Answer:
According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.
5. Which diagram represents the alignment of the Earth, Moon and Sun during a spring
tide?
Answer:
the second one
Explanation:
I believe its thhe second one because isnt it when the earth is closest to the sun its winter.
i know its seems weird but that's what I learned
There are reasons for alignment. The second diagram represents the alignment of the Earth, Moon and Sun during a spring tide.
What is the alignment of the Earth moon and sun during a spring tide?Spring tides is known to often take place when the Earth, the Sun, and the Moon are said to be in one line.
This brings about a rise in the gravitational pull on the oceans. Few times, the Sun and Moon are known to be opposite sides of the Earth.
When you see the second diagram, you will see that they are on the same side and line.
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Please help with this problem!!! ASAP!
Answer:
2.94 × 10²⁴ molecules
Explanation:
Step 1: Given data
Volume of acetone (V): 360 mL (360 cm³)
Density of acetone (ρ): 0.788 g/cm³
Step 2: Calculate the mass of acetone (m)
Density is equal to the mass of acetone divided its volume.
ρ = m/V
m = ρ × V
m = 0.788 g/cm³ × 360 cm³ = 284 g
Step 3: Calculate the moles corresponding to 284 g of acetone
The molar mass of acetone is 58.08 g/mol.
284 g × 1 mol/58.08 g = 4.89 mol
Step 4: Calculate the number of molecules in 4.89 moles of acetone
We will use Avogadro's number: there are 6.02 × 10²³ molecules of acetone in 1 mole of molecules of acetone.
4.89 mol × 6.02 × 10²³ molecules/1 mol = 2.94 × 10²⁴ molecules
helppp nowwww plsss!!!
Answer:
it is D
Explanation:
A tree for one is a renewable resource, but. It said "farmed trees" therefore the best way to farm trees it well, to farm them. But to sustainably farm them you would need to replace what you destroyed to be able to keep farming in the future.
Answer:
New trees are planted to replace those that are cut down is the correct answer.
have a nice day! (^o^)
Please help!!! Is the following example of synthesis? 2H2 + O2 —> 2H2O
Answer:
hahahaa i can get the points
Explanation:
yes it is again LOL thanks
What are the two cell division stages in the mitotic phase of the cell cycle?
HELP
NOW
Balance this equation: C2H5OH(1)+O2(g)—> CO2(g)+H2O(g)
Answer:
C2H5OH +O2(g)_CO2(g)+H2O(g) (unbalanced)
C2H5OH +3O2(g)_2CO2(g)+3H2O(balanced)
what is an invasive species and how can it affect an ecosystem
Answer:
Here
Explanation:
An invasive species is an organism that causes ecological or economic harm in a new environment where it is not native. ... Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats.
the the largest four digit number 3629
Answer:
9999
Explanation:
If you do 10,000 that would be too much
7. What is the maximum amount of NaCl that can be
dissolved (in 100g of water) at 90°C?
Answer:
Maximum amount of NaCl that can be Dissolved in 100g of water at 90'C
Explanation:
In fact, you can expect to be able to dissolve no more than 40 g of sodium chloride per 100 g of water at 80∘C . So, at 80∘C , you will have an unsaturated solution if you dissolve less than 40 g of sodium chloride, and a saturated solution if you dissolve about 40 g of sodium chloride
Answer:
The maximum amount of NaCl that can be Dissolved in 100g of water at 90'C
Explanation:
In fact, you can expect to be able to dissolve no more than 40 g of sodium chloride per 100 g of water at 80∘C . So, at 80∘C, you will have an unsaturated solution if you dissolve less than 40 g of sodium chloride, and a saturated solution if you dissolve about 40 g of sodium chloride.
PLEASE HELP MEEEEEEEEEEEEEEEEEEEEEEE
Which state of matter consists of particles that are close together in a random pattern?
Gas
Liquid
Plasma
Solid
Answer: The answer is liquid
Explanation:
The state of matter consists of particles that are close together in a random pattern is liquid . Hence , Option (B) is correct.
What is States of matter ?
When energy is added or removed to matter, it changes state to form a state of matter.
A state of matter is defined as one of the ways in which matter can interact with itself to form a homogeneous phase.
Therefore , The state of matter consists of particles that are close together in a random pattern is liquid . Hence , Option (B) is correct.
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Help me please TwT. I really need it TwT
Answer:
The air moves to the low pressure system creating wind.
Hope this helps! :)
can someone please help me!
Answer:
Explanation:
C defo
Use stoichiometry to determine how many moles of O2 are needed
to completely react with 2.25 moles of C3H8. Please show your work
Answer:
11.25 moles of O₂.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
C₃H₈ + 5O₂ —> 3CO₂ + 4H₂O
From the balanced equation above,
1 mole of C₃H₈ reacted with 5 moles of O₂.
