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3 years ago

1,645.6 expressed in scientific notation equals?

Chemistry

2 answers:

12345 [234]3 years ago

8 0

1.6456 x 10^3 (ten to the third power)

gizmo_the_mogwai [7]3 years ago

6 0

Answer : The correct representation is, $1.6456\times 10^{3}$

Explanation :

Scientific notation : It is defined as the method or a way or representation of expressing the given number which are too big or too small that is written in the decimal form. That means, it always written in the power of 10 form.

For example : 8000 is written as, $8\times 10^3$

As we are given the digit which is, 1645.6

This number is written in scientific notation as :

$1.6456\times 10^{3}$

Therefore, the correct representation is, $1.6456\times 10^{3}$

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Air containing 20.0 mol% water vapor at an initial pressure of 1 atm absolute is cooled in a 1- liter sealed vessel from 200°C t

chubhunter [2.5K]

Answer:

This solution is quite lengthy

Total system = nRT

n was solved to be 0.02575

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At 15⁰c

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3 years ago

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3 years ago

Nitrogen and hydrogen combine to form ammonia in the Haber process. Calculate (in kJ) the standard enthalpy change ΔH° for the r

PolarNik [594]

Answer: -105 kJ

Explanation:-

The balanced chemical reaction is,

$N_2(g)+3H_2(g)\rightarrow 2NH_3(g)$

The expression for enthalpy change is,

$\Delta H=\sum [n\times B.E(reactant)]-\sum [n\times B.E(product)]$

$\Delta H=[(n_{N_2}\times B.E_{N_2})+(n_{H_2}\times B.E_{H_2}) ]-[(n_{NH_3}\times B.E_{NH_3})]$

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where,

n = number of moles

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3 years ago

At room temperature (208C) and pressure, the density of air is 1.189 g/L. An object will float in air if its density is less tha

Ugo [173]

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2 years ago

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svetlana [45]

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