During a titration a student found that 20.0cm3 of sodium carbonate solution
neutralised 27.9 cm3 of 0.500 mol/dm3 nitric acid solution.
Calculate the concentration of the sodium carbonate solution in mol/dm3. Give
your answer to 3 significant figures.

The factors affect wave height is the duration of the wind

Answer:

all answers are correct

Fetch

Strength of wind

Direction of the wind

Duration of wind

Explanation:

i took the quiz hope this helps!

Answer:

Clearing Land for a highway

Explanation:

The other examples are that of naturally occurring disasters and most life in that region have ways to regrow and repopulate in the case of those disasters. While a highway is a manmade object and interrupts the environment to the point that the new animals will not know how to deal with it. That is also why there are a lot of dead deer are found on the side of the road when a new highway is built.

Clearing land for a highway would most likely cause an ecosystem to have the lowest biodiversity and population sizes 3 years later. Therefore, option D is correct.

Biodiversity refers to the variety of life that can be found in a given area, including animals, plants, fungi, and even microorganisms such as bacteria. Each of these species and organisms collaborate in ecosystems to maintain balance and support life, much like an intricate web.

Every one of these exists in delicate balance and lives and works together in ecosystems to sustain and support life on Earth.

Typically, three levels of biodiversity are discussed: genetic diversity, species diversity, and ecosystem diversity. Genetic diversity refers to the various genes found in all plants, animals, fungi, and microorganisms. It can occur both within and between species.

Thus, option D is correct.

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Answer:

Mass of the second spaceship is 3.10 × 10⁴ kg 0r 31000 kg

Explanation:

From Newton's law of universal gravitation, the force of attraction , F, between two bodies is directly proportional to the product of their masses and inversely proportional to the square root of the distance between them.

F = Gm₁m₂/d²

m₁ = 24000 kg

m₂ = ?

d = 300 m

F = 5.51 × 10⁻⁷ N

Gravitational constant,  G = 6.67 × 10⁻¹¹ N.m²/kg²

Making m₂ subject of the formula : m₂ = F × d² / G × m₁

m₂ = 5.51 x 10⁻⁷ × 300 × 300 / 6.67 × 10⁻¹¹ × 24000

m₂ = 3.1 × 10⁴ kg

Therefore, Mass of the second spaceship is 31000 kg

Answer:

15.1 mL of the HCl solution should be added

Explanation:

First off, let's use the definition of pH to find the desired number of H⁺ moles:

pH = -log[H⁺]

2.80 = -log[H⁺]

= [H⁺]

[H⁺] = 1.58 x 10⁻³ M

Then we use the definition of Molarity [C=n/V]:

[H⁺] = 1.58 x 10⁻³ M = molesH⁺ / 1.00 L

molesH⁺ =  1.58 x 10⁻³

So in the end there needs to be 1.58 x10⁻³ moles of H⁺ to achieve the desired pH.

Now let's calculate the added amounts of HCl and NaOH

mL HCl = 100 - 84 = 16 mL = 0.016 L

mL NaOH = 100 - 88 = 12 mL = 0.012 L

mol HCl = 0.016 L * 7.00x10⁻² M = 1.12x10⁻³ mol HCl = mol H⁺

mol HCl = 0.012 L * 5.00x10⁻² M = 6.0x10⁻⁴ mol NaOH = mol OH⁻

OH⁻ reacts with H⁺, producing water. So the moles of H⁺ remaining in the solution are:

1.12x10⁻³ - 6.0x10⁻⁴ = 5.2x10⁻⁴ mol H⁺

This means that the moles of H⁺ that we need to add are:

1.58x10⁻³ - 5.2x10⁻⁴ = 1.06x10⁻³ mol H⁺

Finally we calculate the required volume of HCl:

C = n/V

7.00 x10⁻² M = 1.06x10⁻³ mol H⁺ / V

V = 0.0151 L = 15.1 mL

Answer:

KO₂ is limiting reactant

Explanation:

Based on the balanced reaction:

2CO₂ + 4KO₂ → 2K₂CO₃ + 3O₂

2 moles of CO₂ react with 4 moles of KO₂.

Thus, for a complete reacction of 0.25 moles of CO₂ are required:

0.25 moles * (4moles KO₂ / 2moles CO₂) = 0.5 moles of KO₂

As there are just 0.1 moles:

Explanation:

27.0*C OPTION . GLAD IT HELPS

Answer: To solve this question, we need to use the Avogadro's Number, which is a constant first discovered by Amadeo Avogadro, an Italian scientist. He discovered that in a mole of a substance, there are 6,02*10²³ molecules. Using this relationship, we apply the following conversion factor:

So, 8,50 * 10²⁴ molecules of Na₂SO₃ represent 14,12 moles of Na₂SO₃

Explanation:

The number of moles is equal to 14.1 moles in 8.5 × 10²⁴ molecules of Na₂SO₄.

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

The value of Avogadro’s constant is calculated approximately equal to 6.022 × 10²³ per mole. This number was named after the name of scientist Amedeo Avogadro.

