Chemistry College

How many moles are in 150g of Li2O?​

How Many Moles Are In 150g Of Li2O?

Answers

Answer 1

Answer:

moles= w/mm

moles=150/30

moles=5

Related Questions

The picture below shows a NASA image of the Oort cloud, a sphere of objects that are thought to surround Earth's solar system at a distance of up to one light-year from the Sun.
If the Oort cloud does exist, which of the following could explain why the objects in it may have formed this spherical shape?
A
They are held in orbits by the Sun's gravitational force.

B
They are held in Earth's solar system by Neptune's magnetic field.

C
They float freely in space because the Sun's gravitational force is too weak to hold them in orbit.

D
They are held in stationary positions around Earth's solar system by other stars in space.

Answers

The gravitational pull of the Sun keeps them in their orbits. The gravitational pull of the Sun and surrounding stars combined is most likely what gives the Oort cloud its spherical shape.

What does NASA's Oort Cloud mean?

The Oort Cloud is a spherical layer of ice objects that is thought to be located between 2,000 and 100,000 astronomical units (AU) from our Sun, a star.

What makes it the Oort Cloud?

The Oort cloud, so named after the Dutch astronomer Jan Oort who first confirmed its existence, is a collection of objects with a combined mass estimated to be 10-100 times that of Earth that are less than 100 km (60 miles) across and maybe trillions in number.

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what is the definition of isomerism​

Answers

Answer:

Isomerism is the phenomenon in which more than one compounds have the same chemical formula but different chemical structures. Chemical compounds that have identical chemical formulae but differ in properties and the arrangement of atoms in the molecule are called isomers. Therefore, the compounds that exhibit isomerism are known as isomers.

The word “isomer” is derived from the Greek words “isos” and “meros”, which mean “equal parts”. This term was coined by the Swedish chemist Jacob Berzelius in the year 1830.

Explanation:

identify two conjugate base for each compound HCN and HBr

Answers

The conjugate base of HCN is CN^-

The conjugate base of HBr is Br^-

Name the following alkene:
CH3CH = CHCH2CH3
A. 3-pentane
B. 2-pentene
C. 2-pentane
D. 3-pentene

Answers

Answer:

2-pentene

Explanation:

The name of the alkene is 2 pentene. The correct option is B, 2-pentene.

What is 2-pentene?

Alkenes with the chemical formula [tex]C_5H_10[/tex] are known as pentene. Within its molecular structure, each has one double bond.

The given alkene [tex]CH_3CH = CHCH_2CH_3[/tex] is 2-pentene because the double bond is present in the second carbon and it's pentene because there are five carbons present.

Thus, the correct option is B. 2-pentene.

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How many neutrons are in an atom of argon–40?

Answers

Answer:

22 neutrons

Explanation:

If so please sorry

Astronauts must be protected from extreme heat while
reentering the Earth's atmosphere. Scientists can use the
engineering design process to help make reentry safer.
You have defined the problem as a need for heat shields to be stronger. What
should be your next step in using the engineering design process to solve the
problem?
O A. Communicate your solution to your team members.
O B. Update your initial design for the heat shield.
O C. Identify the criteria and constraints of the project.
O D. Build a prototype of a possible new type of heat shield.​

Answers

The next engineering step to be taken is to update your initial design for the heat shield.

What is a heat sheild?

The term heat sheild refers to a device that can be used to shield an from astronaut  extreme heat especially as they re-enter the earth's atmosphere.

After you have identified the problem, the next engineering step to be taken is to update your initial design for the heat shield.

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Which best explains the relationship between evaporation and temperature?
• A liquid evaporates slower at lower temperatures because the molecules are more spread apart and are not pushed
as easily from the liquid's surface.
O A liquid evaporates faster at lower temperatures becaus the attractions are decreased and more particles can
escape the surface of the liquid.
© A liquid evaporates slower at higher temperatures because the vapor pressure of the liquid is higher, SO fewer
molecules can escape the surface.
• A liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome
attractions in the liquid.

Answers

Answer: D

Explanation:

liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.

Answer:

D. A liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.

Explanation:

Correct on Edge 2022!!!

Good luck everyone, you got this! Have a great day!

ch3cooh number of bonding pairs and lone pairs.

Answers

Answer:

whats the question?

Explanation:

Calculate the percent composition of Ca3P2

Answers

Calculate the molar mass of Ca3P2 in grams per mole or search for a chemical formula or substance.

