Answer:True
Explanation:
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Why are the Hawaiian islands in a chain? *
1-the islands are along a tectonic plate boundary (edge)
2-the islands are along a long crack in the crust
3-the plate moves over the hot spot which stays in one place
4-all of the above
someone help asap please i suck at chem
Answer:
32.909318
Explanation:
I hope this helped
What is a responding variable
Answer:
A manipulated variable is also called an independent variable. A responding variable is a variable that the researcher predicts will change if the manipulated variable changes. A responding variable is also called a dependent variable.
The question is
Which circuit will have the greatest electric current?
1. Circuit 2
2. Circuit 1
3. Circuit 4
4. Circuit 3
Answer:
4
Explanation:
because is has the greatest volt
2. Clouds are
(a) tiny drops of water floating in air.
(b) mixture of dust and water vapour.
(c) particles of water vapour.
(d) rain drops in air.
3. Floods cause extensive damage to
(a) crops.
(b) property and human life.
(c) domestic animals.
(d) all of the above.
4. “Catch water where it falls” is the basic idea behind
(a) Recycling of water.
(b) Making dams to store water.
(c) Rain water harvesting.
(d) Condensation of water vapour.
5. In which of the following case evaporation of water will be slowest?
(a) A tray of water kept in sunlight.
(b) A kettle of water kept on a burner.
(c) A glass of water kept in a room.
(d) A bucket of water kept on rooftop.
Answer:
2 b
3d
4c
5c
Explanation:
please give brainlest
Which one of the following is an incorrect orbital notation?
B. 4f
C. 2d
D. 3s
E. 2p
(no 'A')
The answer option which is an incorrect orbital notation is: C. 2d.
A sublevel refers to an energy level that is typically associated with the valence electrons found outside an atomic nucleus.
In Chemistry, there are four (4) main types of sublevel and these includes:
s orbital (sublevel): 3sp orbital (sublevel): 2pd orbital (sublevel): 3df orbital (sublevel): 4fHowever, it is impossible for any atom of a chemical element to have a 2d orbital because electrons are generally located in the s and p orbitals (sublevels) in the second energy level.
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(25 POINTS AND BRAINLIEST)What is the volume of 2 mol of chlorine gas at STP?
2.0 L
11.2 L
22.4 L
44.8 L
Answer:
44.8
Explanation:
According to standard temperature and pressure and ideal gas equation , the volume of 2 mole of chlorine gas at STP is 44.8 liters.
What are standard temperature and pressure conditions?Standard temperature and pressure are defined as a standard set of conditions required for experimental measurements which are established to allow comparison between different sets of data.
Standards which are commonly used are those International Union of pure and applied chemistry and national institute of standards and technology.These are not universally accepted standards but are the ones which are commonly used.
Standard conditions of pressure and temperature are necessary to define standard reference conditions used to express volumes of liquids and gases.
These values are important to physicists, chemists ,engineers ,pilots and navigators.On substituting values in ideal gas equation, volume= 2×8.314×273/1=44.8 liters.
Thus, the volume of 2 mole of chlorine gas at STP is 44.8 liters.
Learn more about standard temperature and pressure , here:
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What is the mass of 7.5 x 10^24 molecules of NaCl?
Answer:
Molar mass of NaCl = 58.44277 g/mol
This compound is also known as Sodium Chloride.
Convert grams NaCl to moles or moles NaCl to grams
Molecular weight calculation:
22.98977 + 35.453
Explanation:
Volume of 8.625 g of sulphur di oxide at RTP in cm3
Answer:
The volume of 8.625 g of sulphur dioxide at RTP is approximately 3,230.84 cm³
Explanation:
The question requires the determination of the volume occupied by the gas based on the molar volume of a gas at STP
The given parameters of the sulphur dioxide, SO₂, gas are;
The mass of the given SO₂ gas = 8.625 g
The molar mass of SO₂ = 64.07 g/mol
The number of moles, 'n', in the given sample of SO₂ gas = Mass of SO₂/(Molar Mass of SO₂)
∴ The number of moles of SO₂ in the gas sample = 8.625 g/(64.07 g/mol) ≈ 0.134618386 moles
The molar volume of a gas at RTP is approximately 24 dm³/mole
24 dm³ = 24,000 cm³
∴ The molar volume of a gas at RTP is approximately 24,000 cm³/mole
The volume occupied by a gas at RTP = (The number of moles of the gas) × (The Molar Volume of a gas at RTP)
∴ The volume occupied by the 8.625 g of SO₂ gas at RTP = 0.134618386 moles × 24,000 cm³/mole ≈ 3,230.84 cm³
The volume occupied by the 8.625 g of SO₂ gas at RTP ≈ 3,230.84 cm³.
