Answer:
because the minerals in the rock can't be used until they are separated
HELP PLEASE ASAAPPP!!!How many atoms of silicon would there be in a sample that contained 4.66 x 1030
grams? ANSWER CHOICES INCLUDED IN IMAGE ABOVE
Answer:
there is no image
Explanation:
can you maybe ask the question again with the image?
Answer:
put an image please i don't understand
Which example describes a chemical change
taking place?
A. water turning into steam
B. sugar dissolving in warm water
C. alcohol evaporating from a food while baking
D. nails rusting while sitting outside
What is
the commission amount on 500000 at rate of 6%
Answer:
30000
Explanation:
6/100×500000 =30000
Which list of terms best describes the formation of sedimentary rocks
Explanation:
Weathering - erosion - transportation - deposition
Sedimentary rocks are rocks that are formed from pre-existing rocks. The agents of denudation plays very important roles during the formation these rock types.
Existing rock bodies are broken down in to tiny fragments. These fragments are carried by erosion and transported. In the basin they are deposited as layers. Compaction, lithification and cementation occurs with burial. This will then lead to the formation of sedimentary rocks.How many atoms are there in 1.225 moles of iron?
Show work
Answer:
1.2 × 10 to the power 25 . atoms of iron divide by a line 6.022× iron atoms per mole =~ 20 moles
How many moles are in 4.81x10^24 atoms of boron(B) ?
Show all of your work. Include units. round your answer to the correct number of significant figures.
Answer:
7.99 moles of boron
Explanation:
Given data:
Number of moles of B = ?
Number of atoms of B = 4.81 × 10²⁴ atom
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
4.81 × 10²⁴ atom × 1 mol / 6.022 × 10²³ atoms
0.799 × 10¹ mol
7.99 moles
One can find the pH of a substance by using ___.
A. a conductivity tester
B. a thermometer
C. plain paper indicator
D. litmus paper indicator
Explanation:
C. Plain paper indicator.
Litmus paper indcator can only tell you if the solution is acidic/neutral/alkaline, but not to what extent.
Which product contains a strong base that would most likely completely dissolve in water?
drain cleaner
ammonia
baking soda
antacid
Answer:
Drain Cleaner
Explanation:
I just took the test and got it right :)
drain cleaner............................
How many grams of carbon are required to produce 0.460 moles of SiC?
SiO2 + C → SiC + CO
Answer:
Sick Core corona +iep =Qurintine
Calculate the mass of Aluminum Bromide that can be made with 5.6 moles of Aluminum
The mass of Aluminum tri bromide that can be made with 5.6 moles of Aluminum is 1,492.90 grams.
What is the relation between mass & moles?Relation between the mass and moles of any substance will be calculated by using the below equation as:
n = W/M, where
W = given massM = molar massGiven chemical reaction is:
2Al + 3Br₂ → 2AlBr₃
From the stoichiometry of the reaction, it is clear that:
2 moles of Al = produces 2 moles of AlBr₃5.6 moles of Al = produces 2 moles of AlBr₃Now mass of AlBr₃ will be calculated by using the above equation as:
W = (5.6mol)(266.59g/mol) = 1,492.90g
Hence required mass of AlBr₃ is 1,492.90g.
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MARKING BRAINLIEST!
Many processes occur in the digestive system. Which process is best classified as a physical change?
A. digestive enzymes breaking down proteins into smaller fragments
B. teeth grinding an almond into smaller pieces in the mouth
C. bacteria converting lactose into simple sugars in the intestines
D. saliva converting the starch molecules in crackers into simpler sugars
Answer:
Teeth gridning
Explanation:
BC YOUR GRINDING IT
A. 1720 kJ
B. 125.6 kJ
C. 3440 kJ
D. 4730 kJ
Answer:
Q = 3440Kj
Explanation:
Given data:
Mass of gold = 2kg
Latent heat of vaporization = 1720 Kj/Kg
Energy required to vaporize 2kg gold = ?
Solution:
Equation
Q= mLvap
It is given that heat required to vaporize the one kilogram gold is 1720 Kj thus, for 2 kg
by putting values,
Q= 2kg × 1720 Kj/Kg
Q = 3440Kj
what volume (in L) of a 3.95 M potassium chloride solution would be needed to make 325 mL of a 2.76 M solution by dilution
Explanation:
Moles of KCl in new solution = 0.325dm³ * (2.76mol/dm³) = 0.897mol.