Finally, we shall determine the number of mole of O₂ needed to react with 2.25 moles of C₃H₈. This can be obtained as follow:
From the balanced equation above,
1 mole of C₃H₈ reacted with 5 moles of O₂.
Therefore, 2.25 moles of C₃H₈ will react with = 2.25 × 5 = 11.25 moles of O₂.
Thus, 11.25 moles of O₂ is needed for the reaction.
How many total moles of ions are released when 0.0341 moles of Na2HPO4 dissolves completely in water
Answer:
0.1023 moles
Explanation:
We have this reaction
Na2HPO4 → 2Na+ + NPO4-
1 mole gives us 3 ions
Na+ has 2 ions to it
NPO4 has 1 ion
2 + 1 = 3
We multiply 3 with the number of moles to get the answer to this question
3 x 0.0341
= 0.1023 moles
So we conclude that total moles released when dissolved in water is equal to 0.1023
Someone help with these questions??
Answer:
2) true 3)I think I A and there you go
Thermal Energy Transfer Lab Edge
2021
help
please
Explanation:
same✊ raaaate meee please
Please hurry I'm in a test... 50 pts :)) HIGH SCHOOL CHEMISTRY
Reactant P contains 50 J of energy, and reactant Q contains 35.3 J of energy. The reactants combine to form product PQ, which contains 104 J of energy. What is the energy transformation?
Energy is absorbed because the product has more energy than the reactants have.
Energy is absorbed because the product has less energy than the reactants have.
Energy is lost because the product has more energy than the reactants have.
Energy is lost because the product has less energy than the reactants have.
Answer:
A. Energy is absorbed because the product has more energy than the reactants have.
Here the energy of both reactants is combined together and not released.
What is the capillary rise of ethanol in a glass tube with a 0.1 mm radius if the surface tension of ethanol is 0.032Jm2 and the density of ethanol is 0.71gcm3
Answer:
Explanation:
Expression for capillary rise is as follows
h = 2T / ρ g r where T is surface tension , ρ is density of liquid and r is radius of capillary tube.
T = .032 J m⁻²
ρ = .71 g / cm³
= 7100 kg / m³
r = .1 x 10⁻³ m = 10⁻⁴ m
h = 2 x .032 / (7100 x 9.8 x 10⁻⁴ )
h = .0092 m
= 9.2 mm .
Many factors would bring advantages when using fuel cells in cars but which factors present a drawback?
Answer:
B. hydrogen storage
Explanation:
Answer: B hydrogen storage
Explanation:
correct on edge 2020
WILL GIVE BRAINLIEST!!!!
Any type or form of energy can change into any other type of energy. This is referred to as _____.
A. energy transformations
B. law of conservation of mass
C. law of conservation of energy
D. mechanical energy
Answer:
C
Explanation:
The Law of Conservation of energy is that energy can be transformed from one form to another, but can be neither created or destroyed.
The Coriolis effect is the deflection of winds to the right in the Northern Hemisphere and to the left in the Southern Hemisphere because of Earth's rotation. Lesson 2.09 True False
Answer:
True
Explanation:
The Coriolis effect is the deflection of winds to the right in the Northern Hemisphere and to the left in the Southern Hemisphere because of Earth's rotation. This statement is true.
What is Coriolis effect ?Circulating air is deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere as the Earth rotates on its axis. The Coriolis effect refers to this deflection.
Because of the rotation of the Earth, we experience an apparent force known as the Coriolis force. The wind is deflected to the right in the northern hemisphere and to the left in the southern hemisphere as a result of this.
There is no curving of the object's path as measured relative to the Earth's surface because there is no turning of the Earth's surface underneath a horizontally and freely moving object at the equator.
Thus, There is no Coriolis effect because the object's path is straight.
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2. How many grams are in 19 moles of N2?
Answer:
532.2546
Explanation:
if i ask how many grams Are in a mole of N2 it would be 28.0134 grams and your asking 19 so 28.0134 x 19 would be 532.2546 grams
In a reaction of iron and oxygen to produce iron (III) oxide, 12.5 grams of iron was consumed. The limiting reagent is ____ (compound) if 5.2 grams of oxygen was present. The theoretical yield (amount that is produced) is ____ (mass to the second decimal)
Blank 1:
Blank2:
Answer:
The limiting reagent is O₂ if 5.2 grams of oxygen was present. The theoretical yield is 17.25g of Fe₂O₃
Explanation:
The reaction is:
4Fe + 3O₂ → 2Fe₂O₃
We convert the mass of each reactant to moles:
12.5 g . 1mol / 55.85g = 0.224 moles of Fe
5.2g . 1 mol/ 32g = 0.1625 moles of oxygen.
