Answer:
the solution is acidic as its ph has already exceeded the neutral level
[tex]1.1 X 10^-9 M[/tex] is the [H] in a solution with a pH of 9.92.
What is pH?pH is the quantitative measure of the acidity or basicity of aqueous or other liquid solutions.
The pH of a solution is usually found by the following expression:
pH=-log [[tex]H^+[/tex]]
Therefore, to find the concentration of [tex]H^+[/tex] we can rearrange this expression and thus,
= [[tex]H^+[/tex]] = [tex]10^-^{pH}[/tex]
= [[tex]H^+[/tex]] = [tex]10^-^{9.92}[/tex]
=[tex]1.1 X 10^-9 M[/tex]
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Se disuelven 10 g de acido carbónico H2CO3 en 150 g de agua. Determina la concentración % m/m de esa disolución?
The question is: 10 g of carbonic acid H2CO3 are dissolved in 150 g of water. Determine the% m / m concentration of that solution?
Answer: The% m / m concentration of that solution is 6.66%.
Explanation:
Given: Mass of solute = 10 g
Mass of solvent = 150 g
Formula used to calculate the %m/m is as follows.
[tex]Percent (m/m) = \frac{mass of solute}{mass of solvent} \times 100[/tex]
Substitute the values into above formula as follows.
[tex]Percent (m/m) = \frac{mass of solute}{mass of solvent} \times 100\\= \frac{10 g}{150 g} \times 100\\= 6.66%[/tex]
Thus, we can conclude that the% m / m concentration of that solution is 6.66%.
A bowling ball is let go from a height of 30 cm. What is the velocity of the
ball just before it hits the ground?
Select one:
о
0.30 m/s.
О
17 m/s.
O
24 m/s
a
1.3 m/s
Answer:
The answer is 0.30 m/s
Explanation:
i search it on
Which substance is a type of biomolecule that can be used for energy storage and insulation? O A. Nucleic acid O B. Carbon dioxide O C. Lipid D. Protein
Answer:
Protein
Explanation:
Protein is used to make insulation (like fat) and is used to store energy taken form food (please tell me if this works)
Protein which is made up of amino acids is a type of biomolecule that can be used for energy storage and insulation.
What are amino acids?Amino acids are defined as the substances which are considered to be the monomers of proteins.Every amino acid has the same structure consisting of a central carbon which is bonded to an amino group , carboxyl group and a hydrogen.
Each amino acid also has another atom or a group of atoms bonded to the alpha carbon which are also known as the R group or the variable group of the side chain.There are 20 common amino acids present in natural proteins and each amino acid has the same backbone.
The sequence and number of amino acids determines protein's shape,size and also its function. Each amino acid is attached to the other by a covalent bond formed by a dehydration reaction.
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CH4 + 2O2=CO2+2H2O. how many moles of O2 will be needed to produce 5.0 moles of CO2 from the correctly balanced reaction?
Answer:
10 moles of O2
Explanation:
Balanced Equation:
CH4 + 2O2=CO2+2H2O
Now,
According to Stoichiometry,
In the reaction,
1 mole CO2 is produced by 2 moles of O2
∴5 moles of CO2 is produced by (2 X 5) moles of O2
= 10 moles of O2
Therefore, to produce 5 moles of CO2, 10 moles of Oxygen is needed.
A certain sample of gas wieghing 22.8g contains 6.22g of carbon and an unweighed quantity of oxygen. What is the percentage composition of this gas
Answer:
16.58
Explanation:
22.80
-
6.22
_____
16.58
law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed. Therefore, the quantity of mass is conserved over time.
I hope that helps
does anyone know if these are correct? if not can anyone tell me what the answers are?
Answer:
16. correct
17. correct
18. correct
19. correct
Newton's first law of motion states that an object in motion tends to stay in motion unless it
Answer:
unless it is acted upon a forcd
Si 4 L de un gas están a 0,79 atm de presión, ¿Cuál será su nuevo volumen, si aumentamos la presión hasta 1,05 atm?
