Chemistry High School

W(OH)2 + 2 HCl → WCl2 + 2 H2O

How many grams of W(OH)2 are needed to react with 150 grams of HCl?

(MM W(OH)2 = 217.855 g/mol) (MM HCl = 36.461 g/mol)

Group of answer choices

448.126 grams HCl

50.209 grams HCl

50.209 grams W(OH)2

448.126 grams W(OH)2

Answers

Answer 1

The amount of W(OH)2 needed would be 448.126 g

Stoichiometric calculation

From the equation of the reaction:

W(OH)2 + 2 HCl → WCl2 + 2 H2O

The mole ratio of W(OH)2 to HCl is 1:2

Mole of 150g HCl = 150/36.461

                                 = 4.11 moles

Equivalent mole of W(OH)2 = 4.11/2

                                           = 2.06 moles

Mass of 2.06 moles W(OH)2 = 2.06 x 217.855

                                                = 448.188g

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Related Questions

How is water important in our life?

(show in numbers the minerals that we need and is found in water)

Answers

Answer:

Water plays many important roles in the body including,flushing waste from the body,regulating body temperature,transportation of nutrients and is necessary for digestion.No wonder it is considered "essential"!.Plain water is the best choice for hydrating the body.

Explanation:

hope it helps you><

Can you post all the answers for this quick check Reactants vs. Products Quick Check
According to the law of conservation of mass, which statement about chemical reactions is always true?(1 point)

Answers

1) According to the law of conservation of mass, which statement about chemical reactions is always true?

Answer: The number of atoms of each element in the reactants is the same as the number of atoms of each element in the products.

2) When 1 mole of nitrogen gas (N2) reacts with 3 moles of hydrogen gas (H2), how many moles of ammonia (NH3) are produced?

Answer:

2 moles

3) Sulfur trioxide gas combines with water to form a single product.

SO3 + H2O → ?

Based on the law of conservation of mass, which option is the product of the reaction?

Answer:

H2SO4

4) Lead (II) nitrate as Pb(NO3)2 and potassium iodide as KI combine to form the products shown.

2 KNO3 + PbI2

How many moles of each reactant are involved in the reaction?

Answer:

1 mole of lead (II) nitrate and 2 moles of potassium iodide

5) In a reaction, 1 mole of silver nitrate combines with 1 mole of sodium chloride.

AgNO3 + NaCl

Which statement about the product is justified by the law of conservation of mass?

Answer:

There will be 1 mole of silver (Ag) in the product.

According to the law of conservation of mass, the statement that is always true about chemical reactions is "The total mass of the reactants is equal to the total mass of the products."

The law of conservation of mass states that in a closed system, the total mass of substances before a chemical reaction is equal to the total mass of substances after the reaction.

The matter is neither created nor destroyed during a chemical reaction; it is simply rearranged to form new substances.

This principle holds true for all chemical reactions, regardless of the types of substances involved or the complexity of the reaction.

It also helps to establish the stoichiometry of reactions, which involves determining the relative quantities of substances involved in a reaction based on their balanced chemical equation.

To learn more about the law of conservation of mass, follow the link:

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An example of a heterogeneous mixture is
A)
soil
B)
sugar
C)
carbon dioxide
D)
carbon monoxide

Answers

A) Soil
Air can also be an example of a heterogeneous mixture

A student heated a blue copper sulfate crystal in a test tube. After a few minutes, she observed that the crystal turned white and the inside of the test tube was covered with a thin film of water. The water inside the test tube most likely __.

Multiple choice question.

seeped through the sides of the test tube


was left from cleaning the test tube the night before


condensed from the air around the test tube


came from the blue copper sulfate crystal, which is a hydrate

Answers

The water from inside the test tube most likely came from the blue copper sulfate crystal which is a hydrated salt.

Hydrated salts

Hydrated salts contain water of hydration.

A blue copper sulfate crystal contains water of hydration.

When heated, the water evaporates off to give an anhydrous salt which appears colorless.

