Answer:
hope this helps
Explanation:
There are many types of fermentation that are distinguished by the end products formed from pyruvate or its derivatives. The two fermentations most commonly used by humans to produce commercial foods are ethanol fermentation (used in beer and bread) and lactic acid fermentation (used to flavor and preserve dairy and vegetables).
Post-Lecture Assignment Chapter 06
Animation-Changes of State
< 1 of 23 >
When a solid is placed in a container and heat is applied, a phase change occurs. Watch the video and sort the parts of the curve based on whether the average energy of the molecules is changing, or is constant.
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The liquid is heated at the boiling point
The solid is heated at the melting
point
The liquid is heated to reach the
boiling point
The solid is heated to reach the
melting point
Average molecule energy change
Average molecule energy constant
Submit
Answer:
Can you send an image of the question, please?
Explanation:
When gases are treated as real, via use of the van der Waals equation, the actual volume occupied by gas molecules ________ the pressure exerted and the attractive forces between gas molecules ________ the pressure exerted, as compared to an ideal gas.
decreases, increases
does not affect, decreases
increases, decreases
does not affect, increases
increases, increases
Answer:
Increases, decreases
Explanation:
Which bonds form in the reaction shown in the diagram? 2 2H, + 0 H-H O=0 H-H → 2H 0 H-0-H H-OH A. The bonds between the two hydrogen atoms and between the two oxygen atoms B. The bonds between the two hydrogen atoms C. The bonds between the oxygen and hydrogen atoms D. The bonds between the two oxygen atoms
The water molecule is formed by the covalent bonding between oxygen and hydrogen atoms. Therefore, option C is correct.
What is covalent bonding ?Covalent bonding is a type of chemical bonding that involves the sharing of electrons between two atoms. In covalent bonding, the two atoms share a pair of electrons to fill their outermost electron shell and form a stable molecule.
This type of bonding usually occurs between non-metal atoms, which have a high electronegativity and tend to attract electrons strongly. In a covalent bond, the shared electrons are attracted to the positively charged nuclei of both atoms, creating a strong bond.
The strength of the bond depends on the number of shared electrons and the distance between the nuclei. Covalent bonds can be either polar or nonpolar, depending on the electronegativity difference between the two atoms.
In water the bond is formed between oxygen atom and two hydrogen atoms. Hence, C is correct.
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_Na+ Cl2 - -> _NaCl
A 2,4
B 1,2
C 3,3
D 2,2
Answer:
D 2,2
Explanation:
We can see that there are 2 chlorines on the reactant side so there has to be a 2 on the product side
Now we have Na + Cl2 --> 2NaCl
The problem now is that there are 2 sodiums on the product side so add a 2 to the Na on the reactant side
2Na + Cl2 --> 2NaCl
Now it's balanced!
Which substance will form a solution when mixed with solid sodium chloride?
A. Cl2(g)
B. NaO2(s)
C. CCI4(I)
D. CH3OH(i)
Answer:
NaO2
Explanation:
Solutions are mixtures that are homogenous and comprise solutes and solvents. Methyl alcohol will react with solid sodium chloride to form a solution. Thus, option D is correct.
What are the solutions?The solutions are the mixtures of the solute and the solvent. The solute and the solvent are capable of forming a solution only if they both are either polar or nonpolar.
Here, chlorine is a gas, and sodium superoxide is a solid that cannot react with solid sodium chloride to make a solution and hence is eliminated. As sodium chloride is polar it cannot react with nonpolar carbon tetrachloride.
Methyl alcohol is polar and so is sodium chloride. They will react together as,
CH₃OH + NaCl → CH₃Cl + NaOH
Therefore, option D. CH₃OH will react to form a solution.
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The density of ethanol, C2H5OH, is 0.789 g/mL. How many milliliters of ethanol are needed to produce 18.2 g of CO2 according to the following chemical equation?
