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Ymorist [56]
3 years ago
13

How do scientists determine the names for so many different living things

Chemistry
1 answer:
lara31 [8.8K]3 years ago
8 0

Answer:

Taxonomy

Explanation:

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When the products of a reaction are hotter than the reactants, an exothermic reaction is happening. An exothermic reaction is a reaction that releases energy to the surroundings. The energy released should be more than what is absorbed in order to maintain the reaction.
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Illusion [34]

Answer:

Mass of KCL = 218 grams.

Explanation:

Step 1: calculate the heat that must be absorbed(q).

Heat that must be absorbed(q) is calculated as follows:

q= m c (T2-T1).

q = 750g (4.18 J/gC)(20-4 C) = 5.016X10^4 J = 50.16 kJ

Step 2: we determine moles of KCL as follows:

Moles KCl = 50.16 kJ / 17.2 kJ/mol = 2.92 moles.

Step 3: calculate mass of KCL:

Mass of KCl = 2.92 mol X 74.55 g/mol = 218g.

Therefore, 218 grams of KCL would have to be dissolved into 750 g of 20.0°C H2O to produce the solution.

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3 years ago
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Answer ASAP 25 points
kykrilka [37]

<u>Answer:</u> The correct answer is NH_3 is the base and NH_4Cl is the salt.

<u>Explanation:</u>

Neutralization reaction is defined as the reaction in which an acid reacts with a base to produce salt and water as products.

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and a base is defined as a substance which accepts protons.

For the given chemical reaction:

NH_3+HCl\rightarrow NH_4Cl

Here, NH_3 is a base because it is accepting proton and HCl is an acid because it is loosing proton.

NH_4Cl is considered as a salt because it is formed by the combination of acid and base.

Hence, the correct answer is NH_3 is the base and NH_4Cl is the salt.

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Answer:

An action that must be brought in the venue that has jurisdiction over the situs or is otherwise designated by law.

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497.680 to the nearest gram (1 g)
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14109 is the nearest gram
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