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Assoli18 [71]
3 years ago
11

Please help, How would you define what a chemical reaction and an equation is? Give an example.How would you know if a chemical

reaction is balanced? Give an example.
Chemistry
1 answer:
ipn [44]3 years ago
8 0

Answer:

A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side.

Explanation:

In this chemical reaction, nitrogen (N2) reacts with hydrogen (H) to produce ammonia (NH3). The reactants are nitrogen and hydrogen, and the product is ammonia.

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A student says that all pure substances are elements. Do you agree? Why or why not? Question 14 options:I disagree.  Elements fo
LenaWriter [7]

Answer: I disagree.  Elements form all pure substances, but some pure substances include elements bonded together to form molecules and compounds.


Explanation:


Pure substances are those that have a uniform and constant (invariable) composition.


That condition is met by both elements and compounds.


Elements are pure substances of one only kind of atoms. For example, gold, oxygen, sodium, hydrogen, are pure substances that arer elements. There are 118 elements known and they are all listed in the periodic table.


Compounds are pure substances formed by two or more different kind of atoms. Water (H₂O), table salt (NaCl), and ethanol (CH₃-CH₂OH), are examples of pure substances that are compounds. There are pratically infinite different compounds.


In conclusion, compounds are also pure substances, since every sample of a given compound has always the same kind of elements bonded in the same way.


4 0
3 years ago
Read 2 more answers
What are the genotypes and phenotypes of the offspring in this image?
soldier1979 [14.2K]

Answer:

Genotypes: Hh, Hh, hh, and hh

Phenotypes: Short Hair, Short Hair, Long Hair, Long Hair

Have a nice day! ^-^

6 0
3 years ago
Read 2 more answers
Who's good at chemistry?<br> I'd really appreciate it
NARA [144]
P(total)=P1+P2+P3+...
P(total)=P(N2)+P(others)+P(O2)

100kPa=78kPa+1kPa+P(O2)

P(O2)=100-79=21kPa
6 0
3 years ago
A mixture of CO (g) and excess O2(g) is placed in a 1.0 L reaction vessel at 100.0C and a total pressure of 1.50 atm. The CO is
umka2103 [35]

Answer:

Partial pressure of of CO₂ in the product mixture is 0,20atm

Explanation:

The balance equation is:

2CO(g) + O₂(g) → 2CO₂(g)

Total pressure of CO(g) and O₂(g) gases before reaction at 100,0°C and 1,0L is 1,50 atm. You can say:

X₁ + Y₁  = 1,50atm <em>(1)</em>

Where X₁ is initial partial pressure CO and Y₁ is initial partial pressure of O₂

After reaction partial pressures are:

X₂ = X₁ - 2n = 0; <em>2n = X₁</em>

Y₂ = Y₁ - n

Z₂ = 2n

Where Z₂ is final partial pressure of CO₂

After reaction pressure at 100,0°C and 1,0L is 1,40 atm, that means:

1,40 atm = (Y₂ + Z₂)

1,40 atm = Y₁ - n + 2n

1,40atm = Y₁ + n

1,40 atm = Y₁ + X₁/2 <em>(2)</em>

Replacing (1) in (2)

1,40 atm = 1,50atm - X₁ + X₁/2

-0,10 atm = - X₁/2

<em>0,20 atm = X₁</em>.

As 2n = X₁; 2n =<em> Z₂ = 0,20 atm</em>

I hope it helps!

7 0
3 years ago
What are the names given to each part of the picture indicated above​
rusak2 [61]
Cant really see the picture
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3 years ago
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