Answer:

Ca - 66%, P - 34%

Explanation:

So, this is the formula we can use to find the amount of each element:

Element count * Atomic mass = Mass

Plug in our elements for this:

Ca - 3*40.078=120.234

P - 2*30.973=61.946

Now, to find the percentage of mass, we must find total mass, and divide the two elements mass count by this total mass:

120.234+61.946=182.18

Now divide each element mass by the total mass:

Ca - 120.234/182.18=0.6599(Round to 0.65)

P - 61.946/182.18=0.34002(Round to 0.34)

Then multiply both numbers by 100 to get the percentage:

Ca - 65%

P - 34%

So these our your two answer!

Hope this helps!

HELP ME ASAP PLEASE

I need the answers I’m in a hurry

Answers

Answer: First box----Hail

             Second Box-------Snow

             Thrid Box-------Sleet

              Forth Box-----Rain

Hope that helped! :)

Hypothetical element A has three stable isotopes. The first isotope has a mass of 35.01 amu and an abundance of 35.00%. The second isotope has a mass of 36.01 amu and an abundance of 15.00%. The third isotope has a mass of 37.02 amu and an abundance of 50.00%. What is the atomic mass of element A

Answers

Answer:

36.16 amu

Explanation:

From the question given above, the following data were obtained:

1st Isotope:

Mass of 1st isotope = 35.01 amu

Abundance of 1st isotope = 35%

2nd isotope:

Mass of 2nd isotope = 36.01 amu

Abundance of 2nd isotope = 15%

3rd isotope:

Mass of 3rd isotope = 37.02 amu

Abundance of 3rd isotope = 50%

Atomic mass of element A =?

The atomic mass of element A can be obtained as follow:

Atomic mass = [(mass of 1st × Abundance)/100] + [(mass of 2nd × Abundance)/100] + [(mass of 3rd × Abundance)/100]

= [(35.01 × 35)/100] + [(36.01 × 15)/100] + [(37.02 × 50)/100]

= 12.25 + 5.40 + 18.51

= 36.16 amu

Thus, the atomic mass of element A is 36.16 amu

How many grams of chlorine are required in order to consume 100g of sodium chloride?

Answers

Answer:

92.1 g

Explanation:

Answer: 92.1 grams

I hope this helped :3

how many cats are in the word

Answers

Answer: more than 70,00 and most of that population is living on the streets

why does a plant have a cell wall and a cell membrane?
ASAP Pls have to turn it in at 11:00pm​

Answers

Answer:

The cell wall surrounds the plasma membrane and provides the cell tensile strength and protection. ... The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress.

hope It Helps U

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When a balloon containing 635 mL of air is taken from sea level (at standard pressure) to a higher altitude, the balloon expands to 829 mL. What is the air pressure at this new altitude (in atm)?

Answers

Answer:

0.766atm

Explanation:

Boyles law

P1V1=P2V2

1×635=P2×829

P2=635/829

P2=0.766atm

In the reaction below does water acts as the acid or as the base?
H2S + H20 - HS1- + H30+ *
O a. Neither, water is neutral
O b. Acid
O C. Base

Answers

Answer:

C. Base.

Explanation:

Hello there!

In this case, according to the given information, it turns out convenient for us to realize that the concept acid and base we should use here is based off the Bronsted-Lowry one, which says that an acid is a hydrogen donor. In such a way, since water accepts one H ion as it goes to H3O⁺, we infer it is C. Base and the H2S the acid.

Also, we can tell HS⁻ is the conjugate base and H3O⁺ the conjugate acid.

Regards!

The compound AlP (aluminum phosphide) is a compound semiconductor having mixed ionic and covalent bonding. Calculate the fraction of bonding that is ionic.

Answers

Answer:

0.086

Explanation:

The formula for calculating the fraction of a covalent bond can be expressed as:

= exp (-0.25ΔE²)

[tex]= exp[-0.25(E_{Al}-E_{p})^2]---(1)[/tex]

from the equation above;

[tex]E_{Al}[/tex] = the electronegativity of aluminum

[tex]E_P[/tex] = electronegativity of phosphorus

Using the data from periodic table figures;

[tex]E_{Al}[/tex] = 1.5

[tex]E_P[/tex] = 2.1

∴

fraction of the covalent = exp[-0.25(1.5 - 2.1)²]

fraction of the covalent = exp(-0.09)

fraction of the covalent = 0.914

Now, the fraction of ionic bond will be = 1 - the fraction  of covalent bond

= 1 - 0.914

∴

the fraction of bond that is ionic = 0.086

How many molecules of sodium fluoride (NaF) are found in 7.2 moles of sodium fluoride?

