lewis structure of HONO2 (HNO3)

Answer:

[tex]Molecular \: mass \: of \: C _{2}H _{4} O_{2}.2H_{2}O , \\ \\ ⇢ 12 \times 2 + 4 \times 1 + 16 \times 2 + 2(2 \times 1 + 16) \\ \\⇢ 24 + 4 + 32 + 36 \\ \\ ⇢ 96g[/tex]

[tex]\bold\pink{Percentage \: of \: substance \: in \: compound ,} \\ \\ \bold\pink{ ⇢ \frac{mass \: of \: substance}{mass \: of \: compound \times 100}}[/tex]

[tex]\%\:age \: of \: water \: (H_{2}O) = \frac{36}{96} \times 100 \\ \\ ⇢ 0.375 \: \times 100 \\ \\\fbox\red{\: ⇢ 37.5\%\:}[/tex]

hope helpful ~

Yes, the chemical reaction occurs because new substance is formed and heat energy is released.

Chemical reaction is a process in which one or more substances i.e. the reactants, are converted to one or more different substances i.e. the products so we can conclude that the chemical reaction occurs because new substance is formed and heat energy is released.

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Answer:

the answer is a A

Explanation:

Answer:

Compare

Explanation:

Answer:

[tex]2HNO_2(aq)+Ca(OH)_2(aq)\rightarrow H_2O(l)+Ca(NO_2)_2(aq)[/tex]

Explanation:

Hello.

In this case, considering that the reaction between nitrous acid and calcium hydroxide yield both water and calcium nitrite as a neutralization chemical reaction:

[tex]HNO_2(aq)+Ca(OH)_2(aq)\rightarrow H_2O(l)+Ca(NO_2)_2(aq)[/tex]

As it is not balanced due to the two nitrites at the right, we obtain:

[tex]2HNO_2(aq)+Ca(OH)_2(aq)\rightarrow H_2O(l)+Ca(NO_2)_2(aq)[/tex]

Which means that 2 before the nitrous acid balance both nitrogen and oxygen.

Regards.

Answer:

33%

Explanation:

Since there is only 1 particle for each element in the molecule, 100/ by 3 is 33.

Answer:

Don't know if the answer is correct or not.

There will be 24 atoms of hydrogen

Explanation:

for H2O there is 2 atoms

Therefore:

12×2=24

The molecular shape of a Cl₂CO molecule is (E) Bent. Option E

Cl₂CO, which is also called carbonyl chloride or phosgene, is a molecule made up of one carbon atom (C), two chlorine atoms (Cl), and one oxygen atom (O) attached to the carbon atom. The Lewis structure of  Cl₂CO shows that the oxygen atom has two sets of unshared electrons. This makes the molecule have a curved shape.

The reason why  Cl₂CO has a bent shape is because the lone pairs on the oxygen atom push the bonded atoms away more than the shared pairs of electrons. Because of this, the two Cl atoms move closer to each other. This causes the bond angle to be less than 180 degrees and makes the molecule have a bent shape.

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hello ; i don't understand your answer Explanation:

Answer:

[tex]\huge\boxed{\sf 6x}[/tex]

Explanation:

[tex]\sf x+ 2x + 3x\\\\Take\ x\ common\\\\x(1+2+3)\\\\x(6)\\\\\bold{6x}\\\\ \rule[225]{225}{2}[/tex]

Hope this helped!

Answer:

The given  metal is beryllium.

Explanation:

Given data:

Mass of metal = 74 g

Volume of metal = 40 cm³

Which metal is this = ?

Solution:

First of all we will calculate the density.

it is mass divided by volume.

d = m/v

d = 74 g/40 cm³

d = 1.85 g/cm³

In literature it is given that the density of beryllium is 1.85 g/cm³. Thus given  metal is beryllium.

Answer:

23 atoms

Explanation:

Krypton (Kr) exists naturally as a mixture of six isotopes with atomic number of 36. These six isotopes occupy different percentages of the mixture. Below is a list of the isotopes and there percentage in a given mixture

1) Krypton-78 (⁷⁸Kr) ⇒ 0.35%

2) Krypton-80 (⁸⁰Kr) ⇒ 2.25%

3) Krypton-82 (⁸²Kr) ⇒ 11.6%

4) Krypton-83 (⁸³Kr) ⇒ 11.5%

5) Krypton-84 (⁸⁴Kr) ⇒ 57%

6) Krypton-86 (⁸⁶Kr) ⇒ 17.3%

To determine the amount of ⁸³Kr present in a mixture of 200 atoms of krypton, you will multiply the it's percentage of occurrence in nature by the amount of atoms in a given mixture

11.5/100 × 200 = 23 atoms

Hence, there should be 23 atoms of krypton-83 in the mixture of 200 atoms of Krypton.

