Given parameters:
Density of the rock = 2.2g/cm³
Volume of rock = 66.5mL
Unknown:
Mass of the rock = ?
Solution:
Density is the mass per unit volume of a body. It is mathematically expressed as shown below;
Density = [tex]\frac{mass}{volume}[/tex]
So;
Mass = Density x Volume
We need to take the given parameters to the same unit before we solve;
convert mL to cm³
1mL = 1cm³; 66.5mL is the same as 66.5cm³
Now solve;
Mass = 2.2 x 66.5 = 146.3g
The mass of the rock is 146.3g
A volume is measured experimentally as
4.09 mL. What is the percent error, given
that the correct value is 4.13 mL?
Answer in units of %.
Answer:
The answer is 0.97 %Explanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
From the question
actual volume = 4.13 mL
error = 4.13 - 4.09 = 0.04
We have
[tex]p(\%) = \frac{0.04}{4.13} \times 100 \\ = 0.968523002...[/tex]
We have the final answer as
0.97 %Hope this helps you
Each B atom is adjacent to 2 A atoms and 2 B atoms. What is the B-C-B angle ?
Answer:
120 degrees
Explanation:
The molecule has trigonal bipyramidal geometry. The angle between B molecules is 120 degrees. The angle between A and B molecules is 90 degrees.
The bond angle of B-C-B is equal to 120° as the given geometry of the molecule is trigonal bipyramidal.
What is the trigonal bipyramidal geometry?The trigonal bipyramid formation in chemistry is a molecular geometry in which one atom is at the center and 5 more atoms are at the corners molecular structure.
The bond angles of this geometry surrounding the central atom are not identical because there is no geometrical arrangement with five terminal atoms in equivalent positions. For example, this molecular geometry is PF₅, PCl₅ in the gas phase.
In PCl₅, the P atom shares a plane with three Cl atoms at 120° angles to each other in equatorial positions, and two more Cl atoms above and below the plane or at axial positions. An axial atom has three neighboring equatorial atoms at a 90° bond angle.
In the given figure, the B-C-B is present at the equatorial plane of the molecule. The angle between the bonds at the equatorial plane is 120°. Therefore, the angle of B-C-B is equal to 120°.
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Manny designs an experiment to learn about erosion. First, he sets up three long trays with equal-sized piles of sand at one of each tray. Then he sets up Tray A so that it lays flat on a table. He elevates the end of Tray B that holds the sand by 5 cm. Next, he elevates the end of Tray C that holds the sand in each tray. Finally, he observes and measures how far sand is carried by the way water poured into each tray.
Answer:
Height of tray
Explanation:
it is difficult to press the football in water why?
Answer:
The ball you want to submerge displaces the water occupied in the ball's volume. ... In water the concrete has a buoyancy pressure force equal to the displaced liquid's weight and weighs only 120 pounds until it reaches the surface.
Explanation:
electron configuration of P
3
In which of the following states of matter are the particles very far apart so they can fill their containers?
A.
gases only
ОВ.
solids, liquids, and gases
solids and liquids only
C.
D.
solids only
Reset
Submit
Answer:
A. gases only
Explanation:
It is only in gases that the particles are very far apart so they can fill their contains.
There are four major states of matter which solid, liquid, gases and plasma.
Particles of a gas have very weak attractive forces between them. They do not have fixed volume nor shapeThey easily fill up any containers they are put into. Gases are compressible and moves randomly in a straight line. Liquids and solids do not fill up containers. Liquids although have weak forces but they are better attracted than gases. Solids have fixed and definite volume.So, option A is the perfect answer.
Which of the following is the correct Lewis Dot Structure for N2?
PHOTO ABOVE
please help I got it wrong so is not D
The correct Lewis Dot Structure for Nitrogen is structure C. Therefore, option C is correct.
What is lewis dot structure ?The valence shell electrons in a molecule are depicted in an extremely simplified manner by a Lewis Structure. It is used to demonstrate how the electrons in a molecule are positioned around particular atoms.
Gilbert N. Lewis, who first described it in his 1916 article The Atom and the Molecule, gave the Lewis structure its name. Lewis structures add lines between atoms to represent shared pairs in a chemical bond, extending the idea of the electron dot diagram.
