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Firlakuza [10]
3 years ago
5

What is the value of work done on an object when a 70–newton force moves it 9.0 meters in the same direction as the force? A. 7.

8 joules B. 6.3 × 102 joules C. -7.8 joules D. 0 joules
Chemistry
2 answers:
ICE Princess25 [194]3 years ago
7 0

Answer:

B. 6.3 × 10² J

Explanation:

The formula for work (w) done is

w = f×d

f = 70 N

d = 10 m

w = 70 × 10

w = 700 J = 7 × 10² J

w is <em>positive</em> because work is being done on the object.

aksik [14]3 years ago
6 0

Answer:

B. 6.3 x 10² Joules

Explanation:

Work is the product of force and distance.  

w = F x d  

where w is the work, F is the force and d is the distance.  

Given,  

F = 70 N, N or Newton is the SI unit of force

d = 9.0 m, m is the SI unit of distance

Plugging the number in the work equation we have,  

w = 70 N x 9.0 m = 630 J , Joules is the SI unit of work

Expressing 630 J in scientific notation we get, 6.3 x 10² J

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An unknown compound displays singlets at δ 2.1 ppm and 2.56 ppm in the ratio of 3:2. what is the structure of the compound?
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2) So, one alkyl group is CH3 and second one can be CH or CH2.

 

3) If we know that ratio between two types of hydrogens is 3:2, it can be concluded that second alkyl group is CH2. 


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7 0
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A 1.67-g sample of solid silver reacted in excess chlorine gas to give a2.21-g sample of pure solid Agcl.The heat given off in t
kotegsom [21]

<u>Given:</u>

Mass of Ag = 1.67 g

Mass of Cl = 2.21 g

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<u>To determine:</u>

The enthalpy of formation of AgCl(s)

<u>Explanation:</u>

The reaction is:

2Ag(s) + Cl2(g) → 2AgCl(s)

Calculate the moles of Ag and Cl from the given masses

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