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4 years ago

In the reaction

Chemistry

2 answers:

user100 [1]4 years ago

7 0

Answer:

a) KOH

Explanation:

In the given balanced reaction

2K + 2H2O → 2KOH + H2

In the compound KOH,

The elements are K,O, and H and in the compound, there is one mole each of K , O ,and H.

So the element ratio here is 1 : 1 : 1.

Vitek1552 [10]4 years ago

3 0

<u>Answer:</u> The compound that has element ratio of 1 : 1 : 1 is KOH

<u>Explanation:</u>

Mole ratio is defined as the ratio of number of moles of the two elements combining to form a compound.

In a chemical compound, the subscripts represents the number of moles of elements in a compound.

For the given chemical reaction:

$2K+2H_2O\rightarrow 2KOH+H_2$

$H_2O$ has two elements, hydrogen and oxygen and is present in the ratio of 2 : 1

KOH has three elements, potassium, hydrogen and oxygen and is present in the ratio of 1 : 1 : 1

Hence, the compound that has element ratio of 1 : 1 : 1 is KOH

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levacccp [35]

Answer:

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Explanation:

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2 years ago

The mystery of periodic law was solved when __________ proposed his planetary atomic model of the atom, providing an understandi

Verdich [7]

1. A) Bohr

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4 years ago

Read 2 more answers

professor190 [17]

Answer:

ANswers is simply

Explanation:

8.73kJ

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4 years ago

If 30cm³ of 0.45 mol dm3 HCl reacted with NaOH, how many moles of HCl reacted?

77julia77 [94]

Moles HCl reacted : 0.0135

<h3>Further explanation</h3>

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

$\large {\boxed {\bold {M ~ = ~ \dfrac {n} {V}}}$

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

So to find the number of moles can be expressed as

n = V x M

The volume of HCl 30 cm³=3.10⁻² dm³

Molarity of HCl = 0.45 mol/dm³

so moles HCl reacted :

$\tt n=3.10^{-2}\times 0.45=0.0135$

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3 years ago

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n200080 [17]

The vertical component of velocity is zero

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3 years ago

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