Answer:

latent

Explanation: its latent.

Answer:

latent

Explanation:

Answer:

no

Explanation:

The key difference between atomic mass and average atomic mass is that the atomic mass is the mass of an atom, whereas the average atomic mass is the mass of an atom of a particular chemical element calculated by considering isotopes of that element.

Answer:

Acids

Explanation:

i tested it and it is acids. hope this helps :)

Answer:

The density of beryllium is 1.85 g/cm³. Thus given metal is beryllium.

Explanation:

Given data:

Mass of metal = 37 g

Volume of metal = 20cm³

Which metal is this = ?

Solution:

We will solve this problem by using density formula. After finding density we will check from literature which metal has a density similar to our calculated density.

d = m/v

d = 37 g/ 20cm³

d = 1.85 g/cm³

The density of beryllium is 1.85 g/cm³. Thus given metal is beryllium.

metallic characteristics:

lustrous

solid at room temperature

in-between characteristics:

amphoteric

semiconducting

nonmetallic:

brittle

Explanation:

i took the instruction got then right :)

The metallic characteristics are lustrous, solid at room temperature

The in-between characteristics are amphoteric and semiconducting.

The nonmetallic characteristics is brittle.

The elements whose properties are intermediate of metals and non-metals is called metalloid.

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Don't look in the comments

Answer:D

Explanation:I think

Answer:

750 ml

Explanation:

Given parameters:

Number of students in the class = 15

Volume of solution needed per student  = 50ml

Unknown:

Volume of solution needed for the whole class = ?

Solution:

 The total volume needed for the class;

         = number of students x volume of solution per student

         = 15 x 50

          = 750ml

The volume of solution needed by the teacher for the whole class is 750mL

Answer:

1. Atmosphere ⇒ Ocean ⇒ Marine Plants ⇒ Sediments ⇒ Natural Gas .

2. Atmosphere ⇒ Land Plants ⇒ Natural Gas.

Explanation:

Hello,

In this case, it is widely known there are two ways in which natural gas is formed:

1. Atmosphere ⇒ Ocean ⇒ Marine Plants ⇒ Sediments ⇒ Natural Gas .

In this one, the carbon dioxide in the atmosphere, is able to get through the ocean and in touch with marine plants which have the capacity to undergo photosynthesis and yield sugars which are subsequently fixated in the soil as sediments containing fossil fuels, coal and/or natural gas.

2. Atmosphere ⇒ Land Plants ⇒ Natural Gas.

In this one, the carbon dioxido also in the atmosphere is captured by the land plants which use it to undergo photosynthesis and subsequently fix it into the underground as fossil fuels, coal and/or natural gas as well.

Best regards.

Natural gas occurs naturally in the atmosphere and includes various forms of gases. Natural gases are formed from the atmosphere through the ocean or land.

The carbon cycle is the pathway of the formation and its flow in the different spheres of the planet.

The first pathway of the natural gas formation is explained as:

The natural gas or the carbon dioxide from the air or the atmosphere moves towards the ocean and marine plants that use them in the photosynthesis that laters get fixed as sediments in the ocean beds.

The second pathway of the natural gas formation is explained as:

The carbon dioxide from the air moves towards the land and is captured by the plants to use as reactants in process of photosynthesis. The carbon captured by the plant is fixed as fossils in the underground soil.

Therefore, natural gas can be formed by land and oceanic plants.

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Answer:

The concentration of KOH solution is 17.009 moles/litre or 17.009M .

Explanation:

Here , the given reaction is -

[tex]2KOH +H_{2}SO_{4}$\rightarrow$K_{2}SO_{4}+2H_{2}O[/tex]

 2moles of KOH requires 1mole for complete neutralisation.

