How could you use iron oxide to prepare iron nitrate?
Answers
Iron oxide can be reacted with nitric acid to prepare iron nitrate. This reaction involves the displacement of hydrogen ions in nitric acid by iron ions in iron oxide, leading to the formation of iron nitrate and water.
To use iron oxide to prepare iron nitrate, you can follow these steps:
1. Begin with iron oxide (Fe₂O₃), which is a compound consisting of iron and oxygen.
2. Dissolve the iron oxide in a strong acid, such as concentrated nitric acid (HNO₃). This reaction will produce iron nitrate (Fe(NO₃)₃) and water as byproducts. The chemical equation for this reaction is:
2Fe₂O₃ + 6HNO₃ → 4Fe(NO₃)₃ + 3H₂O
3. After the reaction is complete, you can separate the iron nitrate from the remaining mixture by filtration or evaporation. The iron nitrate can then be collected in a crystalline form for further use.
By following these steps, you can successfully use iron oxide to prepare iron nitrate.
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Related Questions
Question 5 (8 marks) Differentiate the following set of terms in relation to evaluation of the measurement tools. Provide relevant examples. ANSWER: Validity, Reliability, and Practicality
Answers
In the evaluation of the measurement tools, the following terms must be differentiated: validity, reliability, and practicality.
Validity refers to how accurately a tool measures what it is supposed to measure. A measurement tool is considered to be valid if it measures what it is supposed to measure. Validity can be classified into three types: content, criterion, and construct. Content validity refers to whether the measurement tool captures all aspects of the phenomenon being measured. Criterion validity refers to whether the measurement tool correlates with a known standard of measurement. Construct validity refers to whether the measurement tool measures the theoretical concept it claims to measure. Reliability refers to the consistency of a measurement tool's results. A measurement tool is reliable if it consistently measures what it is supposed to measure. Reliability can be classified into three types: test-retest, inter-rater, and internal consistency.
Test-retest reliability refers to whether the measurement tool produces consistent results when given to the same individuals at different times. Inter-rater reliability refers to whether the measurement tool produces consistent results when given to different raters. Internal consistency refers to whether the measurement tool produces consistent results across different parts of the same test. Practicality refers to how easy a measurement tool is to administer and score. A measurement tool is considered practical if it is easy to administer and score. For example, a 100-item questionnaire may be impractical to use in a clinical setting where time is limited. In conclusion, validity, reliability, and practicality are important factors to consider when evaluating measurement tools.
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a gas sample with a mass of 2.50 g is collected at 20.0oc and 732.5 mmhg. the volume is 1.28 l. what is the molar mass of the gas?
Answers
We can use the ideal gas law, PV = nRT, to solve for the number of moles of gas present:
P = 732.5 mmHg = 0.963 atm (converting to atm)
V = 1.28 L
T = 293.15 K (20.0°C = 293.15 K)
R = 0.08206 L·atm/(mol·K)
PV = nRT
n = PV/RT = (0.963 atm)(1.28 L)/(0.08206 L·atm/mol·K)(293.15 K) = 0.0557 mol
Next, we can use the formula for molar mass, M = m/n, where m is the mass of the gas, to solve for the molar mass of the gas:
M = m/n = 2.50 g/0.0557 mol = 44.9 g/mol
Therefore, the molar mass of the gas is 44.9 g/mol.
The molar mass of the gas is 34.75 g mol^-1. To find the molar mass of the gas, the formula for the ideal gas law can be used.
The ideal gas law is given as
PV = nRT
Where,
P = pressure of the gas
V = volume of the gas
n = number of moles of the gas
R = gas constant
T = temperature of the gas
The given values of pressure, volume, and temperature are
P = 732.5 mmHg
V = 1.28 L
R = 62.36 L mmHg mol^-1
KT = 20°C = 20 + 273.15 = 293.15 K
Substituting these values in the ideal gas law equation and solving for n will give us the number of moles of the gas in the sample.
n = (PV) / (RT)
n = (732.5 mmHg × 1.28 L) / (62.36 L mmHg mol^-1 K × 293.15 K)
n = 0.07195 mol
To find the molar mass of the gas, we can use the formula
m = (mass of gas) / (number of moles of gas)
m = 2.50 g / 0.07195 mol
m = 34.75 g mol^-1.
Therefore, the molar mass of the gas is 34.75 g mol^-1.
