Write a net ionic equation for the reaction that occurs when excess hydroiodic acid and chromium(II) carbonate (s) are combined.
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Answer:

6 moles

Explanation:

First find the balanced equation for the rxn

N2     + 3 H2   ===>  2  NH3

each mole of N2  requires  3 moles of Hydrogen

so 6 moles of H needed

The curious and observant are the words in the story which helps the reader understand the meaning of the word avid.

This refers to when an individual is very enthusiastic or interested in something.

In paragraph 1 , the words which makes us understand the word 'avid' is the character being curious and observant which shows there is interest.

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Answer:

I would say 4.) Biomass

Explanation:

This looks like the best possible answer because it is plant based. Worst case scenario we could run out of plants. In comparison, wind will pretty much always be around along with wave/tidal power and solar.

The rate of reaction of the magnesium ribbon in the dilute hydrochloric acid is 0.067 g/s.

Rate of reaction is the rate at which a reaction takes place. It is proportional to the increase in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time.

Mg(s) + 2HCI = MgCl2(aq) + H2(g)

Rate of reaction = mass of magnesium reacted/time taken

Rate of reaction =  2 g /30 s

Rate of reaction =  0.067 g/s

Thus, the rate of reaction of the magnesium ribbon in the dilute hydrochloric acid is 0.067 g/s.

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Sovereignty is the ultimate authority, in the decision-making process of the state and in the maintenance of law and order.

Sovereignty refers to authority within an individual consciousness or territory. Sovereignty entails hierarchy within the state and also for external autonomy for states.

So we can conclude that sovereignty is the ultimate authority, in the decision-making process of the state and in the maintenance of law and order.

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Answer:

CS2 + 3O2 -> CO2 + 2SO2

Explanation:

Answer:

137 g

Explanation:

Since1 L=103  mLyou can say that your sample must contain 550.0mL solution⋅1.50 moles KI103mL solution=0.825 moles KITo convert the number of moles of potassium iodide to grams, use the molar mass of the compound.0.825moles KI⋅166.003 g1mole KI=137 g−−−−−

Answer:

The ammonia molecule is a trigonal pyramidal and has 4 sp3 orbitals

Explanation:

Nitrogen has 5 valence electrons, Hydrogen takes up 3 bonds and there's a lone pair on top, and the gemoetry is structured in a way so the hydrogen atoms are facing down away from the lone pair and evenly spaced out between the other hydrogens.

The simile in stanza 1 (lines 1-6) shows that the speaker:

"feels torn between two different worlds that have little in common" (Option  B)

Why does the speaker feel torn between two different worlds?

She speaker feels torn between two different worlds because the two worlds speak different languages.

It is to be noted that a simile is a figure of speech that compares two different things making use of the word "as".

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For 5ml of coffee into 15ml of water, the dilution of the coffee  is mathematically given as

X=0.25ml

Generally, the equation for the Total volume  is mathematically given as

Tv =inital v+final volume

Therefore

Tv=5ml+15ml

Tc=20ml

In conclusion, Ther extent of diluti\on is

X=5/20ml

X=0.25ml

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Answer:

the spiral type of galaxy

Our earth is situated in the Milky Way galaxy. The Milky Way galaxy is a spiral galaxy. Therefore, the correct option is option C.

The Milky Way constellation is indeed a huge spiral formation containing hundreds of trillions of stars, along with the Sun. the irregularly formed belt of stars and gas clouds visible from Earth that spans the sky. despite the reality that Earth is positioned within the Milky Way constellation, astronomers do not completely understand its nature, despite its proximity with other external star systems.

A dense layer of interstellar dust obscures the majority of the Galaxy from optical observatories, and astronomers can only understand its massive building with the assistance of radio and infrared telescopes, which can detect the forms of light that may travel through the obscuring material. Our earth is situated in the Milky Way galaxy. The Milky Way galaxy is a spiral galaxy.

Therefore, the correct option is option C.

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Answer:

i belive it is A

Explanation:

well if it olny lives in those scrub habitats and the habitats get desroyed or polluted they will no longer be habitable there fore causeing the scrub jay to go exctinct.

Answer:

Mountains, Hills and Rivers

Explanation:

Because I read it and I already know that

Hope that helps!

Answer:

Mountains, Hills and Rivers

Explanation:

The solution would be like this for this specific problem:

Moles of carbon = 58.8 / 12 = 4.9

Moles of hydrogen = 9.8 / 1 = 9.8

Moles of oxugen = 31.4 / 16 m= 1.96

Ratio 4.9 / 1.96 = 2.5 9.8 / 1.96 = 5.0 1.96 / 1.96 = 1

Simplest formula = C5H10

I hope this helps and if you have any further questions, please don’t hesitate to ask again.

