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6. What is the mass, in grams, of 1.92 moles of Ca(OH),?

Answers

Answer 1

Answer:

Mass =  142.25 g

Explanation:

Given data:

Mass of Ca(OH)₂ = ?

Number of moles of Ca(OH)₂ = 1.92 mol

Solution:

Formula:

Mass = number of moles × molar mass

Molar mass of Ca(OH)₂ = 74.09 g/mol

by putting values,

Mass = 1.92 mol × 74.09 g/mol

Mass =  142.25 g


Related Questions

an organic pesticide was decomposed by an oxygen combustion procedure to convert the chlorine in the molecule to water soluble chloride the chloride was then precipitated as AgCl A 0.7715 gram precipitate was obtained from 500 grams of pesticide Calculate the percentage chlorine in the pesticide

Answers

Answer:

0.0382%

Explanation:

Given that:

Silver chloride = AgCl

Molar mass of AgCl = (107.87 + 35.5) = 143.37 g/mol

Chlorine, Cl = 35.5

143.37g/mol of AgCl = 35.5 g of Cl

Hence, 1 g AgCl will give ; (35.5 / 143.37)

1g AgCl = 0.2476 g Cl

In 0.7715 g AgCl, ; (0.2476*0.7715) g Cl

= 0.1910 g Cl

Therefore, percentage of Cl in 500g sample:

(Mass of Chlorine / mass of sample) * 100%

(0.1910 / 500) * 100%

0.000382 * 100%

= 0.0382%

An scientist located a nugget of an unknown substance. However, he determined that this nugget has a
mass of 63 g and a volume of 9 cm^3. What is the density of this nugget?

Answers

Answer: The density of this nugget is [tex]7\text{ g cm}^{-3}[/tex] .

Explanation:

We are given that,

Mass of nugget = 63 g

Volume = [tex]9\ cm^3[/tex]

The computation of density of a substance is given by :-

[tex]\text{Density}=\dfrac{\text{Mass}}{\text{Volume}}\\\\\Rightarrow\ \text{Density}=\dfrac{63}{9}\text{ g cm}^{-3}[/tex]

[tex]\Rightarrow\ \text{Density =}7\text{ g cm}^{-3}[/tex]

Therefore, the density of this nugget is [tex]7\text{ g cm}^{-3}[/tex] .

= 1
= 2
5
= 3
10
= 6
7
8
Write a balanced half-reaction for the reduction of gaseous oxygen (02) to liquid water
to liquid water (H2O) in acidic aqueous solution. Be sure to add physical state symbols
where appropriate.
a​

Answers

A balanced half-reaction :

O₂(g)+ 4H⁺(aq)+ 4e⁻⇒2H₂O(l)

Further explanation

Given

Reduction of gaseous oxygen (O₂) to liquid water(H₂O)

Required

A balanced half-reaction

Solution

Step 1 : Equalize the number of elements by adding coefficients

Equates element O

O₂(g)⇒2H₂O(l)

Step 2 : Equalize H by adding H⁺ on the opposite side (the deficient area of H).

O₂(g)+ 4H⁺(aq)⇒2H₂O(l)

Step 3 : Equalized the charge using the addition of electrons (e⁻) along the H⁺ field.

O₂(g)+ 4H⁺(aq)+ 4e⁻⇒2H₂O(l)

4.Calculate the Hydroxide, Hydrogen ion and POH of solution if the PH of solution is 7.b
5.Solution A Has PH =4 and solution B has PH = 7.How many times greater is the Hydroxide ion
concentration in solution A than the Hydronium ion concentration in solution B​

Answers

the ph is gonna be your value and the 4 is gonna be your main subject

so as the ph is your value u gonna ad your ph and 7 and 4 toghter then multiple your answer 2 times  because ph represent multiple and your value  

Please help ASAP
Read thing for the question thanks!!

Answers

Answer:

JOSHUA

Explanation:

JOSHUA

A molecule or ion that donates the hydrogen in a hydrogen bond is a hydrogen bond donor A molecule or ion that binds to this hydrogen is a hydrogen bond acceptor. Specify the hydrogen bonding behavior of the 4 species below by selecting: donor for species that act as donors only acceptor for species that act as acceptors only both for species that act as both donors and acceptors neither for species that act neither as donors nor as acceptors.

Answers

The question is incomplete, the complete question is found in the image attached.

Answer:

1- acceptor

2-donor

3-acceptor

4-donor

Explanation:

A hydrogen bond acceptor is a molecule that has an electronegative atom having a lone pair of electrons that participates in the hydrogen bond.

