ASAP, the diagram shows the electron arrangement…

Which element does not form an covalent bond

Answer:

4.8 grams

Explanation:

Use PV=nRT

P: 775 mmHg (divide by 760 mmHg to get atm)  -> 1.02 atm

V: 3700 mL (divide by 1000 to get L)  -> 3.7L

n: ?

R: (a constant) 0.0821L * atm/k *mol

T: 33 C (add 273 to get K)  -> 306K

Move equation so n is on the side: PV/RT = n. Plug the numbers into the equation.

[tex]\frac{1.02atm * 3.7L }{306K} * \frac{K * mol}{0.0821L *atm} = 0.15 mol[/tex]

Then, convert moles to grams using the molar mass of O2 which is 32g/mol.

[tex]0.15 mol * \frac{32g}{mol}[/tex]= 4.8g

4.8g is the mass of oxygen gas which are in a 3700 mL container at a pressure of 775 mmHg at 33oC.

A body's mass is an inherent quality. Prior to the discoveries of the atom as well as particle physics, it was widely considered to be tied to the amount of matter of a physical body. It was discovered that, despite having the same quantity of matter in theory, different atoms and elementary particles have varied masses.

There are various conceptions of mass in contemporary physics that are theoretically different but physically equivalent. The resistance of the body to accelerate (change of velocity) in the presence of a net force can be measured experimentally as mass.

PV=nRT

P= 775 mmHg/760 = 1.02 atm

V=3700 mL/1000 = 3.7L

n=

R=0.0821L× atm/k ×mol

T=33 C + 273=306K

1.02×3.7/0.0821×306= n

n=0.15 moles

mass = 0.15×32=4.8g

Therefore, 4.8g is the mass of oxygen.

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Answer:

false

Explanation:

This is false. The order is:

Domain

Kingdom

Phylum

Class

Order

Family

Genus

Species

As you can see, kingdom is actually the second largest group in which a living thing can be classified into therefore it is false.

Answer: a rock being in one place over a long time and eventually wearing away

Explanation:

:)

The glass containing the effervescence tablet has a greater air space than the other.

The term effervescence refers to the evolution of a gas. An effervescence tablet is a tablet that is designed to release the gas called carbon dioxide.

When we add the effervescence tablet and compare the level of the water in the two bowls, we will see that the water in the glass containing the effervescence tablet has a greater air space than the other.

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Answer:

C

Explanation:

Runoff occurs when there is more water than land can absorb so  it would be C.

Answer:

A

Explanation:

The sun heats up earths surface

Reactivity.

All the others are examples of a physical property.

For preparing a NaCl solution with a total volume of 50 ml, the best glassware to use would be a graduated cylinder.

Graduated cylinders are designed with clear and precise volume markings along their sides, allowing for accurate measurements of liquids.

With a 50 ml target volume, a graduated cylinder provides the necessary precision for measuring and mixing the correct amount of NaCl and solvent (usually water).

This glassware minimizes measurement errors and ensures the desired concentration of the solution. Its straightforward design and ease of use make the graduated cylinder a practical choice for small-volume solution preparation tasks.

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Answer:
B. 297.1
Explanation:
To fond molar mass you just add the atomic
masses together however many ttimes they appear. Eg. BaBr2 would be 137.33 + 2(79.9)

In order to determine the mole ratio, you need to begin with a balanced chemical equation.

Answer:

2n² is a formula that determines that the maximum number of electrons should be accommodated in a particular shell.

Explanation:

From the formula unit of potassium carbonate, there are two potassium ions and one carbonate ion.

The term formula unit refers to the smallest unit in an ionic compound. It shows the ratio of the ions in the compound. For potassium carbonate, the formula unit is K2CO3.

From this formula unit, we can see that there are two potassium ions and one carbonate ion.

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Answer:

50km per hour.

Part of the speed, distance, time triangle.

To get speed, just divide distance by time. 150/3=50

This is typically done by dividing by the molar mass of the known, so the correct answer is B) divide by the molar mass of the known.

What is Molar Mass?

Molar mass is the mass of one mole of a substance. It is usually expressed in grams per mole (g/mol). The molar mass of a compound is determined by summing the atomic masses of all the atoms in the compound's chemical formula. The molar mass of an element is simply the atomic mass of that element. Molar mass is an important concept in chemistry because it allows us to easily convert between the mass of a substance and the number of moles of that substance, and thus to perform calculations involving chemical reactions and stoichiometry.

When solving a mass to mass problem, the first step after balancing the equation is to determine the given quantity and convert it to moles. This is typically done by dividing the given mass by the molar mass of the substance.

Once the given quantity is converted to moles, the mole ratio between the given substance and the unknown substance is determined by examining the coefficients in the balanced chemical equation. This ratio is used to convert the moles of the given substance to moles of the unknown substance.

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Avogadro's number

1 mole = 6.02.10²³ particles (atoms, molecules, ions)

[tex]\tt 1.87\times 10^{24}\div 6.02\times 10^{23}=\boxed{\bold{3.11~moles}}[/tex]

One mole of copper contains 6.02 × 10²³ copper atoms. Therefore, the number of moles that contains 1.87 ×10²⁴ copper atoms is 3.1 moles.

The number of atoms that constitutes one mole of a substance is called Avogadro number. It is equal to  6.02 × 10²³. Thus, one mole of every elements contains Avogadro number of atoms.

Similarly, one mole of a compound contains  6.02 × 10²³ number of molecules. Thus, one mole of carbon dioxide contains these much molecules.

