Answer:
Filtration can be used to separate an insoluble solid from a liquid, or a precipitate from the reaction mixture in which it formed. The solid which collects in the filter paper is called the residue. The clear liquid which passes through the filter paper is called the filtrate.
Explanation:
i had this question before
Which of these is an oxidation half-reaction? upper v superscript 3 plus, plus e superscript minus right arrow upper v superscript 2 plus. upper f lower e, right arrow upper f lower e superscript 3 plus, plus 3 lower e superscript minus. upper c superscript 4 plus, plus 2 e superscript minus right arrow upper c superscript 2 plus.
Among the given reactions, those reaction which is an oxidation half-reaction is Fe → Fe³⁺ + 3e⁻.
What is oxidation reaction?Oxidation reaction in terms of electron will be described as those reactions in which removal of electron takes place.
V³⁺ + e⁻ → V²⁺In this reaction addition of electron takes place, so it is not an oxidation reaction.
Fe → Fe³⁺ + 3e⁻In this reaction removal of electrons takes place, so this is an oxidation reaction.
C⁴⁺ + 2e⁻ → C²⁺In this reaction addition of electron takes place, so it is not an oxidation reaction.
Hence Fe → Fe³⁺ + 3e⁻ shows oxidation half-reaction.
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Answer: The picture down below..Hope this helps <333
Explanation:
What can be used to determine the age of a victim between age 15 and 22 from dental remains?
Answer:
When determining the age of a victim withing ages 15-22, dental remains provide comparison of the stage of tooth formation shown in X-rays and bone.
If 5.00 × 1010 kilojoules of energy is released from a fusion reaction, what amount of mass in grams was lost? Use: `Δm = E/c^2` Recall that c = 3 × 108 meters per second.
choices:5.56 × 10-1
5.56 × 10, -, 1
5.56 × 10-4
5.56 × 10, -, 4
5.56 × 10-7
5.56 × 10, -, 7
5.56 × 10–10
The amount of the mass in grams that was lost from the fusion reaction is 5.56×10¯⁷ Kg
Data obtained from the question Energy (E) = 5×10¹⁰ JSpeed of light (c) = 3×10⁸ m/sMass (m) =?How to determine the mass
Energy is defined as the ability to work.
The mass can be obtained as follow
E = mc²
Divide both side by c²
m = E / c²
m = 5×10¹⁰ / 3×10⁸
m = 5.56×10¯⁷ Kg
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We’re learning about mole I need help on these last questions of my chemistry packet please help me
Answer:
1. [tex]2.879 * 10^{23}[/tex] atoms of AgCl
2. [tex]1.96 * 10^{7}[/tex] g of Bi
3. [tex]C_2H_8O[/tex]
Bonus: [tex]8.31*10^{23}atomsC[/tex]
Explanation:
1) If there are 68.54 grams of silver chloride, first know the chemical formula of silver chloride is AgCl. Then, you can use the molar mass of AgCl, found by adding the molar mass of its constituent elements on the periodic table, and unit conversions to solve for the amount of atoms of AgCl. Keep in mind that Avogadro's number states that there are [tex]6.02 * 10^{23}[/tex] atoms in one mole of a substance. Keep in mind that your answer will have four significant figures.
[tex]68.54 grams AgCl* \frac{1 mol AgCl}{(107.87gAg + 35.45gCl)} *\frac{6.02*10^{23}atoms}{1 mol} = 2.879 atomsAgCl[/tex]
2) If there are [tex]5.64 * 10^{28}[/tex] atoms of bismuth, you can use the molar mass of Bi found on your periodic table and constants in order to calculate the mass of Bi.
[tex]5.64*10^{28}atoms Bi * \frac{1 mol Bi}{6.02 * 10^{23}atoms Bi} * \frac{208.98gBi}{1 molBi} = 1.96 * 10^7gBi[/tex]
4) When asked for the empirical formula, recall that the empirical formula of a compound differs from its chemical formula, as the empirical formula is essentially the "greatest common factor" version of a chemical formula. For example, glucose, [tex]C_{6} H_{12}O_{6}[/tex], and acetic acid, [tex]CH_3COOH[/tex] (or [tex]C_2H_4O_2[/tex]) have different chemical formulas, but their empirical formulas are the same, represented as [tex]CH_2O[/tex], where the greatest common factor 6 is factored out of glucose to obtain this formula, while the greatest common factor 2 is factored out of acetic acid.