Hence volume needed = 0.897mol / (3.95mol/dm³) = 0.227dm³ or 0.227L.
A K+ ion is similar to a Cl– ion in that they both have the same A) nuclear charge B) number of electrons C) atomic number D) number of protons
Answer:
B) number of electrons
Explanation:
The two species:
K+ and Cl- have the same number of electrons.
A neutral atom of K has 19 electrons
A neutral atom of Cl has 17 electrons
Now,
To form K+, K will have to lose an electron and then the number of electrons becomes 18
To form Cl-, Cl will have to gain an electrons and then the number of electrons becomes 18
So, therefore, the number of electrons on both species is 18
Identify and describe the steps in the technology design process.
Answer:
Steps of the technological design process include: identify a problem, research the problem, generate possible solutions, select the best solution, create a model, test the model, refine and retest the model as needed, and communicate the final solution.
Explanation:
hope it helps, please mark brainliest
Steps of the technology design process include: identify a problem, research the problem, generate possible solutions, select the best solution, create a model, test the model, refine and retest the model as needed, and communicate the final solution.
What is technology?Technology is the application of knowledge for achieving practical goals in a reproducible way.The word technology can also mean the products resulting from such efforts, including both tangible tools such as utensils or machines, and intangible ones such as software. Technology plays a critical role in science, engineering, and everyday life.
Technological advancements have led to significant changes in society. The earliest known technology is the stone tool, used during prehistoric times, followed by the control of fire, which contributed to the growth of the human brain and the development of language during the Ice Age. The invention of the wheel in the Bronze Age allowed greater travel and the creation of more complex machines. More recent technological inventions, including the printing press, telephone, and the Internet, have lowered barriers to communication and ushered in the knowledge economy.
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the law of states that mass cannot be created nor destroyed during a chemical reaction ?
a: conservation of mass
b: averages
c: conservation of momentum
d: conservation of energy
What may be the most important tool to use for collecting data when conducting an investigation into how thermal energy affects metals? goggles beaker thermometer graduated cylinder
Answer:
thermometer
Explanation:
The most important tool to use when collecting data relating to how thermal energy affects metals would be the thermometer.
The thermometer is an instrument used to measure temperatures and the temperature of a body is a measure of the amount of thermal energy present in the body.
In order to obtain data relating to how thermal energy affects metals, the most important variable to take note of would be the thermal energy of the metals and this can only be done by the thermometer.
What is an example of a congenital disorder
Answer:
down syndrome
Explanation:
Question 1
2 pts
The area around a charged object where the object can exert a force on
other charged objects is an electric
field
charge
induction
force
Answer:
A. electric field
Explanation:
took test
Answer:
electric field
Explanation:
Part A:
Identify a property of water that contributes its movement through the capillary tubes. Explain how the
molecular structure of water contributes to this property.
Plants use a similar mechanism to move water through their stems. In a specific species of plant, the
vessels are approximately 0.3 mm in diameter.
Part B:
Estimate how tall this species of plant can grow. Explain how the molecular structure of the vessels can
be modified to increase the maximum height of the plant without changing the diameter of the vessels.
Answer:
Part A
i) A property of water that contributes to its movement through capillary tubes is adhesion, which is the capacity of water to stick to other surfaces
ii) Water has a polar molecular structure as such the hydrogen present in the water molecules form bonds with the oxygen present in the silicon oxide molecules from which the capillary tube is normally made
Part B.
i) From the given graph, the function appears to have a vertical asymptote at x = 0, therefore, the plant can grow infinitely tall
ii) The molecular structure of the vessel can be modified such that the walls incorporate more oxygen molecules per mole which will increase the number and the strength of the hydrogen bond between the water molecules and the walls of the plant vessel and therefore, increase the capillary action, the water height and the maximum height of the tree
Explanation:
what is the average atomic mass of einsteinium? what are its common isotopes?