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suppose you have 250.0 ml of a 0.550 m sodium hydroxide solution. how many moles of sodium hydroxide are in the solution?
Answers
To find out how many moles of sodium hydroxide are in 250.0 ml of a 0.550 M NaOH solution, we can use the formula: Molarity (M) = moles of solute / liters of solution. First, we need to convert the volume from milliliters (mL) to liters (L).
There are 1000 mL in 1 L, so:250.0 mL = 0.2500 L, Now we can plug in the given values: Molarity (M) = 0.550 moles/L (given)Volume (L) = 0.2500 L (calculated). So,0.550 M = x moles / 0.2500 L. To solve for x (the number of moles of NaOH), we can rearrange the formula: moles of solute = Molarity x Volume. So, moles of NaOH = (0.550 mol/L) x (0.2500 L) moles of NaOH = 0.1375 moles. Therefore, there are 0.1375 moles of sodium hydroxide in 250.0 ml of a 0.550 m sodium hydroxide solution.
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I'll give brainliest
Answers
Answer:
Number one is f 2 is c number 3 is c
Explanation:
Those are the answers
Answer:xmnjjnnnnnnnnnnnnnnnnnnnnnnxxxxxxxxxxxxxxxxxxxxxhn cfghjnbvghjmnbvghmkjhbnmjhb mjhgvbnmkjyokonownndjnxjnjdndlnjbkxnlknsjcnldx bExplanation:
Select True or False.
The Sun is like the stars we see at night.
False
True
Answers
Answer:
yes
Explanation:
Sun is a star not a planet.
Yes true I guess but its just a lot closer
Electrons are transferred from atoms of to atoms of . This transfer makes the sodium atoms and the phosphorus atoms . As a result, the sodium and phosphorus atoms strongly each other.
Answers
Answer:
Explanation:
Electrons are transferred from atoms of sodium to atoms of phosophorus. This transfer makes the sodium atoms positive and the phosphorus atoms negative. As a result, the sodium and phosphorus atoms strongly attract each other.
Answer:
the image is posted below :)
Explanation:
I hope this helps :))
Geologic maps are most recognized by their _____, which represent different _____.
size, rock units
colors, rock units
contour lines, elevations
symbols, rock ages
Answers
Geologic maps are most recognized by their contour lines, which represent different elevations. Option C
This is further explained below.
What are Geologic maps?Generally, A geologic map, also known as a geological map, is a specialized map that is drawn out for the purpose of illustrating different geological phenomena.
The various rock units and geologic layers may be represented by different colors or symbols.
contour line: A curve along which a function has a constant value represents a contour line for a function with two variables.
This means that the curve unites points that have the same value at each point along the curve. It is a segment of the plane that is parallel to the plane that is taken from the three-dimensional graph of the function f.
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A Blood Test Indicates The Presence Of A Particular Disease 93% Of The Time When The Disease Is Actually Present. The Same Test Indicates The Presence Of The Disease Given That The Test Indicates The Presence Of The Disease. Give Your Answer In Decimal Form, Rounding To Four Decimal Places.
Answers
Given that a blood test indicates the presence of a particular disease 93% of the time when the disease is actually present, and we want to find the probability of the presence of the disease when the test indicates the presence of the disease.We can solve the problem by using Bayes' theorem. The probability of the disease being present when the test indicates the presence of the disease would be 0.1167 (rounded to four decimal places).
Bayes' theorem states that:
P(A|B) = P(B|A) × P(A) / P(B)
Where;P(A|B) is the probability of A occurring given that B has occurred.
P(B|A) is the probability of B occurring given that A has occurred.
P(A) is the probability of A occurring.
P(B) is the probability of B occurring
.Using the above notation, let;
A = Presence of the disease.
B = The blood test indicates the presence of the disease.
P(A|B) = The probability of the disease being present when the test indicates the presence of the disease.
P(B|A) = The probability of the blood test indicating the presence of the disease when the disease is present.
P(A) = The probability of the disease being present.
P(B) = The probability of the blood test indicating the presence of the disease.
