a compound consists of 17.6% of hydrogen and 82.4% nitrogen. Determine the empirical formula of the compound
Answers
Answer: The empirical formula for the given compound is
Explanation:
We are given:
Percentage of H = 17.6 %
Percentage of N = 82.4 %
Let the mass of compound be 100 g. So, percentages given are taken as mass.
Mass of H = 17.6 g
Mass of N = 82.4 g
To formulate the empirical formula, we need to follow some steps:
Step 1: Converting the given masses into moles.
Moles of Hydrogen =
Moles of Nitrogen =
Step 2: Calculating the mole ratio of the given elements.
For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 5.88 moles.
For Hydrogen =
For Nitrogen =
Step 3: Taking the mole ratio as their subscripts.
The ratio of H : N = 3 : 1
Hence, the empirical formula for the given compound is
mass of N = 14g
mass of H = 1g
17,6% H = 17,6g H
82,4% N = 82,4g N
17,6g : 1g = 17,6 moles of H
82,4g : 14g = 5,89 moles of N
N : H = 5,89 : 17,6 ||:5,89
N : H = 1 : 2,99≈3
the empirical formula of the compound = NH₃ (ammonia)
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Answers
The freezing point of lead is 621.5 fahrenheit (327.5 celsius). The freezing point is the temperature at which a substance transitions from its liquid to its solid state, typically under normal atmospheric pressure.
The temperature at which a substance changes from its liquid phase to a solid phase, normally under normal atmospheric pressure, is referred to as the freezing point. It is a physical attribute of matter. This transition takes place when the attraction interactions between the substance's molecules outweigh their kinetic energy, leading the molecules to organise themselves in a predictable way and create a solid lattice. The nature of the substance, pressure, and contaminants in the substance are some of the elements that affect the freezing point. Different intermolecular forces of varying types and strengths give different substances different freezing points. Thefreezing pointof lead is 621.5 fahrenheit (327.5 celsius).
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A. ClAl3.
B. Cl3Al.
C. AlCl3.
D. Al3Cl.
Answers
AICI3
which is choice c.
Aluminium chloride
Chemical compound
DescriptionAluminium chloride is the main compound of aluminium and chlorine. It is white, but samples are often contaminated with iron(III) chloride, giving it a yellow color. The solid has a low melting and boiling point. Wikipedia
IUPAC ID: aluminium chloride
Molar mass: 133.34 g/mol
Soluble in: Water
Related Lewis acids: Iron(III) chloride; Boron trifluoride
Heat capacity (C): 91.1 J/mol·K
Other names: aluminium(III) chloride; aluminum trichloride
Answers
ions are of two types
1. cations ( positive ion )
2. anion (negative ion )
for e.g Al³+
In ion is an atom who lose or gain electrons. When it lose an electron, the number of protons will be higher than then number of electrons in an normal atom, and will be called positive ion or cation.
Example: The Aluminium lose 3 electrons. So the ion of Al will be
Ionization equation:
And When an ion gain electrons, the number of electrons will be higher than the number of protons in an normal atom, and will be called negative ion, or Anion..
Example: the Chloride gain 1 electron. So the ion of Cl is
Ionization equation:
HOPE THIS HELPS :D
precipitation
perception
Answers
Watering isn't the right term.
Perception is seeing something.
Answer:
Precipitation
Explanation:
Answers
Oxidation reaction is a type of reaction wherein there is a loss of electrons. An oxidation reaction may also be a reducing agent. Example is the reaction Zn + 2H+ = Zn2+ + H2. When you separate them by their half cell reaction, you have 2H+ 1e- = H2. H here is the reducing agent and has lost 1 electron in the process.
Student Name
Instructor
Date
Lab Objectives
In this lab you will:
• help the aliens, called Tinyians, build the best house on their planet called Tiny World.
• experiment with different building materials to collect data to see which ones best meet the criteria for building a home on Tiny World.
• test each building material for density, thermal and electrical conductivity, flexibility, and magnetism.
Background Research:
You will need to gather background research from the virtual lab to form a good hypothesis. Read the Welcome to Tiny World part of the lab. Use the background information you learn to answer the questions below.
Describe the gravity of Tiny World.
Part 1:
Describe the reason your house will need magnets.
Describe the climate of Tiny World.
Hypothesis:
In this section, include the IF/THEN statements you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.
A If we use _______ to build the roof of the house, then the temperature inside the house will remain cooler.
B If we use_______ to build the walls and floors of the house, then the temperature inside the house will remain cooler.
C If we use ______ to bring electricity into the home, then it will allow electricity to flow into the home at a faster rate.
D If we use_______ to construct the latches on the windows and doors, then the magnetism will keep the latches secure.
Part 2
Procedure:
1. You will test each building material for density, thermal and electrical conductivity, flexibility, and magnetism.
2. Record your observations in the data table provided below.
3. Repeat steps with all test materials.
Data:
Record the results of each of your physical property tests in the table below.
Wood Clay Brick Iron Aluminum Copper Nickel
Flexibility
(?/10)
Magnetism
(number of paper clips)
Thermal Conductivity
(W/(m·K))
Electrical Conductivity
(x107 S/m)
Mass (g) 10g 10g 10g 10g 10g 10g
Volume (cm3)
Formula:
L x W x H
Density
(g/cm3)
Formula:
D=M/V
part 3
Conclusion
Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.
1 Using two to three sentences, summarize what you investigated and observed in this lab.
2 What was the independent variable in the lab?
3 What was the dependent variable in the lab?
4 Did each of your experiment results support, or fail to support your four hypotheses? A.
B
C.
D.
5 Why do you think a building material's density is important when building homes or architectural structures?
6 Why wouldn’t you choose wood or aluminum for the latches on your house?
7 Which material has the highest thermal conductivity?
8 Which material has the highest electrical conductivity
9 Based on your data, explain why these materials have the highest thermal and electrical conductivity?
10 Think about where you live now or where you have lived in the past; use complete sentences to describe this environment and the weather.
Answers
Answer:
The purpose of the "Measuring Physical Properties Lab Report" is to test the physical properties of different building materials in order to choose the most suitable materials for a new home in Tiny World. The lab objectives include helping the Tinyians build their best house, experimenting with different materials to collect data, and testing each material for density, thermal and electrical conductivity, flexibility, and magnetism.
The background research will provide information about Tiny World, including its gravity, climate, and other relevant details. The hypothesis section requires you to make IF/THEN statements based on the lab activity. For example, IF we use a certain material for the roof, THEN the temperature inside the house will remain cooler.
In part 2, the procedure involves testing each building material for density, thermal and electrical conductivity, flexibility, and magnetism. You need to record your observations in the data table provided.
In part 3, the conclusion should summarize the lab results and provide an interpretation of the results. It also includes answering questions about the independent and dependent variables in the lab, whether the experiment results support or fail to support the hypotheses, and explanations about the importance of density in building materials, why wood or aluminum wouldn't be suitable for latches, and which materials have the highest thermal and electrical conductivity.
Finally, you are asked to describe the environment and weather of a place you have lived in the past or currently live in, using complete sentences.
Hope this helps :)
Explanation:
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