Given the number of atoms of copper = 1.87 ×10²⁴

Then, no.of moles = number of atoms/ Avogadro number.

no.of moles =1.87 ×10²⁴ /6.022 × 10²³  = 3.1 moles.

Therefore, the number of moles of copper that contains 1.87 ×10²⁴ atoms is 3.1

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Answer:

Sound waves are faster than light waves when traveling through the air.

(This statement is NOT true)

or

Sound waves and electromagnetic waves are both needed to talk on a cell phone

Explanation:

Sound waves need a medium to travel through, but light does not.

Also, the statement "Sound waves and electromagnetic waves are both needed to talk on a cell phone" might also be NOT true, since, as far as I know, cellphone calls need radio and sound waves, not electromagnetic waves.

A hot filtration should be used in the process of Crystallization.

This is the conversion of a chemical in liquid form to a crystalline solid. The crystal formed are repeating three-dimensional pattern or lattice.

Hot filtration is used in the process of Crystallization of a solid which contains impurities that are insoluble in the crystallization solvent and also to remove highly colored impurities from a solid.

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Answer: (1,3-dimethylbutyl) acetate

Explanation:

sorry if it wrong

(1,3-dimethylbutyl) acetate is the product from the reaction of sulfuric acid acetic acid and 1 pentanol.

Acetic acid is called as ethanoic acid found in many different products main component of vinegar, supply in the ingredients like apple cider vinegar.

It has a Chemical formula [tex]\rm C_2H_4O_2[/tex] can also be written as [tex]\rm CH_3COOH[/tex] or [tex]\rm CH_3CO_2H[/tex]. As it contain a carbon atom in the acetic acid structure, is considered an organic compound.

Acetic acid is a colorless liquid with strong and pungent smell. The undiluted form of acetic acid or ethanoic acid is known as glacial acetic acid.

Although Acetic acid is a weak acid but its concentrated form is act as a corrosive substance and can cause some damage to the skin. It can be used for manufacture of  acetic anhydride, cellulose acetate, acetic esters, plastics, dyes, etc.

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They combine to form water

A neutralisation reaction is a type of chemical reaction whereby an acid and base reacts in an aqueous solution

to form salt and water only.

For example, the acid HCl reacts with the base NaOH to give salt (NaCl) and water (H2O).

Positive sodium ions from NaOH and negative chloride ions from HCL combine to form the salt sodium chloride (NaCl).

While the H+ from the acid and OH− from base combine to form water.

Therefore, when HCl and NaOH react in an aqueous solution the H+ and OH− combine to form water.

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The formula for percent yield is:

(experimental ÷ theoretical) × 100%

Simply input the numbers into this formula and you will get your answer.

percent yield = (112.9 ÷ 137.5) × 100%

percent yield = 82.10909091 (round as you wish)

percent yield = 82.11%

Answer:

The big bang happened

Explanation:

Since the Big Bang, the universe has been expanding. In the early years, everything was made of gas. This gas, mostly hydrogen and helium, expanded and cooled. Over billions of years, gravity caused gas and dust to form galaxies, stars , planets, and more. The matter that spread out from the Big Bang developed into everything in the universe, including you. You are made of star stuff!

Answer:

The Big Bang Theory states that the Universe began in a single "explosion," or inflation event from which all of matter-energy and space-time took form. The latest estimates pinpoint this inception moment to have occurred about 13.8 billion years ago.

Explanation:

Big Bang theory

The pH of lemon juice has a hydrogen ion concentration of 0. 01 moles per liter is 2.

pH is the measurement of acidity and basicity of any solution. The meaning of pH is potential hydrogen.

The acidity or basicity of any solution can be measured by pH scale, which is from 0 to 14.

The pH for neutral is 7 which is of pure water

The pH above 7 is base and pH below 7 is acids.

Thus, the pH of Lemon juice is 2.

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Explanation:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CO2, or 44.0095 grams.

I hope you help:)

There are 158.4 grams of CO2 in 3.6 mol of CO2.

The mass of a substance can be calculated by multiplying the number of moles of the substance by its molar mass. That is;

mass of CO2 = no. of moles × molar mass

According to this question, there are 3.6 moles of CO2.

mass of CO2 = 3.6 moles × 44g/mol

mass of CO2 = 158.4g.

Therefore, there are 158.4 grams of CO2 in 3.6 mol of CO2

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Answer:

your answer is

Exposure to CO2 can produce a variety of health effects.CO can cause dizziness, confusion, unconsciousness and death.--development of asthma and potentially increase susceptibility to respiratory infections

hope it helps you Buddy

Explanation:

~Zayn

Answer:

problem I think.

Hope this helps.

The amount of heat required is 19219.2 J

Mass = mole × molar mass

Mass of nitrogen = 3 × 28

Mass of nitrogen = 84 g

Q = MCΔT

Q = 84 × 1.040 × 220

Q = 19219.2 J

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Based on recommended amount of carbohydrate, a basketball player should consume about 17 - 34 ounces of gatorade g series during the hour-long game.

Carbohydrates are food substances metabolized easily by the body to produce energy.

Given that the recommended amount of carbohydrate to consume to maintain performance is 30–60 g/h.

Also 14 grams of carbohydrate found in 8 ounces of the drink.

30 g of carbohydrate will be present in 30 × 8/14 = 17.1 ounces of gatorade g series

60 g of carbohydrate will be present in 60 × 8/14 =34.3 ounces of gatorade g series.

Therefore, a basketball player should consume about 17 - 34 ounces of gatorade g series during the hour-long game.

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