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3 years ago

What are the signs of a chemical reaction?

Chemistry

2 answers:

scoray [572]3 years ago

7 0

Answer:

Explanation:

Because i just had to do this on my assignment and got 100

blondinia [14]3 years ago

7 0

Answer:

hey , its option c because in chemical reaction colour + evolution of gas takes place + temp. + precipitation. but also light can come in the case of chemical reaction.

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Identify the substances that are likely to dissociate in water. Check all that apply

almond37 [142]

The hydroxide give it away

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3 years ago

5. Before vehicle emissions were well-regulated CO emissions were 66 g/mile. Assume this emission rate applies for an airshed. T

Aleks [24]

Answer:CALINE4 Model and Geographical Information System were used for

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4 years ago

Why would methane attain a tetrahedral structure?

lys-0071 [83]

<h2>HOPE THIS HELPS YOU ....</h2><h3>PLEASE MARK ME AS BRAINILIST...</h3>

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3 years ago

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The Ostwald process is used commercially to produce nitric acid, which is, in turn, used in many modern chemical processes. In t

Sloan [31]

Answer:

Mass = 42.8g

Explanation:

4 NH 3 ( g ) + 5 O 2 ( g ) ⟶ 4 NO ( g ) + 6 H 2 O ( g )

Observe that every 4 mole of ammonia requires 5 moles of oxygen to obtain 4 moles of Nitrogen oxide and 6 moles of water.

Step 1: Determine the balanced chemical equation for the chemical reaction.

The balanced chemical equation is already given.

Step 2: Convert all given information into moles (through the use of molar mass as a conversion factor).

Ammonia = 63.4g × 1mol / 17.031 g = 3.7226mol

Oxygen = 63.4g × 1mol / 32g = 1.9813mol

Step 3: Calculate the mole ratio from the given information. Compare the calculated ratio to the actual ratio.

If all of the 1.9831 moles of oxygen were to be used up, there would need to be 1.9831 × 4 / 5 or 1.5865 moles of Ammonia. We have 3.72226 moles of ammonia - Far excess. Because there is an excess of Ammonia, the Oxygen amount is used to calculate the amount of the products in the reaction.

Step 4: Use the amount of limiting reactant to calculate the amount of H2O produced.

5 moles of O2 = 6 moles of H2O

1.9831 moles = x

x = (1.9831 * 6 ) / 5

x = 2.37972 moles

Mass of H2O = Molar mass * Molar mass

Mass = 2.7972 * 18

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3 years ago

A commercial airplane typically flies at a height of 37,000 feet. If an average cell phone was dropped from an airplane, about h

saul85 [17]

Answer:

its b i just did it .

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3 years ago

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