What is the percent composition by mass of sulfur in the compound MgSO4 (gram formula mass = 120 g/mol)?

Answers

Answer 1

26.7% is the percent composition by mass of sulfur in a compound named magnesium sulfate. Explanation: Molar mass of compound = 120 g/mol.

Related Questions

If I have 8.5 moles of gas at a temperature of 83 °C, and a volume of 100.0 liters, what is the pressure of the gas?

Answers

Answer:

1.18 atm

Explanation:

We need to use the Ideal Gal Law for this question:

PV = nRT, where P is the pressure, V the volume, n the moles, R the gas constant, and T the temperature in Kelvins.

I'll choose a gas constant that has units compatible with the given conditions:

R = 0.08206 (L*atm)/(K*mol)

P = (8.5 moles)*(0.08206 (L*atm)/(K*mol))*(365.1K)

Make sure all the units cancel except atmospheres.

P = 1.18 atm

After performing an experiment in the lab, Michelle finds that she has produced 15.6 g of compound. She calculated that the theoretical yield of her reaction was 17 g. What percent yield did Michelle achieve?
a) 109%
b) 91.8%
c) 8.2%
d) 0.918%

Answers

Answer:

Explanation:

percentage yield = mass of what is produced ÷ theoretical yield x 100

percentage yield = 15.6÷17=0.9176470588235

x 100 = 91.76

this rounds to 91.8%, so the answer is b. :)

109% because it is the right answer

PLEASE HELP!!!!!!!!!!!

Answers

Heat change

Q1 = 27 x 4.184 x (314-273)=4631.688 J

n H₂O = 27 g : 18 g/mol = 1.5 moles

Q2 = 1.5 x 40.7 = 61.05 J

Q3 = 27 x 2.093 x (273-263)=565.11 J

Q4 = 4631.688 + 61.05 + 565.11 = 4987.848 J

Yeast contribute to beer brewing by producing ________ during alcohol fermentation. ethanol ethanol methanol methanol oxygen

Answers

Yeast is a substance which contributes to beer brewing by producing ethanol during alcohol fermentation.

What is Fermentation?

This a process in which carbohydrate is converted into an acid or alcohol. A common fungus used by brewing companies in fermentation processes is referred to as Yeast.

It converts Sugar to the following products:

ethanol, CO2Heat

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Imagine the movement of gas particles in a closed container. According to the kinetic molecular theory, which statements below are true of the gas particles? Check all that apply. Gas particles act like tiny, solid spheres. Gas particles are in constant, random motion. Gas particles at lower temperatures move faster. Collisions are elastic, there is no energy lost as the particle hits the sides of the container. Slower moving particles collide more often and with more force with the container.

Answers

Answer:
The answers are:

1. Gas particles act like tiny, solid spheres.
2. Gas particles are in constant, random motion.
4. Collisions are elastic, there is no energy lost as the particle hits the sides of the container.

Hope this helps!

According to the Kinetic Molecular Theory, the statements that are true of the gas particles are:

Gas particles act like tiny, solid spheres.Gas particles are in constant, random motion.Collisions are elastic, there is no energy lost as the particle hits the sides of the container.

What is the Kinetic Molecular Theory?

The Kinetic Molecular Theory actually states that the particles of gas are in motion constantly and their collisions are perfectly elastic.

This theory is actually used to give explanations for Boyle's and Charles' laws.

According to the Kinetic Molecular Theory, the collisions of the gas are elastic and are in constant motion.

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What is the atomic number and mass number of calcium ?

Answers

Answer:

Calcium has an Atomic number of 20 and Atomic mass of 40.078 u

Hope this helps!

During an investigation, hair samples are taken from either the head or pubic area of a victim.

A. True
B. False

Answers

Answer:

A. True

Explanation:

it is possible to identify a hair as originating from a particular body area, the regions of the body that are primarily used in forensic comparisons are the head and pubic areas.

Forensic = the application of scientific methods and techniques to natters investigation by a court of law.

During an investigation, hair samples are taken from either the head or pubic area of a victim. This statement is true.

What is investigation ?

A thorough search for facts, particularly those that are obscure or need to be sorted out in a complicated situation, is known as an investigation. An investigation's main objective is often to ascertain how or why something occurred. Investigations are frequently formal, official processes.

Establishing pertinent data to support or refute claims of fraud and corruption is the goal of an inquiry.

It takes subjective thought to develop justifiable justifications for beliefs. It is conceivably the most significant line of thought an investigator will follow. It is a way of thinking that is founded on the facts, information, and evidence the investigator has gathered throughout their inquiry.

Thus, During an investigation, hair samples are taken from either the head or pubic area of a victim.

