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statuscvo [17]
3 years ago
13

Classify everyday materials contains chemicals, chemical reaction, or neither

Chemistry
1 answer:
schepotkina [342]3 years ago
4 0

Before we begin, let's first establish an understanding of basic terminology. It may be harder than you think to clearly define what is a chemical versus a chemical reaction. To help us better differentiate between closely related terms, review the words listed here.

 

Okay, so before we start, we must establish and clear understanding of the basic terminology. In order to help us differentiate among closely related terms, please kindly review the words listed below. There are 3 categories:

contains chemicals,

<span> chemical reaction,
<span>
or </span>neither  
 
Substances whose fundamental properties do not change, making it possible, for instance, to test for a specific chemical in a pool of water might be a useful information to remember regarding chemicals.  
 

Mass is one example of these unchanging properties. Therefore, if you can locate the mass of a specific substance’s concentration, then it can be concluded as chemical.</span>
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How many grams are in .11 moles of Cu
kodGreya [7K]

Answer:

m= 6.9905 = 7 g

Explanation:

The formula is m= M.n

m= mass (g), M= Molar mass (g/mole), n= moles (moles)

Molar mass of Cu is 63.55

=) m= 63.55*0.11

   m= 6.9905 = 7 g

5 0
3 years ago
What quantity of energy is released when 540 g of cyclopentane are burned amswer?
Zarrin [17]

Download the app called Socratic it helps with this

5 0
4 years ago
The standard molar enthalpy of vaporization for water is 40.79kJ/mol. What mass of steam is required to release 500 kJ of energy
bezimeni [28]

Answer:

220.9g of water are required

Explanation:

The molar enthalpy of vaporization is defined as the heat released when 1 mole of water changes from liquid to gas.

For water, 1 mole releases 40.79kJ. To release 500kJ are necessaries:

500kJ * (1mol / 40.79kJ) = 12.26 moles are necessaries

To convert moles to grams we must use the molar mass (H2O = 18.02g/mol):

12.26 moles * (18.02g / 1 mol) =

<h3>220.9g of water are required</h3>
4 0
3 years ago
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>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. 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>

  1. [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})
  2. [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
A student combined equal amounts of two solutions. One solution had a pH of 2 and the other had a pH of 12. Which would
Dahasolnce [82]
I think 6 is right.
5 0
2 years ago
Read 2 more answers
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