Given this information, you can imagine that there are 100g of carbon, hydrogen, and oxygen in this compound, so that the percentages given are easy to convert into mass. (Note that since empirical formula is a simplified form, the molar mass of the compound won't matter). This gives us a compound with 50.0g of carbon, 33.3g of oxygen, and 16.7g of hydrogen. We can then convert those values into moles:
[tex]50.0gC * \frac{1molC}{12.01gC} = 4.16molC\\33.3gO * \frac{1molO}{16.00gO} = 2.08molO\\16.7gH * \frac{1 mol H}{1.01gH} = 16.5molH[/tex]
Now, you can express a formula for this compound as [tex]C_{4.16}H_{16.5}O_{2.08}[/tex].
The lowest of these numbers is 2.08, or the number of moles of O in the formula. Dividing each of the subscripts by 2.08 will result in the following formula:
[tex]C_{4.16/2.08}H_{16.5/2.08}O_{2.08/2.08} = C_2H_8O[/tex]
Note: Depending on if 1.00g/mol or 1.01g/mol was used for the molar mass of hydrogen, either 7.93 or 8.03 would be found to be the subscript of H. This is simply factored out by rounding either value to simply 8.
Bonus) Knowing that there are 25.6g of the substance in question, we can simply find 64.9% (the percent composition by mass of carbon for the unkown compound) of the total mass of the unknown compound.
[tex]25.6g * 0.649 = 16.6gC[/tex]
Now, simply use the molar mass of carbon, 12.01g/mol, to find the moles of carbon present.
[tex]16.6gC * \frac{1molC}{12.01gC} = 1.38molC[/tex]
Now, using Avogadro's number, convert from moles to atoms. Keep in mind that your answer will have three significant figures.
[tex]1.38molC * \frac{6.02*10^{23}atomsC}{1molC} = 8.31*10^{23}atomsC[/tex]
What is the chemical formula for disulfur difluoride?
A. 252F
B. 2SF
C. S2F2
D. SZF
its C
All-seeing eyes:
my eyes see all, every answer so it is C
Explanation:
my eyes only speak the truth
Question 1 of 10
What is a flame test used for?
Answer:
B
Explanation:
A flame test is used to identify an unknown sample by its emission spectrum. The correct answer is option B.
Flame tests are used to identify the presence of certain metal ions in a sample based on the color of the flame that is produced when the sample is heated.
When a metal ion is heated in a flame, it absorbs energy from the flame and becomes excited. As the metal ion returns to its ground state, it releases energy in the form of light, which causes the flame to emit a characteristic color.
The color of the flame is specific to the metal ion that is present and can be used to identify the metal ion based on a color chart.
Therefore option B. "to identify an unknown sample by its emission spectrum" is the correct answer.
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Which reaction is exothermic? ch4 2o2 right arrow. co2 2h2o 891 kj nh4no3 h2o 25 kj right arrow. nh4 (aq) no3-(aq) 2h2o 286 kj right arrow. 2h2 o2 n2 o2 181 kj right arrow. 2no
Answer:
All are Endothermic reaction.
Explanation:
Answer:
CH4 + 2O2 --> CO2 + 2H2O + 891 kJ
Explanation:
Edge
What is the empirical formula for a compound that has 1. 5 moles of copper and 0. 5 moles of phosphorus
How many moles of h2so4 are needed to completely neutralize 0.0164 mol koh? mol h2so4
Answer: Heyo Kenji Here! Here's your answer- :0.0082 moles
Explanation: Hope this helps!
Have a nice day!
- Kenji ^^
Answer:
0.0082
Explanation:
What is the correct representation of a hydrated salt?.
