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Pie
3 years ago
6

Give the number of significant figures in this number: 40.00

Chemistry
2 answers:
erica [24]3 years ago
5 0

Answer:

4

Explanation:

because the follow digits are part of the answer even though they are following a decimal

Tatiana [17]3 years ago
4 0

A significant figure is every symbol that made the number itself.

In this case, the number 40.00 has four figures but only two of them are significant 40, this is because you haven't got any more decimals than the first zero.

If you have a case with zeros in front, you take to the first non zero digits.

For example, 0.071004 you wold express as 0.071 and those 7, and 1 are the significant ones.

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A mixture of 14.2 g of H2 and 36.7 g of Ar is placed in a 100.0 L container at
TiliK225 [7]

a) The total pressure of the system is  1.79 atm

b) The mole fraction and partial pressure of hydrogen is  0.89 and 1.59 atm respectively

c) The mole fraction and the partial pressure  of argon is 0.11 and 0.19 atm.

<h3>What is the total pressure?</h3>

We know tat we can be able to obtain the total pressure in the system by the use of the ideal gas equation. We would have from the equation;

PV = nRT

P = pressure

V = volume

n = Number of moles

R = gas constant

T = temperature

Number of moles of hydrogen = 14.2 g/2g = 7.1 moles

Number of moles of Argon = 36.7 g/40 g/mol

= 0.92 moles

Total number of moles =  7.1 moles + 0.92 moles = 8.02 moles

Then;

P = nRT/V

P = 8.02 * 0.082 * 273/100

P = 1.79 atm

Mole fraction of hydrogen = 7.1/8.02 = 0.89

Partial pressure of hydrogen =  0.89 * 1.79 atm

= 1.59 atm

Mole fraction of argon = 0.92 / 8.02

= 0.11

Partial pressure of argon = 0.11  *  1.79 atm

= 0.19 atm

Learn more about partial pressure:brainly.com/question/13199169

#SPJ1

3 0
1 year ago
How many Sodium (NA) Atoms are in Methylene?​
postnew [5]

Answer:

No Sodium(Na) in methylene

Explanation:

Methylene is an organic compound

4 0
3 years ago
How does the nucleus of a copper atom compared to the nucleus of a nickel atom
forsale [732]
Copper has 29 protons in the nucleus, while Nickel has 28 protons.
6 0
3 years ago
What is the OH- if the oh of a solution is 6.10
-Dominant- [34]

OH - REFERS TO THAT OT IS ION OF BASE IF THE SOLUTION OF BASE HAS PH 6.10 SO IT IS ACIDIC SO IT IS NOT POSSIBLE THAT SOLUTION OF OH- IS PH 6.10

5 0
2 years ago
PLEASE HELP
HACTEHA [7]
Not sure gets hotter prolly
5 0
2 years ago
Read 2 more answers
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