Answer:
plate drifting
Explanation:
Plate tectonics
Plate tectonics is the theory that Earth's land masses are in constant motion. The realization that Earth's land masses move was first proposed by Alfred Wegener, which he called continental drift.
Answer:
Plate drifting
Explanation:
Plate drifting is similar to plate tectonics.Earth's surface consists of different plates.These plates keep moving slowly all time .So slowly the continents have been formed by this tectonics (Still going on)mg(s) + 2hcl(aq) mgcl2(aq) + h2(g)
Please give me a real answer please!
In this reaction Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g) Magnesium acts as a reducing agent.
Only question should be of 4 or answer of other questions should also be there.
What is the total number of neutrons in an atom of O-18? a) 18 b) 16 c) 10 d) 8
Answer:
There are 10 neutrons
Explanation:
Because the atomic number is 8 and the isotope number is 18 (which is the collective protons and neutrons), we can do
18-8=10
Answer:
10
Explanation:
8 proton because it is oxygen
10 neutron because 18-8
I need help on this please
Answer:
D looks right to me, but if I'm wrong then sorry
please help me I need this done
Select the correct answer.
Which bond theory can easily predict magnetic and ionization properties?
A valence bond theory
В. molecular orbital theory
C. modern valence bond theory
D both molecular orbital and valence bond theories
Answer:
b molecular orbital therory
What is the mass of 1.20 × 1023 atoms of phosphorus?
show your work, please.
1227.6
Explanation:
po ang sagot khit i calculate nyo
In the molecule above, the black circles are Carbon, the blue circles are Hydrogen
and the red circles are Oxygen. Which formula below is correct for this molecule?
Answer:
C2H4O2
Explanation:
According to Newton's 3rd Law of Motion, if a force is exerted on an object, how does the other force occur?
A.Another force occurs that is in the same direction and at the same speed.
B. Another force occurs that is in the same direction and is the same size.
C. Another force occurs that is equal in size and opposite in direction
D. Another force occurs that is equal in speed and opposite in direction.
Answer:
Explanation:
According to Newton's third law of motion, forces always act in equal but opposite pairs. Another way of saying this is for every action, there is an equal but opposite reaction. ... When one object exerts a force on another object, the second object exerts the same size force on the first object
the answer is B
Answer:
C. Another force occurs that is equal in size and opposite in direction
Explanation:
According to Newton's 3rd Law of Motion, if a force is exerted on an object, how does the other force occur?
A.Another force occurs that is in the same direction and at the same speed.
B. Another force occurs that is in the same direction and is the same size.
C. Another force occurs that is equal in size and opposite in direction
D. Another force occurs that is equal in speed and opposite in direction.
NEWTON SAID "FOR EVERY ACTION, THERE IS AN EQUAL AND OPPOSITE REACTION"
Se preparan 800g de una disolución, para ello se disuelve 5g de un soluto, determinar la composicion de la solucion en %m/m
Answer
800g
Explanation:
how many grams of aluminum nitrate are required to make a 100 grams of saturated solution at 40C?
Answer:
29 grams
Explanation:
At 20°C, a saturated solution of sodium nitrate (NaNO3) contains 86 grams of solute in 100 m of water.
This means the solubility of NaNO3 at 20°C is 86 g/100 ml of water
The solubility of NaNO3 at 50 °C is 115 grams of NaNO3/100 ml of water.
Therefore; to get the amount of sodium nitrate must be added to saturate the solution at 50°C;
We subtract the solubility at 20°C from the solubility at 50 °C
That is; 115 g/100 ml of water - 86 g/100 ml of water
= 29 grams of NaNO3
ANSWER ASAP!!!! WILL GIVE BRAINLIEST IF RIGHT
a student is given a mixture of sand and salt. describe a method the student could use to separate the mixture.
There is a golden role of solubility, polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, Salt and sand can be separated by dissolving the salt in water, filtering the mixture, and then evaporating the water to recover the salt.