In Nitrogen molecule, every nitrogen atom has five valence electrons and there is a triple bond between the two nitrogen atoms. Thus, the correct lewis dot structure is; :N⋮⋮N: .
Thus, option C is correct.
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How do the lines of the brain and the neurons work together to communicate
Lewis Dot structure for N2?
PHOTO ABOVE
Is not D I got it wrong
Answer: C
Explanation:
The N2 should have a triple bond because it needs three covalent bonds to fill its outer shell. This means the two atoms need to share three electrons each.
It also serves as a nice illustration of a triple-bonded molecule. For the Lewis structure of N2, there are ten accessible valence electrons. Therefore, option C is correct.
What is lewis structure ?The diagrams known as Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.
It contradicts the octet rule, as shown by the production of molecules, and could not account for the release of energy during the formation of covalent bonds.
The three parallel lines between the N atoms represent three bonds. This is a triple bond, with one electron from each N atom contributing to each bond. A total of 6 electrons are thus represented by this triple bond.
Thus, option C is correct.
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What does the chemical formula CaCl, show about the compound it represents
where might u find examples of series & parallel circuits in everyday life
Answer: Here are some examples!
Explanation: An example of a series circuit is a string of Christmas lights. If any one of the bulbs is missing or burned out, no current will flow and none of the lights will go on. Parallel circuits are like the smaller blood vessels that branch off from an artery and then connect to a vein to return blood to the heart.
anywhere inside ur house lma.o.
sketch a heating curve for water at 101kPa
using the information from the phase diagram. Label the melting point and
boiling point temperatures on your heating curve
Answer:
Please find attached a sketch of the heating curve of water at atmospheric pressure ( approximately 101 kPa) as traced from an online source
Explanation:
Given that the pressure at 101 kPa is approximately 1 atmosphere, we have;
The melting point and the boiling point occurs at approximately 0°C and approximately 100°C, respectively;
The melting point and the boiling point experience latent heat, therefore that temperature remains the same, though heat is continuously added
Also, given that the latent heat of vaporization (22.6 × 10⁵ J/kg) is approximately 7 times the latent heat of fusion is (3.33 × 10⁵ J/kg), the length of the plateau representing evaporation would be approximately 7 times longer than the length representing fusion.
The heating curve obtained from an online source for water at atmospheric pressure, is presented in the attached sketch.
One day, you ride your bike to a local bookstore. You purchase a few of your favorite comic books, put them in your backpack, and ride home. Once you get home, you sit in a rocking chair and read your comic books. Which resource in this scenario is nonrenewable?
O the steel frame used to make the bike.
O the paper used to make the comic books.
O the cotton used to make the backpack.
O the wood used to make the rocking chair.
A non-renewable also know as a finite resources are those resources whose availability is limited and can diminish is not used in a proper manner.
Eg:- fossil fuels, crude oil/petroleum, natural gas, and nuclear fuels.
Explanation:
Renewable resources are those resources that can be repeatedly used and cannot run out of stock as they are naturally replaceable.
Eg:-Wood,Paper,Cotton
Among the options mentioned in the above question steel is not a renewable resource. Steel is made up of iron ,which is mined from the ground.
Brainliest?
The statement is "the steel frame used to make the bike."
What is non-renewable resourceA non-renewable resource is one that cannot be replenished by natural processes at a rate fast enough to keep up with use. Carbon-based fossil fuels are an example.
Metals are essential and valuable resources in general. Metals are extremely recyclable and reusable, despite the fact that their natural supply or the supply of components used to make diverse alloys are set.
Steel is created from iron, a nonrenewable resource.
Hence the correct option is A.
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how many atoms does a gold bar and gold nuggets contain
Answer:
The answer is 1
Explanation:
Gold is gold, the size doesn't change what it is.
how many grams of potassium nitrate are required to prepare 3.00 x 10^2 mL of 0.750 M solution
Answer:
Mass = 22.725 g
Explanation:
Given data:
Mass of potassium nitrate required = ?
