of ammonia that contains a million hydrogen atoms, we can use the following equation;

(1 million hydrogen atoms) / (6.022 x 10²³ hydrogen atoms/mol) x (1 mol ammonia / 3 mol hydrogen atoms) x (17.03 g/mol ammonia) = 0.944 g

Rounding this to two significant digits, the mass of ammonia that contains a million hydrogen atoms is approximately 0.94 g. The unit symbol is grams (g).

To know more about ammonia here

https://brainly.com/question/14672082

#SPJ4

Answer:

Not C

Explanation:

Just took it

Answer:

A double bond, because they overlap orbitals to share two pairs of electrons.

Explanation:

I took a quiz with this question and i got it correct.

The formula for the relationship between weight and blood pressure in children is:

We differentiate the above function with respect to x Therefore:

Rate of change at the 70-pound weight level:

Blood is a fluid found in all living things that functions to deliver substances and oxygen needed by body tissues, transports chemical products of metabolism, and also acts as the body's defense against viruses or bacteria. Blood has the function of regulating acid and base balance. ,transports O2, carbohydrates, and metabolites, regulates body temperature by conduction or conduction, carries body heat from heat production centers (liver and muscles).

Learn More About Blood at https://brainly.com/question/920424

#SPJ11

Answer:

Explanation:

Sodium Acetate Trihydrate BP Specifications

Sodium Acetate BP

C2H3NaO2,3H2O

Action and use

Used in solutions for dialysis; excipient.

DEFINITION

Sodium ethanoate trihydrate.

Content

99.0 per cent to 101.0 per cent (dried substance).

CHARACTERS

Appearance

Colourless crystals.

Solubility

Very soluble in water, soluble in ethanol (96 per cent).

IDENTIFICATION

A. 1 ml of solution S (see Tests) gives reaction (b) of acetates.

B. 1 ml of solution S gives reaction (a) of sodium.

C. Loss on drying (As shown in the Relevant Test).

TESTS

Solution S

Dissolve 10.0 g in carbon dioxide-free water prepared from distilled water R and dilute to 100 ml 100 ml with the same solvent.

Appearance of solution

Solution S is clear and colourless.

pH

7.5 to 9.0.

Dilute 5 ml of solution S to 10 ml with carbon dioxide-free water.

Reducing substances

Dissolve 5.0 g in 50 ml of water, then add 5 ml of dilute sulphuric acid and 0.5 ml of 0.002 M potassium permanganate. The pink colour persists for at least 1 h. Prepare a blank in the same manner but without the substance to be examined.

Chlorides

Maximum 200 ppm.

Sulphates

Maximum 200 ppm.

Aluminium

Maximum 0.2 ppm, if intended for use in the manufacture of dialysis solutions.

Arsenic

Maximum 2 ppm, determined on 0.5 g.

Calcium and magnesium

Maximum 50 ppm, calculated as Ca.

Heavy metals

Maximum 10 ppm.

Iron

Maximum 10 ppm, determined on 10 ml of solution S.

Loss on drying

39.0 per cent to 40.5 per cent, determined on 1.000 g by drying in an oven at 130C.

Sodium Acetate FCC Food Grade, US Food Chemical Codex

C2H3NaO2 Formula wt, anhydrous 82.03

C2H3NaO2·3H2O Formula wt, trihydrate 136.08

DESCRIPTION

Sodium Acetate occurs as colorless, transparent crystals or as a granular, crystalline or white powder. The anhydrous form is hygroscopic; the trihydrate effloresces in warm, dry air. One gram of the anhydrous form dissolves in about 2 mL of water; 1 g of the trihydrate dissolves in about 0.8 mL of water and in about 19 mL of alcohol.

Function: Buffer.

REQUIREMENTS

Identification: A 1:20 aqueous solution gives positive tests for Sodium and for Acetate.

Assay: Not less than 99.0% and not more than 101.0% of C2H3NaO2 after drying.

Alkalinity Anhydrous: Not more than 0.2%; Trihydrate: Not more than 0.05%.

Lead: Not more than 2 mg/kg.

Loss on Drying: Anhydrous: Not more than 1.0%; Trihydrate: Between 36.0% and 41.0%.

Potassium Compounds: Passes test.

