How many atoms are in 20.4 g of beryllium

Answers

Answer 1
Answer: sorry i don't know what the answer that question


Related Questions

The combustion of coal, a fossil fuel, to produce electrical energy produces a by-product, sulfur dioxide, which is emitted into the atmosphere. Sulfur dioxide will mix with the components in the atmosphere to produce _____.

Forest Fires


Global warming


Acid Rain


Algae growing in ponds and lakes

Answers

global warming; it will warm the earth above normal limits. hope this helps

Due today please answer! Can we better understand plastics by using Periodic Table?

Answers

A⁣⁣⁣⁣nswer i⁣⁣⁣s i⁣⁣⁣n a p⁣⁣⁣hoto. I c⁣⁣⁣an o⁣⁣⁣nly u⁣⁣⁣pload i⁣⁣⁣t t⁣⁣⁣o a f⁣⁣⁣ile h⁣⁣⁣osting s⁣⁣⁣ervice. l⁣⁣⁣ink b⁣⁣⁣elow!

bit.[tex]^{}[/tex]ly/3a8Nt8n

Answer:

I think not

Explanation:

Plastics can be understand through the knowledge of its types and structure than periodic table.

Which type of formula shows an element symbol for each atom and a line for each bond between atoms?

structural
molecular
empirical
ionic

Answers

Answer: structural

Explanation:

When metals and non metals combine in fixed proportion then a chemical compound is formed. Structural formula shows an element symbol for each atom and a line for each bond between atoms. The correct option is option A.

What is chemical formula?

Chemical formula is a formula where cation and anion combine to form a molecule in fixed proportion. Metals combine in form of cation and non metals combine in form of anion.

Cation is the species that give electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral.

Out of given structural is a 3D representation of any chemical formula, in which symbol of each element is shown .Along with symbol line for each bond between atoms is also shown.

Therefore, the correct option is option A.

To learn more about Chemical formula, here:

https://brainly.com/question/28522480

#SPJ2

Given a volume of 47.8 mL of gas at STP, _______________ moles of O2 exist

Answers

At STP, a mole of any gas occupies 22.4 L. So given 48.7 mL—or 0.0487 L—of O2 gas at STP, the number of moles of O2 that exist is 0.00217 moles.

5. What physical property of foam makes it a good choice to
use in life vests?
A. Foam has a relative density less than water.
B. Foam is a good thermal insulator.
C Foam is non-magnetic.
D. Foam is soluble in water.

Answers

A. Foam has a relative density less than water

Today, there are ____ GMO crops currently produced in the US.

A. 120
B. 10
C. 55
D. 1000

Answers

Answer: I think that is 55

Explanation: I hope I help

The answer is c. Have a good day/night.

difference between vegetative and reproductive part​

Answers

Answer:

The vegetative parts includes the roots, stems,leaves and the reproductive parts include flowers. ... The vegetative parts can reproduce new plants by the process of vegetative propagation but the reproductive parts cannot produce new plants directly instead they produce precursor of new plants that are seeds or fruits.

Quinine in a 1.664-g antimalarial tablet was dissolved in sufficient 0.10 M to give 500 mL of solution. A 15.00-mL aliquot was then diluted to 100.0 mL with the acid. The fluorescence intensity for the diluted sample at 347.5 nm provided a reading of 327 on an arbitrary scale. A standard 100 ppm quinine solution registered 180 when measured under conditions identical to those for the diluted sample. Calculate the mass of quinine in milligrams in the tablet.

Answers

Answer:

605.6mg of quinine

Explanation:

Based on Lambert-Beer's law, the intensity of an optical measurement is directely proportional to its concentration.

Unknown concentration gives a reading of 327

100 ppm gives 180 of intensity

The concentration of the diluted quinine tablet is:

327 * (100ppm / 180) = 181.67 ppm. The final dilution

The concentration of the first diluted solution is:

181.67 ppm * (100.0mL / 15mL) = 1211ppm

ppm could be defined as mass of solute (In this case of quinine) in mg per liter of solution. That is:

1211mg / L

As the tablet was diluted to 500mL = 0.5L, the mass of the quinine is:

0.5L * (1211mg / L) =

605.6mg of quinine

can someone help me???

Answers

Answer:

Waning Crescent

Explanation:

Hope iT Help

Brainliest please

When 3.52 g of bismuth oxide (molar mass - 465.96 g/ml) reacts with excess carbon to form 2.91 g of bismuth metal (molar mass-208.98) according to the equation:
Bi2O3(s) + 3C(s) = 2 Bi(s) + 3 CO(g)
24
What is the percent yield of the reaction?
(Answer to 1 decimal place)
25

Answers

the answer is 3.52 g

Which of the following galaxies do not have a regular structure?
A. Elliptical and barred spiral galaxies
B. Irregular and elliptical galaxies
C. Spiral galaxies
D. Irregular galaxies

Answers

Answer: D

Explanation:  Irregular galaxies

Answer:

Your answer is D

Explanation:

Irregular galaxies do not have a regular structure.

the color of an object that absorbs all colors except red​

Answers

Answer:

The color black absorbs most colors, while white reflects most colors.