An inorganic salt hydrate (hydrated salt or hydrate) is an ionic compound in which several water molecules are attracted by the ions and therefore enclosed within its crystal lattice. The general formula of a hydrated salt is MxNy.
The correct representation of the hydrate salt has the generic formula MxNy . nH₂O.
What is hydrate salt?Hydrate salt is defined as an ionic substance where several water molecules are drawn to the ions and hence trapped inside the crystal lattice. More than 50% of chemical industry products start with salt as the primary constituent. Additionally, the glass, paper, rubber, and textile sectors employ hydrated salt.
A hydrate is a salt that has a chemical interaction with water, and its formula is salt x H₂O, where x represents how many water molecules are joined to one salt molecule. CaSO₃.3H₂0, or calcium sulfate trihydrate, is an example of a hydrate and is written in this way even though the water molecules are not technically a part of the formula.
Thus, the correct representation of the hydrate salt has the generic formula MxNy . nH₂O.
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a student makes a model of the solar system on a poster board . the student uses foam balls to represent object on the solar system . the student model is shown . explain one error concerning the size of the foam balls on the model
The model of the solar system by the student would contain an error if he did not use different ball sizes which are in proportion to the size of each planet.
What is the solar system?The solar system is the system of the Sun and it's nine planets.
The Sun is the main star and source of energy in the solar system.
The planets in the solar system are of different sizes and orbit at various distances around the Sun.
This a student modelling the solar system should use different ball sizes in proportion to the size of each planet.
Therefore, the model of the student would contain an error if he did not use different ball sizes which are in proportion to the size of each planet.
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Which of the following statements is true?
Automobiles are the leading cause of acid rain.
Both plants and animals can make protein using nitrogen compounds.
Animals add water vapor to the air through respiration.
Plants add water vapor to the air through photosynthesis.
Answer:
I think it's C. Animals add water vapor to the air through respiration
Explanation:
Identify and describe the different forms of precipitation shown in the images.
Two forms of precipitation. One is very small round pellets and the other is larger chunks or balls of ice.
Answer:
Sleet and hail, sleet are tiny drops of water that freeze when it rains. Hail forms when a thunderstorm lifts a water droplet above the freezing level.
Explanation:
What concentration of OH is required to created a pOH of 1.3.
Answer:
0.0501
Explanation:
OH=10^-poH
OH=10^-1.3
=0.0501
When broken down into root words what does thermohaline mean
how many grams is 0.456 mol of CaCO3 ?
Answer:
im not sure if this is right but i got 130.8760584
(keeping in mind that 1 mole is equal to 1 moles CAcO3, or 287.0089 grams.)
i may have rounded it wrong but hope this helps
Describe in brief the role of zinc in human body.
BRAINLIEST! PLEASE HELP! To plate gold onto a base metal, the overall reaction is Au+3(aq) + 3e− → Au(s). How many seconds would it take at a current of 3.5 amps to plate out 2.50 grams of gold?
a. 349 s
b. 1049 s
c. 9.5 x 10^-4 s
d. 17.4 s
The required time it would take at a current of 3.5 amps to plate out 2.50 grams of gold is 1,049 seconds.
How do we calculate the required time?According to the faraday's second law, equation to calculate the time will be given below:
W = ZIt, where
W = deposit mass = 2.50 grams
Z = equivalent mass / 96500 = 65.6 / 96500 = 0.000679
I = current = 3.5 amp
t = required time = ?
On putting values in above equation, we get
t = (2.50) / (0.000679)(3.5)
t = 1,054 sec = 1,049 s (approx)
Hence required seconds to plate out 2.50 g of gold is 1,049 sec.
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1.60 moles of gas has a volume of 7.50 L at 471 kPa. What is current temperature of gas?
Answer: Heyo Kenji Here! Here's your answer- 1.60 moles of a gas has a volume of 7.50L at 471 kPa. What is the current temperature of the gas? answer choices. (265 K).
Explanation: Hope this helps!
Have a nice day!
-Kenji ^^
Describe how intermolecular forces affect solvation.