Volume of solution = 3.00 ×10² mL
Molarity of solution = 0.750 M
Solution:
Formula:
Molarity = number of moles of solute / L of solution
Now we will convert the volume into L.
3.00 ×10² mL × 1L /1000 mL
0.003 ×10² L or 0.3 L
now we will put the values in formula.
0.750 M = n / 0.3 L
n = 0.750 M × 0.3 L
M = mol/L
n = 0.225 mol
Mass of potassium nitrate:
Mass = number of moles × molar mass
Mass = 0.225 mol × 101 g/mol
Mass = 22.725 g
how many of protien consumed by humans around the world is fish?
a) 5 percent
b)20percent
c)4p percent
d)50 percent
The answer would be 20% (B)
The Rocky Mountains run parallel to the western coast of the United States. While parts of the California coast are lush and tropical, the area just east of the mountain range is a dry desert. What BEST explains the drastic climate difference between these two adjacent areas?
Answer:
The mountains cause rainfall.
Explanation:
The fact that the mountains run parallel to the coast is the key in the difference in climate between the two areas. Since they are parallel to the sea, they block the wind and moisture coming from the sea towards the land, the mountains cause this air to rise and when it hits the cold air at higher altitudes, it results in rain. This leads to the lush and tropical areas whereas without the parallel mountains to the coast, the amount of rain the area receives decreases, resulting in a desert like environment.
I hope this answer helps.
Can someone please explain to me how I’m supposed to figure out the element with these configurations??
Convert 20 cals to J
Answer: 83.68 J
Explanation:
1 cal=4.184 J
1×20=4.184×20
20cals=83.68 J
Decreasing the volume of a gas increases the pressure of the gas. .
Answer:
False.
Explanation:
If the gas is leaving it cannot have higher pressure.
The outer most energy level of the electron cloud is referred to as the Valence Shell.
O True
O False
A particle that orbits the nucleus in an atom is called a(n)
electron
proton
neutron
Which of the following is not a genetic trait?
Dimples
Hair length
Height
Hair Color
Answer:
I honestly think is hair length
What is the causes of gaseous
pressure ?
is salt always soluble is water?
For example, salts of sodium, potassium and ammonium are usually soluble in water. Notable exceptions include ammonium hexachloroplatinate and potassium cobaltinitrite. Most nitrates and many sulfates are water-soluble
Answer:
Many ionic compounds exhibit significant solubility in water or other polar solvents. Unlike molecular compounds, salts dissociate in solution into anionic and cationic components. For example, salts of sodium, potassium and ammonium are usually soluble in water.Explanation:
Hope this helpsWhich process is represented by this diagram?
Answer:distillation
Explanation:
The process represented by the diagram is chromatography.
What is chromatography?
Chromatography is a separation technique used to separate components present in a mixture.It makes use of two phases the stationary phase and mobile phase .
Stationary phase is a phase in which the mixture components to be separated is loaded. Mobile phase is a phase which is run over the stationary phase so as to enables components of mixtures to separate.
Separation of components is based on the principle that components of mixture which are soluble in mobile phase travel large distances over stationary phase while those which are insoluble or less soluble travel less distances over stationary phase.
For every component which is separated, a Rf value can be calculated which is simply ratio distance traveled by solute divided by distance traveled by solvent front.
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Which group has the highest ionization energies? Explain why.
Answer:
nobel elements (gr. 18) because they are fully stable due to octet complete--------------------------------------------------
Find the average atomic mass of Boron.
Boron comes in two isotopes, Boron-10 and Boron-11. Boron-10 has an exact mass of 10.01294 and has a percent abundance of 19.83%. Boron-11 has an exact mass of 11.00931 and a percent abundance of 80.17%.
Answer:
12
Explanation:
Answer:
11.01
Explanation:
just did the assignment :D
The mass of a block is 12 g and the volume is 6 ml. Calculate the density of the block. (science)
Answer:
The answer is 2.0 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass = 12 g
volume = 6 mL
We have
[tex]density = \frac{12}{6} \\ [/tex]
We have the final answer as
2.0 g/mLHope this helps you
Answer:
2.0 G/ML
Explanation:
PLEASE HURRY WILL MARK BRAINLIEST
Which number line shows the graph of x 11?