The equation of the reaction is as follows:

CuSO4•5H2O -----> CuSO4 + 5H2O(g)

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A reaction is monitored and the products are found to be a salt and water. The reactant(s) must have been _____. two metal-nonmetal compounds a metal-nonmetal compound a metal and a metal-nonmetal compound an acid and a base

Answers

Answer:

D.) An acid and a base

Explanation:

One part of an acid is H+ and the other part is a negatively charged ion. One part of a base is -OH and the other part is a positively charged ion. When an acid and base react, the H+ and -OH combine to form water and the ions combine to form a salt.

The others are incorrect because they do not guarantee that water (H2O) and a salt are products.

What is the definition of JET STREAM?
A.the winds that blow from the west and are in a narrow stream
B. generally,westerly winds concentrated in a relatively narrow and shallow stream up inn upper troposphere of the earth
C the winds that blow and are in a shallow stream in earth
D with that blow around the earth

Answers

Answer:

I believe D

Explanation:

I am dearly sorry If I am wrong,

Answer:

I believe the answer is B

Explanation:

balance the following chemical equation by providing the correct coefficients fe+h2so4 fe(so4)3 + h2
help me please

Answers

Answer:

2Fe + 3H2SO4 + Fe2(SO4)3+ 3H2

Explanation:

1. Fe (SO4) 3 is an incorrectly written formula because iron is trivalent as we can see by this three ahead of SO4. SO4 is divalent always.

2. since (SO4) is 3, this three shows us that there must be 3 in the reactants as well.

so now there is 3H2SO4

3. Since we have added 3 to one hydrogen we must add another. So now it's 3H2

4. and finally iron. In Fe2 (SO4) 3 we see this 2 in front of Fe which means it goes 2Fe.

Is this a scientific model? Use complete sentences to explain why or why not.

Answers

Answer:

Yes

Explanation:

Beacuse it shows the tempature of the day

Which line on the graph (1, 2, or 3) represents the system at dynamic equilibrium? Explain your answer.

Answers

Answer:

line 2

Explanation:

Because it's where the products and reactants meet together.

The system at dynamic equilibrium is 2.

What is dynamic equilibrium?

Rate of forward reaction is equal to the rate of backward reaction.Dynamic Equilibrium can be described because of the state of a given device wherein the reversible response taking vicinity in it stops converting the ratio of reactants and merchandise, but there may be a motion of materials between the reactants and the products.

Many physical and chemical processes are reversible. A reversible system is stated to be in dynamic equilibrium while the ahead and reverse procedures arise on the same price, ensuing in no observable change within the system.

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Why doesn't the United States embrace nuclear energy?.

Answers

Answer: Advantages and Challenges of Nuclear Energy Nuclear energy protects air quality by producing massive amounts of carbon-free electricity. It powers communities in 28 U.S. states and contributes to many non-electric applications, ranging from the medical field to space exploration.

Explanation:

Plsssssssssssssssssssssssssssssssssssssssss

Answers

Answer:

laurasia and gondwana is the correct answer

You have 1.50 L of a stock solution of 4.75 M hydrochloric acid. You need to dilute it to 1.20 M. What is the maximum volume of the dilute solution can you make

Answers

Answer:

5.9375 L

Explanation:

To solve this question you use the proportionality of dilutions

C1 × V1 = C2 × V2

4.75 M × 1.50 L = 1.20 L × V2

⇒ V2 = (4.75 M × 1.50 L) / (1.20 L) = 5.9375 L

PLEASE HELP!!! ‼️45 POINTS‼️


What happens to the temperature of the water when it begins to melt?
A. The temperature continues to decrease during the change of
state.
B. The temperature remains at 0°C until the change of state is
complete.
C. The temperature remains at 100°C until the change of state is
complete
D. The temperature continues to increase during the change of state.

Answers

It’s (c) have an awesome day or night

A. How many significant figures in the following?
4.80 x 10^6 =

Answers

Answer:

Number of Significant Figures: 3

The Significant Figures are 4 8 0

When thinking about valence electrons, how are the groups numbered? (more than one
answer)

Answers

The group number of a non-transition metal can be used to figure out how many valence electrons are in an atom of that metal. How many electrons are in an atom of an element that is part of this group? It means:

•In group 1, there is only one valence electron in it.

•There are two valence electrons in group 2.

•All three valence electrons in group 13 are in this group.

•When you look at group 14, there are 4 valence electrons.

•Five electrons in group 15 have the same number of valence electrons

•When you look at the group 16, there are 6 valence electrons in it.

