Answer:
c. product
i had the test
Which chemical reaction is the slowest?
A. Cake rises as it cooks in the oven.
B. Drain cleaner fizzes up as it encounters blockages in a pipe.
C. Baking soda and vinegar react.
D. Milk turns sour.
WILL GIVE BRAINLIEST!!
Answer:
Milk turns sour
The chemical reaction or chemical change which is slowest is milk turning sour as it involves enzymatic actions which are slow reactions.
What is a chemical change?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical changes:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
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if the pH of a solution is 8.43, what is the [H+] concentration?
Answer: 3.7x10^-9
Explanation:
The reduced coenzymes generated by the citric acid cycle donate electrons in a series of reactions called the electron transport chain. The energy from the electron transport chain is used for oxidative phosphorylation. Which compounds donate electrons to the electron transport chain
Answer:
NADH and FADH2
Explanation:
The electron transport chain yields ATP, the energy driver for the body's metabolism by using atmospheric oxygen at the mitochondria.
The role of NADH and FADH2 (nicotinamide adenine dinucleotide (NAD) + hydrogen (H) and Flavin adenine dinucleotide) becomes so important as they are responsible for giving out electrons to the electron transport chain and that is a very crucial process for cellular respiration as adenosine triphosphate is produced. The hydrogen molecule in NADH and FADH2 are lost to the waiting oxygen molecule which now forms water.
Determine which base will work to deprotonate each compound in an acid/base extraction.
Benzene ring with a carboxylic acid on one carbon and a methyl ester group on the opposite carbon __________
Benzene ring with a three carbon chain attached to one carbon. At the other end of the three carbon chain is a hydroxyl group. ___________
Benzene ring with a hydroxyl group attached to one carbon and a tertbutyl group attached to the opposite carbon __________-
Answer:
A common method is to perform an acid-base reaction, which can ... acid is not particularly water-soluble due to its nonpolar aromatic ring, ... An acid-base extraction can be used to extract carboxylic acids from ... carbonic acid (H2CO3) can decompose to water and carbon dioxide gas.
Explanation:
The bases that will work to deprotonate the compounds are :
NaHCO₃ or NaOH.metal alkoxidesNaOHThe Benzene ring with carboxylic acid which is a weak acid can be deprotonated using NaOH or NaHCO₃ because of the weakness of the carboxylic acid.
Metal alkoxides like potassium tertiary butoxide can be used to deprotonate a Benzene ring with three carbon chain attached to a single carbon, and also containing a hydroxyl group is a very weak acid hence the use of Metal alkoxides.
Benzene ring with a hydroxyl group attached is also a weak acid just like the Benzene ring with carboxylic group hence it can also be deprotonated using NaOH
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Consider the balanced equation below.
4NH3 + 3O2 Right arrow. 2N2 + 6H2O
What is the mole ratio of NH3 to N2?
2:4
4:2
4:4
7:2
Answer:
b...4:2
Explanation:
Answer:
B on edge
Explanation:
1.23 x 104 L = ? m3
Complete the conversions above. Please show your work and include units in your final answer.
Please I need it ASAP
Answer:
1.23 x 104 L = 0.12792 m3
Explanation:
!!!!!!!!!!
In order to have an eclipse,the moon,sun and earth have to be?
A. Below each other
B. Above each other
C. In alignment
Explanation:
When the Moon passes between Sun and Earth, the lunar shadow is seen as a solar eclipse on Earth. When Earth passes directly between Sun and Moon, its shadow creates a lunar eclipse. ... But lunar eclipses do not occur every month because the Moon's orbit is tilted five degrees from Earth's orbit around the Sun.
List and explain each of the signs of a chemical change.
Acts as the digestive system inside a cell. It helps to break down old or unneeded parts of the cell, and substances that have been brought into the cell from the outside. WHO I AM?
Answer:
I think it is enzymes
Explanation:
Match the object with its characteristic.
Earth
?
Electromagnet
Venus
?
Permanent magnet
Refrigerator
magnet
?
Not magnetic
Answer:
Earth is electromagnet
Refrigerator is permanent magnet
Venus is not
Explanation:
-. How many moles of Pb are contained in 2.49 x 1025 atoms Pb?
Answer: There are [tex]4.13 \times 10^{-3}[/tex] moles of Pb are contained in [tex]2.49 \times 10^{25}[/tex] atoms Pb.
Explanation:
According to the mole concept, 1 mole of every substance contains [tex]6.023 \times 10^{23}[/tex] atoms.
Hence, number of moles present in [tex]2.49 \times 10^{25}[/tex] atoms of Pb are as follows.
[tex]No. of moles = \frac{2.49 \times 10^{25}}{6.023 \times 10^{23}}\\= 4.13 \times 10^{-3} mol[/tex]
Thus, we can conclude that there are [tex]4.13 \times 10^{-3}[/tex] moles of Pb are contained in [tex]2.49 \times 10^{25}[/tex] atoms Pb.
