Answer:
Independent: The amount of vinegar
Dependent: The dye result on the egg
Controlled: The type of eggs, the size of jars, the dye tablet, how much she stirs, etc.
Explanation:
The independent variable is what is being changed, which in this case, is the amount of vinegar being added to each jar. The dependent variable is what is being measured or observed. Kesha is looking for what happens to the egg when she adds more vinegar with the dye. Lastly, there could be a couple of controlled variables. Like, the dye tablet, the size and brand of the eggs, the types of jars, how long she stirs each egg, and so on. The controlled are just variables kept constant so that any result observed is because of one singular change, the independent variable.
A company known as arten industries is wanting to build a factory in the watershed that is pictured
If the limiting reactant in a chemical reaction is impure, what will happen to the percentage yield of the product?
Answer:
it may also become impure,I think.
What is the molecule shown below?
A. 2,3-methylpentane
B. 3-propylbutane
C. Heptane
D. 2-butylpropane
Answer:
2,3–dimethylpentane
Explanation:
To know which option is correct, we shall determine the name of the compound.
To obtain the name of the compound, do the following:
1. Determine the longest continuous carbon chain. This gives the parent name of the compound.
2. Identify the substituent group attached to the compound.
3. Locate the position of the substituent group by giving it the lowest possible count.
4. Combine the above to obtain the name of the compound.
Now, we shall determine the name of the compound as follow:
1. The longest continuous carbon chain is 5. Thus, the parent name of the compound is pentane.
2. The substituent group attached is methyl (–CH₃)
3. There are two methyl group attached to the compound. One is located at carbon 2 and the other at carbon 3.
4. Therefore, the name of the compound is:
2,3–dimethylpentane
None of the options are correct.
write an equation for hydrogen sulphide in aqueous solution
Answer:
This is hard because I don’t know the answer
Explanation:
I just need points
Is 1 mole of Na equal or not equal to Avogadro's number?
Answer:
nooooo it is not equal to it
Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Determine the
percent yield when 3.78 g of ammonium sulfate forms from the reaction of 2.51 g of sulfur
trioxide, 1.55 g of ammonia, and 0.804 g of water.
Answer:
Explanation:
Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Determine the percent yield when 3.78 g of ammonium sulfate forms from the reaction of 2.51 g of sulfur trioxide, 1.55 g of ammonia, and 0.804 g of water. Can you please show step by step on how you got the answer thanks!
-
First, the balanced equation:
1 SO3 + 2 NH3 + 1 H2O --> 1 (NH4)2SO4
Find the limiting reactant using molar masses and mole ratios
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) = 0.03135 mol (NH4)2SO4
1.55 g NH3 (1 mol NH3 / 17.04 g NH3) (1 mol (NH4)2SO4 / 2 mol NH3) = 0.04548 mol (NH4)2SO4
0.804 g H2O (1 mol H2O / 18.02 g H2O) (1 mol (NH4)2SO4 / 1 mol H2O) = 0.04462 mol (NH4)2SO4
Therefore, the limiting reactant is sulfur trioxide.
Now find the theoretical yield of (NH4)2SO4.
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) (132.16 g (NH4)2SO3 / 1 mol (NH4)2SO4) = 4.14 g (NH4)2SO4
Actual yield / Theoretical yield x 100% = Percent yield.
Therefore, percent yield = 91.3%
hoppe it helps
Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Hence,the percent yield is 91.3%.
What is percent yield ?
The percentage yield displays the amount of product produced in relation to the maximum mass. The proportion of atoms in the reactants that go on to produce the intended product is determined by the reaction's atom economy.
The balanced chemical equation is as follows:
1 SO3 + 2 NH3 + 1 H2O ⇒ 1 (NH4)2SO4
Find the limiting reactant by using molar masses and mole ratios as follows:
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3)
= 0.03135 mol (NH4)2SO4
1.55 g NH3 (1 mol NH3 / 17.04 g NH3) (1 mol (NH4)2SO4 / 2 mol NH3)
= 0.04548 mol (NH4)2SO4
0.804 g H2O (1 mol H2O / 18.02 g H2O) (1 mol (NH4)2SO4 / 1 mol H2O)
= 0.04462 mol (NH4)2SO4
Hence, the limiting reactant is sulfur trioxide.
Then, find the theoretical yield of (NH4)2SO4.
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) (132.16 g (NH4)2SO3 / 1 mol (NH4)2SO4)
= 4.14 g (NH4)2SO4
Actual yield / Theoretical yield x 100% = Percent yield.
percent yield = 91.3%
Thus, the percent yield is 91.3%.
To learn more about the percent yield, follow the link;
https://brainly.com/question/17042787
#SPJ2
HELP ME WITH ONE OR BOTH OF THESE QUEATIONS PLEASEEEE
Answer:
2. 181.25 K.
3. 0.04 atm.
Explanation:
2. Determination of the temperature.
Number of mole (n) = 2.1 moles
Pressure (P) = 1.25 atm
Volume (V) = 25 L
Gas constant (R) = 0.0821 atm.L/Kmol
Temperature (T) =?
The temperature can be obtained by using the ideal gas equation as illustrated below:
PV = nRT
1.25 × 25 = 2.1 × 0.0821 × T
31.25 = 0.17241 × T
Divide both side by 0.17241
T = 31.25 / 0.17241
T = 181.25 K
Thus, the temperature is 181.25 K.
3. Determination of the pressure.
Number of mole (n) = 10 moles
Volume (V) = 5000 L
Temperature (T) = –10 °C = –10 °C + 273 = 263 K
Gas constant (R) = 0.0821 atm.L/Kmol
Pressure (P) =?
The pressure can be obtained by using the ideal gas equation as illustrated below:
PV = nRT
P × 5000 = 10 × 0.0821 × 263
P × 5000 = 215.923
Divide both side by 5000
P = 215.923 / 5000
P = 0.04 atm
Thus, the pressure is 0.04 atm
Which is the function of protein macromolecule?
How have organisms changed over time, according to the fossil record?
Answer:
As the world changes, plants and animals change with it. Aside from a few living fossils, the species we see today are very different from species that lived in the past. Thus, the fossil record can be used to show that organisms changed to meet new conditions. This is the result of evolution of species over time.
hope this helps
have a good day :)
Explanation:
This chemical reaction follows the law of conservation of mass. CaO(s) + CO2(g) - CaCO3(s) How much CaCO, will be formed if 2.2 grams of CaO are used for this reaction? Assume there are enough reactants to complete the reaction. The final answer should be rounded to one place after the decimal point.
4.3 grams 2.2 grams 1.1 grams 3.9 grams
please answer quick!
Answer:
the answer is 1.1grams is the currect ans
According to the law of conservation of mass, 1.1 grams of calcium carbonate are formed if 2.2 grams of CaO are used for this reaction.
What is law of conservation of mass?According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.If 56 g CaO gives 46.2 g calcium carbonate then 2.2 g CaO will give 2.2×46.2/56=1.1 g.
Learn more about law of conservation of mass, here:
https://brainly.com/question/28711001
#SPJ6
1. Determinati masa moleculara, raportul atomic si raportul de masa pentru oxidul de aluminiu 2. Determinati compozutia procebtuala al hidroxidului de sofiu sau sofa cauxica, 3. Determinati ce cantitate calciu este cuprinds in 112 grame oxid de calciu 4. Determinati ce cantiate de sulf in 490 de grame de acid sulfuric
Answer:
im solving now
Explanation:
What is the highest level of complexity for a single celled organism?
Answer:
Amoeba since it can come together as a multicellular with other amoebas, but still act as one giant living cell.
Explanation: i read in a book that red-slime molds can do that. hope it wasn't too far too late recent.
I need the answer fast plzzz!! NO LINKS
Answer:
your answer is 12 hope it's correct answer
how many moles of KCIO3 are required to produce 58.3 grams of 02?
2 KCIO3 —> 2 KCI + 3 O2
Answer:
1.21 mol KClO₃
General Formulas and Concepts:
Atomic Structure
Reading a Periodic TableMolesMole RatioStoichiometry
Analyzing reactions rxnUsing Dimensional AnalysisExplanation:
Step 1: Define
Identify variables
[rxn] 2KClO₃ → 2KCl + 3O₂
[Given] 58.3 g O₂
[Solve] mol KClO₃
Step 2: Identify Conversions
[rxn] 2 mol KClO₃ → 3 mol O₂
[PT] Molar Mass of O: 16.00 g/mol
Molar Mass of O₂: 2(16.00) = 32.00 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 58.3 \ g \ O_2(\frac{1 \ mol \ O_2}{32.00 \ g \ O_2})(\frac{2 \ mol \ KClO_3}{3 \ mol \ O_2})[/tex][DA] Divide/Multiply [Cancel out units]: [tex]\displaystyle 1.21458 \ mol \ KClO_3[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
1.21458 mol KClO₃ ≈ 1.21 mol KClO₃
How many hydrogen atoms are found in the
hydrate (NH4)3PO4.5H2O?
Answer:
22
Explanation:
3x4+ 5x2
The product of 2 × 104 cm and 4 × 10–12 cm, expressed in scientific notation is ____.
a.
8 × 10–7 cm
b.
6 × 10–8 cm
c.
8 × 10–8 cm
d.
8 × 10–48 cm
Answer:
b,,
Explanation:
What is the energy transformation from wind to usable energy
Answer:
A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion.
Explanation:
A stock solution of calcium sulfate, CaSO4 has a concentration of 3.00 M. The volume of this solution is 150 mL. What volume of a 1.25 M solution could be made from the stock solution?