When the test indicates the presence of the disease, the possible outcomes are:
Presence of the disease when the test indicates the presence of the disease.Presence of the disease when the test indicates the absence of the disease.No presence of the disease when the test indicates the presence of the disease.No presence of the disease when the test indicates the absence of the disease.The probability of the blood test indicating the presence of the disease when the disease is present is 93% or 0.93.P(B|A) = 0.93
The probability of the disease being present is not given in the problem statement, but we can assume it to be a small probability. Hence, we will assume P(A) to be 0.01 or 1%.P(A) = 0.01
To find the probability of the blood test indicating the presence of the disease, we can use the law of total probability. The possible outcomes when the test indicates the presence of the disease are presence and absence of the disease, i.e.,P(B) = P(B|A) × P(A) + P(B|not A) × P(not A)P(not A) = 1 - P(A) = 1 - 0.01 = 0.99P(B) = 0.93 × 0.01 + P(B|not A) × 0.99
We know that the blood test indicates the presence of a particular disease 93% of the time when the disease is actually present. Hence, we can assume that the blood test indicates the presence of the disease 7% of the time when the disease is not present.
P(B|not A) = 0.07P(B) = 0.93 × 0.01 + 0.07 × 0.99 = 0.0796
Using Bayes' theorem:
P(A|B) = P(B|A) × P(A) / P(B)P(A|B) = 0.93 × 0.01 / 0.0796 = 0.1166 ≈ 0.1167
Hence, the probability of the disease being present when the test indicates the presence of the disease is 0.1167 (rounded to four decimal places).
Answer: 0.1167
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C4H10(1) + O2(g)→ CO2(g) + H2O(l)
How many moles of O₂ are needed to fully combust 6.77 moles of C4H10?
Answers
What happened to the sediment?
Answers
so.. the answer is “ Sediment moves from one place to another through the process of erosion. “
hope this helps!!
What do an engine using gasoline to power a car and
mixing glue and laundry powder to create putty have in commen
Answers
An engine using gasoline to power a car and mixing glue and laundry powder to create putty are both examples of chemical reactions.
Gasoline is considered an energy source due to its ability to release stored chemical energy in the form of heat and mechanical work when it is burned in an engine. When gasoline is ignited in an engine, the chemical energy stored in its molecular bonds is released, causing a rapid combustion reaction that generates heat and expanding gases that push the pistons and create mechanical work.
The energy content of gasoline is typically measured in units of joules or British thermal units (BTUs), which are used to quantify the amount of energy released during combustion. Gasoline is a widely used and important energy source, but its combustion also produces harmful emissions that contribute to air pollution and climate change.
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What is the density of a substance with mass of 418.23g and a volume of 436.2ml
Answers
Answer:
0.96 g/mLExplanation:
The density of a substance can be found by using the formula
\(density = \frac{mass}{volume}\\\)
From the question we have
mass = 418.23 g
volume = 436.2 ml
\(density = \frac{418.23}{436 .2} \\ = 0.958803\)
We have the final answer as
0.96 g/mLHope this helps you
Through meiosis and sexual reproduction, children that are produced from parents are almost
guaranteed to be unique. Explain how events in meiosis and reproducing through sexual reproduction dramatically increase the genetic variability of a person.
Answers
Answer:
Mitosis: Cell division in Asexual Reproduction. 2 Daughter cells exactly like the parent. Heredity is passed to offspring: 100% DNA from 1 parent. Meiosis: Cell division in Sex Cells during Sexual Reproduction.
Explanation:
Whose personal story did you read (if you read several, pick your favorite)? What was the most interesting or eye-opening part of that person's story?
Answers
what is the boiling point of an aqueous solution of 15.5g of glucose dissolved in 150g of water?
Answers
Answer:
Freezing point of the solution is -1.07°C
Explanation:
What is the wavelength (in nm) of a radiation electromagnetic whose frequency is 7.45 x 1014/s? (Hint: c = 3.00 x 108 m/s and h = 6.63 x 10-34 J.s):
a. None is correct
b. 4.03 x 10-7
c. 402
d. 2.24x1014
e. 1.34 x 10-6
Answers
The wavelength of a electromagnetic radiation with the frequency of 7.45 x 1014/s is 402 nm.
The wavelength (λ) of a radiation electromagnetic can be calculated using the formula λ = c/f, where c is the speed of light and f is the frequency. From the given information, we have the frequency as 7.45 x 10^14/s and the speed of light as 3.00 x 10^8 m/s. However, we need to convert the frequency to Hz to match the units of the speed of light. Thus, we have:
f = 7.45 x 10^14/s = 7.45 x 10^14 Hz
Substituting the values in the formula, we get:
λ = c/f = 3.00 x 10^8 m/s / 7.45 x 10^14 Hz
Simplifying the expression, we get:
λ = 4.03 x 10^-7 m
However, the answer choices are given in nanometers (nm), so we need to convert meters to nanometers. Since 1 m = 1 x 10^9 nm, we have:
λ = 4.03 x 10^-7 m = 4.03 x 10^-7 x 10^9 nm/m = 402 nm
Therefore, the correct answer is (c) 402 nm.
