Experimental Data

Enter the data shown in the video for Unknown Sulfate #23 below or where required, calculate the value from your data:

Mass of empty 250-mL beaker (from video) =129.536g
Mass of 250-mL beaker and unknown sulfate (from video) =129.840g
Mass of unknown sulfate (calculated) =0.304g
Mass of empty crucible (from video) =10.320g
Mass of crucible and barium sulfate (from video) =10.723g
Mass of barium sulfate =0.403g

Calculations and Conclusions

Calculate the mass of sulfate in the unknown sample:

Mass of sulfate in unknown =_______g

Calculate the percentage by mass of sulfate in the unknown sample:

Mass percent of sulfate in unknown =
%
The cation in the unknown sulfate is one of the following:

Al3+ Na+ Ni2+ K+ NH4+ Cd2+

For each of these six cations, write the formula of its sulfate, and calculate the percentage mass of sulfate in the compound.

Formula of aluminum sulfate =

Mass percent of sulfate in aluminum sulfate =
%
Formula of sodium sulfate =

Mass percent of sulfate in sodium sulfate =
%
Formula of nickel(II) sulfate =

Mass percent of sulfate in nickel(II) sulfate =
%
Formula of potassium sulfate =

Mass percent of sulfate in potassium sulfate =
%
Formula of ammonium sulfate =

Mass percent of sulfate in ammonium sulfate =
%
Formula of cadmium sulfate =

Mass percentage of sulfate in cadmium sulfate =

Answers

Answer 1
This is a lot, Idek where to begin. Can you post the picture or something ?

Related Questions

What do you think the biggest risk with genetic engineering is?

Answers

Answer:

Harmful toxins from crops have been found in peoples blood.

GM crops can cause allergic reactions in crops

Its dangerous to mess with nature this way when it should be a natural thing.

Explanation:

I'm in both Biology and Chemistry so I know a lot!

Hydrocyanic acid is a weak acid. Therefore, the salt KCN is

Question 4 options:

Basic


Amphoteric


Neutral


Acidic

Answers

It is basic because of the fact that it has a strong base which is KOH and a weak acid HCN and the strong base causes it to remain more basic.

PLZ HELP NO LINKS
What cell structure is necessary for photosynthesis?
xylem
chloroplasts
cell walls
roots

Answers

multicellular
and photosynthesis are both needed
The answer is chloroplasts

how many moles are 20 grams of Helium ? ​

Answers

Answer: The correct answer is 5.00 moles

Explanation:

You read a primary source and a secondary source that discuss the same
experiment. There is a difference in the conclusions made by these two
sources. Which should you trust more, and why?
A. The primary source, because it is more confusing
B. The secondary source, because it is published in a well-respected
newspaper
C. The secondary source, because it is easier to read
D. The primary source, because it is written by the scientist who did
the work

Answers

Answer:

i think it's D tbh, just cus it was the scientist who did the work

Answer:

It depends on secondary sources and references of that secondary source. If it references just that primary source I would compare both of them and see the difference between them. Generally primary sources are more reliable but this situation is different.

The electrons in an atom tend to assume the arrangement that gives the atom the least possible energy
T
F

Answers

I think that true!!!

The given statement is correct or true.  

• The alignment of electrons in an atom is termed as the electronic configuration.  

• The electrons in an atom seem to assume the alignment, which gives the atoms the least possible energy.  

• This alignment of electrons is the most stable alignment and is known as the atom's ground-state electronic configuration.  

• In the ground state of an atom, the electron first enters the lowest energy orbital and later subsequent electrons are aligned in order of increasing energy. This is known as the Aufbau principle.  

Thus, the given statement is true or correct.

To know more about:

https://brainly.com/question/16562099

heat is the movement from areas of ___ temperature to areas of ___ temperature

Answers

Answer:

heat is the movement from areas of high temperature to areas of low temperature

he image shows two air fronts moving in a region. The cold front is moving faster than the warm front.



Which will likely happen if the cold front continues to advance faster than the warm front?


Cold air will pass over the warm air, causing dry weather in the region.
Cold air will pass over the warm air, causing dry weather in the region.

Cold air will push up the warm air, resulting in heavy rainfall in the region.
Cold air will push up the warm air, resulting in heavy rainfall in the region.

Cold air will push up the warm a

Answers

Answer:

Cold air will push up the warm air, resulting in heavy rainfall in the region.

Which part of the body transports molecules from food and air to the cells of the body

Answers

Answer:

Molecules from food and molecules of oxygen move from the mouth and the nose to cells of the body through a series of blood vessels, including veins, arteries, and microscopically small blood vessels (capillaries), that extend throughout the body.

Explanation: This is right

Answer: blood

Explanation: The circulatory system delivers oxygen and nutrients to cells and takes away wastes. The heart pumps oxygenated and deoxygenated blood on different sides. The types of blood vessels include arteries, capillaries and veins.

