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4 years ago

The picture represents sulfur trioxide.

Chemistry

1 answer:

777dan777 [17]4 years ago

7 0

Answer:

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Explanation:

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1. A student determines the density of water to be 0.966g/ml at a

lions [1.4K]

<u>Answer:</u>

<em>The percentage error in the measurement is 2.4% </em>

<u>Explanation:</u>

The measurement made by the student is $0.966 g/cm^3$ .

But the actual value of density is $0.943 g/cm^3$

The formula to calculate percentage error is

percentage error = $\frac{(measured \ value-actual \ value)}{(actual \ value)} \times 100$

Hence percentage error in this case is given by

<em>Percentage error = $\frac{(0.966-0.943)}{0.943} \times 100$ </em>

<em>= $\frac{0.023}{0.943} \times 100=2.4%$ </em>

A physical quantities value will be determines by various quantities. If errors are made in measuring any of these quantities there will be error in the measurement of the final physical quantity as well.

Here density of a substance is a derived quantity determined by measuring mass and volume of that substance.<em> If errors are made in mass and volume measurements the density value will also be erroneous. </em>

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3 years ago

Iron-59 has a half-life of 44 days. a radioactive sample has an activity of 0.64 mbq. what is the activity of the sample after 8

myrzilka [38]

Radioactive decay is a pseudo-first order reaction. When you know the half-life of the material, you could use this equation.

A= A₀(1/2)^t/h
where
A is the final activity
A₀ is the initial activity
t is the time
h is the half-life

A = (0.64)(1/2)^88/44 = <em>0.16 mbq</em>

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4 years ago

What are two observations that supported the theory of continental drift?

madam [21]

Answer: There are fossils found on either side of different continents and the continents look as though some are puzzle pieces that fit together.

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3 years ago

In a game of soccer, Jenny kicks the ball straight down the field. Her teammate Craig is waiting close by. He does not allow the

tigry1 [53]

Answer:

B. It moves more rapidly in the same direction.

Explanation:

6 0

3 years ago

What is Fracking (Own Words)

Sever21 [200]

<h3>Hey Mate Here Is Your Answer:- </h3>

The process of forcing liquid at high pressure into rocks, deep holes in the ground, etc. in order to force open existing cracks and take out oil or gas.

<h3>Hope This Helps You ❤️</h3>

5 0

3 years ago

Read 2 more answers