•When you look at group 17, there are 7 valence electrons.
•When you look at the group 18, there are 8 valence electrons in it (except for helium, which has 2)

Once again, the group number of the element you are looking at can tell you its valence electrons, so keep that in mind. Even though you can usually follow a pattern when it comes to the transition metals, there isn't one. The group number will usually correspond to the range of possible valence electrons. They are:
There are three valence electrons in group 3.
•Group 4: 2 to 4 valence electrons in each of the three groups.

•There are 2 to 5 electrons in group 5.

•There are 2 to 6 electrons in group 6.

•Group 7: 2 to 7 valence electrons in each of the three groups.

•There are two or three electrons in group 8.

•Group 9: 2 or 3 electrons in the valence shell.

•Group 10: 2 or 3 electrons in the valence shell.

•valence electrons in group 11 can have one or two of them.

•When you look at group 12, there are two valence electrons in it.

•There's a good chance you did.

2. Which moon phase occurs directly before a
New Moon?
A. Waxing Crescent
B. First Quarter
C. Waning Crescent
D. Third/Last Quarter

If you can answer question 4 on the picture as well that will be helpful

Answers

2. C. The Waning Crescent Phase occurs before the New Moon.

4. D. We only see one side of the moon from Earth

Answer:

waxing crescent

and 4 nbr ans is C

How does the emission spectrum of the hydrogen atom provide evidence for the Bohr model of the atom

Answers

The fact that there are definite energy levels in the radiation spectra is known since light wavelength has been linked with the energy quantum (Einstein 1905 - Δ=ℎ.). These energy differences explain the reason why the spectrum of atoms is discontinuous (formed by spectral lines).
Bohr had the idea to link it to a change in the orbit radius of the electron around the nucleus (The idea that H atom could be formed by the association of one proton and one electron had been suggested a couple of years before by E. Rutherford).
This outstanding idea was perfected by a whole series of remarquable physicists in the years 1920–1930. It even continues to be refined to this day, where it forms the basis of atomic spectroscopy.

Enter an equation to show how h2po3− can act as a base with hs− acting as an acid. Express your answer as a chemical equation. Identify all of the phases in your answer.

Answers

The acid - base equation between H2PO3^- and HS^- is H2PO3^- +  HS^- ⇄S^- + H3PO3.

What is an acid?

An acid is a substance that can donate hydrogen ions while a base is a substance that can accept hydrogen ion. This is the acid base definition according to Brownstead - Lowry.

To show the acid - base relationship between H2PO3^- and HS^-, we have the equation;

H2PO3^- +  HS^- ⇄S^- + H3PO3

Learn more about acids and bases: https://brainly.com/question/10282816

Describe two ways of using solar energy.


Where is the production of hydroelectric energy practical?

Describe two ways to release biomass energy.

Describe two ways to use geothermal energy.

PLEASE ITS DUE IN 6 MINTUES

Answers

Answer:

There are three primary technologies by which solar energy is harnessed: photovoltaics (PV), which directly convert light to electricity; concentrating solar power (CSP), which uses heat from the sun (thermal energy) to drive utility-scale, electric turbines; and solar heating and cooling (SHC) systems, which collect ...

Hydropower is the most important and widely-used renewable source of energy. Hydropower represents about 17% (International Energy Agency) of total electricity production. China is the largest producer of hydroelectricity, followed by Canada, Brazil, and the United States (Source: Energy Information Administration).

There are four ways to release the energy stored in biomass: burning, bacterial decay, fermentation, and conversion to gas/liquid fuel.

Geothermal energy can heat, cool, and generate electricity: Geothermal energy can be used in different ways depending on the resource and technology chosen—heating and cooling buildings through geothermal heat pumps, generating electricity through geothermal power plants, and heating structures through direct-use ...

A balloon that had a volume of 3. 50 L at 25. 0°C is placed in a hot room at 40. 0°C. If the pressure remains constant at 1. 00 atm, what is the new volume of the balloon in the hot room?.

Answers

Ans : 3.33L

Solution:

V1/T1 = V2/T2
So, T2 = V2*T1/V1 = (3.50* 298)/313 = 3.33L

Here V1 = 3.50 L T1 = 25 degree C = 25+273 K =298 K
T2= 40 degree Celsius = 40+ 273 = 313K

How many moles of carbon dioxide gas occupy a volume of 81. 3.

Answers

Answer:

239

Explanation:

i think this is the answer

PLEASE HELP ME WITH THIS QUESTION THIS FREAKING SUCKS

A student dissolves 0.250 mol NaC1 in 2.05 kg H20. What is molality of the resulting solution? Show your work.

Answers

Answer:

m = 0.122 m

Explanation:

Molality(m): A measure of the number of moles of solute in a solution corresponding to 1 kg or 1000 g of solvent.

[tex]\mathrm{Molality\:Formula}:\quad \mathrm m = \dfrac{ mole\:of\:solute }{ mass\:of\:solvent\:in\:kg }[/tex]

[tex]\mathrm m = \dfrac{ mole}{ kg }[/tex]

[tex]\mathrm{Substitute\:the\:numbers\:into\:the\:"Molality\:Formula"}[/tex]

[tex]\mathrm m = \dfrac{ 0.250 }{ 2.05 }[/tex]

[tex]\mathrm{Divide\:0.250\:by\:2.05\:and\:get\:0.12195122}[/tex]

[tex]\mathrm m = {0.12195122}[/tex]

[tex]\mathrm{Round\:to\:the\:nearest\:thousandths\:place}[/tex]

[tex]\mathrm m = 0.122[/tex]

Answer:

To calculate the molality of the resulting solution, we need to use the formula:

Molality (m) = moles of solute / mass of solvent (in kg)

Given:

Number of moles of NaCl (solute) = 0.250 mol

Mass of H2O (solvent) = 2.05 kg

Step 1: Convert the mass of the solvent from grams to kilograms:

Mass of H2O = 2.05 kg

Step 2: Calculate the molality using the formula:

Molality (m) = moles of solute / mass of solvent (in kg)

Molality = 0.250 mol / 2.05 kg

Molality = 0.122 mol/kg

Therefore, the molality of the resulting solution is 0.122 mol/kg.

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help me please ┐(‘～`;)┌​

Answers

Answer: (2)react completely in the reaction

limiting reactant determines the number of moles in a chemical reaction

excess reactant is the reactant with an excess number of moles

Germanium has an atomic number of 32 and an atomic mass of 72.61. What is the total number of electrons in an atom of germanium?

Answers

Answer:

32

Explanation:

Because if the atomic number is 32 that is how many electrons are found in the element. There are 42 neutrons and 32 protons

Can someone please help me? :(

Answers

Answer:

glaciers

Explanation:

In mitosis, how does a daughter cell compare with its parent cell?
A.
A daughter cell and its parent cell are exact copies of each other.
B.
A daughter cell has twice as many chromosomes as its parent cell.
C.
A daughter cell has half as many chromosomes as its parent cell.
D.
A daughter cell has no similarity to its parent cell.

Answers

A. A daughter cell and its parent cell are exact
copies of each other.

Which statement best explains why animals have papillae?

Answers

I think it’s A but I’m not that sure

Answer:Papillae contain taste buds that help animals determine whether food is safe to eat.

Explanation:

could anyone possibly help me ┐(´ー｀)┌​

Answers

Answer:

Candela

Explanation:

The SI unit of luminous intensity is candela.It is written as Cd.

Note

If it's only intensity of radiant energy then the unit is W/m^2

Which use of pomace has become more available through new technologies?

A) animal feed
B) soil additives
C) landscaping mulch
D) food flavorings

Answers

Food flavorings as use of pomace has become more available through new technologies

What is a pomace?

This simply refers to a dry residue of a particular material from which a liquid is extracted. However, it is highly rich in nutrients such as:

Ursolic acidMineralsDietary fiberAntioxidants and many more...

So therefore, food flavorings as use of pomace has become more available through new technologies

Learn more about pomace:

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Calcium is a group 2 element. Chlorine is a group 7 element. They form an ionic compound called calcium chloride. In calcium chloride, for every one atom of calcium, how many atoms of chlorine will there be?

Answers

Answer:

2 ........... cuz CaCl2

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Can we use two past tense verbs together in a sentence?. Read the excerpt from In Another Country by Ernest Hemingway.The doctor told me that the majors wife, who was very young and whom he had not married until he was definitely invalided out of the war, had died of pneumonia. She had been sick only a few days. No one expected her to die. The major did not come to the hospital for three days. Then he came at the usual hour, wearing a black band on the sleeve of his uniform. When he came back, there were large framed photographs around the wall, of all sorts of wounds before and after they had been cured by the machines. In front of the machine the major used were three photographs of hands like his that were completely restored. I do not know where the doctor got them. I always understood we were the first to use the machines. The photographs did not make much difference to the major because he only looked out of the window.How does Hemingways decision to end the story of the major returning to the hospital after his wifes death contribute to the story's impact?Answers:1. It hints that the major mourned for his lost wife only for a brief few days before returning to his routine at the hospital, ending the story on an uncaring note.2. It emphasizes that the photographs are of no concern to the major because he doesnt expect the machine to make much difference, ending the story on a doubtful note.3. It suggests a sense of absurdity that the machine will revitalize the majors hand to what is shown in the photographs, ending the story on a patronizing note.4. It creates a sense of grief for the major not only for the loss of his wife but also the loss of his hand, ending the story on a tragic note. Judith built a fence to surround her property on a coordinate plane, the four corners of the fence are located at (-16,1), (-6,5), (4,1) and (-6,-3), which of the following most accurately describes the shape of the Judith's fence? PLEASEEE I NEED MORE ANSWERS Find the coordinates of the y-intercept and x-intercepts of the following. (image!) how do i say cow in french What is an analogy?a.a bleak outlook on lifec.a comparison using a form of the to be verbb.the study of the human bodyd.a comparison done by the reforming of words according to existing patterns 50 points!!Match the corresponding function formula with each function when h(x) = 3x + 2 and g(x) = 2^x. 1. K(x) = (3x)2 -x + 2 -x + 1 k(x) = g(x) h(x) 2. K(x) = 2 ^3x + 2 k(x) = g(x) h(x) 3. K(x) = 2^x - 3x - 2 k(x) = h(x) g(x)) 4. K(x) = 3(2 x) + 2 k(x) = h(x) g(x) 5. K(x) = 2^x + 3x + 2 k(x) = g(x) - h(x) 6. K(x) = 2^x(3x + 2) k(x) = g(x) + h(x) Complete the inequality showing the twoconsecutive integers between which 125 lies. Enter your answers in the boxes. A statistician wants to determine the relationship between typing speed, in words per minute, and the time, in minutes, it takes to type one page of a specific book. Twenty-five trials are completed and the correlation coefficient between typing speed and time is determined to be -0.622. Therefore, slower typing speed was related to greater time. How is the correlation affected if the units for time are changed from minutes to seconds easy question, please help When selecting a section of an object to draw what should you look for?A. An area with lots of colorsB. Something with a variety of colors, values, andlor texturesC. Something with bright lightsD. An image that is flat and dull What is a petals reproductive function?PLEASE GIVE A WELL WRITTEN ANSWERNo gooogle Which of the following states that energy cannot be created or destroyed? A charge of 8. 5 106 C is in an electric field that has a strength of 3. 2 105 N/C. What is the electric force acting on the charge?. The graph shows the number of people at various stages of engagement in HIV care.A graph shows stage of engagement in H I V care on the horizontal axis and number of individuals on the vertical axis. 1,106,400 people are H I V infected. 874,056 people are H I V diagnosed. 655,542 people are linked to H I V care. 437,028 people are retained in H I V care. 349,622 people need antiretroviral therapy. How many people were linked to HIV care?874,056437,028655,542262,217 A student performed row operations on a matrix as shown below.4124-420-131-131324530107Which operations did the student perform?2R2+R3 R3O 2R3+-R3 > R3 Find the value of each trigonometric ratio. Express as fraction Date: Page: 1. Give short introduction to democratic conduct - How.can the democratic conduct help to institotionale the democracy? write your opinion ? Learning Task 6: Answer this on your notebook. 1. What is a graphic design? 2. What is a poster? 3. How can you show your creativeness in making a poster? 4. How can you appreciate the beauty of art in making a poster? 5. If you are a graphic designer, what would you like your poster to befamous for?