Answer: The volume of stock solution needed is 62.5 mL
Explanation:
A solution consists of solute and solvent. A solute is defined as the component that is present in a smaller proportion while the solvent is defined as the component that is present in a larger proportion.
To calculate the volume of stock solution needed, the formula used is:
[tex]C_1V_1=C_2V_2[/tex] ....(1)
where,
[tex]C_1\text{ and }V_1[/tex] are the concentration and volume of stock solution.
[tex]C_2\text{ and }V_2[/tex] are the concentration and volume of diluted solution.
We are given:
[tex]C_1=3.00M\\V_1=?mL\\C_2=1.25M\\V_2=150mL[/tex]
Putting values in equation 1, we get:
[tex]3.00\times V_1=1.25\times 150\\\\V_1=\frac{1.25\times 150}{3.00}\\\\V_1=62.5mL[/tex]
Hence, the volume of stock solution needed is 62.5 mL
PLEASE HELP. requires 35 mL of NaOH(aq) to neutralize
10. mL of 0.10 M HCl(aq). The concentration of the NaOH(aq) is
Answer:
0.0286M
Explanation:
Using the formula as follows:
CaVa = CbVb
Where;
Ca = concentration of HCl acid (M)
Cb = concentration of NaOH base (M)
Va = volume of HCl acid (mL)
Vb = volume of NaOH base (mL)
According to the information provided in this question;
Ca = 0.10 M
Cb = ?
Va = 10mL
Vb = 35mL
Using CaVa = CbVb
Cb = CaVa/Vb
Cb = (0.10 × 10) ÷ 35
Cb = 1 ÷ 35
Cb = 0.0286M
An experiment was conducted and students observed that a solution had a hydroxide concentration of 7.0 x 10-2 .What is the pH? is the substance acidic or basic?
Answer:
The pH of the solution is basic
Explanation:
as one of the characteristics of the base is to increase the OH concentration in a solution so if the solution has low concentration of OH this means that the solution is basic
the enthalpy change of reaction is also called
a) heat of the environment
b) heat of enthalpy
c) heat of the reaction
d) enthalpy of heat
Describe the redox reaction Check all that apply
2Al(s) + 3ZnCl2(g) - 3Zn(s) + 2AlCl3(aq)
Aluminum atoms transfer electrons to chlorine atoms.
Zinc is reduced
Zinc is the reducing agent
The oxidation number of chlorine does not change,
Aluminum is oxidized
Answer:
Zinc is reduced, The oxidation number of chlorine does not change, and Aluminum is oxidized.
Explanation:
Classify the type of reaction between aluminum solid and oxygen gas.
Why do nurses need to understand chemistry?
A. Chemistry helps them understand how germs transmit disease.
B. Chemistry helps them keep accurate health records.
C. Chemistry helps them understand how medicines work.
D. Chemistry helps them learn the parts of the body.
Option D. Chemistry helps them learn the parts of the body is the reason need to understand chemistry.
Why do nurses need to understand chemistry?
Chemistry exists as the branch of science that contracts with the properties, composition, and arrangement of elements and compounds, how they can vary, and the energy that exists released or absorbed when they change.
Nurses must utilize organic chemistry to determine how the bodies of their patients metabolized glucose, and how the body responds to it. On a more complex level, nurses must cause conclusions based on their knowledge of organic chemistry to help protect the lives of their patients.
Hence, Option D. Chemistry helps them learn the parts of the body is the reason need to understand chemistry.
To learn more about Uses of organic chemistry refer to:
https://brainly.com/question/24175552
#SPJ2
What are 1A, 3B, and 7A examples of on the periodic table?
groups.
numbers
periods
O rows
Answer: Groups
Explanation:
I took the quiz
answer 3 & 4
Which of the following answer describes 2-hexene? *
O structure should have 5 carbon with double bond beginning on the 2nd carbon atom
O structure should have 6 carbon with triple bond beginning on the 2nd carbon atom
O structure should have 6 carbon with double bond beginning on the 2nd carbon atom
O structure should have 5 carbon with triple bond beginning on the 2nd carbon atom
Answer:
The answer for 2-hexene is that the structure should have 6 carbon with a double bond beginning on the 2nd carbon atom.
The answer for 1-pentyne is that the structure should have 5 carbon with triple bond beginning on the 1st carbon atom.
Explanation:
2-Hexene
The structural formula for 2-hexene will have 6 carbons because the nomenclature has a -hex prefix, which stands for 6 carbons.
The -ene suffix of the nomenclature means that the organic compound is an alkene. Alkenes are hydrocarbons that contain double covalent bond and have the suffix -ene.
The double bond is on the 2 carbon atom because the nomenclature states that the double bond will be on the 2 carbon atom.
1-Pentyne
The structure will have 5 carbons since the -pent prefix means 5 carbons.
The structure has a triple bond because the -yne suffix means that the structure is an alkyne. An alkyne is a hydrocarbon with triple covalent bonds.
Also, the position of the triple bond is known because the nomenclature of the alkyne states that the triple bond is on the 1st carbon.
A tank with a volume of 658 mL contains 1.50 g of neon gas. The maximum safe pressure that
the tank can withstand is 450 kPa. At what temperature will the tank have that pressure
Answer:
206°C
Explanation:
To solve this question we must use the combined gas law:
PV = nRT
Where P is pressure in atm, V is volume in liters, T absolute temperature, n are moles of gas, and R gas constant.
Pressure:
450kPa * (1atm / 101.325kPa) = 4.441atm
Volume:
658mL = 0.658L
Moles -Molar mass Ne: 20.1797g/mol-
1.50g * (1mol / 20.1797g) = 0.07433 moles
R: 0.082atmL/molK
Replacing to solve T:
T = PV/nR = 4.441atm*0.658L / 0.07433 moles*0.082atmL/molK =
T = 479K
In °C:
479K -273 =
206°CSituation 1
Mass number = 35
No. of protons = 17
Net charge = -1
3.What is the atomic number?
(1 Point)
Enter your answer
4.How many neutrons are there?
(1 Point)
Enter your answer
5.How many electrons are there?
(1 Point)
Enter your answer
6.What type of atom is it?Immersive Reader
(1 Point)
neutral
cation
anion
Situation 2
Number of protons = 35
Number of neutrons = 46
Net charge = -1
7.What is its atomic number?
(1 Point)
Enter your answer
8.What is its mass number?
(1 Point)
Enter your answer
9.How many electrons are there?
(1 Point)
Enter your answer
10.What type of atom is it?Immersive Reader
(1 Point)
neutral
cation
anion
Situation 3
Atomic number = 37
Mass number = 85
Number of electrons = 36
11.How many protons are there?
(1 Point)
Enter your answer
12.How many neutrons are there?
(1 Point)
Enter your answer
13.What is its net charge?
(1 Point)
Enter your answer
14.What type of atom is it?Immersive Reader
(1 Point)
neutral
cation
anion
Situation 4
Mass number = 11
Number of neutrons = 6
Net charge = +3
15.What is its atomic number?
(1 Point)
Enter your answer
16.How many protons are there?
(1 Point)
Enter your answer
17.How many electrons are there?
(1 Point)
Enter your answer
18.What type of atom is it?Immersive Reader
(1 Point)
neutral
cation
anion
Answer:
3. 17
4. 18
5. 10
6. Cation
7. 35
8. 81
9. 36
10. Anion
11. 37
12. 48
13. +1
14. Cation
15. 5
16. 5
17. 2
18. Cation
Explanation:
Situation 1
The mass number = 35 = The sum of the protons and the neutrons in an atom
The number of protons = 17
The net charge = 1
3. The atomic number = The number of proton = 17
4. The number of neutrons = Mass number - Atomic number
∴ The number of neutrons = 35 - 17 = 18
5. Given that the net charge of the atom = +1, the number of electrons in the atom is 1 less than the number of protons
Therefore, the number of electrons = 11 - 1 = 10
6. Positively charged ions are called a cation
The atom is a positively charged and it is therefore it is a cation
Situation 2
The number of protons = 35
The number of neutrons = 46
The net charge = -1
7. The atomic number = The number of protons = 35
8. The mass number = The number of protons + The number of neutrons
∴ The mass number = 35 + 46 = 81
9. The number of electrons = The number of protons + 1
∴ The number of electrons = 35 + 1 = 36
10. The type of atom is an anion
Situation 3
Atomic number = 37
Mass number = 85
Number of electrons = 36
11. The number of protons = The atomic number = 37
12. The number of neutrons = The mass number - The atomic number
∴ The number of neutrons = 85 - 37 = 48
13. The net charge = The atomic number - The number of electrons
∴ The net charge = 37 - 36 = +1
14. Given that the net charge = +1, the type of atom is a cation
Situation 4
Mass number = 11
Number of neutrons = 6
Net charge = +3
15. The atomic number = The mass number - The number of neutrons
∴ The atomic number = 11 - 6 = 5
16. The number of protons = The atomic number = 5
17. Given that the net charge is +3, we have;
The number of electrons = The number of protons - The net charge
∴ The number of electrons = 5 - (+3) = 2
18. The type of atom with a net positive charge (+3) is a cation
The Ideal Gas Law is as follows: PV = nRT.
Rearrange the equation for each variable.
P =
V=
n =
R=
T =
Answer:
p=nRT/V
v=nRT/P
n=PV/RT
t=PV/nR
When choosing a respirator for your job, you must conduct a _____ test.
A) Weight
B) Breathing
C) Fit
D) Practice