Answers

Answer:

well please answer me it's question too after you get it

Explanation:

i am also stucked in that question

No. of molecules of any substance is one mole

= Avogadro's Number = (6.022 x 10^23)

So, no. of molecules in 7.2 moles of sodium fluoride

= 7.2 × (6.022 x 10^23)

= 4.33584^24

What piece of apparatus could be used to measure the volume of gas produced in a reaction
1)beaker
2)gas syringe
3) top pan balance

Answers

Answer: 2)gas syringe

Explanation:

the volume of a gas is usually measured with a gas syringe (or sometimes with an upside-down measuring cylinder)

Answer:

top pan balance

Explanation:

sodium is an inactive metal why​

Answers

Answer:

Inactive metals are inert metals that doesn’t react with most of the chemicals.They are highly resistant to oxidation and corrosion when exposed to moisture.

Explanation:

Questions
Determine the primary and secondary valencies of the following complexes and calculate their spin only magnetic
moment.
iii. [Cu(OH2)6]504
i. K[TI(CN).]
ii. [V(NH3)4Br2]
iv. K3 [Cr(CN)6]​

Answers

Answer:

yes

Explanation:

yes

What happens in radioactive decay?
O A. An electron is lost to form a negatively charged particle.
O B. An unstable nucleus breaks down into smaller parts.
O C. Two smaller nuclei are joined to form one larger nucleus.
O D. A large nucleus breaks apart to form smaller nuclei.
SHIRME

Answers

A radioactive atom will spontaneously release radiation in the shape of energy rather than particles in order to transition into a more steady state.

Why is something radioactive?

Radioactivity, as its name suggests, seems to be the act of generating radiation without any external cause. This is carried out by an unstable atomic nucleus that "wants" to abandon certain power in order to change to a more stable form.

Are people radioactive at all?

Absolutely, since humans consume radioactive materials from the environment through food, drink, and air, our bodies are inherently radioactive. Our bodies take these substances in and store them in our bones, tissues, and organs. We also breathe them in and consume them.

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help ! thank u / ill give brainlist !

Give two examples of energy transformations that occur throughout the journey to or on the planet.

Answers

Answer:

Our bodies convert chemical energy in our food into mechanical energy for us to move.

An electric fan transforms electrical energy into kinetic energy

Reword it tho

Hope this helps!!

If it takes 720. mL of 0.00125 M Mg(OH)2 to neutralize 425 mL of an HCI
solution, what is the concentration of the HCI? Mg(OH)2 + HCl →MgCl2
+ H20

Answers

Answer:

0.004235 M

Explanation:

The neutralization reaction of this question is given as follows:

Mg(OH)2 + 2HCl → MgCl2 + 2H2O

Using the formula below:

CaVa/CbVb = na/nb

Where;

Ca = concentration of acid (M)

Cb = concentration of base (M)

Va = volume of acid (mL)

Vb = volume of base (mL)

na = number of moles of acid = 2

nb = number of moles of base = 1

From the information provided in this question;

Ca = ?

Cb = 0.00125 M

Va = 425 mL

Vb = 720 mL

na (HCl) = 2

nb = (Mg(OH)2) = 1

Using the formula; CaVa/CbVb = na/nb

Ca × 425/0.00125 × 720 = 2/1

425Ca/0.9 = 2

472.2Ca = 2

Ca = 2/472.2

Ca = 0.004235 M

Rachard is studying a sample of a substance. The sample is in a large, triangle-shaped flask. Rachard moves the sample to a small, rectangular container. Both containers are closed. Below is an image of the containers used by Rachard. She notices that the shape and the volume of the substance both change when the sample is moved. In which state of matter is the substance?

Answers

There’s no image for me to look at.

is a glow stick Endothermic or exothermic ?

Answers

Answer:

exothermic

Explanation:

what are factors that affecting the boiling point of liquid?​

Answers

It would probably be pressure and temperature

You dissolve 14 g of [tex]Mg(NO_{3} )_{2}[/tex] in water and dilute to 750 mL. What is the molarity of this solution?



Show your work

Answers

I didn’t get the answer

An empirical formula calculation gives a molar ratio of 1.0 oxygen, 4.8 hydrogen, 4.1 carbon and 1.8 nitrogen. If the molecular mass is approximately 200 amu, what is the molecular formula

Answers

Answer:

[tex]C_8H_{10}O_2N_4[/tex]

Explanation:

Hello there!

In this case, according to the given information about the empirical formula of this compound, we can infer that these mole ratios can be rounded to the following whole numbers in order to find the empirical formula:

[tex]C_4H_5ON_2[/tex]

Whose molar mass is 97.09 amu and thus, the ratio of the molecular to the empirical molar mass is:

[tex]200/97.09=2.1[/tex]

Which is almost a factor of 2; and therefore, the resulting molecular formula is:

[tex]C_8H_{10}O_2N_4[/tex]

Regards!

True or false: A skeleton equation in chemistry shows the relative amounts of all materials in the reaction

Answers

Answer:

false im pretty sure.

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