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Gnesinka [82]
3 years ago
10

Which statements correctly match a chemical name with its formula? Use the list of polyatomic ions and the periodic table to hel

p you answer.
The chemical formula for ammonium carbonate is NH4HCO3.
The chemical formula for ammonium hypochlorite is NH4ClO.
The chemical formula for ammonium nitrate is NH4NO3.
The chemical formula for ammonium phosphate is NH4(PO4)3.
The chemical formula for ammonium sulfate is (NH4)2SO3.

Chemistry
2 answers:
lina2011 [118]3 years ago
7 0

Answer : The correct statements are,

The chemical formula for ammonium hypochlorite is NH_4ClO.

The chemical formula for ammonium nitrate is NH_4NO_3.

The chemical formula for ammonium sulfate is (NH_4)_2SO_3.

Explanation :

Polyatomic ions : It is a charged species that composed of two or more atoms and these charged species are bonded by the covalent bond.

(1) The chemical formula for ammonium carbonate is (NH_4)_2CO_3.

This formula is formed when the 2 ammonium ion combine with 1 carbonate ion.

(2) The chemical formula for ammonium hypochlorite is NH_4ClO.

This formula is formed when the 1 ammonium ion combine with 1 chloride ion and 1 oxide ion.

(3) The chemical formula for ammonium nitrate is NH_4NO_3.

This formula is formed when the 1 ammonium ion combine with 1 nitrate ion.

(4) The chemical formula for ammonium phosphate is (NH_4)_3PO_4.

This formula is formed when the 3 ammonium ion combine with 1 phosphate ion.

(5) The chemical formula for ammonium sulfate is (NH_4)_2SO_3.

This formula is formed when the 2 ammonium ion combine with 1 sulfate ion.

klasskru [66]3 years ago
3 0

Answer : The correct statements are,

The chemical formula for ammonium hypochlorite is NH_4ClO.

The chemical formula for ammonium nitrate is NH_4NO_3

Explanation :

Ionic compound : It is defined as the compound which is formed when electron gets transferred from one atom to another atom.

All the polyatomic ions always form an ionic compound.

Polyatomic ions : It is a charged species that composed of two or more atoms and these charged species are bonded by the covalent bond.

(1) The chemical formula for ammonium carbonate.

The given compound ammonium carbonate is an ionic compound. It is made up of two different ions which are ammonium ion (NH_4^+) and carbonate ion (CO_3^{2-}) by the criss-cross method. Thus, the correct chemical formula for ammonium carbonate is (NH_4)_2CO_3.

(2) The chemical formula for ammonium hypochlorite.

The given compound ammonium hypochlorite is an ionic compound. It is made up of two different ions which are ammonium ion (NH_4^+) and hypochlorite ion (ClO^{-}) by the criss-cross method. Thus, the correct chemical formula for ammonium hypochlorite is NH_4ClO.  

(3) The chemical formula for ammonium nitrate.

The given compound ammonium nitrate is an ionic compound. It is made up of two different ions which are ammonium ion (NH_4^+) and nitrate ion (NO_3^{-}) by the criss-cross method. Thus, the correct chemical formula for ammonium nitrate is NH_4NO_3.  

(4) The chemical formula for ammonium phosphate.

The given compound ammonium phosphate is an ionic compound. It is made up of two different ions which are ammonium ion (NH_4^+) and phosphate ion (PO_4^{3-}) by the criss-cross method. Thus, the correct chemical formula for ammonium phosphate is (NH_4)_3PO_4.  

(5) The chemical formula for ammonium sulfate.

The given compound ammonium sulfate is an ionic compound. It is made up of two different ions which are ammonium ion (NH_4^+) and sulfate ion (SO_4^{2-}) by the criss-cross method. Thus, the correct chemical formula for ammonium sulfate is (NH_4)_2SO_4.  