What is solution?Solutions are a homogeneous mixture of two or more substances. A solution is a homogeneous mixture of solvent and solute molecules. Solvent is a substance that is in large amount in solution.
Solute is the substance which is in small amount in a solution. Salt and sand can be separated by dissolving the salt in water, filtering the mixture, and then evaporating the water to recover the salt.
Therefore, Salt and sand can be separated by dissolving the salt in water, filtering the mixture, and then evaporating the water to recover the salt.
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this is because the blank attractive forces between the ions result in a very blank structure
Answer:
This is because the large attractive forces between the ions result in a very stable structure.
When table salt forms, which action occurs between the reacting elements? (1 point)
O Chlorine donates an electron to sodium.
Sodium shares an electron with chlorine. O Sodium donates an electron to chlorine.
O Chlorine exchanges an electron with sodium.
Answer: C: Sodium donates an electron to chlorine.
Explanation:
Sodium wants to lose an electron and chlorine wants to gain an electron to become stable. This is because of their place in the periodic table, sodium being on the very left edge and chlorine on the very right (noble gasses dont count as they are stable to begin with)
Therefore sodium will donate to chlorine so they both become stable with an ionic bond. (another way to tell its ionic is the very large difference in electronegativity)
When table salt forms, sodium donates an electron to chlorine resulting in the formation of bond which is formed when the electronic configurations become stable.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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2) What organization led the fight to stop this practice?
Answer:
abolitionist movement
Explanation:
What makes inertia important in that activity?
please help me I need it now
Answer:
Ok for the question you can make up your own
If you can't make up your own tell me so I can try my best to come up with questions
1. Answer: Since and last are adverbs so am not sure how that part going to go
Type of Adverb for since is: Time
Type of Adverb for last is : Time
2. Question:
Answer: happily
Type: Manner
Hopes this helps you.
A chemical property is a change in _____.
hardness
density
composition of matter
physical state
Answer:
Composition of matter
11) When sodium metal is subjected to violet light, it causes the photoelectric effect. However, red light does not affect
the sodium. Explain this phenomena.
The phenomena in which violet light causes photoelectric effect and red light does not is because red light does not achieve the minimum frequency for the phenomenon to occur but violet light does.
The phenomenon in which a substance emits electrons when light is incident upon it is called the photoelectric effect.
This electron would not be emitted if the frequency of the light does not exceed a minimum frequency called the threshold frequency.
Since in the case of the sodium metal, violet light causes the photoelectric effect while red light does not.
This implies that red light does not exceed the minimum frequency for the photoelectric effect to occur, but violet light does thereby causing the photoelectric effect to occur.
So, the phenomena in which violet light causes photoelectric effect and red light does not is because red light does not achieve the minimum frequency for the phenomenon to occur but violet light does.
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Though hydrochloric acid is formed inside our body, it is not called organic acid. Why?
Explanation:
Hydrochloric acid does not consider as organic acid because of the absence of carbon in it.
hope it helps
What do the arrows in the photograph represent?
0 A. An action-reaction force pair
B. Noncontact
forces
C. Balanced forces
D. Friction and air resistance
Answer:
C. Balanced forces
Explanation:
What do the arrows in the photograph represent Balanced forces
Please help, just help me please
35. Elemental phosphorus burns in oxygen with an intense flame, producing a brilliant light and clouds of the oxide product. These properties of the combustion of phosphor led to its being used in bombs and incendiary de warfare. P4(s) + 502(8) --> 2P205(s) If 4.95 g of phosphorus is burned, what mass of sy it combine with?
I'm gonna assume you want to find how much mass of oxygen 4.95g of phosphorus reacts with
Answer:
P4(s) + 502(8) --> 2P205(s)
We know that Phosphorus is polyatomic and Oxygen Gas is diatomic
Atomic mass of Phosphorus= 30.97g/mol
Atomic mass for Oxygen = 16g
4 * 30.97 = 123.88g
2 * 16 = 32g
Since there are 5 moles of oxygen: 5 * 32 = 160g
Ok, so 160g of oxygen will react 123.88g of Phosphorus
4.95g phosphorus burns with how much oxygen?