C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l)
Answer: 12.1 ml of ethanol is needed
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} CO_2=\frac{18.2g}{44g/mol}=0.414moles[/tex]
[tex]C_2H_5OH(l)+3O_2(g)\rightarrow 2CO_2(g)+3H_2O(l)[/tex]
According to stoichiometry :
2 moles of [tex]CO_2[/tex] is produced by = 1 mole of [tex]C_2H_5OH[/tex]
Thus 0.414 moles of [tex]CO_2[/tex] is produced by=[tex]\frac{1}{2}\times 0.414=0.207moles[/tex] of [tex]C_2H_5OH[/tex]
Mass of [tex]C_2H_5OH=moles\times {\text {Molar mass}}=0.207moles\times 46.07g/mol=9.54g[/tex]
Volume of ethanol = [tex]\frac{\text {Mass of ethanol}}{\text {density of ethanol}}=\frac{9.54g}{0.789g/ml}=12.1ml[/tex]
12.1 ml of ethanol is needed to produce 18.2 g of [tex]CO_2[/tex]
I just need my answers checked please be quick
Answer:
they are all right
Explanation:
A sample of nitrogen gas has a temperature of 22.7oC when the volume of the container is 12.2L and it is under 150.4kPa of pressure. What temperature, in Kelvin, would the gas need to be in order to occupy a 9.7L container at 101.3kPa? Show all your work and round your answer to the hundredths place.
Answer:
The final temperature of the gas would need to be approximately 158.4 K
Explanation:
The details of the sample of nitrogen gas are;
The initial temperature of the nitrogen gas, T₁ = 22.7°C = 295.85 K
The initial volume occupied by the gas, V₁ = 12.2 L
The initial pressure of the gas, P₁ = 150.4 kPa
The final volume of the gas, V₂ = 9.7 L
The final pressure of the gas, P₂ = 101.3 kPa
Let 'T₂', represent the final temperature of the gas, by the ideal gas equation, we have;
[tex]\dfrac{P_1 \times V_1}{T_1} = \dfrac{P_2 \times V_2}{T_2}[/tex]
[tex]\therefore \ T_2 = \dfrac{P_2 \times V_2 \times T_1 }{P_1 \times V_1}[/tex]
Plugging in the values gives;
[tex]\therefore \ T_2 = \dfrac{101.3 \, kPa \times 9.7 \ L \times 295.85 K}{150.4 \ kPa \times 12.2 \ L} \approx 158.4327959 \ K[/tex]
The final temperature of the gas, T₂ ≈ 158.4 K
Given the following chemical reaction equation:
3 Mg (s) + Al2O3 (s)------> 3 MgO (s) + 2 Al (s)
and 144g of MG and 150g of Al2O3 are reacted.
which chemical compound is the limiting reactant compound?
Answer:
Al₂O₃ is the limiting reactant
Explanation:
The limiting reagent or limiting reactant in a chemical reaction is a reactant that is totally used up when the chemical reaction is completed and subsequently, the reaction stops as no more products can be formed from the excess reactant.
Equation of the the reaction reaction is given below:
3 Mg (s) + Al₂O₃ (s) ----> 3 MgO (s) + 2 Al (s)
Mole ratio of reactants from the equation shows that 3 moles of magnesium metal is required to react with 1 mole of aluminum oxide.
Molar mass of magnesium metal, Mg = 24 g/mol
Molar mass of aluminum oxide, Al₂O₃ = (27 * 2 + 16 * 3) = 102 g/mol
from the equation of reaction, (24 * 3 g) 72 g of Mg reacts with 102 g of Al₂O₃
Given masses of reactants:
144 g of Mg = 144/24 6 moles of Mg
150 g of Al₂O₃ = 1.47 moles of Al₂O₃
Mole ratio of Mg to Al₂O₃ = 6/1.47 = 4.08 : 1
Therefore, magnesium is excess reactant while Al₂O₃ is the limiting reactant
Which yield comes from measurements obtained during a real experiment?
A) actual yield
B) theoretical yield
C) percent yield
Answer:
A) actual yield
Explanation:
Theoretical yield is the amount of product expected based on the stoichiomety.
Percent yield is the actual yield over the theoretical yield.
Give the theoretical yield, in moles, of CO2 from the reaction of 1.45 moles of C8H18 with 1.45 moles of O2.
2 C8H18 + 25 O2 → 16 CO2 + 18 H2O
Answer:
vuvbuvivovoivuighhghgig
When an ionic solid is added into a solvent, you can see that the ionic solid dissociates into its respective cations and anions. The solvent molecules immediately cluster around the ions. This is known as solvation. When the solvent is water, the solvation process is called hydration. Dissolution and hydration occur simultaneously, and salt is said to be dissolved in water. You can observe that some of the ions dissolved in the solution recrystallize or deposit to form the solid salt. When the rate of dissolution equals the rate of recrystallization (deposition), dynamic equilibrium is reached.