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PLZ HELP ON THESE QUESTIONSSS

Answers

Answer:

wat

Explanation:

3. Ans is 1.11 molal = 1.1 molal

I WILL GIVE BRAINLEST PLS HELP

Phosphorus forms many oxoacids. Indicate the oxidation number of phosphorus in each of the following acids:
(a) HPO3, (b) H3PO2, (c) H3PO3, (d) H3PO4, (e) H4P2O7, (f) H5P3O10.

Answers

Answer:I need it

Explanation: I have the same quision in my chemistry exam but i dont have the answer

Minerals are all naturally occurring solid substances with a definable chemical composition. They must also possess Group of answer choices the ability to be synthesized in the laboratory as well as be found in nature. metallic elements, such as iron, calcium, or magnesium. metallic luster. a fixed crystalline structure (spatial arrangement of atoms and ions).

Answers

They must also possess a fixed crystalline structure (spatial arrangement of atoms and ions).

Structure of minerals

Minerals are those naturally occurring substances that are required for proper growth of living organisms.

It is found both on earth and in food substances such as calcium, magnesium, iron.

Minerals are known to have spatial arrangement of atoms and ions. Which means the ions and atoms are not randomly arranged.

Therefore, minerals are all naturally occurring solid substances with a definable chemical composition because it possess a fixed crystalline structure.

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2 KCIO3 → 2 KCl + 3 02
If 195 grams of Potassium Chlorate (FM = 122.55 grams) decomposes, how much Oxygen (FM =
32.00 grams) will be produced in this reaction?

Answers

The amount of oxygen that would be produced will be 76.38 grams

Stoichiometric calculation

From the equation of the reaction, the mole ratio of KCIO3 to O2 is 2:3. That is, for every one mole of KCIO3 that decomposes, 1.5 moles of oxygen is produced.

Mole of 195 grams KCIO3 = 195/122.55

= 1.59 moles

Equivalent mole of O2 = 1.59 x 3/2

= 2.39 moles

Mass of 2.39 moles oxygen = 2.39 x 32

= 76.38 grams

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What are examples of repurposing land as part of land reclamation? Select the two correct answers.(1 point)

reintroducing wildlife to the ecosystem

building a golf course and golf club

restoring a local waterway

creating a community garden

planting trees to replace what was removed

Answers

Answer:

Building a Golf Course and golf club & Creating a Community Garden

Explanation:

I just took a Quick check with this Question and I got if Right! Hope this helped!

The examples of repurposing land as part of land reclamation are Building a Golf Course and golf club and the act of Creating a Community Garden.

Land reclamation is known to be the method that is often used in the making or creation of new land by the act of increasing the elevation of a waterbed or low-lying land.

This can be done also by pumping water out of muddy morass areas. Land reclamation is said to be gotten by increasing the level of a seabed or riverbed.

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1. Describe the process of gene splicing.

2. What are the functions of a restriction enzyme and ligase?

Answers

Answer:

The DNA is cut using special chemicals called restriction enzymes,.

DNA ligase are used to insert genes and other pieces of DNA into plasmids.

SOMEONE HELP ME PLEASE
Convert the answer from above to Kelvin

Answers

Answer:

313.15K

Explanation:

According to the Celsius to Kelvin formula, by adding 273.15, the temperature in Celsius can be converted to the temperature in Kelvin. Thus, 0°C = 0 + 273.15 = 273.15 K.

so to convert 40°c to kelvin

40+273.15

= 313.15K

determine the cation of each?
HURRY!!!

Answers

Answer:

Potassium (K)

Strontium (Sr)

Magnesium (Mg)

Explanation:

The cation in Potassium Chloride (KCl) is Potassium (K) because of Potassium’s placement on the periodic table it has a charge of +1 while Chlorine has a charge of -1, making it the anion with a 1:1 ratio.

The cation in Strontium Chloride (SrCl2) is Stronitum (Sr) because of Strontium’s placement on the periodic table it has a charge of +2 while Chlorine has a charge of -1, making it the anion but since there are two Chlorines present in the formula, a 1:2 ratio.

The cation in Magnesium Chloride (MgCl2) is Magnesium (Mg) because of Magnesium’s placement on the periodic table it has a charge of +2 while Chlorine has a charge of -1, making it the anion but since there are two Chlorines present in the formula, a 1:2 ratio.

hope this helps :)

Is my answer correct?

Answers

Answer:

I don't think your answer is correct, It's B

Explanation:

I agree with the person above it’s b

1. What type of circuit is in the diagram?
parallel circuit
series circuit

Answers

Answer:

A series circuit is defined as the circuit in which a number of resistances are connected one after the other.. In a series circuit, the flow of current follows a single path.

A parallel circuit is defined as the circuit in which a number of resistances are linked across each other in such a way that one terminal of each resistance is connected to form a junction point while the remaining end is also connected to form another point.

You havent added the diagram so i cant tell you the answer, but i added the definition of each circuit, see if that helps!

An angle grinder is best suited for use with which material?.

Answers

any sort of metals/solid such as copper steel iron

what three factors determine if something is pollutant?

Answers

Answer:

They include: Chemical nature of the pollutant - how active and toxic it is to humans, plants and animals; Concentration - the amount of the chemical per unit volume of air, water, soil, and; Persistence or longevity - how long the pollutant remains in the environment in its harmful form.

Explanation:

Air pollutants like ozone, particulate matter, carbon monoxide, nitrogen oxide, sulfur dioxide, lead cause atmospheric pollution which regards to ozone depletion, GH effect, climate change and human health effects. If anyone say the main factors of air pollution beyond of industry, means of transportation, solid waste generation and urbanization.

Growing urbanization and industrialization grows more pollution. Due to a large number of population in the world, more pollution is generated. Specifically if we talk about air pollution, due to steady increase in number of industries, the gradient level is deteriorating day by day. There is no good if we just talk about sustainable development if we are not following it.

Answer:

Explanation:

Chemical nature of the pollutant ConcentrationPersistence

The characteristic which distinguishes a true solid from other phases of matter at STP is that in a true solid the particles are 1 vibrating and changing their relative positions by vibrating without changing their relative positions 2 3 motionless but changing their relative positions 4 motionless without changing their relative positions.

Answers

Answer:

Background

Solids – relatively rigid, definite volume and shape. In a solid, the atoms and molecules are attached to each other. ...

Liquids – definite volume but able to change shape by flowing. In a liquid, the atoms and molecules are loosely bonded. ...

Gases – no definite volume or shape

giving brainliest

Construct a balanced symbol equation for the formation of methane from carbon and
hydrogen. (1 mark)

Answers

Answer:

reference attached

Explanation:

hope it helps you<3

C
H
4
+
2
O
2

→

C
O
2
+
2
H
2
O

This is the balanced reaction equation for the combustion of methane.
Explanation:
The Law of Conservation of Mass basically states that matter can neither be created nor destroyed. As such, we must be able to show this in our chemical reaction equations.
If you look at the equation above, you'll see an arrow that separates the reaction equation into two parts. This represents the direction of the reaction.
To the left of the arrow, we have our reactants.

To the right of the arrow, we have our products.

The quantity of each individual element in the left must equal the quantity of each individual element in the right.
So if you look below, you'll see the unbalanced equation, and I'll try to explain how to balance the reaction.
C
H
4
+
O
2

→

C
O
2
+
H
2
O

Our reactants in this equation are
C
H
4
and
O
2
.
Our next step is to break these down into individual atoms.
We have:
1 C atom, 4 H atoms & 2 O atoms.
If you're confused by this, look to see the little number to the bottom right of each element, the subscript, and it tells you how many of each atom are in the molecule. Make sense?
Now we look to the other side of the equation.
Here we see our products are
C
O
2
+
H
2
O

Again, we break these down into individual atoms again.
We have:
1 C atom, 2 H atom, 3 O atoms
This isn't right? What's wrong?
Yes, do you see it? We have more H atoms in the reactant side than the product side, and more O atoms in the product side than the reactant side. According to the Law of Conservation of Mass though, this isn't possible.
So how do you suppose we fix this?
We have to make the number of atoms on both sides equal, don't we? When we achieve this, we'll have a balanced equation.
To change the number of atoms, we can place a number in front of it, known as the coefficient. This multiplies the number of every atom by whatever number you use as the coefficient. BEWARE however, that we can never change the subscript (the little number), because doing so changes the chemical.
We have 1 C on both sides of the reaction - so this doesn't need to change.
We have 4 H on the left, and 2 H on the right. To make them equal, we place a 2 in front of the
H
2
O
like so;
2
H
2
O
. This gives us 4 H on both sides, but it also gives us another O, making the total 4 O on the right....but we still only have 2O on the left, don't we?
Place a 2 in front of the
O
2
to make 4 O on the left.
Now your reaction equation is balanced, and should look like this...
C
H
4
+
2
O
2

→

C
O
2
+
2
H
2
O

What is the iupac name of the oxyacid formed from chlorite?.

Answers

The IUPAC name of the oxyacid formed from chlorite is chlorous acid.

All oxyacids have the acidic hydrogen bound to an oxygen atom, so bond strength (length) is not a factor, as it is with binary nonmetal hydrides. Rather, the electronegativity of the central atom and the number of oxygen atoms determine oxyacid acidity. For oxyacids with the same central atom, acid strength increases with the number of oxygen atoms attached to it. With the same number of oxygen atoms attached to it, acid strength increases with increasing electronegativity of the central atom.