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Describe the scale used to measure the basicity of a substance. Demonstrate how you could differentiate a weak base from a strong one. (10
points)
Answers
Answer:
The pH scale is used to measure the acidity or basicity of a substance.
Explanation:
pH stands for potential hydrogen. It ranges from 0 to 14, 7 being neutral. The pH of water is 7 i.e. it is neither acidic nor basic. 0 to 7 shows acidic behavior while 7 to 14 shows basic behavior.
Experiment:
Dip the pH paper in the liquid and wait for ten seconds. The pH strip starts to discolor.
For a strong acid the strip will turn red.
For a weak acid the strip will become pale red.
To find the correct pH value we can compare it with the indicator scale present on the pH scale box.
The scale used to measure the basicity of a substance is called the pH scale.
What is the pH scale?The pH scale is a logarithmic scale that ranges from 0 to 14 and is used to determine the acidity or basicity of a solution. A pH value of 7 is considered neutral, values below 7 are acidic, and values above 7 are basic.
To differentiate a weak base from a strong one, you can perform the following experiments:
pH Measurement: Measure the pH of the solution containing the base using a pH meter or pH indicator paper. A strong base will have a higher pH value, typically around 12-14, indicating a highly basic solution. A weak base will have a lower pH value, closer to 7, indicating a less basic or slightly basic solution.
Conductivity Test: Dissolve a small amount of the base in water and measure its electrical conductivity using a conductivity meter. Strong bases are good electrolytes and will conduct electricity well, resulting in a high conductivity. Weak bases, on the other hand, are poor electrolytes and will exhibit lower conductivity.
Reaction with Acids: Add a few drops of a strong acid, such as hydrochloric acid (HCl), to a solution containing the base. Strong bases will rapidly and completely neutralize the acid, resulting in a significant increase in pH. Weak bases, however, will only partially neutralize the acid, leading to a smaller increase in pH.
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What is the molarity of a solution composed of 6.25 g of HCl in 0.300 L ofsolution?
Answers
The concentration is measured by molarity, the formula of molarity is:
\(\text{Molarity (M)=}\frac{mole\text{s of solute}}{liters\text{ of solution}}=\frac{mol}{L}.\)Based on the given data, we've already had the volume in liters and we have to convert 6.25 grams of HCl to moles. We have to use the molar mass of HCl which is 36.4 g/mol (you can find the molar mass using the periodic table). The conversion would be:
\(6.25\text{ g HCl}\cdot\frac{1\text{ mol HCl}}{36.4\text{ g HCl}}=0.172\text{ moles HCl.}\)And the final step is to replace the values we have in the formula of molarity:
\(\text{Molarity}=\frac{0.172\text{ moles}}{0.300\text{ L}}=\text{0}.573\text{ M.}\)The molarity of 6.25 g of HCl in 0.300 L of solution is 0.573 M.
is acid rain corroding a statue an example of physical weathering
Answers
Answer:
Acid rain's effect on stone is a chemical change.
Explanation:
Acid rain has hydrochloric acid which reacts with the calcium carbonate in the stone.
I hope this helps. (Sorry if i am wrong)
HELP ASAP PLEASE 2H2+ O2 =2H2O, how many moles of water is produced if there is 10gm of O2 gas used?
Answers
Answer:
6.25 x 10^-4 moles H2O
Explanation:
moles H2O = 10 x 10^-3 g O2 x (1 mol O2/MM O2) x (2 moles H2O/ 1 mol O2) =
= (10^-2 / 32) x 2 = 6.25 x 10^-4 moles H2O
conversion factor 2moles H2O = 1 mol O2
MM O2 = 32g/mol
mass O2 = 10 mg = 10 x 10^-3 g
The particle(s) found inside the nucleus are called:
Answers
What are the differences between grasses and legumes? advantages and disadvantages of each
Answers
The differences between grasses and legumes are,
The grasses tend to have more digestible fiber than legume plants.Legumes have more protein , energy and micronutrient due to their abundant leaves as compare to grasses.The nutrient composition is an obvious and major difference between the two plants.The advantage and disadvantage of grasses are given below.
