3 years ago

Round off each measurement to the number of significant figures shown in parentheses.

Chemistry

1 answer:

Wewaii [24]3 years ago

6 0

We have to round off each measurement to the number of significant figures.

The correct answers are: 265.9, 0.00045 and 65 respectively.

265.991 when expressed in 4 significant figure it rounds off as 265.9 because 265.9 represents the value 265.991.

0.0004513 when expressed in 2 significant figure it rounds off as 0.00045 because zero before and after decimal are not significant.

6593 when expressed in 2 significant figure it rounds off as 65.

You might be interested in

An atom has the following electron configuration. 1s22s22p63s23p64s? How many valence electrons does this atom have? A: 2B: 3C:

Katena32 [7]

ANSWER

2 valence electrons

STEP-BY-STEP EXPLANATION:

The electronic configuration is given below as

$1s^22s^22p^62s^23p^64s^2$

Looking at the configuration, you will see that the last energy carries 2 electrons

Hence, the valence electrons are 2

3 0

1 year ago

An object has a mass of 72 kg. What is its weight?

In-s [12.5K]

Answer:Acceleration due to gravity on the moon is 1/6 times as that on the earth and we know that mass is property of the material it always remains same and weight is measure of gravitational force, hence

mass of object on moon is 60kg and weight =60g/6=10×10=100N

Explanation:

3 0

3 years ago

Which statement about fission is correct?

sashaice [31]

Answer chocies .......................

6 0

3 years ago

Read 2 more answers

Which intermolecular forces increase rapidly with increasing molecular size?

blondinia [14]

LONDON DISPERSION FORCES

8 0

3 years ago

What is meant by the negative sign in an answer like"-46.8kJ"? When would you use a positive sign

MA_775_DIABLO [31]

It’s positive when you use energy for work

3 0

3 years ago