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Neporo4naja [7]
4 years ago
9

Imagine you are a civil engineer who designs buildings. How might testing small-scale building models or their components be hel

pful in testing improvements and changes to the building design? Please explain your answer.
PLS HELP ME
Chemistry
2 answers:
DochEvi [55]4 years ago
7 0
The answer would be 40 cm
lubasha [3.4K]4 years ago
3 0
The error would be 40 cm
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5. How many elements do we have in Octane?
jekas [21]

Answer:

2 elements

Explanation:

Octane is composed of carbon and hydrogen atoms.

3 0
3 years ago
Which of the following is a type of physical change.
trapecia [35]

Answer:

B. a change in their state or substance

Explanation:

A change of state consists of a physical process in which the structure of the substance changes, its appearance. EXAMPLE: in the merger, the solid state becomes liquid, changes the rearrangement of particles from being highly compacted to being less compact.

6 0
4 years ago
1.50μm2. Convert this to square meters.
Verizon [17]
1.50x10^6 m2 is the answer you're looking for 
6 0
3 years ago
Consider the reaction: HCN (aq) + H2O (l) ⇄ CN- (aq) + H3O + (aq) Which of the following statements will decrease the amount of
alekssr [168]

Answer: Option (b) is the correct answer.

Explanation:

The given chemical reaction shows that hydrogen cyanide acid has been added to water which results in the formation of hydronium ion and cyanide ion.

Also, when we add a base like sodium hydroxide (NaOH) to HCN then it will help in accepting a proton (H^{+}) from hydrogen cyanide. As a result, formation of CN^{-} anion will be rapid and easy.

This will make the system not to do any extra work. So, amount of work done by system will decrease.

Thus, we can conclude that out of the given options, add solid NaOH to the reaction (assume no volume change) will decrease the amount of work the system could perform.

4 0
3 years ago
The most common form of elemental sulfur is S8, in which eight sulfur atoms linked in a ring of single bonds. At high temperatur
aliina [53]

Answer:

Explanation:

In S₈ , there are 8 single bonds which breaks up first . Energy absorbed

= 8 x 240 = 1920 kJ

In S₈ four double bonds of S₂ are formed . Let bond energy be x . In this process energy will be released . energy released in four S₂ molecules formed = 4 x

Given

1920 + 4x = 239

4x = 239 - 1920

x = - 420.25 kJ .

So bond energy of S₂ = 420.25 kJ .

8 0
3 years ago
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