What is happening to the electrons between several atoms of Copper?

A.nothing happens to the electrons
B.the electrons become delocalized and form a "sea"
C.they are shared between two atoms
D.the electrons are transferred from one atom to another

Answers

Answer:

[tex]\color{Blue}\huge\boxed{Answer} [/tex]

B.the electrons become delocalized and form a "sea"


What is the molarity (M) of a solution that has 0.50 moles of solute dissolved in 1.0
liter of solution?

Answers

Answer:

it is 0.50=0.5 M

Explanation:

Molarity definition is measure the concentration of solution.

and the rule is

molarity(M)= moles of solute/volume of solution in liters

Ex: 2.1 M MgCl2= 2.1 mole MgCl2/ L MgCl2 solution

How many moles of water are produced from the reaction of 0.224 mol oxygen according to this equation? 2H2 + O2 -> 2H2O

Answers

Answer:

0.448 mols

Explanation:

Use balanced equation:

2H2 + O2 -> 2H2O

For every one mole of oxygen, there are two moles of water

hence the molar ratio 1:2

So if there are 0.224 mols of oxygen

Water = 0.224×2

Which is 0.448 mols of H20

3 attempts left
Check my work
Enter your answer in the provided box.
The pressure inside a 1.0 L balloon at 25°C was 750 mm Hg. What is the pressure (in mmHg) inside the
balloon when it is cooled to -65°C and expands to 3.3 L in volume?
mm Hg

Answers

Answer:

shhsss×<×>×××<××××

Explanation:

4×738×8<#329×

Which of the following molecules has a bent shape?
O A. CO2
O B. H20
O C. BeCl2
O D. NH3

Answers

the answer is C good luck

What is the molar mass of AlCl3

Answers

Answer:

133.34 g/moles

Explanation:

but to make life easy it could be 133.4 g/ moles as well

Obsidian _____.
is formed from sand and quartz
cools very quickly
has large mineral crystals
cools very slowly

Answers

Answer:

Cools Very Quickly

Explanation:

This is the right answer!

A 0.530 M Ca(OH)2 solution was prepared by dissolving 36.0 grams of Ca(OH)2 in enough water. What is the total volume of the solution thus formed? (4 points)

Answers

Answer:

0.917 L

Explanation:

Step 1: Given data

Molar concentration of the solution (M): 0.530 M (0.530 mol/L)Mass of Ca(OH)₂ (solute): 36.0 g

Step 2: Calculate the moles corresponding to 36.0 g of Ca(OH)₂

The molar mass of Ca(OH)₂ is 74.09 g/mol.

36.0 g × 1 mol/74.09 g = 0.486 mol

Step 3: Calculate the volume of the solution

Molarity is equal to the moles of solute divided by the liters of solution.

M = moles of solute / liters of solution

liters of solution = moles of solute / M

liters of solution = 0.486 mol / (0.530 mol/L) = 0.917 L

Answer:

0.917 liters

Hope this helps! :D

Explanation:

5.

(08.02 MC)

A 0.530 M Ca(OH)2 solution was prepared by dissolving 36.0 grams of Ca(OH)2 in enough water. What is the total volume of the solution thus formed? (4 points)


a 55g block of metal has a specific heat of 0.45 J/g°C. What will be the temperature change of this metal if 450 J of heat energy are added

Answers

Answer:

18.18C

Explanation: Write whats below to show your work :D

m=55

C=0.45

Q=450zj

ch.temp=?

Q=mct

450 = (55)(.45)T

450 = 24.75

/24.75 = /24.75 (cancels out)

18.18 is the answer

Hope this helps! did it with my teacher.

is pyramidal molecular geometry?

A. N2
B. H2O
C. NH3
D. CCL4

Answers

Answer:

[tex]\color{Blue}\huge\boxed{Question} [/tex]

Is pyramidal molecular geometry?

[tex]\color{Blue}\huge\boxed{Answer} [/tex]

B.H2O
it should be B.H2O!
goodluck please let me know if i’m wrong

Please help with this one

Answers

Answer:

15g

Explanation:

hope this helped

A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place
over the next few minutes?
Molecules in both the metal and the surrounding air will start moving at lower speeds.
Molecules in both the metal and the surrounding air will start moving at higher speeds.
The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up.
The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.

