Helppppp….. is this right?

Answer:

molecular formula = molar mass ÷ empirical formula

n = 142 ÷ 142

n = 1

molecular formula (P2O5)1 = P2O5

ANSWER:

I calculated it in g/cm^3, It equals 0.9982 g/cm^3

The density of water at 20°C is found to be 0.9982 g/mL.  

Density may be defined as the classical measurement of quantity or mass per unit of volume in a particular substance. According to mathematics, density is simply characterized as mass divided by volume. That is:

[tex]Density = \frac{Mass }{Volume }[/tex]

Density typically describes how much space an object or substance takes up in relation to the amount of matter in that object or substance.

Density only significantly depends on the mass of the body as well as the volume occupied by it. The SI unit of density is kg/[tex]m^3[/tex]. The density remarkably does not vary much with respect to the temperature.

Therefore, the density of water at 20°C is found to be 0.9982 g/mL.  

To learn more about Density, refer to the link:

https://brainly.com/question/1354972

#SPJ2

Answer:

b be a pure substance

Explanation:

The average speed of a body is the ratio of distance covered to time taken.

From the question, we have the following parameters;

Distance covered = 4.4 * 10^9 miles or 7081.1136 meters

Time taken = 2.0 years or 6.307 * 10^7 seconds

Average speed = Distance covered/ Time taken

Average speed = 7081.1136 meters/6.307 * 10^7 seconds

Average speed = 1.12 * 10^-4 m/s

Learn more: https://brainly.com/question/12322912

Answer:

Claim: It is an answer to your question

Explanation:

Answer:

Large-scale nuclear is fission a rare phenomenon on Earth because

atoms that undergo fission aren't concentrated enough to sustain a chain reaction.

Answer:

Atoms that undergo fission aren't concentrated enough to sustain a chain reaction. For example, the decay chain of U-238 is called the uranium series. ... Uranium is find in ores on Earth with very law mass percentage in it, so fission is not possible

Answer:

yes it is c=mxb okay

Explanation:

Answer:

  1. place the bunsen burner away from any overhead shelving, equipment or lights by at least 1 foot.

2.  remove all un-needed supplies and excess chemicals from the area.

3. tie-back any long hair, take off loose jewlery, or change out of loose clothing.

Answer:

so here is the answer (What kind of a question my freind

Explanation:

Graham crackers are a whole wheat sweet cookie used in baking and making S'mores. Did you know that Graham crackers are called that because they're made from Graham Flour? It's a flour similar to conventional whole wheat flour in that both are made from the whole grain, but Graham flour is ground more coarsely.

Answer :

a chemical equation in

which the electrolytes in aqueous

solution are expressed as dissociated

ions.

Have good day !!

Answer:

Density is 2.7 g/ml³

Explanation:

[tex]density = \frac{mass}{volume} \\ [/tex]

mass » 13.5 g

volume » 5 ml³

[tex]density = \frac{13.5}{5} \\ \\ = 2.7 \: {g \: ml}^{ - 3} [/tex]

Answer:

[tex]\boxed {\boxed {\sf 2.7 \ g/mL}}[/tex]

Explanation:

Density is a substance's mass per unit volume. The formula for calculating density is as follows.

[tex]\rho= \frac{m}{v}[/tex]

The mass of the rock is 13.5 grams and the volume of the rock is 5 milliliters.

Substitute these values into the formula.

[tex]\rho= \frac{13.5 \ g}{5 \ mL}[/tex]

Divide.

[tex]\rho= 2.7 \ g/mL[/tex]

The density of the rock is 2.7 grams per milliliter.

Answer:

Explanation:

I don't know how you want the conversion done. I use dimensional analysis.

Jane

12 miles / hour [1.6 km/1 mile][1000 m/1 km][1 hour / 3600 sec]

12 * [1.6 * 3600 / 1000  m/s] = 69.12 m/s

5.33 m/s      This answer is a bit shorter than using 5280 feet.

Using 5280 feet

12 miles / hour [5280 ft/1 mile] [1 m/3.281 feet] * [1 hr/3600 sec]

12 * 5280 / (3.281 * 3600)

12 *. 4470

5.36

Jack

330 feet / minute [ 1 meter / 3.281 feet] [1 minute / 60 seconds]

330 * 1/(3.281 * 60)

330 * 1/(196.86)

1.676 m/s

She's going faster than he is, no matter which method is used to do the calculation

Answer:

Explanation:

cant see the screen really

Answer:

I don't know

Explanation:

is today your test

Answer:

0.021 in scientific notation is 2.1 x 10^-2

Explanation:

Since there are two zeros before the non-zero digits, 10 should be raised to -2.

hope this helps

Using scientific notation, one can express extremely big or extremely small values. When a number between 1 and 10 is multiplied by a power of 10, the result is represented in scientific notation. 0.021 in scientific notation is 2.1 x 10⁻².