Rank from the first step to the last step.
a. hydration of anions
b. dissolution of salt into its cations and anions
c. hydration of cations
d. rate of dissolution is equal to the rate of deposition
e. hydrated cations and anions begin to deposit as a salt
Answer: See explanation
Explanation:
Based on the information given in the question, the ranking from the first step to the last step goes as follows:
1. Dissolution of salt into cations and anions
2. Hydration of anions
3. Hydration of cations
4. Dissolved cations and anions begin to deposit as a solid salt.
5. Rate of dissolution is equal to the rate of recrystallization.
3. Calculate the energy in joules) of a photon with a wavelength of 3.66 X 104 hm (Infrared region) (Hint: Use Planck's equation)
104.3 x 10")
104.3 x 10-21,
1.043 X 1033
5.43 x 10 21
Answer:
5.43×10¯³² J
Explanation:
From the question given above, the following data were obtained:
Wavelength (λ) = 3.66×10⁴ hm
Energy (E) =?
Next, we shall convert 3.66×10⁴ hm to metre (m). This can be obtained as follow:
1 hm = 100 m
Therefore,
3.66×10⁴ hm = 3.66×10⁴ hm × 100 m / 1 hm
3.66×10⁴ hm = 3.66×10⁶ m
Next, we shall determine the frequency of the frequency of the photon. This can be obtained as follow:
Wavelength (λ) = 3.66×10⁶ m
Velocity (v) = 3×10⁸ m/s
Frequency (f) =?
v = λf
3×10⁸ = 3.66×10⁶ × f
Divide both side by 3.66×10⁶
f = 3×10⁸ / 3.66×10⁶
f = 81.97 Hz
Finally, we shall determine the energy of the photon. This can be obtained as follow:
Frequency (f) = 81.97 Hz
Planck's constant (h) = 6.63×10¯³⁴ Js
Energy (E) =?
E = hf
E = 6.63×10¯³⁴ × 81.97
E = 5.43×10¯³² J
Therefore, the energy of the photon is 5.43×10¯³² J
(5) Discuss 5 Features of soft water
Explanation:
1. It is high in sodium
2. Has low percentage of hardness minerals such as magnesium and calcium.
Can y’all help me with this question
Answer:
owa owa
Explanation:
owa owa owa owa owa ow
1) 14.7 moles of Au react, how many grams of Au will that be?
2900 g Au
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 14.7 mol Au
[Solve] g Au
Step 2: Identify Conversion
[PT] Molar Mass of Au - 196.97 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 14.7 \ mol \ Au(\frac{196.97 \ g \ Au}{1 \ mol \ Au})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 2895.46 \ g \ Au[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
2895.46 g Au ≈ 2900 g Au
Benzoic acid is a white crystalline powder used as a food preservative the compound contains 68.8% carbon, 5.0% hydrogen and 26.2% oxygen by mass what is the empirical formula
Which of the following a true statement about igneous rocks?
A: Igneous rocks are only formed under a lot of heat and pressure. Some igneous rocks are formed below the surface others in oceans.
B: The properties of igneous rocks depend on the location in which they are formed.
C: Wind and water erosion can create igneous rocks.
Answer:
i think the answer is A....
Explanation:
Igneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface.
Meaning of chemistry
Answer:
Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
Explanation:
hope thats helps
What is 72.9 g HCI into moles
What volcano poses a threat on Sicily
Answer:
Mount Etna I believe
Explanation:
Phosphorous pentachloride decomposes according to the reaction
PCl5(g)=PCl3(g)+Cl2(g)
A 12.3 g sample of PCl5 is added to a sealed 1.50 L flask and the reaction is allowed to come to equilibrium at a constant temperature. At equilibrium, 31.8% of the PCl5 remains. What is the equilibrium constant, Kc, for the reaction?
Question is asking for Kc
Answer: The equilibrium constant, [tex]K_c[/tex], for the reaction is 0.061.
Explanation:
Initial concentration of [tex]PCl_5[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}\times Volume in L}}=\frac{12.3g}{208.2g/mol\times 1.50L}=0.039M[/tex]
Equilibrium concentration of [tex]PCl_5[/tex] = [tex]\frac{31.8}{100}\times 0.039=0.012M[/tex]
The given balanced equilibrium reaction is,
[tex]PCl_5(g)\rightleftharpoons PCl_3(g)+Cl_2(g)[/tex]
Initial conc. 0.039 M 0 M 0 M
At eqm. conc. (0.039-x) M (x) M (x) M
Given : (0.039-x) = 0.012
x = 0.027
The expression for equilibrium constant for this reaction will be,
[tex]K_c=\frac{[Cl_2]\times [PCl_3]}{[PCl_5]}[/tex]
Now put all the given values in this expression, we get :
[tex]K_c=\frac{0.027\times 0.027}{0.012}=0.061[/tex]
The equilibrium constant, [tex]K_c[/tex], for the reaction is 0.061.
Which of the following do omnivores eat?
A. only
B. plants and meat
C. meat only
D. they make their own food
Answer:
(B. Plants and meat)
Explanation:
Chemical formula of copper (II) nitrate
What is occurring with the velocity between points D and E?
A velocity is decreasing
B. velocity is increasing
C. velocity is constant
D. velocity is zero
Answer:
a
Explanation:
the line is going down
To determine the highest angle the pendulum will swing to after the impact, we can apply the principle of conservation of momentum. Initially, the total momentum is zero since the pendulum is at rest.
After the impact, the total momentum remains zero because the block and embedded projectile move together as a single system.First, let's convert the weight units to a common system. The 5-pound rod is approximately 2.27 kg, and the 10-pound wooden block is around 4.54 kg. The projectile's weight is 0.3 oz, which is about 0.0085 kg.The momentum before the impact is zero, so the momentum after the impact must also be zero. This can be expressed as:(2.27 kg + 4.54 kg + 0.0085 kg) * V_final = 0Solving for V_final gives us V_final ≈ 0 ft/s. Since the velocity is zero after the impact, the pendulum will momentarily stop at its highest point.Therefore, the highest angle the pendulum will swing to after the impact is 0 degrees, or it will come to rest at the vertical position.
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How many moles of F are in 8.25 grams of F?
0.434 mol F
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TablesMolesStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 8.25 g F
[Solve] moles F
Step 2: Identify Conversions
[PT] Molar Mass of F - 19.00 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 8.25 \ g \ F(\frac{1 \ mol \ F}{19.00 \ g \ F})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 0.434211 \ mol \ F[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
0.434211 mol F ≈ 0.434 mol F
Given the decomposition of hydrogen peroxide, calculate the moles of oxygen gas produced from 4.20 mol of H2O2.
2H2O2(l)→2H2O(l)+O2(g)
Answer:
2.10 moles of O₂
Explanation:
2 H₂O₂ (l) → 2H₂O(l) + O₂(g)
In this reaction we say, that 2 moles of hydrogen peroxide can decompose to 2 moles of water and 1 mol of oyxgen.
So ratio is 2:1, according to stoichiometry.
If we apply a rule of three;
2 moles of hydrogen peroxide can decompose to 1 mol of oxygen
Then 4.20 moles of hydrogen peroxide may produced (4.20 . 1)/2 =
2.10 moles of O₂
A car gets 23.7 miles per gallon of gasoline. A full tank of gasoline contains 75.0 liters. How many miles can this car travel on a full tank of gasoline show me step by step the formula
Answer:
Explanation:
3.79 liters in one gallon.
75.0 / 3.79 = 19.79 gallons of gasoline
19.8 x 23.7 = 469 miles per tank
The diameter of a red blood cell is about 3 × 10−4 in. What is its diameter in centimeters?
Answer:
1 in. =2.54 cm
3*(10^-4)*2.54=7.62*10^-4
Explanation:
List the number of each type of atom on the right side of the equation
MgS(aq)+2CuCl2(aq)→2CuS(s)+MgCl2(aq)
I get the left side correct, but not the right. Not sure what I am doing wrong.
Answer: 2 copper, 2 Sulfur, 1 Magnesium, 2 Chlorine.
Explanation:
Wasn't sure if this was what you were looking for, but thought if you got the left side that was all you needed?