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3 years ago

I’m confused on all this and I need the answers...

Chemistry

1 answer:

Anarel [89]3 years ago

7 0

Answer:

Explanation:

Synthesis Reaction:

The reaction in which two or more molecules or compound combine together to form a new compound.

1. K + Cl₂ --------> KCl

Balanced equation

2 K + Cl₂ -------->2 KCl

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2. Ca + F₂ --------> CaF₂

Balanced equation

Ca + F₂ --------> CaF₂

--------------------------------------

3. Ag + S --------> AgS

Balanced equation

2Ag + S --------> Ag₂S

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4. Na + I₂ --------> NaI

Balanced equation

2 Na + I₂ --------> 2 NaI

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5. Mg + O₂ --------> MgO

Balanced equation

2 Mg + O₂ --------> 2 MgO

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6. H₂ + Cl₂ --------> HCl

Balanced equation

H₂ + Cl₂ --------> 2 HCl

____________________________

Decomposition reaction:

when one compound breaks down into 2 or more molecule or components.

7. Cs₂O --------> Cs + O₂

Balanced equation

2 Cs₂O --------> 4 Cs + O₂

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8. H₂O --------> H₂ + O₂

Balanced equation

2 H₂O --------> 2 H₂ + O₂

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9. MgBr₂ --------> Mg + Br₂

Balanced equation

MgBr₂ --------> Mg + Br₂

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10. AlCl₃ --------> Al + Cl₂

Balanced equation

2 AlCl₃ --------> 2 Al + 3 Cl₂

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11. KI --------> K + I₂

Balanced equation

2 KI --------> 2K + I₂

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12. NaCl --------> Na + Cl₂

Balanced equation

2 NaCl --------> 2 Na + Cl₂

_______________________________

Combustion:

when a fuel burn in the presence of oxygen and produces carbon dioxide and water.

13. C₃H₈ + O₂ --------> CO₂ + H₂O

Balanced equation

C₃H₈ + 5 O₂ --------> 3 CO₂ + 4 H₂O

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14. C₂H₄ + O₂ --------> CO₂ + H₂O

Balanced equation

C₂H₄ + 3 O₂ --------> 2 CO₂ + 2 H₂O

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_AlBr3+_K2SO4>_KBR+_Al2(SO4)3

Misha Larkins [42]

Answer:

Balancing chemical equation means making a number of atoms or molecules equal on both sides. In other words, this means that the number of atoms and molecules of each reacting element needs to be the same as the number of atoms and molecules of those elements in the product.

Our reaction is:

AlBr3 + K2SO4 -> KBr + Al2(SO4)3

and we need to balance it.

Since there are 3 molecules of SO4 in the product we need to put 3 before the reactant K2SO4. There are also 2 atoms of Al in the product, so we need to put 2 in front AlBr3. Now we have 6 atoms of K and Br on the left side, so we need to put 6 in front of KBr in the product.

So, our balanced equation will look like this:

2AlBr3 + 3K2SO4 -> 6KBr + Al2(SO4)3

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3 years ago

How did humans and animals adapt/survive to hurricane Katrina? AND Give examples of organisms that could not adapt/survive? PLS

guajiro [1.7K]

Some organisms that could not survive where cats, dogs, birds, horses, fish, cows, every animal that was in hurricane Katrina was affected by it. Some of these animals were able to survive and others were rescued from near death.
Most of the animals could not adapt to this change because they are not used to this type of change. The water was too strong for the fish and when the water brought the fish into any water/sea animal there was also medal because the water in through peoples houses (pretty much the man-made stuff that's not meant for sea is killing the animals in the water).
Any animal that was left behind was affected. The animals could not adapt to this change they have never experienced something that tragic before, how they survived? Well, the animals that survived was mainly because of there natural instinct, before an earthquake or anything hits there are many animals that can sense the storm coming before it even hits and in this situation, the animal could, wake up, run to owner, flee, run to higher ground, and if they cant sense it. They see whats going on around them and then they know something is wrong.

8 0

3 years ago

Read 2 more answers

The reaction of 5.40 g of carbon with excess O2 yields 13.6 g of CO2. What is the percent yield of this reaction?

vazorg [7]

C + O2= CO2
$n = \frac{m}{mw}$
$n = \frac{5.4}{12} \\ n = 0.45 \: mol \: of \: carbon$
$n = \frac{13.6}{12 + 16 \times 2} \\ n = \frac{13.6}{44} \\ n = 0.31 \: mol \: of \: carbon \: dioxide$
CO2 is limit
5.4-3.72= 1.68 g of C is excess
5.4 g = 100%
3.72 g = x
x=68.9 %

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3 years ago

Why is a changing ocean temperature of only one or 2 degrees so concerning? Please help!!!!

Svetllana [295]

Because it throws the earth off balance and if it does it often enough then it will soon add up.

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3 years ago

Read 2 more answers

4. A balloon is filled with 3.0 L of helium at 310 K. The balloon is placed in an oven where the

77julia77 [94]

Answer:

3,29L

Explanation:

3.29L = V2

Formula: V1/T1 = V2/T2

--------------------

Given:

V1 = 3.0 L V2 = ?

T1 = 310 K T2 = 340 K

--------------------

Plugin:

(X stands in place of V2 just to make it easier to look at)

[3.0L / 310K = X / 340K]

(3.0L / 310K = 0.01L/K)

0.01L/K = X / 340K

(multiply 340K on both sides, it cancels out on the right)

0.01L/K * 340K = X

(0.01L/K * 340K = 3.29L)

**3.29L = X**

[or]

**3.29L = V2**

4 0

2 years ago