4.95 * 160g
123.88g
= 6.4g of Oxygen
Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. Suppose 3.24 g of hydrobromic acid is mixed with 2.3 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.
Answer:
7.20 X 10^-2 gm
Explanation:
Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. Suppose 3.24 g of hydrobromic acid is mixed with 2.3 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.
HBr(aq) + NaOH (S)-----------> NaBr (aq) + H20
mol wt of HBr = 1 + 79.9 = 80.9
3,24 gm of HBr = 3.24/80.9 = 0.00400moles = 4.00 X 10^-3 moles
mol wt of NaOH = 23.0 + 16.0 +1.01 = 40.0 gm
2.3 gm = 2.3/40.0 = 0.058 moles =5.8 X 10^-2
the reaction of HBr and NaOH is 1:1.
there are not enough moles of HBr to neutralize all of the NaOH. so
only 4.00X10 ^-3 moles of H2O can be produced
mol weight of H2O is (2 X 1.01) + 16.0 = 18.0
The maximum mass of H2O that can be produced is
18.0 X 4.00X10^-3 = 72.0/1000 =7.20 X 10^-2 gm
65,000(0.08 x 200x 0.004) / (800x300)
Perform the following operations giving the proper number as a benefit get figures in the answer.
Help
Answer:
Use calculator but first group them one by one and open the bracket by solving them accordingly
The number we get by this operation is 0.016. This number can be taken based on the rules for significant figures.
What is significant figures?The number of significant figures is the number of digits that are known with certainty plus the last one having some uncertainty. All non zero values are significant and zero preceding first non zero digit is not significant .
For example in 65000, there are only two significant figures. Similarly in 0.08 only one significant digit is present. Now when we multiply two decimal numbers, the result can only have as many decimal places as there are in the value with fewest decimal places.
First, multiply the numbers inside the bracket. As per the above rule, the result should contain only two decimal places.
(0.08 ×200×0.004) = 0.06
Multiply by 65000 - 0.06×65000 = 3900
Now divide it by the multiplication product (800× 300), 240000 we get as follows:
3900÷240000 = 0.016
Hence the result of this operation is 0.016.
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What are compounds????????????????
Answer:
Compounds are pure substance consisting of two or more different atoms
Answer:
I hope this help
Explanation:
pls brainliest
A GIRL WAIKS 10M NORTH,15M EAST AND THEN FINALLY 20MSOUTH FIND HER DISPLACEMENT
Answer:
see this
Explanation:
how long do you have to cook a turkey after it thaws
Answer:
Explanation:
A thawed turkey can remain in the refrigerator for 1 to 2 days. If necessary, a turkey that has been properly thawed in the refrigerator may be refrozen.
...
Thawing Your Turkey.
Thawing in cold water Time to thaw (allow 30 minutes per pound)
16 to 20 pounds 8 to 10 hours
20 to 24 pounds 10 to 12 hours
What is the maximum number of electrons in an atom that can have the following quantum numbers? Specify the orbitals in which the electrons would be found. (a) n = 2, ms = +1 2; (b) n = 4, mℓ = +1; (c) n = 3, ℓ = 2; (d) n = 2, ℓ = 0, ms = −1 2; (e) n = 4, ℓ = 3, mℓ = −2.
Answer:
1.04
Explanation:
Coal and diamond are both minerals .they are both expensive.why
Answer:
hard to find
Explanation:
Answer:
because actually diamonds is coal.
Explanation:
how diamonds is coal? because when the coal gets very high pressure it turns into diamonds.
if the products of a reaction have higher energy than the reactants, then the reaction...
Answer:
Explanation:If the products of a reaction have higher energy than the reactants, then the reaction...
Which of the following shows the combustion of a hydrocarbon?
Answer:
c
Explanation:
A hydrocarbon consists of only carbon and hydrogen atoms. Combustion occurs when a hydrocarbon reacts with oxygen to form carbon dioxide and water molecules.