Answer:
Solvation is affected by inter molecular forces in a sense that these attractive forces overcome the forces that holds the solute and solvent particles together making the solute particles separate form the solvent particles.
Explanation:
hope this helps
A student writes the following explanation of how one type of compound is formed. these compounds are made by the repeated joining of one smaller unit to the end of a growing chain. the units are generally alkenes, which retain all their atoms in the chain. a compound which undergoes a similar process is polyethylene. which process is being described? condensation polymerization addition polymerization dehydrohalogenation dehydrogenation
In the given question according to the information the process of polymerization is an addition polymerization.
What is polymerization?Polymerization is a process in which addition of many small molecules takes place for the formation of a large three dimensional substance known as polymer.
In the polymerization of polyethene the small repeating molecule is ethene and in this process product formed due to the addition process to the double bond of the ethene.
In condensation polymerisation removal of water molecule or any other molecule takes place.In dehydrogenation polymerisation removal of hydrogen molecule takes place.In dehydrohalogenation polymerisation removal of hydrogen halide molecule takes place.Hence given process is an addition polymerisation.
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Answer:
The answer is B. addition polymerization
Explanation:
Reaction mechanisms will always have a minimum of how many steps?
how are primary and secondary pollutants alike?
Answer:
Primary pollutants are emitted from natural or anthropogenic sources directly into the atmosphere, while secondary pollutants result from the chemical reactions or the physical interactions between the primary pollutants themselves or between the primary pollutants and other atmospheric components.
Which substance has a standard enthalpy of formation of zero?.
Answer: In its natural condition, a pure element
Which takes longer to orbit the Sun: Mars or Jupiter?
Answer:
jupiter
Explanation:jupiter is farther from the sun, so therefore it takes longer.
Read the sentences from the Newsela article, "First All-Female Spacewalk Will Take Place During Women's History Month. "
"'I remember telling my mom at that time, and I never deviated from what I wanted to be. Something about exploration has fascinated me from a young age. "
What is the meaning of deviated?
A: struggled
B: recovered
C: strayed
D: profited
Answer:
C ; strayed
Explanation:
I took the k-12 quiz.
Answer:
C
Explanation:
I TOOK THE TEST
HELP ME ASAP!
what is the purpose of putting cabbage water, baking soda, and vinegar experinment?
test for different types of molecules called acids and bases.
Students investigated the motion of wooden blocks on ramps. They used two boards,
each two meters long, to create ramps. They set the ramps up at different heights, as
shown in the diagram below. Next they took two identical blocks (I and II) and placed
one at the top of each ramp. They placed the blocks so that the back edge of each
block was even with the edge of the ramp (distance =0 meters). The students held the
O
blocks so that the blocks would not slide until the students released them. The students
released the blocks at time = 0 seconds. They measured the total distance traveled by
each block at 1-second intervals as the blocks slid down the ramps. The students recorded
their results as shown below.
Name two forces that acted on the block as they slide down the ramps. Describe how each forced you listed affected on the motion of the block.
The forces that act on the blocks as they descend the ramp are;
Weight of the blockReaction force on the blockApplied forceFrictional forceWhat is force?Force is that which is able to produce a push or a pull. Force causes an object to move from one point to another. For the body that is moving down the ramp there are four forces that act on it;
Weight of the blockreaction force on the blockApplied forceFrictional forceThe weight of the block moves it downwards, the reaction force moves the block upwards, the applied force moves the block forward while the fricional force opposes the forward movement of the block.
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how would leaving molecular sieves uncapped or in an open beaker for an extended period of time affect their functionality
The molecular sieves absorbing the water in the air is how leaving molecular sieves uncapped for an extended time will affect their functionality.
What is Functionality?This is the ability of a substance to adequately suits its purpose or main functions when used.
The molecular sieves will absorb the water in the air, thereby decreasing their ability to absorb in the experiment is how leaving molecular sieves uncapped for an extended time will affect their functionality.
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The reaction between sodium hydroxide and hydrochloric acid is considered which type?.