How many moles are there in 8.25 x 10^26 molecules of methane (CH4)?

Answers

Answer 1

Answer:

i dont know

Explanation:

because i dont know 45


Related Questions

Calculate the number of moles of 2.00g of K2SO4

Answers

2.00g K2SO4 * (1 mol K2SO4 /174.56g K2SO4) = 0.0115 mol K2SO4

Which of the following represents alpha decay?

Answers

Answer: b

Explanation: alpha decay or particle consist of two protons and two neutrons hence it is a helium nucleus.

An alpha particle [tex]\binom {4} {2}[/tex]He is produced in alpha decay reactions, while the parent nucleus' atomic number and mass number drop by 2 and 4 correspondingly.

Alpha decay:

Alpha decay is a nuclear process whereby an unstable nuclear transforms into a different element by ejecting particles composed of two protons and two neutrons. The alpha particle also referred to as a helium nucleus, is the expelled unit of matter. Alpha particles have large masses and electrostatic attraction.An atomic number decreases by 2 and the atomic weight drops by 4 when a radioactive nucleus disintegrates by emitting [tex]\bold{\alpha}[/tex] particle.

Therefore, the final answer is "Option B".

Find out more about the alpha decay here:

brainly.com/question/14081292

The air we breathe contains different individual gases (mostly nitrogen and oxygen). Which of the following correctly describes the air we breathe?
A. homogeneous mixture
B. compound
C. heterogeneous mixture
D. element

Answers

A. Homogeneous mixture
A.) homogenous mixture

Why are shadows shorter around noon?
Make sure you give a full, detailed answer, not just one sentence.

Answers

Answer: Answer is in the Explanation.

Explanation: At noon the sun is directly above in the sky, the sun's rays are falling on the body making the shadow smaller. While in the evenings and mornings the sun is at a inclined position, so the sun's rays are falling at a inclined position making the body's shadow larger.  

I looked it up on the internet and reworded it as good as I could.

subtracting atomic number from atomic mass will give the number of

Answers

Answer:

:)

Explanation:

If we subtract the atomic number from the atomic mass: atomic mass - atomic number = number of protons + number of neutrons - number of protons. Thus we get the number of neutrons present in an atom when we subtract the atomic number from the atomic mass.

up there is the answer

C
ot 헤
C.
Show that the results of these dulys
Calculate the oxidation state of Manganese in the following
i. KMnO4 ii. Mno4-

Answers

i) KMnO4

lets calculate using x method

1+x+ 4(-2) = 0

1+x-8 =0

x= 7

ii)MnO4‐

x+4(-2) = -1

x-8 = -1

x = 7

How much energy does a copper sample absorb as heat if its specific heat is 0.384 J/g.°C, its mass is 8.00 g, and it is
heated from 10.0°C to 40.0°C?

Answers

Answer:

.0016

Explanation:

For specific heat problems you use the formula :

Q = mcΔT

They've given you the m, c and delta T, so you can plug in those values. (for the temperature change subtract 10 from 40 to see that it grew 30 degrees)

You're looking for Q so leave that variable in the equation. Then solve.

.Q = (8.00)(.384)(30)

Q = 92.16

92.16 J energy will be absorbed by a copper sample.

Given:

Specific heat  capacity, C= 0.384 J/g °C

Temperature, T₁ = 10.0°C and T₂= 40.0°C

Mass, m=8.00 g

We know that,

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (g) of the material when its temperature increases or 1 °C, and its unit is J/g °C.

Heat energy in terms of specific heat energy can be calculated by using this formula:

Q= m. C. ΔT

∵ΔT= change in temperature,

ΔT=40.0-10.0°C=30°C

Now substituting the values in the above formula.

[tex]Q= 8.0*0.384*30=92.16J[/tex]

Hence, 92.16 J energy will be absorbed by a copper sample.

Learn more:

brainly.com/question/22991121

Please help is for my final An example of a chemical change is-
evaporation of seawater
о
sublimation of dry ice (CO2)
melting of aluminum
burning wood reducing it to ashes

Answers

Explanation:

Souring of milk

Baking of cake

if (H+] = 10^-2 M
what will be pH = ?

Answers

pH = -log[H+]
pH = -log(10^-2)
pH = 2

What is the molar mass of H2S?
0 518
65.15 g
17 g
78.16 g
34.1g

Answers

H - 1
S - 32.1

(1*2) + 32 = 2 + 32.1 = 34.1

34.1 g is the answer

If you have 3 mol of glucose in 6 L of solution, what is the molarity of the
solution?

Answers

Answer:

0.5 M

Explanation:

Molarity = moles of solute / liters of solution

Copper (II) reacts with silver nitrate in a single displacement reaction. How many grams of copper are needed to react with 510 grams of silver nitrate?

Answers

To start with this is stoichiometry so you need a mol to mol ratio. But because you have grams and end in grams you need to convert from grams to mol using a conversion factor. I took a picture of my work below:

The answer is 95.39 g Cu

Need help. Will pay if needed, or give away points. CHEMISTRY

Answers

Answer:

C. So electrons can flow from one electrode to another

Explanation:

An electrochemical cell is any cell in which electricity is produced by reason of a chemical change.

An electrochemical cell consists of two electrodes, these two electrodes are connected using a wire.

Usually, electrons flow from one electrode to another via this wire thereby enabling the electrochemical processes of oxidation and reduction in the cell to proceed effectively.

How many ounces is 68 g?
O A. 0.42 oz
O B. 28.3 oz
O C. 4.8 oz
O D. 2.4 oz

Answers

Answer:

D

Explanation:

Which of the following can be used to measure an object's
speed?

Answers

Answer:

distance traveled divided by the time it traveled

Explanation

this is just an equation for how to find speed. you can also just use like a meterstick and a stopwatch

Identify the two acids and the two bases out of the 5 chemicals below: NaOH/ HCI /H2SO4/ Ca(OH)2 /NaBr *​

Answers

Answer: NaOH and Ca(OH)2 are bases. HCl and H2SO4 are acids

Explanation:

Zinc reacts with Copper (II) chloride to produce Copper and Zinc chloride. -write chemical formula​

Answers

Answer:

here's the answer hope it helps

I need help with this…and can you so the work if you can!!

Answers

Answer:

88 grams CO2

Explanation:

Convert from grams to moles to mole ratio to grams again

32 g CH4 * 1 mol CH4/16 g CH4 * 1 mol CO2/1 mol CH4 * 44 grams CO2 = 88 grams CO2

Lemme know if u need more explanation!

What are surface currents? What drives them?

Answers

Answer:

Surface currents in the ocean are driven by global wind systems that are fueled by energy from the sun. Patterns of surface currents are determined by wind direction, Coriolis forces from the Earth's rotation, and the position of landforms that interact with the currents

6. What is the atomic number of the element?
7. How many neutrons does this element have?
8. What is the atomic mass of this element?
9. How many electrons does this element have?

Answers

Answer:

For O: atomic number = 8 # neutrons = 8

For Al: atomic mass = 27, # electrons = 13

Which best describes the purpose of a fever?

Answers

Answer:

when you have a fever your body is trying to fight off a virus or some other kind of bad Bacteria  

Explanation:

I think this because everyone has at least had a fever when they were sick and when you are sick you are likely to have a fever because your body is fighting off a bad bacteria  

Which expression represents the pH of a solution?

Answers

Answer:

pH = 14 - pOH

pH = -log[H+]

pH = pKa + log [A-]/[HA]

Explanation:

The equation used depends on what is given in the equation.

The expression that represent the pH of the solution is

pH = 14 - pOH

pH = -log[H+]

pH = pKa + log [A-]/[HA]

What is the pH of the solution?

It is the quantitative measure related to the acidity or the other liquid solutions. It should be range between the 1 and 10^-14. here the numbers be like from 0 to 14.

Hence, we can say that The expression that represent the pH of the solution is

pH = 14 - pOH

pH = -log[H+]

pH = pKa + log [A-]/[HA]

Learn more about pH here: https://brainly.com/question/12052751

Pls help on test (no old answers OR files)


During a combustion reaction, 9.00 grams of oxygen reacted with 3.00 grams of CH4.

What is the amount of the leftover reactant?

0.74 grams of methane
0.89 grams of methane
1.22 grams of oxygen
1.45 grams of oxygen

Answers

The answer is 1.22 grams of oxygen

How much of a 10 M solution is needed to make 1 liter of a 1M solution?
a. 1ml
b. 1000ml
c. 10ml
d. 100ml

Answers

i dont know I hope someone knows soon take care

According to molar concentration, 100 ml of 10 M solution is needed to make 1 liter of a 1 M solution.

What is molar concentration?

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.In case of two solutions, molar concentration is found out by, M₁V₁=M₂V₂.

On substitution in above formula, V₁=1×1/10=0.1 L=100 ml.

Thus, 100 ml  of a 10 M solution is needed to make 1 liter of a 1 M solution.

Learn more about molar concentration,here:

https://brainly.com/question/21841645

#SPJ2

why should Asus be stores only in the glass containers please answer this ​

Answers

Answer:

Do you mean acids?

Due to chemical reaction

Explanation:

Acids are only stored in glass containers because glass containers rarely react with any substance.They dont react with acids and prevent chemical reaction so the acids can be kept. If acids were kept in metal containers it would react .

I'm just straight confused by it​

Answers

Answer:

B

Explanation:

(Usually give an explanation, but doing an exam, so just trust)

List ways on how to lessen human impacts in the environment

Answers

Answer:

Explanation:

Completely turn off equipment like televisions and stereos when you're not using them.

Choose energy-efficient appliances and light bulbs.

Save water.  

Lower your shades or close your curtains on hot days, to keep the house cool and reduce the use of electric fans or air-conditioning.

Let clothes dry naturally.

Keep lids on pans when cooking to conserve energy.

Use rechargeable batteries.

Don’t use “throw away” products like paper plates and napkins, or plastic knives, forks and cups.

Send electronic greetings over email, instead of paper cards.

20. Calculate the volume of 847 g of SO2 gas at a pressure of 89.4 kPa and 40 °C.
JUST NEED THIS LAST ONE SOMEONE HELP ME ITS DUE SOON

Answers

Answer:

243L of SO2

Explanation:

You'll want to use the Ideal Gas Law for this problem.

First, determine your formula. V=nRT/P

Next, determine your factors.

V = ?

n = 847g

R = 0.0821L.atm/mol.k

T = 313k (40+273)

P = 89.4kPa

Now just plug it in!

847g x 313k / 89.4kPa  x  0.0821L.atm / mol. K

243L of SO2. Hope this helps!

what are the three method used to treat water ?​

Answers

Answer:

The three methods used to treat water are

Filtration SedimentationDistillation

Explanation:

These methods used include physical processes, biological processes such as slow sand filters or biologically active carbon; chemical processes such as flocculation and chlorination; and the use of electromagnetic radiation such as ultraviolet light.

Which process is represented by the label A?

Answers

Answer:

I believe its compaction

Explanation:

Compaction is how sedimentary rock is formedm

I think it’s weathering and erosion hmm..not sure tho
Other Questions
PLEASE ANSWER QUICKWhich nation did the United States invade as a part of its counterterrorism efforts? Iran Pakistan Afghanistan Iraq How to describe being underwater Indirect: Computing cash flows from operation Case X Case Y Case ZNet income $7,200 $180,000 $129,600 Depreciation expense 54,000 14,400 43,200 Accounts receivable increase (decrease) 72,000 36,000 (7,200) Inventory increase (decrease) (36,000) (18,000) 18,000 Accounts payable increase (decrease) 43,200 (39,600 ) 25,200 Accrued liabilities increase (decrease) (79,200 ) 21,600 (14,400)For each of the above separate cases X, Y, and Z, compute cash flows from operations using the indirect method. can someone give me a short summary on Gorbachev and Perestroika plz According to "Making Money," why must designers create the appearance of paper money before engravers can do their jobs? Engravers arrange several "identical printing plates," so that a design can be created on each one. Engraving requires the use of "green and black as well as metallic and color-shifting inks," which designers create in their labs. Engraving is the "cutting of a design into a hard surface," so the design must be complete before engraving can occur. Engravers work on "steel forms called dies," which designers build with various carving tools. You are working on a ticketing system. A ticket costs $10. The office is running a discount campaign: each group of 5 people is getting a discount, which is determined by the age of the youngest person in the group. You need to create a program that takes the ages of all 5 people as input and outputs the total price of the tickets. Sample input: 55 28 15 38 63 sample output: 42.5 the youngest age is 15, so the group gets a 15% discount from the total price, which is $50 - 15% = $42.5 identify the processes used in open cast mining Which are elements and geographical skills in which can be applied in one's life as practical or professional? HELPA rectangular prism can be filled with 210 half-inch cubes. How many 1/4inch cubes does it take to fill the same prism? will mark brainliest!!What does CPR stand for?A. Cardiopulmonary recoveryB. Cardiopulmonary resuscitationC. Critical pre-resuscitationD. Creative practical research Electricity is converted into other forms of _________ such as heat, sound, or light. what is the area of the triangle if the base is 5 centimeters and the height is 6 centimeters? (no links or bots please) South America is located entirely within what hemisphere Segun la mayoria de cientificos hace 13.800 millones de aos gracias al impulso de la explotacion de big bang dio oringe a la expasion del why economic freedom is important How many moles of hydrogen gasare produced when 3.8 moles of HCIare reacted?O 1.9 mol Which statement best defines reading fluently?Fluency is the ability to analyze a text and evaluate its argument.Fluency is the ability to understand a text and analyze its ideas.Fluency is the ability to read with appropriate pace, accuracy, and proper expression,Fluency is the ability to read in another language, with dramatic interpretationAnswer C Paraphrasing is important because__________________________________.it helps us copy informationit makes research harderit gives us choicesit helps us avoid copyingWILL MARK BRAINEST List the full alphabet backwards. I will give brainiest to the first person to answer, Simplify:8x4 3x 7 = [?]x=-1