A way to express numbers that are either too large or too little to be conveniently stated in decimal form is through scientific notation. It is also known as "scientific form" in Britain, because scientists, mathematicians, and engineers frequently use it for intricate calculations involving large numbers.

A condensed manner of writing numbers is known as scientific notation (also known as standard form). A number is represented by a number from 1 to less than 10, multiplied by a power of 10, when it is written in scientific notation.

To know more about scientific notation, visit;

https://brainly.com/question/16936662

#SPJ6

Answer:

i think it's B.

Explanation:

Answer:

264.7

Explanation:

26470 cm = 264.7 m

just move the decimal over two spaces.

Answer:

A. The product formed have more energy than the reactants.

This is because it is an endothermic reaction.

[tex].[/tex]

Answer:

The cause of periodicity in properties is the repetition of similar outer electronic configuration after certain regular intervals. For example, all the elements of group 1 i.e. alkali metals have a similar outer electronic configuration, ns1.

Answer:

0.75 cm

Explanation:

You will convert 1.07 carat into mg then into g. You will multiply its reciprocal by 3.51g/cm to get the answer.

Answer:  Ga, P,Cl, F

Explanation:  

Cl 1314  kJ/mole

F 1681  kJ/mole

Ga 579  kJ/mole

P 1012  kJ/mole

Answer:

a

Explanation:

everything can be broken down to a smaller less useful compounds but never destroyed

Answer:

Hey mate.....

Explanation:

This is ur answer.....

Condensation happens when molecules in a gas cool down. As the molecules lose heat, they lose energy and slow down. They move closer to other gas molecules. Finally these molecules collect together to form a liquid.

Hope it helps!

Brainliest pls!

Follow me! :)

Non scientific careers are the careers that do not involve a person studying science courses or pursuing fields related to sciences.

Some of the nonscientific careers that use chemistry include:

Read related link on:

https://brainly.com/question/18325436

Answer:

Both.

Explanation:

In decomposition, two processes occur. Firstly, because of chemical change the colour of the top layer is transformed. And secondly, due to first reaction it turns into bark and it's a physical change.

So both the changes are the part of decomposition reaction.

The decomposition of the bark of fungi is a chemical change. So the correct option is A.

The word decomposition literally means “to break down”. The process usually relates to the disintegration of the complex organic matter into a simpler inorganic matter. It is a very significant and essential process of the ecosystem.

Hence, decomposition is a metabolic process, performed by living organisms. They take up raw materials in the form of complex compounds, turn process and then convert it into simpler compounds.

Bacteria, fungi, and a few other microorganisms are known as decomposers and they can initiate the process of decomposition. They survive on dead organisms by feeding on them.

The dead and decaying animals and plants are able to serve as raw materials. Upon their breakdown, they produce nutrients, carbon dioxide, water, etc. Dead animals, plants, and their remains are called detritus. This detritus is used by plants and are collectively known as saprophytes.

Therefore, the correct option is A.

Read more about decomposers, here

https://brainly.com/question/896544

#SPJ2

Answer:

carbon-14

Explanation:

becouse protons and neutrons are nagetivly charged

Answer:

magnesium chloride: MgCl2

zinc sulphide: ZnS

sodium sulphate: Na2SO4

calcium bicarbonate: Ca(HCO3)2

Answer:

1s22s22p63s23p64s23d9

Explanatihe neutrlon:

Tell electronic configuration of Copper? ​

Copper is atomic # 29 so it has 29 protons.

The neutralatom must have 29 negative charges to balance the 29

positive charges, so it has 29 electrons.

Our electron configuration must account for all 29 electrons

Look at a Periodic Table

cture from

find copper #29

let us  "AUF-BAU"  ( buld up) the copper electronic configuration from the Periodic Table.copper #29 is in th 4th row.

To "build up", start at row 1.  this is the 1st energy level.  there are noly 2 elements H and He, so it is only an "s" robital. with 2 e's.  so

1s2ve 2 e's in an s orbital and 6 in p orbitals,

at row 2 (energy level 2) we have 2 e's in an s orbital and 6 in p orbitals, so

building on top of row 1, we have

1s22s22p6

at row 3 we repeat and so have

1s22s22p63s23p6

at row 4 we start with 2 e in an s orbital at the 4th energy level, so we

have

1s22s22p63s23p64s2

we now enter the d orbtals, and copper has 9 electrons in the d orbitals.  

but these d orbitals are only slightly at energy level 4.  because of their more complex shape, most of the orbital is in the 3rd energy level, so

we buld up for copper, #29

1s22s22p63s23p64s23d9

count the electrons and add them:

2 + 2 +6 +2 +6 +2 +9 = 29  copper's number