A hydrogen bond donor is the molecule that supplies the hydrogen atom of a hydrogen bond.

If we look at structure I-IV in the image attached, I and III are hydrogen bond acceptors because they all possess electronegative atoms having lone pairs of electrons but do not have hydrgen atoms bonded to highly electronegative atoms.

Similarly, structures II and IV are hydrogen bond donors. The C=C double bond is electron withdrawing and highly electronegative making the hydrogen atoms attached to it acidic and hydrogen bond donors. Also, nitrogen is an electronegative atom thereby making structure IV a hydrogen bond donor.

a A student decreases the temperature of a 484 cm ^ 3 balloon from 570 K to 285 Assuming constant pressure, what should the new volume of the balloon be? Round your answer to one decimal place.

Answers

Answer:

242 cm³.

Explanation:

The following data were obtained from the question:

Initial volume (V₁) = 484 cm³

Initial temperature (T₁) = 570 K

Final temperature (T₂) = 285 K

Pressure = constant

Final volume (V₂) =?

The new volume (i.e final volume) of the balloon can be obtained by using the Charles' law equation as illustrated below:

V₁/T₁ = V₂/T₂

484 / 570 = V₂ / 285

Cross

484 × 285 = 570 × V₂

137940 = 570 × V₂

Divide both side by 570

V₂ = 137940 / 570

V₂ = 242 cm³

Therefore, the new volume of the balloon is 242 cm³

1. All the following are correctly balanced except -
A. 2C2H2 + 502 4CO2 + 2H20
B. 4Fe + 302 – 2Fe2O3
C. NaHCO3 Na2CO3 + H2O + CO2
D. 2CH,OH + 302 2C02 + 4H20

Answers

I would say the answer is C

How does changing the number of electrons in an atom affect the atom?

Answers

In addition to protons and neutrons, all atoms have electrons, negatively charged particles that move around in the space surrounding the positively-charged nuclear core. But unlike protons, the number of electrons can and does change without affecting the kind of element an atom is!

How many significant figures are in 3.20x10^2 g?

Answers

Answer:

3

Explanation:

For numbers with decimals, count the number after the decimal.

Question 2 of 10 A chemist has a block of copper metal (density is 8.96 g/mL). They drop the metal into a graduated cylinder containing water, and find the volume change is 2.90 mL. What is the mass of the block, in grams? h​

Answers

Answer:

m = 25.98 g

Explanation:

Given data:

Density of copper metal = 8.96 g/mL

Volume of copper metal block = 2.90 mL

Mass of copper metal block = ?

Solution:

The volume of given block of copper is equal to the volume change of water by adding this block.

Density formula:

d = m/v

by putting values,

8.96 g/mL = m/ 2.90 mL

m = 8.96 g/mL × 2.90 mL

m = 25.98 g

How many molecules are in 15 moles of CO2?

Answers

There are 90.345 x 10^23 molecules in 15 moles of CO2.

What is Avogadro's number?

Avogadro's number is the number of units, atoms or molecules in one mole of a substance which is equals to 6.02214076 × 1023. This number is also known as the Avogadro constant.

This means that one mole of a substance is equals to 6.02214076 × 1023 atoms, ions or molecules then 15 moles is equals to 90.345 x 10^23 molecules so we can conclude that there are 90.345 x 10^23 molecules are in 15 moles of CO2.

Learn more about mole here: brainly.com/question/1427235

7. You are about to perform some intricate electrical studies on single skeletal muscle fibers from a gastronemius muscle. But first, you must prepare 6L of a 170 mM NaCl solution in which to bath the isolated muscle during your studies. How many grams of NaCl must you weigh out on the lab balance to prepare this bath solution

Answers

Answer:

58.61 grams

Explanation:

Taking The molecular weight of NaCl = 58.44 grams/mole

Determine how many grams of NaCl to prepare the bath solution

first we will calculate the moles of NaCl that is contained in 6L of 170 mM of NaCI solution

= ( 6 * 170 ) / 1000

= 1020 / 1000 = 1.020 moles

next

determine how many grams of NaCl

= moles of NaCl * molar mass of NaCl

= 1.020 * 58.44

= 58.61 grams

Which of the following chemical equations correctly
represents between calcium hydroxide and
hydrochloric acid?
+ 2HCI →
CaCl2(aq) + 2H20)
'(aq)
+ HCI →
'(aq)
A Ca(OH)2(aq)
B Ca(OH)2(aq)
C Ca(OH)2(aq)
D Ca(OH)2(aq)
O
caCl(aq)
CaCl2(aq)
+ H2O
+ 2H200
+ HCl(aq)
+ 2HCI
'(aq)
Caci,
2(aq)
+ 2H211)
+
2(g)

Answers

Answer:

Ca(OH)2 + HCI

Explanation:

Calcium hydroxides formula is: Ca(OH)2

Hydrochloric Acids formula is : HCI

Please rate and give thanks!

