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.
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
What are 3 kinds of moles
If 24 grams of sodium chloride reacts with an excess amount of magnesium how many grams of sodium oxide will be produced
Will give brainliest please help!!!
Answer:
0
Explanation:
im pretty sure its 0 pls mark me as brainliest
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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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
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
In what way may drugs be used to affect neurotransmitters?
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 describes the molecule shown below?
H
HC-H
H
Η Η
H-C-C-C-C-H
IL
Η Η Η Η
A. Unsaturated alyane
B. Unsaturated alkene
ОС
C. Saturated alkene
D. Saturated alkane
Answer:
Option D. Saturated alkane
Explanation:
To know which option is correct, it is important that we know what saturated and unsaturated compounds are in this context.
Saturated hydrocarbons are compounds which has only carbon to carbon single bonds (C–C) in its chain. A very good example of such compound is the Alkanes.
Unsaturated hydrocarbons are compounds which has either a carbon to carbon double bond (C=C) or a carbon to carbon triple bond (C≡C) in its chain. Examples of such compounds include alkenes and alkynes.
Now, let us answer the question given above bearing the meaning of saturated and unsaturated compounds in mind.
The compound given above contains only carbon to carbon (C–C) single bond.
Therefore, the compound is a saturated alkane.
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
PHYSICAL CHANGE OR CHEMICAL CHANGE
1.When making a sauce, a chef boils the alcohol until it changes to a gas and leaves the pan.
2. A scientist adds high pressure to gaseous oxygen until it turns into a gas.
3. Hydrogen sets fire and burns when exposed to oxygen and a spark.
4. A person accidentally drops a mirror so that it shatters.
5. A child falls from a tree and breaks a bone.
6. As soon as you begin eating, your body starts to digest food. The process of digestion is a
7. After dipping a piece of a chicken into batter, a person puts it into a deep fryer. The process of frying chicken is a
8. When a person slices tomatoes before adding them to a salad, what type of change did the tomatoes experience
9. Sugar is dissolved completely into water.
10. A branch rots and decomposes after falling from a tree
Answer:
1.Chemical Change
2.Chemical Change
3.Chemical Change
4.Physical Change
5.Physical Change
6.Chemical Change
7.Chemical Change
8.Physical Change
9 Physical Change
10.Physical Change
Explanation:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula.
How does the [H+] concentration change in a sample as the pH scale decreases 2 units? (make sure to say whether it goes up or down and by how much)
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 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?
What is the Hso for NaCl → Na+ + C1-? The lattice energy is –788 kJ/mol, the enthalpy of hydration for Na+ is -410
kJ/mol, and the enthalpy of hydration for cr- is -313 kJ/mol. Use AH sor=-Har + Hhydr.
A. -1,511 kJ/mol
B. -855 kJ/mol
C. 65 kJ/mol
D. 1,511 kJ/mol
Answer:
c
Explanation:
he diagram shows a device that uses radio waves.
Two radio towers. The towers are equal distance apart with an arrow between them. The left tower is labeled X. The right tower is labeled Y. The arrow is pointing from Tower X to Tower Y.
What is the role of the part in the diagram labeled Y?
modulate, amplify, and send out waves
capture, amplify, and demodulate waves
change the amplitude and frequency of waves
change the pulse and phase of waves
Answer:
b
Explanation:
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
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
Why do you think earthquakes and volcanoes occur in patterns?
Answer: ANSWER BELOW
Explanation:
Because that is the way it works.
What force works against friction?
inertia
kinetic
potential
Answer:
kinetic is the correct answer. can I get brainliest please
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%.
How many moles are in 8.0 gram sample of C3H4
Answer:
0.18 mol C₃H₈
Explanation:
to find the mole you have to convert the 8.0grams into moles.
8.0g C₃H₈ 1 mol C₃H₈
1 44.0g C₃H₈
*Pretend that those are a table*
I got 44.0g because Carbon is 12.0g you multiply that 3 times because it has a subscript of 3 and do the same for Hydrogen (1.0 x 8) then add those which would be 44.0g.
1 mol of C₃H₈ = 44.0g C₃H₈
now just mulitply and divide them.
8.0g x 1 = 8.0
1 x 44.0g = 44.0
8.0/44.0 = 0.18 mol C₃H₈
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.
How many grams are in 11.9 moles of potassium sulfide, K2S?
CAN SOMEBODY PLEASE HELP ME!!??
Answer:
its the top one
Explanation:
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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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:
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: