How many moles are there in 135g of aluminum ?

Answers

Answer 1

Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Aluminium, or 26.981538 grams.


Related Questions

How do American cities now protect their water resources

Answers

They can use man made materials or they can also have designed areas that people can’t go into

Answer:

They can use man made materials or they can also have designed areas that people can’t go into

Explanation:

PLS HELP

In the balanced equation:


H3PO4(aq) + NH3(aq) ↔ X(aq) + NH4+(aq)



The particle represented by X(aq) is


A) H2PO4–(aq)

B) HPO42–(aq)

C) PO43–(aq)

D) H3PO4(aq)

Answers

Answer:

The particle represented by X(aq) is  A) H₂PO₄⁻(aq)

Explanation:

According to the Brønsted-Lowry Theory, a base is a substance capable of accepting protons (H⁺) in solution. Conversely, a substance acts as an acid if it acts as a proton donor.

A proton transfer then occurs, requiring the presence of a proton donor (an acid) and a base that accepts them.

When an acid gives up a proton, it becomes an anion, generating a conjugate base. That is, a conjugate base is an ion or molecule resulting from the acid that loses the proton. Conversely, a conjugated acid is an ion or molecule resulting from the base that the proton gains.

In this NH₃ / NH₄⁺ pair that NH₄⁺ is the conjugate acid of the NH₃ base, the latter acting as a base since it accepts a proton. H₃PO₄ then acts as an acid, yielding a proton and generating the conjugate base H₂PO₄⁻.

So, the particle represented by X(aq) is  A) H₂PO₄⁻(aq)

Sulfuric acid (H2SO4) has a molar mass of 98.1 g/mol. How many oxygen atoms are found in 75.0 g of H2SO4? A. 1.15 × 10^23 B. 1.84 × 10^24 C. 4.61 × 10^23 D. 7.87 × 10^23

Answers

Answer:

B

Explanation:

first find the no. Of moles of H2SO4

=  75/98.1

= 0.7645

Next step

In on mole of H2SO4 the no.of oxygen atom is 4.

1 H2SO4 : 4 O

0.7645  : x                     x= 0.7645x4= 3.0581

next multiply avogadros constant

3.0581 x 6.022× 10^23 =1.84x10^24

Mass present in 1 gram of mole substance is called molar mass. Molar mass is calculated by: dividing the mass of the compound in grams by the number of moles present in the substances.

The correct answer is:

option B. 1.84 × 10²⁴

Given,

The mass of sulfuric acid =75.0 g

The molar mass of sulfuric acid = 98.1 g/mol

1.The moles of sulfuric acid can be calculated by

M = m ÷ n

where M is molar mass, m is mass and n moles.

moles of sulfuric acid = mass ÷ molar mass

= 75 g ÷ 98.1 g/mol  

=0.7645 moles

Hence moles of sulfuric acid present is 0.7645 moles.

2. 1 mole of sulfuric acid = 4 oxygen atoms.

Then, 0.7645 moles of sulfuric will contain: 0.7645 × 4 = 3.0581 atoms of oxygen

3. Oxygen atoms present in 75.0 g of H₂SO₄ will be calculated by multiplying it with Avogadro's constant:

= 3.0581 x 6.022× 10²³

= 1.84x10²⁴

Therefore, 1.84 × 10²⁴ oxygen atoms will be found in 75.0 g of H₂SO₄.

To learn more about moles follow the given link:

https://brainly.com/question/20486415

10) Intravenous saline solutions have a concentration of 1.5 M NaCl. How many liters of saline can be prepared from 50.0 g of NaCl?

Answers

Answer:

0.57 mol/L

Explanation:

Molarity (M) is defined as the number of moles of solute per liter of solution (moles/Liter).

Molarity  =  [tex]\frac{moles of solute}{liters of solution}[/tex] or Moles  =  molarity × litres

so, the mass of Nacl in 1 mol is 58.44 g,

Moles of NaCl = 50.0g x 1 mole NaCl / 58.44 g

                          = 0.855 mol NaCl

Moles  =  molarity × litres

0.855 = 1.5 M x L

L = 0.57 mol/L

Hence, 0.57 mol/L can be prepared from 50.0 g of NaCl.

HELP CHEM ASAP!!!!!!

Answers

Answer:

0.132

Explanation:

is the only part i know

Identify three details for how the Earth and Moon are different

Answers

1. Earth can sustain life the moon cannot
2.Earth has oxygen moon does not.
3. Moon is not known to have life

Which phrase provides the best definition of mass movement?

the movement of material caused by erosion
the slow flow of a glacier as it moves through the valley of a mountain
the movement of large amounts of soil and rock debris down a slope
the fast movement of a boulder rolling down a slope

Answers

The movement of large amounts of soil and rock debris down a slope

Answer:

the movement of large amounts of soil and rock debris down a slope

Explanation:

yeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeetyeet

What happens to a neutral atom when an electron leaves

Answers

the atom becomes an ion

Question 2 options: The Galápagos tortoises are native to seven of the Galápagos Islands, a volcanic archipelago about 620 miles west of the Ecuadorian mainland. With lifespans in the wild of over ____________years, it is one of the longest-lived vertebrates. A captive individual lived at least ______________years!

Answers

Answers:

in the wild of over 100 years,...

A captive individual lived at least 255 years!

Explanation:

The giant Galapagos tortoises (Chelonoidis nigra) are famous because this species was observed by Darwin during his travel. This species is native from the Galapagos Islands and currently is in danger of extinction. Galapagos tortoises are recognized as one of the longest vertebrates. In this regard, it is worthy to note that a giant tortoise named Harriet lived 255 years, this specimen was in the Australian Zoo.

please help me please

Answers

Answer:

b

Explanation:

i read this once and remember,trust me!

Answer:

20 is b and 21 is a.

Look at these two molecular diagrams and think about the features of the compounds. (SEE PICTURE)

1. A chain of 5 C atoms is bonded to H above and below and to the left and the right, except that the 4th C is bonded to C H subscript 3 above instead of a plain H. 2. A chain of 4 C atoms is bonded to H above and below and to the left and the right, except the second C in the chain is bonded to C H subscript 3 above and below.

Which descriptions apply to these two compounds? Check all that apply.

are isomers of each other

have same molecular formula

have same structural formula

are both hydrocarbons

have same number of each kind of atom

have same geometric arrangement of atoms

Answers

Answer:

A, B, D, E

Explanation:

correct on Edge 2020

Answer:

1) are isomers of each other

2) are isomers of each other

4) are both hydrocarbons

5) have same number of each kind of atom

Explanation: edg 2020

How are renewable fuels different from fossil fuels

Answers

Answer:

Renewable energy

Explanation:

on the other hand, typically emits less CO2 than fossil fuels. In fact, renewables like solar and wind power—apart from construction and maintenance—don't emit any CO2 at all. With renewable energy, you can breathe easier, stay cooler, and create a more comfortable world for generations to come.

Answer:

renewable energy comes from natural resources that can be replenished or replaced during an average human lifetime ; eg, Hydro, solar, wind etc.

fossil fuels can take thousands or even millions of years to naturally replenish; eg, natural gas, coal, oil.

Sarah, Leah, Haley, Lindsay, and Kim bought 4 bottles of water to share among themselves. They divided each bottle of water into 5 equal portions. Sarah took 1 portion from each bottle of water.

Answers

Answer:

4/5 of a bottle

Explanation:

Sarah, Leah, Haley, Lindsay, and Kim bought 4 bottles of water to share among themselves. They divided each bottle of water into 5 equal portions. Sarah took 1 portion from each bottle of water. Which equation represents how much of a bottle of water Sarah took?

Sarah must have taken 4/5 of a bottle

First, the 4 bottles of water were divided into 5 equal portions;

4 x 5 = 20 portions.

Sara too 1 portion from each bottle;

1 portion x 4 bottles = 4 portions

Which equation represents how much of a bottle water Sarah took?

Since each bottle water was divided into 5 equal proportions and assuming that the bottle waters are of the same volumes, then Sarah has taken 4 out of 5 portions of a bottle water.

Answer: 4 ÷ 5 ﹦4/5  ♡♡♡

Explanation: When you see eqautions like these, always remember that                          the first number goes on the top and the second one goes on the bottom. Hope this helps! (~﹃~)~Hi☆

How is the atmospheric oxygen that is taken in by living things for respiration replaced?
A) After living things use oxygen for respiration, they exhale the oxygen back to the atmosphere.
B) Photosynthesis uses the carbon dioxide that is exhaled by living things to make oxygen.
C) Weathering releases oxygen that is locked in rocks due to sedimentation.
D) Oxygen that is dissolved in water such as oceans is released.

Answers

I believe the answer is B
Organisms using photosynthesis take in oxygen and release carbon dioxide (ex: plants)

Answer:

B.) Photosynthesis uses the carbon dioxide that is exhaled by living things to make oxygen.

Explanation:

Cylinder A contains a gas whose molecules have an average speed of 0.0000001 meters/sec. Cylinder B contains a gas whose molecules have an average speed of 0.3 meters/sec. Select the statement below that is true regarding these cylinders. options: Cylinder A contains a gas that has a temperature closest to absolute zero. Even though the molecules are moving at different speeds in the two cylinders, they have the same kinetic energy. Cylinder B contains molecules that are moving more slowly than the molecules in Cylinder A. Cylinder B contains a gas that has a temperature closest to absolute zero.

Answers

Answer:

The correct option is;

Cylinder A contains a gas that has a temperature closest to absolute zero

Explanation:

From the kinetic theory of gases, the average speed of a gaseous molecule is found from the following equation;

[tex]v_{rms} = \sqrt{\frac{3\cdot R \cdot T}{MW} }[/tex]

Where:

[tex]v_{rms}[/tex] = rms speed which is the square root of the average of the velocities of the gas molecules squared which is used in place of the average of the gas molecules as the sum of the velocities of all the gas molecules in the cylinder is zero

R = Universal gas constant = 8.3145 J/(mol·K)

MW = Molecular weight of the gas

Hence where we have;

[tex]v_{rmsA}[/tex] = Average velocity of gas A = 0.0000001 m/s

[tex]v_{rmsB}[/tex] = Average velocity of gas B = 0.3 m/s

Since, R and MW are constant for the gas in cylinder A constant, therefore, as [tex]v_{rmsA}[/tex] ≈ 0 m/s, the temperature, [tex]T_A[/tex], of gas A is closest to absolute zero.

How many moles of NaCl are contained in 100.0ml of a 0.20m solution

Answers

M= 0.20 M
V= 100.0 ml = 0.100 L
n= ??

M = n/v

:. n = MV

n = 0.20M x 0.1000L

:. n = 0.020 mol

Ms. Clark is teaching her class about how plants make food for themselves. On the board, she has written this: __________ + air + water = food for plants

Answers

Answer:

sunlight

Explanation:

During light-dependent reactions, carbon dioxide is converted to glucose.

Group of answer choices

True

False

Answers

Answer:The light-independent reactions use the ATP and NADPH from the light-dependent reactions to reduce carbon dioxide and convert the energy to the chemical bond energy in carbohydrates such as glucose.

Explanation:step-by-step

Answer:

FALSE

Explanation:

I just took the test and put true and it was wrong so it's false. Hope this helps and please mark brainliest!

Help Chem asap!!!!! Brainslist

Answers

Answer:

OH-

Explanation:

I’ll give Brainliest to the first answer
The amount of elements on the reactants side of an isolated equation are ___________ the amount of __________ that are formed on the ________ side. *
A)close to, ice crystals, cold
B)less than, properties, chemical
C)equal to, elements, products
D)similar, molecules, present
E)more than, elements, products

Answers

Answer:

C. equal to, elements, products

Explanation:

I took a quiz and it said this was right

Which of the following is stored in the skeletal system?
A. potassium
B. calcium
phosphorous
D. sodium

Answers

Answer:

b calcium

Explanation:

in a titration 20.0 mL of 0.150 M NaOH(aq) Solution exactly neutralize is 24.0 mL of an HCl solution what is the concentration of the HCl solution

Answers

Answer:

0.125

Explanation:

i took a test and got it right choosing this answer hopes this help

Discribe how an internal combustion engine works. What is drawback to the type of power?