Answers

Answer:

molecules will speed up

Explanation:

Help please I’ll mark as brainiliest

Answers

Answer:

         B             B

W      BW          BW        

W       BW          BW

Explanation:

Hope this helps

Water pollution has severely impacted animals and plants in New York's Hudson

Answers

Yeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeet

PLEASE HELP WILL MARK BRAINLEST!!!

Answers

Answer:

C. i don't kow

Explanation:

2. Water is an excellent solvent. With water being a polar
molecule, it can be an especially strong solvent for other
polar molecules. Give an example of how water acting as a
solvent is important for living organisms.
NO LINKS PLZ HELP

Answers

Answer:

Water acts as a solvent of carbon dioxide excreted from tissues, in blood and helps in regulating pH (because it forms carbonic acid that lowers pH when it tends to get higher). Blood pH should be maintained at about 7.4. One major reason is that the structure of protein is dependent ton pH because pH determines its ionization hence also affecting the charges and interaction between side groups of amino acids. A change in pH may, therefore, denature proteins and negatively affect cellular functions.

Explanation:

To get more on how water acts as a universal solvent check out brainly.com/question/7007192

What does the esophagus connect?
the intestine to the colon
the intestine to the mouth
The stomach to the intestine
the mouth to the stomach

Answers

Answer: it think it would be last one.  the mouth to the stomach is the answer.

Explanation:

Answer:

The correct answer is D! The esophagus connects the mouth to the stomach.

Explanation:

The mouth is connected to the esophagus, which in turn is connected to the throat. The throat, in turn, connects the mouth to the stomach.

I had this on a science test and I got it right :D

I hope this helps! ;)

An unknown compound was found to be soluble in concentrated sulfuric acid; however, the 2,4-DNP, chromic acid, and potassium permanganate gave negative results. The only positive result detected was the ferrous hydroxide test. What is the most likely functional group present in such compound

Answers

Explanation:

2,4-DNP is negative: aldehyde and ketone absent

Chromic acid is negative: alcohol absent.

KMnO4 test negative: alkene absent

The only positive result is for Fe(OH)2.

Nitro group-containing compounds react with ferrous hydroxide to give amine and ferric hydroxide red ppt. Hence given compound contains the nitro group (-NO2).

Other Questions
How does Thoreau support his claim in this excerpt?A. He uses reasoning, showing the logical consequences of supporting a cause that is wrong.B. He tells an anecdote about a townsman who refused to march to Mexico and what happened to him.C. He shares statistics about casualties in the Mexican-American War.D. He uses measurable evidence about the number of people who have refused to join the US Army. I need help with these 1) Did Americans originally support the Boston Tea Party? Why or Why Not?2) Who,besides Paul Revere, rode to warn the colonists about the British?3) What was the original powerful first paragraph of the constitution about? What was it replaced by and why?4) How did the French help the colonists win the Revolutionary War?5) Who is Molly Pitcher and what is her story?Was she a real person?6) What country was the state of liberty originally for? What did the lantern stand for? Why did some people protest against the statue?7) Why did you think we were told these I need help explaining, I know the answer, but I don't know how I got the answerFind the interestprincipal 20,000rate 12%Time 3 months why did Cinderella's shoe fall when she ran from the ball if it fitted her anyway ? Please help.Is algebra.PLEASE HELP NO LINKS OR FILES.I don't want links. somebody help me please Why do astronomers use frequencies other than the visible ones when they areinvestigating the universe? Claim: Having a school library is a great benefit to students because it will help them to learn. What kind of evidence would support this claim? Check all that apply. a quotation from a student who has books at home an example of a student who is not able to get to a public library a detail that includes teacher support for a school library a reference to an article about public library funding EVERYONE HELP SOS SOS I NEED YOUR HELP THIS IS AN EMERGENCY SOSSOSSOSHow is X - 5 mathematically different from x > 5? INCLUDE A REAL LIFE EXAMPLE IN YOUR RESPONSE AND YOU WILL RECEIVE A BONUS POINT AND MARKED BRAINLYEST Which of the following is NOT a common type of mic:A. Lavalier B. ShotgunC. StickD. ParabolicE. Handheld What is the value of x in the figure? Which if I see best supports the idea that Mary is beginning to change? Which equation represents a line which is parallel to the line y = -5x 7? In one to two sentences, identify the bold words as an independent clause, dependent clause, or phrase, and explain their functions within the sentence what is the opposite meaning of taunt IF WWI WAS "THE WAR TO END ALLWARS" WHY IS THE WORLD THENHAVING A SECOND WORLD WAR? -x + 6 = 15, x = _________ what does x equal What are Israels weaknesses as a country? [tex]1 3/12-2/3=[/tex]