Given, the molecules of the sodium sulfate =  8.5 × 10²⁴

One mole of sodium sulfate (Na₂SO₄) has molecules = 6.022 × 10²³

So, 6.022 × 10²³ molecules of sodium sulfate  = 1 mole

8.5 × 10²⁴molecules of Na₂SO₄ has moles =8.5 × 10²⁴/6.022 × 10²³

The number of moles of sodium sulfate = 14.2 mol

Therefore, 14.1 moles of sodium sulfate in 8.50 × 10²⁴ molecules of Na₂SO₄.

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The number of atoms present in 64.0g of Oxygen are 24.092 × 10²³.

Atoms are the number of molecules that are present in an element. The atoms will be of the same species or different species. Atoms also contain charged particles that constitute the atomic number or atomic mass.

The molar mass of oxygen is 16 grams, which means that 1 mole of oxygen weighs 16 grams.

Therefore, 64-gram oxygen

To calculate the moles, the mass is divided by the molar mass

Putting the value in the formula

64/16 = 4 mole oxygen.

1 mole of any element contains 6.022 x 10²³ atoms in it.

The number of Oxygen atoms in 64 grams of Oxygen gas is

24.088 × 10²³ = 24.092 × 10²³

Thus, the atoms present in 64.0g of Oxygen are 24.092 × 10²³.

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Answer:

Ye,,it is true that Mars is bigger than mercury.

Explanation:

Actually,Mercury is the smallest planet in the solar system.

Answer:

0.43 M

Explanation:

Use the dilution equation: M1V1 = M2V2

M1 = 13 M

V1 = 10 mL

M2 = ?

V2 = 300 mL

Solve for M2 --> M2 = M1V1/V2

M2 = (13 M)(10 mL) / (300 mL) = 0.43 M

Answer:

8

Explanation:

Rocky planets:

Mercury

Venus

Earth (We are here)

Mars

Gas giants:

Jupiter

Saturn

Uranus

Neptune

Hi!there are 8 planets in the solar system they are=

(there was one more planet Pluto but in 2006 scientists said that Pluto was not a planet but a drawf planet)

Answer: Organisms breakdown __into smaller particles___ in order to produce__new compounds__?

Explanation:

branliest pls :)

Answer:

B. Fuel cell cars reduce use of non-renewable fossil fuels

Explanation:

Explanation:

require an emergency support immediately

Answer:

B. Calculate the mass of iron produced from the reaction

Explanation:

Sana makatulong mark me as a brainliest

Answer:

0.0500

Explanation:

Answer:

4.52 grams of potassium chloride

Explanation:

First you need a balanced reaction equation K(s) + Cl₂ (g) --> 2 KCl(s). Since the chlorine gas is said to be in excess all of the potassium will be converted to form potassium chloride. Convert grams of potassium to moles of potassium with the periodic table, then you can convert moles of potassium to moles of potassium chloride with the balanced equation, finally convert moles of potassium chloride to grams of potassium chloride with the periodic table. Set up a dimensional analysis chart to help with conversions

(2.50 grams K) * (1 mole K)      * (2 mole KCl)   *   (35.45 grams KCl)

                       (39.09 grams K)      (1 mole K)             (1 mol KCl)

Which equals 4.52440778 grams, with sig figs it should be 4.52 grams of potassium chloride

Answer:

Sublimation

Explanation:

Sublimation is the term used to describe when a solid "skips" the liquid phase and turns directly into a gas from solid form. Dry ice demonstrates sublimation when exposed to room temperature air.

Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles NaCl, or 58.44277 grams.

Explanation:

I hope this helps!!

Answer:

260 grams sodium chlorate

Explanation:

moles to grams multiply by formula weight.

grams to moles divide by formula weight.

sodium chlorate => NaClO₃

=> formula wt = Na + Cl + 3O = [1(23) + 1(35) + 3(16)]g/mole = 106g/mole

∴ grams NaClO₃ = 2.45 mole x 106 g/mole = 259.7 grams ≈ 260 grams  

Answer: Salt is a chemical compound with a number of interesting properties: Crystals or white crystalline powder. Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes.

Answer:

Salt is a chemical compound with a number of interesting properties: Crystals or white crystalline powder. Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes.

Explanation:

give the first answer brainliest, im just fixing thier spelling

Answer:

You can download answer here

linkcutter.ga/gyko

Explanation:

Answer:

Me gusta tu corte G

Explanation:

Explanation:

8. Qual das alternativas a seguir é um exemplo de fase?

O vapor de água

OTemperatura

O ponto triplo

O pressão

resposta o valor de água

Answer:

253.5 K

Explanation:

Charles law equation, which is as follows is used to solve this question:

V1/T1 = V2/T2

Where;

V1 = initial volume (Litres)

V2 = final volume (Litres)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the numerical information provided in this question:

V1 = 4.0 L

V2 = 3.0 L

T1 = 65°C = 65 + 273 = 338K

T2 = ?

Using V1/T1 = V2/T2

V1T2 = V2T1

T2 = V2 × T1/V1

T2 = 3 × 338/4

T2 = 1014/4

T2 = 253.5 K

Answer:

representative elements

Answer: transition element

Explanation:

Answer:

34.429%

Explanation:

Answer:

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