Answers

Answer:

An internal combustion engine is a heat engine in which the combustion of a fuel occurs with an oxidizer in a combustion chamber. The force of combustion is converted into mechanical energy through the use of levers and gears. The by products of combustion include energy, water vapor, carbon dioxide (CO2), nitric oxide (NO), nitrogen dioxide (NO2), and carbon monoxide (CO). The two primary drawbacks to the internal combustion engine are the primary energy source is non-renewable (fossil fuels) and the by products can have damaging effects on the environment.

Explanation:

Does anyone know how to solve this

Answers

Answer:

Beta

Explanation:

Beta has signal 0 above and -1 under


The ___________________ is an early theory which states that our solar system was formed by the gravitational collapse of a massive giant cloud.
A) Nebular Theory
B) Capture Theory
C) Proto-planet Theory
D) Schmidt-Lyttleton accretion theory

Answers

Answer: A) Nebular Theory

Explanation:

Answer:

A)

Explanation:

(Multiple Choice, 30 pts)

A student wants to determine whether an unknown solid is an ionic compound. He puts some in water and finds that it does not dissolve. He says that this proves the solid is ionic. Which best evaluates the student's reasoning?

A. He is incorrect, because water can dissolve ionic solids.
B. The test proves nothing, because water dissolves all solids.
C. He is correct, because polar liquids cannot dissolve ionic solids.
D. The test proves nothing, because it only shows that the solid is a compound.

(I know water is polar, so I think its a?)

Answers

The student cannot prove that if the compound is ionic or covalent because not all ionic compounds dissolves in water. Some ionic compounds have higher lattice energy results in lower solubility. Thus, option D could be correct.

What are ionic compounds?

Ionic compounds are formed between metals and non metals. Metals are electron rich and they easily donate electrons to the non-metals. Non-metals are generally electronegative and they easily gains electrons from the metals.

Donating electrons make metals acquire positive charge and the non-metals acquire a  negative charge. This charge separation make the compound possess a permanent dipole moment. Which make them easily soluble in water by ion-dipole interaction.

However, some ionic compounds have very strong ionic bonds and their binding energy will be greater so that cannot be easily dissolved in water. For example, AgCl. Therefore, we cannot predict weather the compound is ionic or not by simply noting it solubility in water.

To find more on ionic compounds, refer here:

https://brainly.com/question/9167977

#SPJ3

Which of the following are social implications of an environmental policy? Check all that apply.
loss of jobs
poorer air quality
less erosion
cleaner water waste
higher taxes
elimination of tourist activities

Answers

Answer:

the correct answer is lost of jobs,higher taxes, and elimination of tourist activities

Explanation:

hope you have a blessed day:)

Answer:

the correct answer is lost of jobs,higher taxes, and elimination of tourist activities

Explanation:

thank you for the answer i hope EVERYONE has A BLESSED DAY!!!!!!!!!!!!!!!!!!!!!!

The map shows the main streams and the the rivers near City A and City B, as well as the nearby factories and farmland, The arrows in
the diagram show the direction of the water flow. City A gets its water from the sunset River and City B gets its water from the Moth Lake. A liquid herbicide was applied to a farmland. What is the greatest risk of using the herbicide?
Select One:

It will pollute the water source for the city A

It will pollute the air for the City B

It will pollute the water source of city B

It will pollute the air for the city A​

Answers

Answer:

c

Explanation:

the map shows water near the factories go into moth lake so all of the waist will end up there


Ca(OH)2
Name this compound according to IUPAC nomenclature.
A) calcium hydroxide
B) calcum oxide hydride
C) calcium (II) hydroxide
D) calcium (II) oxide hydride

Answers

B I think but not 100% sure
a calcium hydroxide

what is the compound of libr

Answers

Answer:

Lithium Bromide

Explanation:

Answer:

El bromuro de litio es un compuesto químico de litio y bromo. Su carácter higroscópico extremo hace que LiBr sea útil como desecante en ciertos sistemas de aire acondicionado.

Explanation:

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