When the following equation is balanced, what is the coefficient of oxygen?
C2H5OH() + O2(g) --> CO2(g) + H2O()

Answers

Answer:

The answer is 3

C2H5OH + O2 CO2 +H2O (unbalanced)

C2H5OH +3O2(g). 2CO2(g)+3H2O(balanced)

According to the balanced chemical equation, C₂H₅OH + 3 O₂[tex]\rightarrow[/tex] 2 CO₂ + 3 H₂O the coefficient of oxygen is three.

What is chemical equation?

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

Learn more about chemical equation,here:

https://brainly.com/question/28294176

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I need this like NOW
An area on the map where we might see strong winds is:

Question 5 options:

near Maine


near California


near Washington D.C.


near Kansas City

Answers

No clue soryhuyyccvggghjj

HELP!

The law of conservation of energy states:

A. Energy increases exponentially with times

B. Total energy decreases due to energy output.

C. Energy cannot be created or destroyed.

D. Energy always remains in the same form.

Answers

Answer:

C

Explanation:

energy cannot be created or destroyed like solar energy for instance. it is already energy because it comes from the sun and for other reason.

Hope this helps!

KBr is the formula for an ionic compound. The fact that neither symbol is followed by a subscript means that there is a(an) of ions in the compound ​

Answers

Answer:

equal number of ions

Explanation:

They cancel each other out that's why there is none

how would you measure out five moles of a gas?

Answers

Don’t go there it’s not going to give you the answer

how many hydrogen molecules are there in 1 ton of hydrogen?​

Answers

Hydrogen gas(H2) has a molar mass of 2 g. Molar mass of a substance is defined as the mass of 1 mole of that substance. And by 1 mole it is meant a collection of 6.022*10^23 particles of that substance.

So number of moles of H2 are 0.5 in this case. And thus it means there are (6.022*10^23)*0.5 particles( here they are molecules) in 1g of H2.

Considering the definition of mass molar and Avogadro's Number, there are 3.0115×10²⁹ molecules in 1 ton of hydrogen.

First, the molar mass of hydrogen H₂, that is, the amount of mass that a substance contains in one mole, is 2 g/mole.

In this case, being 1 ton = 1,000,000 grams, the number of moles that 1 ton of hydrogen contains is calculated as:

[tex]1,000,000 gramsx\frac{1 mole}{2 grams} = 500,000 moles[/tex]

On the other hand, Avogadro's Number is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole.

Then, the number of molecules that 500,000 moles of hydrogen contains is calculated as:

[tex]500,000 molesx\frac{6.023x10^{23} molecules }{1 mole}[/tex]= 3.0115×10²⁹ molecules

Finally, there are 3.0115×10²⁹ molecules in 1 ton of hydrogen.

Learn more about:

mass molar: https://brainly.com/question/12695086?referrer=searchResultsAvogadro's Number: brainly.com/question/11907018?referrer=searchResults brainly.com/question/1445383?referrer=searchResults brainly.com/question/1528951?referrer=searchResults

what is the last element in the periodic table?

Answers

Answer:

Ununoctium

Explanation:

It's at the very end of the periodic table

Answer:

Ununoctium

Explanation:

Ununoctium is the last chemical element int the periodic table.

Which group of reptiles is the largest in terms of body size?

Answers

Answer : if you have time for learning and is in 6th grade the anwser is crocodilians

Explanation: i got it right

how many moles of ag can be produced if 250g of CU are reacted with excess agNo3, according to the equation Cu(s) + 2AgNO3(aq) -> 2Ag(s) + Cu(NO3)2(aq)?

Answers

Answer:

[tex]250 \times \frac{1}{63.5} \times \frac{2}{1} = 7.874mol \: ag[/tex]

A gas has a volume of 590 mL at a temperature of –55.0°C. What The temperature be if the volume expands to 15L at constant pressure?

Answers

Answer:

5542.37 K

Explanation:

Given that,

Initial volume, V₁ = 590 mL

Initial temperature, T₁ = -55°C = -55 + 273 = 218 K

Final volume, V₂ = 15 L

We need to find the final temperature of the gas. The relation between the volume and the temperature is given by :

[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]

Where

T₂ is final volume of the gas

Put all the values in above relation,

[tex]T_2=\dfrac{V_2T_1}{V_1}\\\\T_2=\dfrac{15\ L\times 218\ K}{590\times 10^{-3}\ L}\\\\T_2=5542.37\ K[/tex]

So, the required temperature is equal to 5542.37 K.

The diagram shows the sun's interior Convection are present in the convection zone Which describes how fluids change as they travel through the convection zone? Convection zone Radiation zone Core O They change to solids near the Sun's surface. They change to solids near the Sun's radiation zone O They become more dense near the Sun's surface. O They become more dense near the Sun's radiation zone​

Answers

Answer:

C: They become more dense near the Sun's surface.

Explanation:

I got it correct on EDG

I hope this helps!!!!!!!!