Answer:
Boom
Explanation:
The bomb is big and it goes boom and it also creates nuclear fragments everywhere
What is the difference between a molecular formula, structural formula and an electron dot formula? Give an example of each
Answer:
The molecular formula tell us what elements the atoms are, and how many moles and atoms are attributed toward each element. For example, molecular formula of glucose is . That means one molecule of glucose has 6 molecules of C, 12 molecules of hydrogen and 6 molecules of oxygen.
The structural formula of a chemical compound is a graphic representation of the molecular structure.
Electron dot diagram or a Lewis diagram or a Lewis structure.
Explanation:
What is causing the shrinking of the taiga forest biome?
Answer:
Deforestation
Explanation:
The value of softwood means that large areas of Russia's taiga have been cleared: deforestation is occurring at a rate of 12 million hectares per year (2014). As much as half of the logging in the far east of Siberia is illegal
Answer:
deforestation
Explanation:
and tectonic plates
Both the esophagus and the small intestine are involved in the digestion of food. The esophagus squeezes food into the stomach by wave-like muscle contractions. Peptidase enzymes in the small intestine break food molecules into smaller molecules.
Which statement best describes changes to food during digestion?
A. The muscle contractions result in physical changes, while the action of the peptidase results in chemical changes.
B. The muscle contractions result in chemical changes, while the peptidase results in physical changes.
C. The muscle contractions and the action of the peptidase both result only in physical changes.
D. The muscle contractions and the action in the peptidase both result only in chemical changes.
Answer:
The answer is: A
Explanation:
The wave-like contractions are to be considered a physical change as they do not take part in the breaking-down of the food. The peptidase is a chemical change because it is used to chemically break down the food to retrieve nutrients and such.
10 points- plz help me..
A science class is at a frozen lake for a field trip, and they are experimenting with hockey pucks on the ice. A student says, "If I push harder on this hockey puck when I make it slide, then it will slide faster along the ice.”
What could the student add to make the statement a hypothesis?
A: dependent and independent variables
B: proof that the statement is true
C: examples of other objects on ice
D: explanations of why the puck slides faster
Answer:
the answer is D: explanations of why the puck slides faster
Explanation:
A Girl in Brainly Banned/Removed the answer i had put the first time, Brainly claims she removed my answer because i was violating community guidelines such as cheating or plagiarism. The reason for putting my answer was because i took a test, i got it right and i want other people to take a test and get the answer right. Im trying to help:).
so katie if your reading this, try next time to mind your own business
Answer:d
Explanation:
If the sun heated our atmosphere and the molecules began to s;read apart and rise but the atmosphere was to weak to keep them down , what would happen?
DOG SKELETAL SYSTEM BONES SKELETAL TISSUE BONE CELLS SMALLEST TO LARGEST
Answer:
tissue bone cells ,bones skeletal,dog skeletal system
Explanation:
How might a collision between Neptune and Halley's Comet
affect Neptune's orbit?
Answer:
It will mess up the orbit around the sun
Explanation:
The impact of Halley's Comet with Neptune may force the asteroid to descend into Neptune's orbit, which may divert somewhat from its original path.
The collision of two heavenly bodies results in a powerful impact.
This collision might prevent Halley's Comet from continuing on its path and eventually colliding with Neptune.
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What's the balanced equation for Iron and copper (II) sulfate solution.
Answer:
2Fe + 3CuSO₄ → Fe₂(SO₄)₃ + 3Cu
Explanation:
The reactants are:
Iron = Fe
Copper (II) sulfate solution = CuSO₄
The reaction is given as:
Fe + CuSO₄ → Fe₂(SO₄)₃ + Cu
This is a single displacement reaction;
Now let us balance the equation;
aFe + bCuSO₄ → cFe₂(SO₄)₃ + dCu
Conserving Fe;
a = 2c
Conserving Cu;
b = d
Conserving S;
b = 3c
Conserving O;
4b = 12c
let b = 1;
c = [tex]\frac{1}{3}[/tex]
d = 1
a = [tex]\frac{2}{3}[/tex]
Multiply through by 3 to get whole numbers;
a = 2, b = 3, c = 1 and d = 3
2Fe + 3CuSO₄ → Fe₂(SO₄)₃ + 3Cu
the density of a substance is 4.0g/cm3 if a sample of the substance has a volume of 25cm3 what is the mass
Answer:
100 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volume
From the question we have
mass = 4 × 25
We have the final answer as
100 gHope this helps you