A purified protein is in a HEPES buffer at pH 7.0 with 600 mM NaCl. A 1 mL sample of the protein solution is dialyzed against 1.0 L of the same HEPES buffer with 0 mM NaCl. Once the dialysis has come to equilibrium, what is the concentration (in mM) of NaCl in the protein sample

Answers

Answer:

Explanation:

Using the dilution formula to determine the final concentration of NaCl in the protein sample.

[tex]M_1V_1 = M_2V_2[/tex]

[tex]600 \ mM \times 1 \ mL= M_2 \times ( 1000\ mL + 1 \ mL)[/tex]

[tex]M_2= \dfrac{600 \ mM \times 1 \ mL}{ ( 1001\ mL)}[/tex]

[tex]M_2= 0.599 \ mM[/tex]

However, when dialysis attains equilibrium, it implies that the sample was dialyzed twice, SO:

[tex]M_2 = \dfrac{600 \ mM\times 1 \ mL}{201 \ mL} = 2.97 \ mM[/tex]

Now, take the concentration as 2.97 mM

Then:

[tex]M_f = \dfrac{2.985 mM \times 1 mL}{201 \ mL}[/tex]

[tex]M_f = 0.01485 \ mM[/tex]

[NaCl] = 0.01485 mM

Atoms of arsenic (As) are often added to silicon (Si) in a process called doping to change the conductivity of the silicon. How does the addition of arsenic change the conductivity of silicon?


a) An atom of arsenic has one fewer valence electron and more electron shells than an atom of silicon, so the conductivity decreases because the arsenic atom gains an electron.

b) An atom of arsenic has one more valence electron and more electron shells than an atom of silicon, so the conductivity decreases because the arsenic atom loses the electron.

c) An atom of arsenic has one fewer valence electron and fewer electron shells than an atom of silicon, so the conductivity increases because the arsenic atom gains an electron.

d) An atom of arsenic has one more valence electron and more electron shells than an atom of silicon, so the conductivity increases because the arsenic atom loses the electron.


HAD TO POST THIS THIS BC THE OTHER POSTED IS WRONG

Answers

Answer:

d) An atom of arsenic has one more valence electron and more electron shells than an atom of silicon, so the conductivity increases because the arsenic atom loses the electron.

Explanation:

This is an example of a n-type semiconductor. The additional electron introduced to the 'grid' of silicon atoms causes an increase in the conductivity of the silicon. This additional electron is introduced as arsenic loses its extra electron.

Answer:

D is the answer, the other one is wrong.

Explanation:

A force of 100 newtons was necessary to lift a tree. A total of 50 joules of work was done. How far was the tree lifted

Answers

Answer:

Distance lift the tree = 0.5 m

Explanation:

Given:

Work done = 50 joules

Force = 100 newton

Find:

Distance lift the tree

Computation:

Distance = Work done / Force

Distance = 50 / 100

Distance = 0.5 m

Distance lift the tree = 0.5 m

Which element is more electronegative, Ge or Bi

Answers

Answer:

Ge is more electronegative

Explanation:

answer: GE is more electronegative


i hope this helps luv! ❤️✨❤️

How many moles of hydrogen react with 4.5 moles of oxygen to synthesize water?

Answers

Answer:

9moles of hydrogen gas

Explanation:

To solve this problem, we write the reaction expression first;

                       2H₂   +   O₂    →     2H₂O

We have been given the number of moles of oxygen gas to be:

 Number of moles of oxygen gas  = 4.5moles

From the balanced reaction expression:

      1 mole of oxygen gas reacts with 2 moles of hydrogen gas

  4.5moles of oxygen gas will react with 4.5 x 2  = 9moles of hydrogen gas

Riboflavin is one of the B vitamins It is also known as B6 and is made up of carbon, hydrogen, nitrogen and oxygen atoms. When 10.0 g of vitamin B6 is burned in oxygen, 19.88 g of CO2 and 4.79 g of H2O are obtained. Another experiment shows that vitamin B6 is made up of 14.89% of N. What is the simplest formula for vitamin B6

Answers

Answer:

C₁₇H₂₀N₄O₆

Explanation:

First, we need to determine the percentage of the atoms in the molecule. Then, assuming a basis of 100 we must convert the mass of each atom to moles. Simplest formula is the simplest ratio of atoms presents in the molecule:

%C:

19.88g CO2 * (12.01g/mol C / 44.01g/mol CO2) = 5.425g C

5.425g C / 10.0g * 100 = 54.25% C

%H:

4.79g H2O * (2*1.01g/mol / 18.015g/mol) = 0.537g H

0.537g H / 10.0g * 100 = 5.37%

%N:

14.89%

%O:

100 - 14.89% - 54.25% - 5.37% = 25.49%

Moles of each atom in a basis of 100g:

C: 54.25g * (1mol / 12.01g) = 4.517moles

H: 5.37g * (1mol / 1.01g) = 5.317 moles

N: 14.89g * (1mol / 14.01g) = 1.063 moles

O: 25.49g * (1mol / 16g) = 1.593 moles

Dividing each amount of moles in the lower number of moles (moles N):

C = 4.517mol / 1.063mol = 4.25

H = 5.317mol / 1.063mol = 5

N = 1.063mol / 1.063mol = 1

O = 1.593mol / 1.063mol = 1.5

This ratio multiplied 4 times to obtain whole-numbers:

C = 4.25*4 = 17

H = 5*4 = 20

N = 1*4 = 4

O = 1.5*4 = 6

The simplest formula for vitamin B6 is:

C₁₇H₂₀N₄O₆

Cleavage refers to the way a rock:
A. shine
B. breaks
C. streaks
D. is made

Answers

Explanation:

Türküm ben yanlisikla siteye girdim.

Answer:

breaks

Explanation:

I think its braks

HELLOSOEOODORODODODORRLKRKLRLRLF

Answers

Answer:

I'd say maybe Dangerous? I hope this helps

Answer:

golden is sometimes referred to as shiny and beatitful

Explanation:

The columns in the periodic table are called groups. What do the elements in group 17 have in common?

Answers

Answer:

All of the elements in group 17 all have 7 valence electrons. This is one thing they all share in common.

Explanation:

Does the model represent a chemical reaction? (Image)

Answers

Answer:

yes it is a chemical reaction

Explanation:

because the substances combined and made something new

Why is it sometimes not practical to use scale models when representing objects in space?

Answers

well space base stars and I'm done know

Explanation:

hddjdjrurbdhdjjrbdj

Sometimes making a scale model is not practical because it is expensive and takes a lot time to build up for large models of objects. Rebuilding of destroyed scale models is very difficult.  

What is scale model ?

A physical model that is geometrically comparable to an item is called a scale model . Scale models may be larger than small prototypes like anatomical structures or subatomic particles, but they are often smaller than huge prototypes like cars, buildings, or people.

Mockups are models created at the same scale as the prototype. In addition to being used as toys, scale models are also utilized as tools for engineering design and testing, marketing, and sales, as well as for military strategy and special effects in movies.

The pursuit of model construction as a pastime for artistic purposes is also common. However, it is very expensive and time consuming to create a scale model.

Find more on scale models:

https://brainly.com/question/19512201

#SPJ2

How many formula units are contained in 0.57 g Cao?

Answers

Then you will multiply the number of moles by 6.022×1023formula units/mol . To determine the molar mass of a compound, add the atomic weight on the periodic table in g/mol times each element's subscript. Since the formula unit CaO has no subscripts, they are understood to be 1

Which of these has the most kinetic energy?

A. a 25 kg fish tank sitting on a table
B. a .05 g fish swimming in a fish tank
C. a 7,500 kg car parked on a steep hill
D. a 50 kg boulder suspended from a cliff

Answers

A. a 25 kg fish tank sitting on a table

Which element in group 17 has the highest ionization energy

Answers

Answer:

fluorine

Explanation:

it has the highest electronegativity in the group and in the periodic table

Which energy transformation occurs when you rub your hands together to warm them?
kinetic energy to radiant energy
thermal energy to kinetic energy
thermal energy to potential energy
want energy to thermal energy

Answers

Explanation:

The answer is thermal energy/ kinetic energy.. because friction on hands promotes thermal energy. because you want your hands 2 be warm, rubbing them 2gether creates heat and absorption of heat thru the skin which skin is susceptible to warm, humans can put hands under arm pits to warm hands, without any available heat source..

Gather data: Four other pairs of elements in the same chemical family are listed below. List the number of valence electrons in each element. Beryllium Nitrogen Oxygen Fluorine Magnesium Phosphorus Sulfur Chlorine

Answers

Explanation:

Valence electrons is the number of electrons in the outermost shell of an atom. For the main group elements, the group number represents the number of valence electrons.

Beryllium

This belongs to the group 2 hence, it has valency of 2.

Nitrogen

This belongs to group 5, hence it has valency of 5.

Oxygen

This belongs to group 6, hence it has valency  of 6.

Fluorine

This belongs to group 7, hence it has valency of 7.

Magnesium

This belongs to group 2, hence it has valency of 2.

Phosphorus

This belongs to group 5, hence it has valency of 5

Sulphur

This belongs to group 6, it has valency of 6

Chlorine

This belongs to group 7, it has valency of 7

Answer:

Beryllium: 2 valence electrons.

Nitrogen: 5 valence electrons.

Oxygen: 6 valence electrons.

Fluorine : 7 valence electrons.

Magnesium : 2 valence electrons.

Phosphorus : 5 valence electrons.

Sulphur : 6 valence electrons.

Chlorine : 7 valence electrons.

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A schools math department has money to spend on calculators. It uses the equation y = 1,000 80x to determine how much money is left in the account to spend on calculators, where x represents the number of calculators purchased. What is the meaning of the slope of the equation?A. Each calculator costs $1,000.B. The account had $1,000 before buying calculators.C. Each calculator costs $80.D. The account had $80 before buying calculators. Write the phrase as an expression.28 divided by 7An expression isJust to let you guys know the answer is not 28/2 because someone already got it wrong. Which of the expressions below are equal to 3x + 9y + 15? Select all that apply.A) 3(x + y + 5)B) 3(3x + 3y) + 15C) 3(x + 3y + 5)D) 3x + 3(3y + 5) It is found experimentally that the electric field in a certain region of Earth's atmosphere is directed vertically down. At an altitude of 390 m the field has magnitude 60.0 N/C. At an altitude of 240 m, the magnitude is 100 N/C. Find the net amount of charge contained in a cube 150 m on edge, with horizontal faces at altitudes of 240 and 390 m. Neglect the curvature of Earth. Can someone Find f (2) The following data give the estimated prices of a 6-ounce can or a 7.06-ounce pouch of water-packed tuna for 14 different brands, based on prices paid nationally in supermarkets are reproduced here.0.99 1.92 1.23 0.85 0.65 0.53 1.411.12 0.63 0.67 0.69 0.60 0.60 0.66a. Find the range. b. Find the sample variance. c. Find the sample standard deviation. is -3 greater or less then 4 Tori earned $62.86 as a bonus from her job. She decided to buy as many CDs as possible since they were on sale for $8.80 each. Estimate how many CDs Tori can buy. What was the primary function of the Texas Rangers during the U.S.-Mexican War?A. Kill any Mexican soldier found on the northern side of the Rio Grande in order to prevent a Mexican invasion.B. Round up Native Americans and transport them to the territory provided to them by the United States government.C. Protect supply lines and gain vital information in order to assist the United States with the war against Mexico.D. Intimidate Mexicans and Natives who were still living in Texas in order to maintain Maribeau Lamars policies. how did the native american's use natural resources for food, shelter and clothing differ from how people use natural resources today? You move right 1 unit. You end at (2, -1). Where did you start? what is cicada 3301? i will give brainliest if you give me a correct answer (not copy and pasted) and somewhat well detailed, i guess Division as Fractions - WordNamecach problem. Make sure to write your answer as a fraction.Henry wanted to collect 65 pounds of cans in 7 days. How much should hecollect each day to reach his goal? Which two whole numbers does youranswer lie between? Who wants branliest???!!! Use the distributive property to match equivalent expressions.-7(4 + x)-28 + 2x7(4 + x)28-7X7(4-x)28 +7x-7(4x)-28-7xIntroDone What does unconscionable manner mean? On September 1, Capitol Maintenance Company contracted to provide monthly maintenance services for the next seven months at a rate of $2,300 per month. The client paid Capitol $16,100 on September 1. The maintenance services began on that date. Assuming Capitol records deferred revenues using the alternative treatment, what would be the adjusting entry recorded on December 31 You are contemplating between four possible interest rate structures. The rates are as follows: annual effective rate of 12% annual nominal rate of 12% compounded monthly annual nominal rate of 8% compounded quarterly annual nominal rate of 10% compounded semiannually You wish to deposit $1,000 into a fund for 2 years. Calculate the difference between the largest and smallest possible accumulated values of your deposit at the end of 2 years. Describe the end behavior of each function.f(x) = -25 + 4x - 4x + 4 Robert has 7,995 trading cards. He wants to put them into a book. He can fit 15 cards on each page. How many pages will he need?