The percent yield of sodium acetate is 35.09%

Percent yield is the ratio of actual yield divided by theoretical yield multiplied by 100. It gives information regarding the percentage of products formed in the reaction.

Percentage yield = Actual yield / Theoretical yield × 100

We know that,

                 NaHCO₃ + CH₃COOH ⇒ CH₃COONa + CO₂ + H₂O

Given,

Mass of NaHCO₃ = 15g

Concentration of acetic acid = 0.15M

Volume of acetic acid = 125 ml

actual yield of sodium acetate = 0.537g

Number of moles = mass of substance ÷ molar mass

number of moles of NaHCO₃ = 15 ÷ 84

                                               = 0.1785 moles

Moles of acetic acid = Concentration × volume (in L)

                                  = 0.15 × 0.125 = 0.0187 moles

Since, the number of moles of acetic acid is lesser, it is the limiting reagent.

From the reaction,

1 mole of acetic acid gives 1 mole of sodium acetate.

So, 0.0187 moles of acetic acid should give 0.0187 moles of sodium acetate.

Thus, mass of sodium acetate = moles × molar mass

                                                  = 0.0187 × 82

                                                   = 1.53g

Theoretical yield of sodium acetate = 1.53g

Using the formula for percent yield:

Percent yield = (0.537 ÷ 1.53) × 100

                      = 35.09%

Therefore, the percent yield of sodium acetate is 35.09%

Learn more about Percent yield, here:

https://brainly.com/question/2506978

#SPJ5

Diffusion takes place in the gas phase by the random motion of gas molecules. The thermal motion of gas particles at above absolute zero temperature is called molecular diffusion. Since, molecular diffusion occurs as a result of thermal motion of the molecules, it proceeds at a maximum rate in gases, at a lower rate in liquids, and at a still lower rate in solids.

The diffusion rate can be calculated by t=x²/(2D)

How to calculate the diffusion of gas at a particular distance?

Apply,

time= x²/(2D)

where

D= Diffusion constant = 10 ↑ -9 m²/s

x= distance =15 mm = 15 * 10↑-3 m

then, substitute

t= (15*10↑-3)²/2*10↑-9

=112.5 * 10↑ -3 sec

Thus, Diffusion of gas at a particular distance is

t =3.125* 10↑-5 hours

To know more about molecular diffusion, click on https://brainly.com/question/94094

#SPJ4

Potassium fluoride and sodium hydroxide react to produce potassium hydroxide and sodium fluoride respectively. Option 2.

Potassium fluoride and sodium hydroxide undergo a double decomposition reaction. They exchange radicals to produce potassium hydroxide and sodium fluoride respectively according to the following equation:  

\(KF + NaOH --- > KOH + NaF\)

Potassium is able to displace sodium from sodium hydroxide because it is higher on the reactivity series of metals than sodium.

Thus, the product of the reaction of potassium fluoride and sodium hydroxide are \(KOH\) and \(NaF\).

More on chemical reactions can be found here: https://brainly.com/question/29762834

#SPJ1

Answer:

hey here is the answer to your question.

Explanation:

1) Write a balanced equation for the reaction occurring. (*Iron occurs in a few different oxidation states, but I will assume we're referring to Fe(II) or Fe2+)

Fe + CuSO4 -> Cu + FeSO4

2) Calculate the number of moles of each reactant.

Fe: 1.924 g * (1 mol / 55.85 g) = 0.03455 mol Fe

CuSO4: 0.1363 L * (0.0750 mol / 1 L) = 0.01022 mol CuSO4

3) Determine the limiting reactant. Because we have fewer moles of copper(II) sulfate and are reacting both reactants in a 1:1 ratio, we will run out of copper(II) sulfate first, making it the limiting reactant.

4) Convert moles of the limiting reactant to moles and grams of product of interest.

0.01022 CuSO4 (1 mol Cu / 1 mol CuSO4 ) (63.55 g Cu / 1 mol Cu) = 0.6495 g Cu

Answer: (D) Superconductivity

Explanation: Edge 2021

Answer:

D

Explanation:

got it right. :)

Explanation:

We are given: volume of alcohol = 17.4mL

: volume of solution = 131mL

Answer:

Percent by volume is 13.28%.

Answer:

A net ionic equation shows only the chemical species that are involved in a reaction, while a complete ionic equation also includes the spectator ions.

Brainlist pls!