Answer: I believe its 1 but i'm not sure

Explanation:

Answer:

a. <1.0

b. 1.30

c. 3.00

d. 11.00

e. 12.70

Answer:

It is:

55

Mn

25

The enthalpy tell us about the heat that may be absorbed or evolved in a reaction. The ethalpy of this reaction is -100 kJ/mol.

The term enthalpy deals with the heat that is absorbed or emitted in a reaction. The reaction equation is; HNO3 + KOH ----> KNO3 + H2O

Number of moles of HNO3 = 0.5 M * 50/1000 L = 0.025 moles

Number of moles of KOH= 0.5 M * 50/1000 L = 0.025 moles

Since the reaction is 1:1, then heat evolved = - (2500 J * 10^-3)/0.025 moles

= -100 kJ/mol

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We can infer about the given information of lotion is that pH is slightly acidic in nature.

pH of any solution gives idea about the acidity or basicity of that solution, and it will be calculated as:

pH = -log[H⁺]

pH value in the range of 0 to 6.9 shows acidity, 7 shows the neutral nature and from 7.1 to 14 shows basicity. Given pH value of lotion i.e. 6.25 states that lotion is slightly acidic in nature.

Hence pH value of lotion informs that lotion is slightly acidic.

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Answer:

Combustion. It is combustion since we assume that it is in a rigid container and Na reacts with oxygen gas

Answer:

About 64 grams of KClO₃.

Explanation:

Potassium chlorate dissociates according to the equation:
[tex]\displaystyle 2\text{KClO$_3$} \xrightarrow{\text{heat}} 2\text{KCl} + 3\text{O$_2$}[/tex]

To determine the amount of KClO₃ necessary to produce 25 grams of O₂, we can convert grams of O₂ to moles; moles of O₂ to moles of KClO₃;  and finally to grams of KClO₃.

The molecular weights of O₂ and KClO₃ are 16.00 g/mol and 122.55 g/mol.

Hence:

[tex]\displaystyle 25\text{ g O$_2$} \cdot \frac{1\text{ mol O$_2$}}{32.00\text{ g O$_2$}} \cdot \frac{2\text{ mol KClO$_3$}}{3\text{ mol O$_2$}} \cdot \frac{122.55\text{ g KClO$_3$}}{1\text{ mol KClO$_3$}} = 64\text{ g KClO$_3$}[/tex]

In conclusion, about 64 (to two significant digits) grams of KClO₃ is needed.

Answer:

49% say human activitiy contributes global warming.

Answer:

The answer is 68%

Explanation:

including me :)

The volume of gas occupied by 11 grams of nitrogen dioxide gas at STP is 5.15 L.

Ideal gas equation of any gas will be writen as:

PV = nRT, where

P = standard pressure = 1 atm

V = volume = ?

R = universal gas constant = 0.082 L.atm/K.mol

T = standard temperature = 273K

n is the moles of gas which can be calculated by using below equation as:

n = W/M, where

W = given mass = 11g

M = molar mass = 46 g/mol

n = 11 / 46 = 0.239mol

On putting values on the above equation, we get

V = (0.23)(0.082)(273) / (1) = 5.15 L

Hence required volume of gas is 5.15 L.

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should be Chromium(III) sulfate:  Cr₂(SO₄)₃

the oxidation number:

Cr₂(SO₄)₃ = 0

Cr = +3

SO₄ = -2

S + 4.O = -2

S + 4.-2 = -2

S = +6

The molarity of the sample of the salt dissolved in the solution is determined as 0.1 M.

The molarity of the sample is the number of solutes dissolved in liters solution.

molarity = number of moles/Liters of solution

molarity = 0.2 moles / 2L

molarity = 0.1 M

Thus, the molarity of the sample of the salt dissolved in the solution is determined as 0.1 M.

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Answer:

60 days

Explanation:

2500 = 40000 ( 1/2) ^n

n = 4 half lives

4 half lives * 15 days/ halflife = 60 days

Answer:

Explanation:

Answer:

warmed by the Earth's surface

the lowest layer

Explanation:

Answer:

To solve the problem, enter the concentration of the hydrogen ion. The pH of a 0.025 M solution of Hydrobromic Acid is 1.602.

Answer:

b did the test

Explanation:

did the test

A balanced chemical equation obeys the law of conservation of mass. The reaction of HCl with Ca(OH)₂ is a weak base - strong acid reaction. The products formed are CaCl₂ and H₂O. The correct option is D.

A chemical equation in which the number of reactants and products on both sides of the equation are equal is defined as the balanced chemical equation. The coefficients are the numbers which are added to balance the chemical equation.

The balanced equation for the reaction of HCl with Ca(OH)₂ is given as:

Ca (OH)₂ (s) + 2HCl (aq) → CaCl₂ (aq) + 2H₂O (l)

Here one mole of Ca (OH)₂ reacts with two moles of HCl and gives one mole of CaCl₂ and two moles of H₂O respectively. Here Ca (OH)₂ is a white precipitate and HCl is a aqueous solution.

Thus the correct option is D.

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