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3 years ago

Complete and balance the following symbol equation, and add state symbols

Chemistry

1 answer:

erastovalidia [21]3 years ago

5 0

Answer:

2NaOH + H2So4 》Na2So4+ 2H2O

Explanation:

SODIUM HYDROXIDE, 2NaOH IS (aq)

FULFURIC ACID, H2So4 IS (aq)

SODIUM SULFATE, Na2So4 IS (aq)

WATER,2H20 IS (l)

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The blue colour of the sky results from the scattering of sunlight by air molecules. Blue light has a frequency if about 7.5*10^

erastovalidia [21]

Answer: The energy of a mole of photon associated with this frequency is $49.5\times 10^{-20}J$

Explanation:

The energy and frequency are related by :

$E=N\times h\times \nu$

E = energy of photon

N = number of moles = 1

h = planks constant = $6.6\times 10^{-34}Js$

$\nu$ = frequency = $7.5\times 10^{14}Hz$

$E=1\times 6.6\times 10^{-34}Js\times 7.5\times 10^{14}s^{-1}=49.5\times 10^{-20}J$

The energy of a mole of photon associated with this frequency is $49.5\times 10^{-20}J$

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3 years ago

This chemical equation represents the burning of methane, but the equation is incomplete. What is the missing coefficient in bot

Zolol [24]

CH4+(x)O2=CO2 +(Y)H2O
C=1 +H=4 +O=? = C=1 +O=2+? +H=?
H=4>>Y=2
C=1 +H=4 +O=? = C=1 +O=(2+2) +H=4
C=1 +H=4 +O=4 = C=1 +O=4 +H=4
O=4>>X=2
CH4+(2)O2 =CO2 +(2)H2O

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3 years ago

Read 2 more answers

What bond forms from an unequal sharing of electrons between atoms in a molecule? a nonpolar covalent bond a hydrophobic interac

love history [14]

Sharing of electrons always means its a covalent bond, and unequal means it is polar, so it is a polar covalent bond

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4 years ago

When an aqueous solution of silver nitrate is

Andre45 [30]

Answer:

$K^{+}$ and $NO_{3}^{-}$

Explanation:

The equation for the reaction is AgNO3(aq) + KCl(aq) ==> AgCl(s) + KNO3(aq)

With all the ions, it is

$Ag^{+}$ (aq) + $NO_{3} ^{-}$ (aq) + $K^{+}$ (aq) + $Cl^{-}$ (aq) ==> AgCl(s) +

$K^{+}$ and $NO_{3} ^{-}$ do not change, so they are the spectator ions and are removed

The ionic equation is:

$Ag^{+}$ (aq) + $Cl^{-}$ (aq) ==> AgCl(s)

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3 years ago

How many Liters of space will a 70.0g sample of CO2 occupy?

Tanzania [10]

Answer:

35.6 liters at STP

Explanation:

The molar mass of carbon dioxide is about 44.01 g/mol. The volume of a mole of ideal gas at STP is 22.4 L, so the volume of 70.0 g will be ...

(70.0g)/(44.01 g/mol)·(22.4 L/mol) ≈ 35.6 L

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3 years ago