Can I have a brainliest

According to convection, the statement which describes how fluids change as they travel through the convection zone is  that they become more dense near the Sun's surface.

What is convection?

Convection works by areas of a liquid or gas heating or cooling greater than their surroundings, causing differences in temperature. These temperature differences then cause the areas to move as the hotter, less dense areas rise, and the cooler, more dense areas sink.

Often the areas of heating and cooling are fixed, and allow convective cycles or currents to become established. For example, a saucepan of water over a flame may develop convective currents as the water is heated from below, rises to the surface, and cools. Once cooled enough, the water then sinks back to the bottom of the saucepan where the cycle is repeated, and the convective overturning continues.

Learn more about convection,here:

https://brainly.com/question/4138428

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How many levels are in the classification system?
A: 7
B: 2
C: 4
D: 6

Answers

Answer:

7

Explanation:

There are seven major levels of classification: Kingdom, Phylum, Class, Order, Family, Genus, and Species.

So, the answer is option A.

The answer is A. 7

Good luck

What is the concentration of kl solution if 20.68g of solute was added to enough water to form 100ml solution?

Answers

Answer:

1.25 M

Explanation:

Step 1: Given data

Mass of KI (solute): 20.68 g

Volume of the solution: 100 mL (0.100 L)

Step 2: Calculate the moles of solute

The molar mass of KI is 166.00 g/mol.

20.68 g × 1 mol/166.00 g = 0.1246 mol

Step 3: Calculate the molar concentration of KI

Molarity is equal to the moles of solute divided by the liters of solution.

M = 0.1246 mol/0.100 L= 1.25 M

A 59.7 g piece of metal that had been submerged in boiling water was quickly transferred into 60.0 mL of water initially at 22.0 °C. The final temperature is 28.5 °C. Use these data to determine the specific heat of the metal. Use this result to identify the metal.

Answers

8000
!!!!!!!’!!!!!!!!!!!!!!!!!!!!!!!’

How many mL of isopropyl alcohol solution (40% v/v) would contain 2.5 mL of isopropyl alcohol? Report your answer in mL

Answers

Answer:

[tex]V_{solution}=6.25mL[/tex]

Explanation:

Hello there!

In this case, given the by-volume percent and the volume of isopropyl alcohol as the solute, we can compute the volume of the solution via:

[tex]\% v/v=\frac{V_{solute}}{V_{solution}} *100\%\\\\V_{solution}=\frac{V_{solute}}{\% v/v} *100\%[/tex]

Now, we plug in the given data to obtain:

[tex]V_{solution}=\frac{2.5mL}{40\%} *100\%\\\\V_{solution}=6.25mL[/tex]

Best regards!

Many power plants produce energy by burning carbon-based fuels, which also produces carbon dioxide. Carbon dioxide is a greenhouse gas, so over-production can have negative effects on the environment. Use enthalpy of formation data to calculate the number of moles of CO2(g) produced per megajoule of heat released from the combustion of each fuel under standard conditions (1 atm and 25 °C).

Answers

Answer:

2.54 molMJ-1

Explanation:

The formation of CO2 is according to the equation;

C(s) + O2(g) -------> CO2

ΔHreaction = ΔHCO2 - [ΔHO2 + ΔHC]

ΔHO2 and ΔHC = 0 KJ

ΔHCO2 = -393.5 KJ

Hence;

ΔHreaction = -393.5 KJ - 0 KJ

ΔHreaction = -393.5 KJ

1 mol of CO2 yields -393.5 KJ/mol

The negative sign only means that heat was evolved in the process.

nCO2 = 1 mol CO2/393.5 KJ * 1 * 10^3 KJ/1MJ

nCO2 = 2.54 molMJ-1

What is the total pressure of a mixture of gases, with 23 atm, 10 atm, 16 atm, and 30 atm?​

Answers

Total pressure is just the sum of partial pressures of all the gases: 23 + 10 + 16 + 30 = 79 atm

Help please

Lunar eclipses happen when the _____.

moon passes between the Earth and the sun
Earth passes between the sun and the moon
sun passes between the Earth and the moon

Answers

Answer:

mook passes between the earth and sun

Need help with chemistry!​

Answers

Answer:

c

Explanation:

I am not sure but this is the answer I can provide now

If you obtain 3.0 grams of aspirin from an experiment that could make no more than 3.14 grams, what is the percent yield?

87%
105%
96%
92%

Answers

Answer:

96%

Explanation:

To find the percent yield, we can use this equation

[tex]\frac{Actual}{Theoretical} *100[/tex]

The actual yield of aspirin is 3.0 and the theoretical is 3.14 in this case, so just plug the numbers in.

[tex]\frac{3.0}{3.14} *100\\\\ =96[/tex]

Thus the percent yield is 96%

;)

What happens to the water molecules when water at 24°C is cooled to 0°C
and freezes?

pls help its due tmr
giving brainliest

Answers

well if it were to freeze , the molecules move and become a solid slowly
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