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Schach [20]
4 years ago
11

BRAINLIESTTTT ASAP!!! PLEASE HELP ME :) How do I add using significant rules? Explain.

Chemistry
1 answer:
igor_vitrenko [27]4 years ago
7 0

Answer:

I Can explain in the simplified explaination

Explanation:

When adding and subtracting numbers, the rules of significant figures require that the number of places after. the decimal point in the answer is less than or equal to the number of decimal places in every term in the. sum. (Treat subtraction as adding the same number with a negative sign in front of it.)

This are the Rules

Non-zero digits are always significant.

Any zeros between two significant digits are significant.

A final zero or trailing zeros in the decimal portion ONLY are significant.

For numbers with decimal points, zeros to the right of a non zero digit are significant. Thus 6.00 has three significant figures and 0.050 has two significant figures. For this reason it is important to keep the trailing zeros to indicate the actual number of significant figures.

Thank you for asking this Question im strong in math!

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A 1.44-g sample of an unknown pure gas occupies a volume of 0.335 L at a pressure of and a temperature of 100.0°C. The unknown g
Zepler [3.9K]

Answer:

Xenon

Explanation:

Step 1: Given data

  • Mass (m): 1.44 g
  • Volume (V): 0.335 L
  • Pressure (P): 1.00 atm (I looked it up)
  • Temperature (T): 100.0°C

Step 2: Convert the temperature to Kelvin

K = °C + 273.15 = 100.0°C + 273.15 = 373.2 K

Step 3: Calculate the number of moles (n)

We will use the ideal gas equation.

P × V = n × R × T

n = P × V / R × T

n = 1.00 atm × 0.335 L / (0.0821 atm.L/mol.K) × 373.2 K

n = 0.0109 mol

Step 4: Calculate the molar mass of the gas

M = 1.44 g / 0.0109 mol = 132 g/mol

Step 5: Identify the gas

The gas with a molar mass of about 132 g/mol is xenon.

8 0
4 years ago
Question 3
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Answer:

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Explanation:

D

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5 0
3 years ago
What’s the balance of this
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Explanation:

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