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zepelin [54]
3 years ago
11

An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate.

Chemistry
1 answer:
Gelneren [198K]3 years ago
3 0

Answer:

Explanation:

The value of n that satisfies the equation 7/n=8/7 is

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Iwhich
Irina18 [472]

Answer:

KCl is an Ionic compound

Explanation:

6 0
3 years ago
PLS I REALLY NEED HELP DUE FODAY
Gekata [30.6K]

<u>Answer:</u> The equilibrium constant for the reaction is 54.47

<u>Explanation:</u>

The equilibrium constant is defined as the ratio of the concentration of products to the concentration of reactants raised to the power of the stoichiometric coefficient of each. It is represented by the term K_{eq}

The given chemical equation follows:

H_2+I_2\rightleftharpoons 2HI

The expression for equilibrium constant will be:

K_{eq}=\frac{[HI]^2}{[H_2][I_2]}

We are given:

[HI]_{eq}=1.3544\times 10^{-2}M

[H_2]_{eq}=4.5647\times 10^{-3}M

[I_2]_{eq}=7.378\times 10^{-4}M

Putting values in above expression, we get:

K_{eq}=\frac{(1.3544\times 10^{-2})^2}{(4.5647\times 10^{-3})(7.378\times 10^{-4})}\\\\K_{eq}=54.47

Hence, the equilibrium constant for the reaction is 54.47

3 0
3 years ago
Which one of these is not involved in a Combustion reaction ?
vlada-n [284]

Answer:

you know how to do that she got to be in a room with you and she is a good person can you see it then she was a good girl and you guys doing it was awful no matter what she did you get your

7 0
2 years ago
What are types of elements from ionic attractions
sladkih [1.3K]
First, we have the ionic elements. This type of elements involved completely transferring of one ion to another in order to form a bond. There is also the type which forms the covalent bond which involves only sharing of the electrons. Those that exhibits the polar bonds and also the hydrogen bonding. 
5 0
3 years ago
A 40.15 gram sample of a hydrate of Na2SO4 was heated thoroughly in a porcelain crucible, until its weight remained constant. Af
mario62 [17]

Answer:

The formula of the hydrate of the sodium sulfate is :Na_2SO_4.7H_2O

Explanation:

Mass of hydrated sodium sulfate = 40.15 gram

Mass of completely dehydrated sodium sulfate = 21.27 gram

Mass of water molecules present in hydrated sodium sulfate =x

40.15 gram =  21.27 gram + x (Law of conservation of mass)

x  = 40.15 gram - 21.27 gram = 18.88 g

Moles of water = \frac{18.88 g}{18 g/mol}= 1.04mol

Moles of sodium sulfate =\frac{21.27 g}{142.04 g/mol}=0.1497 mol

Whole number ratio of sodium sulfate and water:

Sodium sulfate =\frac{0.1497 mol}{0.1497 mol}=1

Water =\frac{1.04 mol}{0.1497 mol}=6.9 a\\rox 7

The formula of hydrate be Na_2SO_4.7H_2O

So, the formula of the hydrate of the sodium sulfate is :Na_2SO_4.7H_2O

8 0
4 years ago
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