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Marat540 [252]
2 years ago
10

Atoms are the smallest particles of a compound that still retain the properties of that

Chemistry
1 answer:
N76 [4]2 years ago
5 0

Answer:

the answer is true

Explanation:

it is the smallest particle in an element that takes part in a chemical reaction

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The questions are attached​
Sladkaya [172]

Answer:

Explanation:

a) Balanced chemical equation:

C₃H₈ + 5O₂      →        3CO₂ + 4H₂O

b) Mass of oxygen gas needed = ?

Mass of propane = 25 g

Solution:

Number of moles of propane = mass/molar mass

Number of moles = 25 g/  44.1 g/mol

Number of moles = 0.57 mol

now we will compare the moles of oxygen and propane:

                            C₃H₈        :          O₂        

                                1           :            5

                             0.57        :         5/1×0.57 =  2.85 mol

Mass of oxygen:

Mass = number of moles × molar mass

Mass = 2.85 mol × 32 g/mol

Mass = 91.2 g    

c) water vapors produced = ?

Mass of propane = 25 g

Solution:

Number of moles of propane = mass/molar mass

Number of moles = 25 g/  44.1 g/mol

Number of moles = 0.57 mol

now we will compare the moles of water and propane:

                            C₃H₈        :          H₂O        

                                1           :            4

                             0.57        :         4/1×0.57 =  2.28 mol

Mass of water vapors:

Mass = moles × molar mass

Mass = 2.28 mol × 18 g/mol

Mass = 41.0 g

d)

mass of water vapors produced = 1.5 kg (1500 g)

Mass of propane reacted = ?

Solution:

Number of moles of water vapors:

Number of moles = mass/molar mass

Number of moles = 1500 g/ 18 g/mol

Number of moles = 83.33 mol

now we will compare the moles of water and propane.

         

                            H₂O          :            C₃H₈    

                               4            :              1

                             83.3         :         1/4×83.3 =  20.8 mol

Mass of propane:

Mass = number of moles ×molar mass

Mass = 20.8 mol × 44.1 g/mol

Mass = 917 g

3 0
2 years ago
The melting points of canola oil, corn oil, sunflower oil, and peanut oil are 10°C, –11°C, –17°C, and –2°C. If you cool a mixtur
patriot [66]
You can separate out the canola oil easily, because it has cooled down enough to turn back into a solid.
8 0
2 years ago
What is the purpose of adding naoh to the solution of acetylsalicylic acid?
JulijaS [17]
<span>Answer: You shape the sodium salt of acetylsalicylic corrosive and make it considerably more water solvent. You could likewise make the compound more nucleophilic and respond the sodium salt with an alkyl halide to shape an ester.</span>
6 0
3 years ago
Given the reaction: Ca + 2H2O → Ca(OH)2 + H2 What is the total number of moles of Ca needed to react completely with 4.0 moles o
DiKsa [7]

<u>Answer:</u> The number of moles of calcium metal required is 2.0 moles.

<u>Explanation:</u>

We are given:

Moles of water reacted = 4.0 moles

The given chemical reaction follows:

Ca+2H_2O\rightarrow Ca(OH)_2+H_2

By Stoichiometry of the reaction:

2 moles of water is reacted with 1 mole of calcium metal

So, 4.0 moles of water will react with = \frac{1}{2}\times 4.0=2.0mol of calcium metal

Hence, the number of moles of calcium metal required is 2.0 moles.

6 0
3 years ago
Read 2 more answers
What part of a flowering plant becomes fruit?<br><br> seed<br> ovary<br> stem<br> spore
lord [1]

Answer:

the ovary

Explanation:

The fertilized ovule becomes the seed, and the ovary becomes the fruit. Petals are also important parts of the flower, because they help attract pollinators such as bees, butterflies and bats. You can also see tiny green leaf-like parts called sepals at the base of the flower.

4 0
3 years ago
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