Therefore ,

2 x number of moles of KOH = 1 x number of moles of [tex]H_{2}SO_{4}[/tex]

2 x (molarity of KOH x volume of KOH) = (Molarity of [tex]H_{2}SO_{4}[/tex] x volume of

[tex]H_{2}SO_{4}[/tex])

1 mole of [tex]OH^- $\rightarrow$[/tex] 1mole of [tex]H^+[/tex]

Molarity (KOH) = concentration (c)

volume (KOH) =15.05ML

Molarity ([tex]H_{2}SO_{4}[/tex] ) = 5.0 M

Volume of ( [tex]H_{2}SO_{4}[/tex] ) = 25.6ML

[tex]\frac{1\times(C \times15.05ml)}{OH^-} = \frac{(2\times 25.6 \times 5)}{H^+}[/tex]

C = [tex]\frac{0.2\times25.6\times5}{15.05}[/tex]

C= 17.009 moles/litre

Hence , the concentration of KOH solution is 17.009 M or moles/litre .

Answer:

0.027mole

Explanation:

Answer:

Increasing the temperature

Partial pressure is the pressure exhibited by a single gas when present alone in a system. According to Le's principle, the partial pressure of B can be raised by increasing temperature. Thus, option C is correct.

Le's principle states the shift in the position of the equilibrium when the reaction system is disturbed by some factors. The pressure, temperature, and concentration are the factors that affect the equilibria of the reaction mixture.

According to the ideal gas equation and Le's principle, the pressure of the system directly depends on the temperature. As the temperature of the system is raised the partial pressure of the reactant (B) will increase, and the reaction will move in the forward direction.

Therefore, the increase in the temperature increases the partial pressure of the gas.

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Given the two different titration reactions, the volume of NaOH required to reach the equivalence point of both reaction will be different.

Balanced equation

HNO₃ + NaOH —> NaNO₃ + H₂O

From the balanced equation above,

MaVa / MbVb = nA / nB

(1 × 10) / (1 × Vb) = 1

10 / Vb = 1

Cross multiply

1 × Vb = 10

Vb = 10 mL

Balanced equation

H₂SO₄ + 2NaOH —> Na₂SO₄ + 2H₂O

From the balanced equation above,

MaVa / MbVb = nA / nB

(1 × 10) / (1 × Vb) = 1/2

10 / Vb = 1/2

Cross multiply

1 × Vb = 10 × 2

Vb = 20 mL

From the above calculations, we can conclude that different volume of NaOH will be required for the different reaction.

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Answer:

1.8 moles of H20

Explanation:

The balanced equation gives you the ratio of moles.

so you then have to say the number of moles of the substance you have multiplied by the the ratio of what you are looking for to what you have.

The ratio should be written in the form of a/b (fraction)

0.90 moles of H₂O are formed from 0.60 moles of C₂H₆.

From the balanced equation, we can see that the stoichiometric ratio between C₂H₆ and H₂O is 2:6. This means that for every 2 moles of C₂H₆ reacted, 6 moles of H₂O are formed.

Given that we have 0.60 moles of C₂H₆, we can use this ratio to calculate the corresponding moles of H₂O.

(0.60 moles C₂H₆) x (6 moles H₂O / 2 moles C₂H₆) = 1.80 moles H₂O

Therefore, 0.60 moles of C₂H₆ will produce 1.80 moles of H₂O according to the stoichiometry of the balanced equation.

However, it's worth noting that the given balanced equation doesn't match the stoichiometry usually seen for the combustion of ethane (C₂H₆). The typical balanced equation for the complete combustion of ethane is:

C₂H₆ + 7/2 O₂ -> 2 CO₂ + 3 H₂O

In this case, 0.60 moles of C₂H₆ would produce 0.90 moles of H₂O according to the stoichiometry of the balanced equation.

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Answer:

Explanation:

The reaction that is described goes as follows:

2AgCl + Mg(OH)2 ---> MgCl2 + 2AgOH

The precipitate here is the MgCl2 salt.

I hope it helped!

Answer:

Explanation:

Molar weight of HCl is 36.46g/mole

The reaction requires 0.73 g of HCl so it requires

0.73/36.46 = 0.02 mole of HCl

Molarity of HCl is 4.0M = 4mole/liter

0.02/4 = 0.005L = 5mL

5 mL of HCl solution should be used.

Answer:

I believe your answer would be Perio

Explanation:

Answer:

Periods :)

Explanation:

I dont know if thats what youre asking but thats what theyre called, there isnt another name

Answer:

:)

Explanation: