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3 years ago

Please help it’s due in 30 minutes

Chemistry

1 answer:

butalik [34]3 years ago

6 0

Answer:

52.2. The large chicken egg minus the human head is 52.2 g. The egg is not a good model because it does not resemble a human head. Also, the egg is made of parts such as food and things that are not similar to a human head. Furthermore, they are not the same shape.

Explanation:

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If 20.5 g of chlorine is reacted with 20.5 g of sodium, which reactant is in excess? 1. cl 2. neither is in excess. 3. na

zlopas [31]

2. neither is in excess is the answer.

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3 years ago

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How many moles would you need to have 7.85 x 10^22 molecules of ammonia (NH3).

RSB [31]

<h3>Answer:</h3>

0.130 moles NH₃

<h3>General Formulas and Concepts:</h3>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 7.85 × 10²² molecules NH₃

[Solve] moles NH₃

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

[DA] Set up: $\displaystyle 7.85 \cdot 10^{22} \ molecules \ NH_3(\frac{1 \ mol \ NH_3}{6.022 \cdot 10^{23} \ molecules \ NH_3})$
[DA] Multiply/Divide [Cancel out units]: $\displaystyle 0.130355 \ moles \ NH_3$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

0.130355 moles NH₃ ≈ 0.130 moles NH₃

3 0

3 years ago

Wat energy transformation occurs as the chicken cooks ?

ICE Princess25 [194]

Hello,

The answer should be "thermal energy".

Reason:

The answer is thermal energy because the heat from whatever source the person is energy is transferring heat to the chicken which is causing the chicken to cook therefore the answer is thermal (heat) energy.

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit

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4 years ago

for the reaction HCI+NaOH➡️NaCi+H2O, how many moles of hydrochloric acid are required to produce 150 g. of water?

Ne4ueva [31]

Answer: 8.33 mol of HCl (Hydrochloric Acid)

Explanation:

150 g H2O x __1 mol__ x __1 mol HCl__ = 8.33 mol of HCl

18.016 g 1 mol H2O

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3 years ago

What is the correct prefix for 6?<br><br> O A. Oct-<br> O B. Hepta-<br> O C. Nano-<br> O D. Hexa-

Alchen [17]

Answer:

Hexa

Explanation:

Enjoy !

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3 years ago

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