In the area with a large population of valuable ocean organisms is called a(n)
Answer:
fishery
An area with a large population of valuable ocean organisms is called a fishery. If it was correct mark me as brainiest
How many moles of ammonia would be required to react exactly with 0.554 moles of copper(II) oxide in the following in chemical reaction? 2 NH3(g) + 3 CuO(s)= 3Cu(s) + N2(g) + 3 H2O(g)
What is the MOST LIKELY reason that they build these layers? A. Help them capture food because their calcium carbonate exterior keeps them from drying out in their specific environment. B. Help them capture food because their calcium carbonate exterior allows them to withstand an attack from their predators in their specific environment. C. Protect them from predators because their calcium carbonate exterior allows them to withstand an attack from their predators in their specific environment. D. Protect them from predators because their calcium carbonate exterior keeps them from drying out in their specific environment.
Answer:
C. Protect them from predators because their calcium carbonate exterior allows them to withstand an attack from their predators in their specific environment.
Explanation:
They build layers to protect themselves from predators. Plus, I've seen this question and got it right.
A substance with a lower specific heat capacity would:
1. Heat up faster and cool down slower
2. Heat up faster and cool down faster
3. Heat up slower and cool down faster
4. Heat up slower and cool down slower
Answer:
i think 2
Explanation:
i only think 2 i only think
Select the keyword or phrase that will best complete each sentence. A Claisen reaction is a nucleophilic ____________ in which an enolate is the nucleophile.
Answer:
Substitution.
Explanation:
Claisen reaction was first published in 1887 by a prominent German chemist known as Rainer Ludwig Claisen.
A Claisen reaction is a nucleophilic substitution in which an enolate is the nucleophile. It's typically a reaction of two molecules of an ester to form a β-keto ester, in the presence of an alkoxide base. Thus, a Claisen reaction is simply a characteristic condensation reaction of esters through a nucleophilic carbonyl substitution with an enolate such as a ketone enolate or an ester enolate.
Furthermore, a Claisen reaction results in the formation of a carbon-carbon bond in the presence of a strong base to yield a β-keto ester.
What eventually happens to gas if its pressureis increased?
Answer:
the rate increases
Explanation:
they are closer to each other, they will collide with each other more frequently and more successful collision
What types of foundations are not good when building in an area that is likely to experience earthquakes?
soft clay
wet and sandy soil
hard clay
bedrock
Answer:
Wet and sandy soil as it does not provide a sturdy structure
Atmospheric pressure decreases as altitude increases. In other words, there is more air pushing down on you at sea level, and there is less air pressure pushing down on you when you are on a mountain.If pentane (C5H12), hexane (C6H14), and hexanol (C6H13OH) are heated evenly at different altitudes.
Required:
Rank them according to the order in which you would expect them to begin boiling.
Answer:
Pentane » Hexane » Hexanol
Explanation:
Pentane and Hexane are simple molecular structured with discrete molecules having weak vanderwaals forces of attraction. But Hexane has high molecular mass than pentane hence pentane has lower boiling point than Hexane.
Hexanol has hydrogen bonds between highly electronegative oxygen atom and the hydrogen atom which break on high heat energy application hence it has high boiling point.
In butter, [H3O+] =6.0x10-7 M, what is the pH? Is butter acidic, basic, or neutral?
Answer:
Label each solution as acidic, basic, or neutral based only on the stated pH.
milk of magnesia, pH = 10.5
pure water, pH = 7
wine, pH = 3.0
Solution
With a pH greater than 7, milk of magnesia is basic. (Milk of magnesia is largely Mg(OH)2.)
Pure water, with a pH of 7, is neutral.
With a pH of less than 7, wine is acidic.
Estimate the salt-to-water mass ratio that would produce the necessary change in temperature (i.e., 22-25°C.) Use the mass of salt calculated in the previous question and the water-to-salt ratio to determine the volume of water needed.
Answer:
Sea water salinity is expressed as a ratio of salt (in grams) to liter of water. In sea water there is typically close to 35 grams of dissolved salts in each liter. It is written as 35‰. The normal range of ocean salinity ranges between 33-37 grams per liter (33‰ - 37‰).
A mole of a substance has a mass in grams that is equal to the molecular mass. For example, a carbon atom has a mass of 12.01 u. A mole of carbon has a mass of 12.01 g. Based on their molecular masses, list the molar massof each substance:Fe2O3__________CO __________Fe __________CO2__________ slader
Answer:
M(Fe₂O₃) = 159.70 g/mol
M(CO) = 28.01 g/mol
M(Fe) = 55.85 g/mol
M(CO₂) = 44.01 g/mol
Explanation:
We can calculate the molar mass of a compound by summing the molar masses of the elements that form it.
Fe₂O₃
M(Fe₂O₃) = 2 × M(Fe) + 3 × M(O) = 2 × 55.85 g/mol + 3 × 16.00 g/mol = 159.70 g/mol
CO
M(CO) = 1 × M(C) + 1 × M(O) = 1 × 12.01 g/mol + 1 × 16.00 g/mol = 28.01 g/mol
Fe
M(Fe) = 1 × M(Fe) = 1 × 55.85 g/mol = 55.85 g/mol
CO₂
M(CO₂) = 1 × M(C) + 2 × M(O) = 1 × 12.01 g/mol + 2 × 16.00 g/mol = 44.01 g/mol
How much heat energy is required to boil 66.7 g of ammonia, NH3? The molar heat of vaporization of ammonia is 23.4 kJ/mol.
Answer:
91.7 kJ
Explanation:
Step 1: Given data
Mass of ammonia (m): 66.7 gMolar heat of vaporization of ammonia (ΔH°vap): 23.4 kJ/molStep 2: Calculate the moles (n) corresponding to 66.7 g of ammonia
The molar mass of ammonia is 17.03 g/mol.
66.7 g × 1 mol/17.03 g = 3.92 mol
Step 3: Calculate the heat (Q) required to boil 3.92 moles of ammonia
We will use the following expression.
Q = ΔH°vap × n
Q = 23.4 kJ/mol × 3.92 mol = 91.7 kJ
How many liters of C3H6O are present in a sample weighing 25.6 grams?
To Find :
Number of moles of C₃H₆O present in a sample weighing 25.6 grams.
Solution :
Molecular mass of C₃H₆O is :
M = (6×12) + (6×1) + (16×1) grams
M = 94 grams/mol
We know, number of moles of 25.6 grams of C₃H₆O is :
[tex]n = \dfrac{Given \ Mass \ Of \ C_3H_6O }{Molar\ Mass \ Of \ C_3H_6O }\\\\n = \dfrac{25.6}{94}\ mole\\\\n = 0.27 \ mole[/tex]
Hence, this is the required solution.
3. A metal tank contains three gases: oxygen, helium, and nitrogen. If the partial pressures of the three
gases in the tank are 35.0 atm of O2, 5.0 atm of N, and 25.0 atm of He, what is the total pressure
inside of the tank?
Answer:
35.0 atm + 5.0 atm + 25.0 atm = 65 atm
Explanation:
Partial pressure + Partial pressure + Partial pressure = Total pressure
The concept Dalton's law of partial pressures is used here to determine the total pressure of the gas. The total pressure of the gas is the sum of partial pressures of the gas. Here the total pressure is 65 atm.
What is Dalton's law of partial pressure?The pressure exerted by a mixture of two or more non-reacting gases enclosed in a definite volume is equal to the sum of the partial pressures of the component gases.
The partial pressure of a component gas in a mixture is the pressure that gas would exert if present alone in the vessel at the same temperature as that of the mixture.
Let p₁, p₂, p₃, etc. are the partial pressures. Then the total pressure is given as:
P = p₁ + p₂ + p₃
P = 35.0 + 5.0 + 25.0
P = 65 atm
Thus the total pressure is 65 atm.
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Observe the above circuit diagram, if the gap is filled with a plastic wire, will the bulb glow? Justify your answer
Answer:
YES THE BULB WILL GLOW.
Explanation:
BECAUSE THE CIRCUIT UPPER AREA IS MADE OF PLASTIC SO THE PLASTIC CONDUCTS THE ELECTRICITY SO THE BULB WILL GLOW.
3
Humans use energy from several different sources.
What evidence from the passage supports this statement?
dying
use
Iuch of
6. These
ecess, as
you.
A People use energy to play, study, eat, make basketballs,
and generate electricity
B People use energy from natural gas of coal the sun
wind and water
Wind turbines can affect bis bars and other wilde
derstand
Show your work. 37.2 moles CO2 to oxygen atoms.
what is the molarity of a solution of sodium hydroxide if it 15.0 mL requires 25.0 ml of 0.25M HCl to reach the end point
Answer:
0.42 M
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
HCl + NaOH —> NaCl + H₂O
From the balanced equation above,
The mole ratio of acid, HCl (nₐ) = 1
The mole ratio of base, NaOH (n₆) = 1
Finally, we shall determine the molarity of the base, NaOH. This can be obtained as follow:
Volume of acid, HCl (Vₐ) = 25 mL
Molarity of acid, HCl (Mₐ) = 0.25 M
Volume of base, NaOH (V₆) = 15 mL
Molarity of base, NaOH (M₆) =?
MₐVₐ / M₆V₆ = nₐ/n₆
0.25 × 25 / M₆ × 15 = 1
6.25 / M₆ × 15 = 1
Cross multiply
6.25 = M₆ × 15
Divide both side by 15
M₆ = 6.25 / 15
M₆ = 0.42 M
Therefore, the molarity of the base, NaOH is 0.42 M
True or False: Both molecules and compounds are pure substances.
Answer:
False
Explanation:
Hope this helps!
Answer:
True
Explanation:
It's because both compounds and elements are considered pure substances and a molecules is considered an element.