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A substance has a volume of 20mL and a density of 2.5 g/mL. what is it’s mass?
DochEvi [55]
2.5X20=50g
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3 years ago
CO2 <br><br> element <br><br><br> number x Atomic mass =total mass
MaRussiya [10]

Answer:

Number= 6

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2 years ago
Balance the following equations: (c) H2(g)+I2(s)⟶HI(s)H2(g)+I2(s)⟶HI(s)
kenny6666 [7]

Answer: H_2(g)+I_2(g)\rightarrow 2HI(s)

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

Thus in the reactants, there are 2 atoms of hydrogen and 2 atoms of iodine .Thus there has to be 2 atoms of hydrogen and 2 atoms of iodine in the product as well. Thus a coefficient of 2 is placed in front of HI.

The balanced chemical reaction is:

H_2(g)+I_2(g)\rightarrow 2HI(s)

6 0
3 years ago
Car manufacturers are developing engines that use H₂ as fuel. In Iceland, Sweden, and other parts of Scandinavia, where hydroele
weeeeeb [17]

If the coulombs are supplied at 1.44 V, then 4.766 × 10¹¹ joules are produced.

(a) The reaction is

2H₂O + 2e⁻ → H₂ + 2OH⁻

According to the reaction, 2 moles of electrons flow per mole of reaction,

(b) Given

T = 25°C

Change Celsius into Kelvin

T = 25°C

   = (25 + 273 ) K

   = 298 K

<h3>What is Ideal Gas Law ?</h3>

It is expressed as

PV = nRT

Hence ,

n = \frac{PV}{RT}

   = \frac{(12)(3.5.10^{6} )}{(0.082057)(298)}

   = 1.7176 ×10⁶ mole

Now, From the given reaction we can say that ,1 mole of H₂  is produced by 2 moles of electron

Hence, 1.7176 × 10⁶ mole of H₂ is produced by

= 2 × 1.7176 × 10⁶ moles of  electron

= 3.435 ×10⁶ moles of electron

We know that

charge = moles of electron × F

          =  (3.435 ×10⁶ × 96500) C

           =  3.31 × 10¹¹ C

(c) We know that,

Voltage = \frac{energy}{charge}  =  \frac{J}{C}

1.44 V = \frac{energy}{3.31 . 10^{11} }

Energy = 1.44 V × 3.31 × 10¹¹ C

            =  4.766 × 10¹¹ Joules

Thus from the above conclusion we can say that, coulombs are supplied at 1.44 V, then 4.766 × 10¹¹ joules are produced.

Learn more about Fuel Cell here : brainly.com/question/16612142

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Disclaimer : The question given was incomplete on portal, Here is the complete question.

Question : Car manufacturers are developing engines that use H₂ as fuel. In Iceland, Sweden, and other parts of Scandinavia countries, where hydroelectric plants produce inexpensive electric power, the H₂ can be made industrially by the electrolysis of water.

a) How many moles of electrons flow per mole of reaction ?

b) How many coulombs are needed to produce 3.53X10⁶ L of H₂ gas at   12.0 atm and 25°C.

c) If the coulombs are supplied at 1.44 V, how many joules are produced?

8 0
1 year ago
What is the percent composition by mass of hydrogen in nh4hco3
Simora [160]

<u>Answer:</u> The percent composition by mass of hydrogen in given compound is 6.33 %

<u>Explanation:</u>

We are given:

A chemical compound having chemical formula of NH_4HCO_3

It is made up by the combination of 1 nitrogen atom, 5 hydrogen atoms, 1 carbon atom and 3 oxygen atoms

To calculate the percentage composition by mass of hydrogen in the compound, we use the equation:

\%\text{ composition of Hydrogen}=\frac{\text{Mass of hydrogen}}{\text{Mass of compound}}\times 100

Mass of compound = [(1\times 14)+(5\times 1)+(1\times 12)+(3\times 16)]=79g/mol

Mass of hydrogen = (5\times 1)=5g/mol

Putting values in above equation, we get:

\%\text{ composition of Hydrogen}=\frac{5g/mol}{79g/mol}\times 100=6.33\%

Hence, the percent composition by mass of hydrogen in given compound is 6.33 %

6 0
3 years ago
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