Advantage:
Grasses helps to keep air clean, trap carbon dioxide , reduce erosion from storm water runoff , improve soil , decreases noise pollution and reduce temperature.
Disadvantage:
It is necessary to cut grasses regularly.Sometime grasses harmful to the environment . Likewise rainwater runoff from lawns can carry pesticides and fertilizer into river , lake ,streams and ocean via the sewer system.The advantage and disadvantage of legumes are given below.
Advantage:
The legumes supply nutrients essential to our body which supports our health.Disadvantage:
It lower persistence than grass under grazing It has high risk of livestock bloat It is difficult to conserve as silage or hay.learn about legumes
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am i correct?????????????????????????????
Answers
Answer:
yep you are correct.
Explanation:
Which type of circulation does the right side of the heart provide?
a. pulmonary
b. cerebral
c. extremity
d. systemic
Answers
The right side of the Heart provides Pulmonary Circulation.
What is a Heart?
The main organ of your circulatory system, a web of blood veins that circulates blood throughout your body, is your heart. Your heart rate and blood pressure are also controlled by other bodily systems.
The heart is a type of pumping machine that is used to pump blood through the vessels of your body. This includes carrying out oxygen and nutrients in the body and carrying out carbon dioxide from the body.
Therefore the heart is a very important part of our body.
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Please solve number 5!! I’ll mark most brainliest!
Answers
Jejsjsnxnnsnsbdbbdbdbd
Answer: 5.248
Explanation: 0.53/0.1010 = 5.24752475248, and round to the thousandths.
What is 9.871 x 10^-3 in standard form? *
Answers
Answer:
0.009871
Explanation:
\( 9.871\times 10^{-3} = 0.009871\)
Answer:
.009871
Explanation:
A sample of gas consists of oxygen (molecular mass 32.0 g/mol) and neon (20.0 g/mol). The sample has a mass of 226 g and contains a total of 8.00 moles of gas. What is the mass of oxygen in the sample? g
Answers
The mass of oxygen is 128 g
Given that a sample of gas consists of oxygen (molecular mass 32.0 g/mol) and neon (20.0 g/mol). The sample has a mass of 226 g and contains a total of 8.00 moles of gas. We are required to find the mass of oxygen in the sample.
Let us suppose that the number of moles of oxygen is x. Now, we know that the total number of moles of gas is 8 moles. Therefore, the number of moles of neon is (8 - x).
Molar mass of oxygen = 32 g/mol
We can calculate the mass of oxygen from the number of moles of oxygen and molar mass of oxygen as follows:
Number of moles of oxygen × Molar mass of oxygen = Mass of oxygenx × 32 = Mass of oxygen
Let us find the mass of oxygen:
Mass of neon = Total mass of gas – Mass of oxygen
226 – Mass of oxygen = Mass of neon
226 – Mass of oxygen = (8 – x) × 20
Simplifying the equation:
226 – Mass of oxygen = 160 – 20x + x
226 – Mass of oxygen = 160 – 19x
Mass of oxygen = 66 – 19x
The total number of moles of gas is 8 moles
Hence, Number of moles of oxygen + Number of moles of neon = Total number of moles of gasx + (8 - x) = 8⇒ 8 = 8Therefore, the value of x = 4
We can calculate the mass of oxygen as follows:
Number of moles of oxygen × Molar mass of oxygen = Mass of oxygen
4 × 32 = 128 g
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If you wanted to find a type of atom in your little finger that has been in its present form (been the same element) since the beginning of the universe, which element should you look for
Answers
An atom that has been present in the little finger and has been in its present form since the beginning of the universe is the element calcium.
The human body, just like every other thing in the universe is composed of atoms. An atom is the smallest particle of a substance that can take part in a chemical reaction.
An atom that has been present in the little finger and has been in its present form since the beginning of the universe is the element calcium. Calcium is found in abundance in human extremities.
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what are two examples of the codominance in animals or plants
Answers
Answer:
Examples of codominance in animals include speckled chickens, which have alleles for both black and white feathers, and roan cattle, which express alleles for both red hair and white hair. Codominance is also seen in plants.
Identify the number of significant figures in each measurement. Type the correct answer in each box. Use numerals instead of words.
Answers
Answer:
92
98
35
35
Explanation: