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3 years ago

HELP ME ASAP WITH THIS PLS!!! IM SO CONFUSED

Chemistry

2 answers:

White raven [17]3 years ago

6 0

The answer would be B. If it wasn’t a pure substance the liquid would separate into its components. Like if you put oil and water in a container and shake it up. After some time passes the oil will separate and “float” on top of the water

Ivenika [448]3 years ago

3 0

An Anne jajaja auaiajs jajaja Aisha a jajaja Janak

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The primary forces of attraction between water molecules in H2O(l) are

MakcuM [25]

The answer is Hydrogen bonds

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3 years ago

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Which sentence is a scientific statement? A. There is a substance around us that cannot be detected. B. Kids should go to school

stellarik [79]

Answer:

Experimentation is the best way to obtain knowledge.

Explanation:

This is a statement and it is scientific

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2 years ago

Culinary arts HELP FAST 1. Most people don't often think about science and restaurants or the food industry as

Andrews [41]

Answer:

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2 years ago

Use one of your experimentally determined values of k, the activation energy you determined, and the Arrhenius equation to calcu

stealth61 [152]

Answer:

Explanation:

Use one of your experimentally determined values of k, the activation energy you determined, and the Arrhenius equation to calculate the value of the rate constant at 25 °C. Alternatively, you can simply extrapolate the straight line plot of ln(k) vs. 1/T in your notebook to 1/298 , read off the value of ln(k), and determine the value of k. Please put your answer in scientific notation. slope=-12070, Ea=100kJ/mol, k= 0.000717(45C), 0.00284(55C), 0.00492(65C), 0.0165(75C), 0.0396(85C)

Explanation;

According to Arrhenius equation:

i.e. ln(k2/k1) = -Ea/R (1/T2 - 1/T1)

Where, k1 = 0.000717, T1 = 45 oC = (45+273) K = 318 K

T2 = 25 oC = (25 + 273) K = 298 K

i.e. ln(k2/0.000717) = -12070 (1/298 - 1/318)

i.e. ln(k2/0.000717) = -2.54738

i.e. k2/0.000717 = $e^{-2.54738}$

= 0.078286

Therefore, the required constant (k2) = 0.078286 * 0.000717 = $5.61*10^-^5$

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3 years ago

. The nucleophile in the reaction is _______ b. The Lewis acid catalyst in the reaction is ______ c. This reaction proceeds_____

strojnjashka [21]

Answer:

a. eletrophile

b. able to impose regioselectivity and stereo selectivity.

c. faster

Explanation:

Necleophile reaction is chemical reaction in which electron rich chemical specie replaces functional group with another electron deficient molecule. Lewis acid catalyst is organic chemical reaction which lewis acid act as electron pair acceptor. Nucleophile reaction proceeds about 25 times more faster than benzene.

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3 years ago