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Yuki888 [10]
4 years ago
12

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

as is ________.
Chemistry
1 answer:
Zepler [3.9K]4 years ago
8 0

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.

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2 years ago
What is the mass grams that are in 2.57 × 10²⁵ molecules of I₂
lina2011 [118]

The mass of I₂ that contains 2.57×10²⁵ molecules is 10843.52 g

From a detailed understanding of Avogadro's hypothesis, we understood 1 mole of any substance contains 6.02×10²³ molecules. This implies that 1 mole of I₂ also 6.02×10²³ molecules i.e

<h3>6.02×10²³ molecules = 1 mole of I₂</h3>

Recall:

1 mole of I₂ = 2 × 127 = 254 g

Thus,

<h3>6.02×10²³ molecules = 254 g of I₂</h3>

With the above information, we can obtain the mass of I₂ that contains 2.57×10²⁵ molecules. This is illustrated below:

6.02×10²³ molecules = 254 g of I₂

Therefore,

2.57×10²⁵ molecules = \frac{2.57*10^{25}  * 254}{6.02*10^{23}}\\\\

<h3>2.57×10²⁵ molecules = 10843.52 g of I₂</h3>

Thus, the mass of I₂ that contains 2.57×10²⁵ molecules is 10843.52 g

Learn more: brainly.com/question/24848191

5 0
2 years ago
Enter the net ionic equation, including phases, for the reaction of AgNO3 ( aq ) and KCl ( aq ) . Refer to the solubility rules
GrogVix [38]

Answer:

First, it is easiest if you write the compete molecular equation:

AgNO3(aq) + KCl(aq) ==> AgCl(s) + KNO3(aq) ..  molecular equation.

You must also know or look up which compounds are soluble (aq) and which are not (s). In this case, silver chloride (AgCl) is not soluble.  Thus, the net ionic equation is...

Ag+(aq) + Cl-(aq) ==> AgCl(s)

7 0
3 years ago
An analytical chemist weighs out of an unknown diprotic acid into a volumetric flask and dilutes to the mark with distilled wate
finlep [7]

Answer:

97.9 g/mol

Explanation:

<em>There is some info missing. I think this is the original question.</em>

<em>An analytical chemist weighs out 0.188 g of an unknown triprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. He then titrates this solution with 0.0600 M NaOH solutions. When the titration reaches the equivalence point, the chemist finds he has added 95.9 mL of NaOH solution. </em>

<em> Calculate the molar mass of the unknown acid.</em>

Let's consider the neutralization between a generic triprotic acid and NaOH.

H₃X + 3 NaOH → Na₃X + 3 H₂O

The moles of NaOH that reacted are:

0.0600 mol/L × 0.0959 L = 0.00575 mol

The molar ratio of NaOH to H₃X is 3:1. The moles of H₃X are 1/3 × 0.00575 mol = 0.00192 mol.

The molar mass of the acid is:

0.188 g / 0.00192 mol = 97.9 g/mol

3 0
4 years ago
3) Rubidium reacts with rubidium nitrate to produce rubidium oxide and nitrogen gas
postnew [5]

Answer:

3) Rubidium reacts with rubidium nitrate to produce rubidium oxide and nitrogen gas

a- Write the chemical reaction

10Rb + 2RbNO3 → 6Rb2O + N2

5 0
3 years ago
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