Respuesta:
3 L
Explicación:
Paso 1: Información provista
Volumen inicial del gas (V₁): 4 LPresión inicial del gas (P₁): 0,79 atmVolumen final del gas (V₂): ?Presión final del gas (P₂): 1,05 atmPaso 2: Calcular el volumen final del gas
Si suponemos que el gas se comporta como un gas ideal y que la temperatura permanece constante, podemos calcular el volumen final del gas usando la ley de Boyle.
P₁ × V₁ = P₂ × V₂
V₂ = P₁ × V₁ / P₂
V₂ = 0,79 atm × 4 L / 1,05 atm = 3 L
Which functional group is shown below?
Answer:
b
Explanation:
a p e x :)
The an ester functional group is given in the picture.
What is an ester?When carboxylic acid and alcohol react together in the presence of acid or alkaline then it form ester.An organic compound (ester)react with water to form carboxylic acid and alcohol.The ester group contain [tex]-COOR[/tex] .Example: [tex]RCOOR[/tex]Where R = Alkyl group.
What is functional group?A substituent ( group of atoms ) in a molecule that responsible for characteristic chemical reaction of the molecules.learn about ester here.
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Which biome has 4 distinct seasons?
A. Desert
B. Rainforest
C. Deciduous Forest
D. Tundra
C. Deciduous Forest
has 4 distinct seasons...
Answer: C. Deciduous Forest
Explanation:
I just searched it up.. and it's mostly where I live which has 4 distinct seasons.
Unit 4 Assessment
Chemical Reactions
Multiple Choice Questions: Choose the best answer for each of the
following questions.
1. 2 H2O2 () 4 Mno." (aq) + 3 CIO2- (aq) 4 MnO2 (s) + 3 CIO, - (aq) + 4 OH
- (aq)
According to the balanced equation above, how many moles of CIO, - (aq)
are needed
to react completely with 20. mL of 0.20 M KMnO, solution?
(A) 0.0030 mol
(B) 0.0053 mol
(C) 0.0075 mol
(D) 0.0040 mol
2.
2 KCIO, (s) 2 KCI (s) + 3 02 (g)
According to the equation above, how many moles of potassium chlorate,
KCIO, must be decomposed to generate 1.0 L of Oz gas at standard
temperature and pressure.
Types of meaning and give me examples in arabic and english about
Steel sinks while wood floats because wood is
A. more buoyant than steel
B. less buoyant than steel
C. equally buoyant to steel
Answer:A
Explanation:The particles in wood are not so closely packed. There is more space in between the particles and fibres, which gives wood its low density. Metals have their particles closely packed such that there is little space inside. This makes metals denser than either wood or water.
HELP QUICK Which of the following planets spins/rotates faster than earth?
A) Saturn
B) Jupiter
C) Venus
D) Mars
Answer:
B
Explanation:
Jupiter is the fastest spinning planet.
3. What does this experiment reveal about the impact of ocean acidification on shelled organisms? How
might this impact affect the rest of the estuary ecosystem?
Answer:
Ocean acidification is sometimes called “climate change’s equally evil twin,” and for good reason: it's a significant and harmful consequence of excess carbon dioxide in the atmosphere that we don't see or feel because its effects are happening underwater. At least one-quarter of the carbon dioxide (CO2) released by burning coal, oil and gas doesn't stay in the air, but instead dissolves into the ocean. Since the beginning of the industrial era, the ocean has absorbed some 525 billion tons of CO2 from the atmosphere, presently around 22 million tons per day.
At first, scientists thought that this might be a good thing because it leaves less carbon dioxide in the air to warm the planet. But in the past decade, they’ve realized that this slowed warming has come at the cost of changing the ocean’s chemistry. When carbon dioxide dissolves in seawater, the water becomes more acidic and the ocean’s pH (a measure of how acidic or basic the ocean is) drops. Even though the ocean is immense, enough carbon dioxide can have a major impact. In the past 200 years alone, ocean water has become 30 percent more acidic—faster than any known change in ocean chemistry in the last 50 million years.
Scientists formerly didn’t worry about this process because they always assumed that rivers carried enough dissolved chemicals from rocks to the ocean to keep the ocean’s pH stable. (Scientists call this stabilizing effect “buffering.”) But so much carbon dioxide is dissolving into the ocean so quickly that this natural buffering hasn’t been able to keep up, resulting in relatively rapidly dropping pH in surface waters. As those surface layers gradually mix into deep water, the entire ocean is affected.
Such a relatively quick change in ocean chemistry doesn’t give marine life, which evolved over millions of years in an ocean with a generally stable pH, much time to adapt. In fact, the shells of some animals are already dissolving in the more acidic seawater, and that’s just one way that acidification may affect ocean life. Overall, it's expected to have dramatic and mostly negative impacts on ocean ecosystems—although some species (especially those that live in estuaries) are finding ways to adapt to the changing conditions.
However, while the chemistry is predictable, the details of the biological impacts are not. Although scientists have been tracking ocean pH for more than 30 years, biological studies really only started in 2003, when the rapid shift caught their attention and the term "ocean acidification" was first coined. What we do know is that things are going to look different, and we can't predict in any detail how they will look. Some organisms will survive or even thrive under the more acidic conditions while others will struggle to adapt, and may even go extinct. Beyond lost biodiversity, acidification will affect fisheries and aquaculture, threatening food security for millions of people, as well as tourism and other sea-related economies
there is more lines go to https://ocean.si.edu/ocean-life/invertebrates/ocean-acidification
Why do you think earthquakes and volcanoes occur in patterns?
Answer: ANSWER BELOW
Explanation:
Because that is the way it works.
Which best describes how decomposers recycle energy in an ecosystem?
A.
Decomposers break down energy sources within the ecosystem.
B.
Decomposers provide energy directly to producers in an ecosystem.
C.
Decomposers provide energy directly to consumers in an ecosystem.
D.
Decomposers break down decayed matter and return the energy to the ecosystem.
Answer:
The statement “Decomposers are those organisms that recycle matter in the ecosystem” describes decomposers.
Decomposers are organisms that break down dead or decaying organisms, and in doing so, they carry out the natural process of decomposition.
What force works against friction?
inertia
kinetic
potential
Answer:
kinetic is the correct answer. can I get brainliest please
What can the reader conclude about the effects of hurricanes?
They only cause damage near the equator.
They cause most of their damage when they reach land.
The damage is only bad if you are inside the eye of the storm.
People are safe from hurricanes if they stay inside of their homes.
In a chemical reaction, mass is conserved. This means that...
O A. The mass of the reactants stays the same during a chemical reaction
OB. The mass of the products stays the same during a chemical reaction
OC. The tpye and number of atoms in the reactants equals the type and number of atoms in the products
OD. The mass of the products is always twice the mass of the reactants
Answer: D
Explanation:
A certain seed is surrounded by a sticky coating. It is fairly dense and does
not float in water. How is this seed most likely to spread?
Answer: it attaches to the fur of an animal, and it sprouts after it falls from the animal’s fur
Explanation:
How many grams are in 11.9 moles of potassium sulfide, K2S?
CAN SOMEBODY PLEASE HELP ME!!??
Answer:
its the top one
Explanation:
In what way may drugs be used to affect neurotransmitters?
How many moles of aluminum nitrate can be produced with 0.68 moles of lead nitrate?
i have no idea can somebody help me too
What are 3 kinds of moles
HELP
The potential energy diagram for a reaction starts at 180 kJ and ends at 300 kJ. What type of reaction does the diagram best represent? (5 points)
Exothermic reaction
Endothermic reaction
Reaction between two solids
Reaction between two liquids
Answer:
Exothermic reaction
Explanation:
An exothermic process releases heat, causing the temperature of the immediate surroundings to rise
Answer:
Endothermic
Explanation:
Will give brainliest please help!!!
Answer:
0
Explanation:
im pretty sure its 0 pls mark me as brainliest
Why is wind considered a renewable resource?
А
Wind will never stop being produced.
B
Wind energy is not useful.
с
There's a fixed amount of wind.
a
D
We are using wind too quickly.
Answer:
wind will never stop being produced
Explanation:
A 3.83 M solution of iron (II) perchlorate (Fe(ClO4)2) is prepared with 2.1 g of the solute. What volume, in mL, of solution was prepared?
If 24 grams of sodium chloride reacts with an excess amount of magnesium how many grams of sodium oxide will be produced