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Ugo [173]
3 years ago
14

Will any girl be my girlfriénd?​type your instà id

Chemistry
2 answers:
I am Lyosha [343]3 years ago
7 0
There’s something to tell you
8_murik_8 [283]3 years ago
5 0
It’s about drive it’s about power
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Chemistry help please 20 points<br>ANSWER ALL THE QUESTIONS
faust18 [17]

Answer:

Explanation:

Remark

First of all you have to identify what is happening. You make the following observations.

The solution in the test tube in a cold water bath is colorless.

As you add heat, the color changes from colorless to brown.

What you are told

N2O4 is colorless

NO2 is brownish red.

What you conclude

The reaction is endothermic. That means it requires heat to happen. An endothermic reaction is

A + Heat ===> B

So you have three possible correct answers

N2O4 + 14 kCal ===> 2NO2

N2O4 ====> 2NO2                    dH = 14 kCal

N2O4 ====> 2NO2 - 14  kCal

I can't read the last 4 equations.

Other answers

As the temperature increased, the N2O4 became less.

As the temperature increased, the products were favored. (color change)

The reaction is exothermic (gives off heat) when the reaction goes from

NO2 - Heat ===> N2O2

5 0
4 years ago
PLS HELP - How many moles are present in 3.01 x 1023 atoms of N2 (nitrogen gas) ?
Neporo4naja [7]

Answer:

<h2>0.5 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{3.01 \times  {10}^{23} }{6.02 \times  {10}^{23} }  =  \frac{3.01}{6.02}  = 0.5 \\

We have the final answer as

<h3>0.5 moles </h3>

Hope this helps you

6 0
3 years ago
A airliner has an internal pressure of 1.00 ATM and temperatures of 25°C at take off if the temperature of the airlines routes t
Georgia [21]

Answer:

Explanation:

Using Gay lussac's law equation as follows;

P1/T1 = P2/T2

7 0
3 years ago
What is the temperature, in Kelvin, of a 213.3 L cylinder at 855 mm Hg that contains 6.3 moles of neon, Ne, gas?
KonstantinChe [14]
دعنا نذهب نعم نعم نعم هذا ليس ذلك طفلي
7 0
3 years ago
The following procedure was used to determine the volume of a flask. The flask was weighed dry and then filled with water. If th
navik [9.2K]

Answer:

31.345 cm³

Explanation:

Given:

Mass of the empty flask, m = 56.12 g

Mass of  the flask filled with water, M = 87.39 g

Density of the water, ρ = 0.9976 g/cm³

now,

the mass of water filled in the flask, Mw = M - m = 87.39 - 56.12 = 31.27 g

also,

Density = mass / volume

thus, for water

0.9976 = 31.27 / volume

or

volume of water = 31.345 cm³

hence, the volume of flask is the volume of water filled = 31.345 cm³

4 0
3 years ago
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