We analyse the stoichiometry.
4 moles of Fe react to 3 moles of O₂
Then 0.224 moles of Fe will react to (0.224 . 3)/4 = 0.1678 moles of O₂
I need 0.1678 moles of O₂ and I only have 0.1625. Oxygen is the limiting reactant.
Now we go to the products:
3 moles of O₂ can produce 2 moles of Iron (III) oxyde
Then, 0.1625 moles of O₂ may produce (0.1625 . 2)/3 = 0.108 moles of Fe₂O₃
We convert the moles to mass:
0.108 mol . 159.7g /1mol = 17.25 g
C + O2 = CO2
If 12g of C reacts with 40g of O2, How much CO2 will be formed? State the law which governs your answer. (5 Mark)
PLEASE ANSWER FAST
Answer:
44 grams of CO₂ will be formed.
Explanation:
The balanced reaction is:
C + O₂ → CO₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:
C: 1 moleO₂: 1 moleCO₂: 1 moleBeing the molar mass of each compound:
C: 12 g/moleO₂: 32 g/moleCO₂: 44 g/moleBy stoichiometry the following mass quantities participate in the reaction:
C: 1 mole* 12 g/mole= 12 gO₂: 1 mole* 32 g/mole= 32 gCO₂: 1 mole* 44 g/mole= 44 gThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
If 12 grams of C react, by stoichiometry 32 grams of O₂ react. But you have 40 grams of O₂. Since more mass of O₂ is available than is necessary to react with 12 grams of C, carbon C is the limiting reagent.
Then by stoichiometry of the reaction, you can see that 12 grams of C form 44 grams of CO₂.
44 grams of CO₂ will be formed.
Describe how to calculate the Rf value for a spot on a TLC plate.
Answer:
In thin-layer chromatography, the retention factor (Rf) is used to compare and help identify compounds. The Rf value of a compound is equal to the distance traveled by the compound divided by the distance traveled by the solvent front (both measured from the origin).
1.The splitting of a heavy, unstable nucleus into two lighter nuclei is called _____.
a. Fission
b. Fusion
c. Radioactive Decay
d. Isotopes
Answer:
A) Fission
Explanation:
Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.
PLZZZZZZZZ HELP How many moles of nitrogen gas are in a 10.0 L container at STP?
22.4 moles
10.0 moles
6.02×1023 moles
0.45 moles
Answer:
0.45 moles
Explanation:
1 mole of gas at s.t.p gives 22.4dm3 when converted to litre it will be 22.4l/ x mole of N2 will give 10.0l the answer is equal to 0.45mole
Account for the difference in the shape and color of the potential maps for ammonia and the ammonium ion.
Answer:
Explained below.
Explanation:
The difference between the two of them will be considered from their electrostatic potential maps.
First of all the major difference is that ammonia molecule(NH3) has a lone lone pair of electron on the N atom.
Due to the this lone pair of electron on the N - atom of ammonia, it's bond angle will be slightly lesser than that of ammonium ion.
Therefore, In the electrostatic potential map of NH3, the charge distribution will not be symmetrical for the fact that there is electron rich N atom and so the N atom will be more red than the 3 hydrogen atoms (H atoms).
Whereas, the electrostatic potential map of NH4+ (ammonium ion) will be symmetrical due to the even/symmetrical distribution of all the 4 hydrogen atoms surrounding the central Nitrogen atom.
Also, the Nitrogen atom here in ammonium ion will have a lower electron density than the Nitrogen atom that's present in ammonia molecule due to the bonding existing between the lone pair electron and the Hydrogen atom
Please help!! Also please provide an explanation
Answer:
Chlorine
Explanation:
chlorine is the element that shows similar chemical properties as bromine because this element is in the same group in the periodic table show similar properties they belong to 17th group.
Measurements show that unknown compound has the following composition: element mass 62.1 % carbon, 10.5 % hydrogen and 27.6 % oxygen. Write the empirical chemical formula of this compound?
Answer:
C3H6O
Explanation:
The percentage composition of the elements in the compound are given as follows:
62.1 % carbon = 62.1g of C
10.5 % hydrogen = 10.5g of H
27.6 % oxygen = 27.6g of O
Next, we convert each mass to mole by dividing by their molar/atomic mass
C = 62.1/12 = 5.175mol
H = 10.5/1 = 10.5mol
O = 27.6/16 = 1.725mol
Next, we divide each mole value by the smallest mole value (1.725)
C = 5.175mol ÷ 1.725 = 3
H = 10.5mol ÷ 1.725 = 6.086
O = 1.725mol ÷ 1.725 = 1
The empirical ratio approximately of C:H:O is 3:6:1, hence, the empirical formula is C3H6O