3 years ago

When balance the following chemical equations N2+O2= NO2 the coefficient for O2 is

Chemistry

1 answer:

Papessa [141]3 years ago

4 0

Answer:

Explanation:

N₂ + O₂ ---> NO₂

balance

N₂ + 2O₂ ---> 2NO₂

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How many cm in 725 km?

tigry1 [53]

1 km is equal to 100,000 cm
$725km \times 100000cm \\ = 72500000 \: km .cm$
and you need to divide it to 1 km so that you can get rid of the km.
$= 72500000cm$

5 0

3 years ago

Can someone show their work on how to do this: Calculate the number of moles of Al2O3 present in 23.87g. (Molar mass of Al2O3= 1

vodomira [7]

Answer:

0.234 moles

Explanation:

moles of Al2O3 = mass / molar mass

moles of Al2O3 = 23.87g / 102.0g/mol

moles of Al2O3 = 0.234 moles (to three significant figures)

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3 years ago

The Arrhenius theory explains how the concentration of H

koban [17]

Answer:true

Explanation:

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2 years ago

The complete combustion of ethanol, c2h5oh(l), to form h2o(g) and co2(g) at constant pressure releases 1235 kj of heat per mole

likoan [24]

Since it was specifically stated that heat is released, therefore heat is located on the right side of the reaction equation. Also stating the states of each compound, the complete balanced reaction would be:

C2H5OH (l) + 3 02 (g) -----> 2 CO2 (g) + 3 H2O (g) + 1235 kJ

6 0

3 years ago

Surrounding ions with water molecules is known as

Stells [14]

Answer:

Hydration

Explanation:

In water, ions are surrounded by a sphere of water molecules called a hydration shell. The process of forming this shell is called hydration.

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3 years ago