Compared to the salts of their deprotonated forms (a class of compounds known as the oxyanions), oxyacids are generally less stable, and many of them only exist formally as hypothetical species, or only exist in solution and cannot be isolated in pure form.

Thus, the IUPAC name of the oxyacid formed from chlorite is chlorous acid.

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Which statement best describes how a compound is different from an element?

Answers

Answer:

An element is a substance that cannot be chemically decomposed into simpler substances. An atom is the smallest particle of an element that can take part in chemical reactions. A compound is a substance formed from two or more elements chemically joined (bonded) together.

Explanation:

In the Rutherford nuclear-atom model, ________.

A)the heavy subatomic particles, protons and neutrons, reside in the nucleus

B)the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass

C)the light subatomic particles, protons and neutrons, reside in the nucleus

D)mass is spread essentially uniformly throughout the atom

Answers

A, the protons and neutrons are heavier than electrons. The electrons orbit the nucleus, and have negligible mass.

Living things need to reproduce in order to propagate the species and survive. Males and females are set up in such a way that reproduction is possible, but sometimes humans do not have the ability to reproduce. Science has advanced technologies tremendously for the past few decades that artificial reproduction is now an option.

For this performance task, research and define the 4 Artificial Reproductive Technologies. After gathering information, reflect on the following questions. Write your answers based on your research on a separate sheet of paper.

a. What are the ethical implications of these technologies?

b. Should humans be allowed the ability to artificially reproduce? What is your opinion on this and why?

c. Should these technologies not exist, what would be the impact on others should one person not be able to reproduce?

Answers

Artificial reproduction technologies enables individuals unable to conceive to be able to conceive and give birth.

Although ethical issues are raised, artificial reproduction technologies are important for people who cannot naturally conceive if the technology is used within the allowed ethics.

What are artificial reproduction technologies?

Artificial reproduction technologies refers to the technologies available which enables individuals unable to conceive to be able to conceive and give birth.

Some artificial reproduction technologies includes;

in vitro fertilization (IVF)gamete intrafallopian transfer (GIFT)pronuclear stage tubal transfer (PROST)tubal embryo transfer (TET)zygote intrafallopian transfer (ZIFT).

The ethical implications is that humans now can choose between which babies to be born and which are not, thereby playing God.

Though, many ethical issues arise, humans should be allowed to use this technologies in order to help those who are unable to give birth to be able to do so.

Without these technologies, it would be impossible for people who can not give birth to do so, which could cause a lot of mental and physical anxiety.

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A covalent molecule Q contains exactly 6 shared electrons. What is Q

Answers

Answer:

oxygen has six shared electrons

Covalent molecules are the group of atoms that shares a covalent bond. Ammonia is a molecule that shares three pairs or six electrons to form a covalent bond.

What are covalent bonds?

Covalent bonds are the intermolecular bonds that mutually involve the sharing of electrons between the two or more atoms of the molecules. In ammonia three pairs of electrons are in a covalent bond.

In an ammonia molecule nitrogen have five electrons in its outer shells and hydrogen have one electron each. When three hydrogen shares their electrons with nitrogen to make a covalent bond the octet of the nitrogen atom is completed.

Therefore, covalent molecule Q is ammonia.

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Fill the chart below (23.46.haploid,diploid,gametes, body cells, reproduction, growth/healing”

Answers

Answer:

A. Gametes are formed by meiosis and are haploid, while body cells are formed by mitosis and are diploid.

Explanation:

Meiosis is a type of cell division that produces four haploid daughter cells (gametes) from one cell, while mitosis produces two diploid daughter cells (i.e., somatic cells). In both cases, the DNA is replicated during interphase of the cell cycle

how much oxygen is typically required to complete a combustion reaction
A.Triple to Quadruple the amount listed
B. Same as the amount listed
C. Ten times amount listed
D. Double or triple the amount listed

Answers

Answer:

Mass of oxygen required = 19.5 moles × 16 g/mol = 312 g.

Explanation:

Kayla is examining different soil samples and making notes about how well each sample sticks together. She has two soils that she has classified as dry, ones as wet and one as cemented. Which soil property is she examining?
a. consistency
b. density
c. structure
d. texture

Answers

a. consistency because she's making notes about how well each sample sticks together.

Answer:

A. consistency

Explanation:

I took the test

Which material would result in the greatest amount of energy transfer?

An absorber that is dark in color and rough.
A reflector that is dark in color and smooth.
An absorber that is light in color and rough.
A reflector that is light in color and smooth.

Answers

The material which would result in the greatest amount of energy transfer is a reflector that is light in color and smooth.

What is Energy transfer?

This is the process by which energy is relocated from one system to another through methods such as conduction, radiation etc.

Energy is easily radiated from a light in color and smooth material as a result of its high reflective capacity which is why option D was chosen.

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Answer:

Explanation:

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