2. Calculate the number of moles of propane you have in 5.78 x1024 molecules of propane = CH
Answer:
Molar mass of C3H8 = C 3 (12.01 g/mol) = 36.03 (g/mol)
H 8 (1.008 g/mol) = 8.064 (g/mol)
44.09 (g/mol)
74.6 g propane x 1 mole propane x 6.022 x 10
23
molecules
44.09 g propane 1 mole propane
= 1.02 x 10
24 molecules propane
Explanation:
In a dynamic equilibrium between the liquid state and the gas state, the rate of evaporation
A. is greater than the rate of condensation
B. is less than the rate of condensation
C. is equal to the rate of condensation
FB and were to bond the difference in electronegativity would be
and we would expect the bond to be
ionic covalent, poler covalent)
ASAP quick
What is the molar mass of methane (CHA)?
A. 16.05
grams
O B. 13.02 grams
O C. 49.05 grams
O D. 10 grams
How do spines help a cactus survive?
A:They protect the plant from being eaten by animals.
B:They anchor the plant to the ground.
C:They hold the plant upright and help it take in sunlight.
D:They take in sunlight and carry out photosynthesis.
What is the enzyme that breaks down sugar ??
Answer:
sucrase-isomaltase
Explanation:
Pure metals are _____.
used less often than alloys
are more resistant to corrosion than alloys
used more often than alloys
harder than alloys
Answer:
Pure metals are those metals that have not been alloyed with other metallic elements; commercially pure metals are 99% pure minimum.
Explanation:
1. What makes carbon such a unique element?
A Carbon forms covalent bonds rather than ionic bonds
B Carbon has two stable isotopes, carbon-12 and carbon-13
C. Elemental carbon comes in two forms, diamond and graphite
D To a greater extent than any other element carbon can bond itself to form straight
chains, branched chains and rings
Answer:
Carbon plays a unique role among the chemical elements. ... Due to its four valence electrons, carbon is the smallest element that is able to make covalent bonds to four different atoms in its neutral form.
How does a material get a negative charge?
Explanation:
When insulating materials rub against each other, they may become electrically charged . Electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. The material that gains electrons becomes negatively charged. The material that loses electrons is left with a positive charge.
List the producers in this food web
Answer:
Tree and Grass?
Explanation:
hope it helps pleass mark me as brainliest answer
Calculate the moles in 8.85 x 1024 atoms of C.
Answer:
1. How many atoms are in 6.5 moles of zinc? 6.5 moles. 6.02 x 10. 23 atoms = atoms. 3. Convert 2.35 moles of carbon to atoms. 2.35 moles 6.02 x 10. 23.
You probably use the term heat many times a day. As an example, when you cook dinner, you heat your dinner on a hot stove. When you place a piece of cool metal in the sun, it is heated by the sun’s energy. Why is heat the correct term to use in these examples?
A. They show that when objects are touching, they are the same temperature.
B. They show that heat flows from something warmer to something cooler.
C. They indicate that heat is created to raise the temperature of something.
D. They indicate that the kinetic energy of the particles decreases when something is heated.
Answer:
c
Explanation:
If a five-cent coin is made of 25% copper and 75% Nickel, determine the mass of Nickel and Copper in the coin.
Answer:
3.75g of Ni and 1.25g of Cu
Explanation:
The five-cent coin of Unit States has a mass of 5.000g. To find the mass of each atom we have to multiply the total mass times the percentage of each atom (Nickel and Copper). That is:
Mass Nickel:
5.000g * 75% = 3.75g of Ni
Mass Copper:
5.000g * 25% = 1.25g of Cu
llodine solution is added to a sample taken from the boiling tube after 10 minutes and
60 minutes.
Suggest what you would see in these samples.
03
Answer:
I have no idea sorry but if you payed attention to what they are telling you you won't half to cheat
brainliest^^^^^^^ picture included !!
Explanation:
A. Calculating the molar mass of the ending compound.Please help will give brainless and 10 points each balance the equation
Answer:
Barium Chloride + Aluminum Sulfate = Barium Sulfate + Aluminum Chloride
Explanation:
Hopefully this helps you!!
Don't be afraid to correct me if i'm wrong! :)
what is an example of decomposition?
Answer:
Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen.
Explanation:
♡
Which element is most likely to have an oxidation number of +3?
Α. Ν
B. AI
C. Mg
D. S
Answer:
Option B because aluminum has valence 3±
BRAINLIEST!
How do the ions in metals behave?
a They are negatively charged.
b They are repelled by electrons.
c They are attracted to each other.
d They are repelled by each other.
Answer:
attracted towards each other
Explanation:
hope u like the ans
Answer:
The ions in metal behavior by repelled by electro
What is the chemical formula for Fluorine trisulfide ?
Answer:
F2O8S3
Explanation:
Convert 0.6330 mol of Na3PO4 to grams. Show the unit analysis by inserting the correct components into their unit- factor slots.
(see picture)
Answer:
No of moles = mass in gram / molar mass
Mass in gram = no of moles× molar mass
Mass in gram = 0.6330× 163.94
103.77 gram
Explanation: