Answer:
The answer is
0.67 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of aluminum = 2 g
volume = final volume of water - initial volume of water
volume = 20 mL - 17 mL = 3 mL
The density is
[tex]density = \frac{2}{3} \\ = 0.6666666...[/tex]
We have the final answer as
0.67 g/mLHope this helps you
Answer:
0.67g/mL
Explanation:
The formula is [ d = m/v ] where m = mass and v = volume
Find the volume.
20 - 17 = 3
Find the density.
d = 2/3
d ≈ 0.67
Best of Luck!
While Karen was cooking dinner, she noticed that several ingredients went through chemical and physical changes. Which cooking process is an example of a physical change?
A. Boiling soup
B. Frying eggs
C. Baking cookies
D. Toasting bread
Answer: frying egg
Explanation:
his image shows the rock cycle.Which event most likely occurs at point V?
True or False.... Any person living outside of the 50 States or in Hawaii automatcially becomes an American citizen at Birth? True or False
Carbon - Mass: 20 / Atomic #: 6
How many neutrons are found ?
Answer:
its base of the number chlorine -37
Explanation:
How many electrons would Boron with a +2 charge have?
5 electrons
Boron atomic number 5 has five electrons in its ground state.
Commonly Boron will lose 3 electrons leaving 2 electrons in its most common ionic form.
Explanation:
The atomic number gives the number of protons. Protons which have a positive charge are balanced by an equal number of electrons in a neutral atom.
Boron number 5 has five protons and therefore as a neutral atom also has five electrons.
Boron has an electron configuration of
1s22s22p1
The most stable electron configuration for Boron is
1s2
+ 3 charges. By losing three electrons Boron can achieve the stable electron structure of Helium
Brainliest? :D
can protons neutrons and electrons be found on the ptoe?
The Hot-Wheel car was accelerating across the table at 0.25 meters per second squared (m/s^2) from an applied force of 10 N. What is the mass of the Hot Wheel car? *
40 grams
2.5 grams
0.025 grams
cannot be determined
Answer:
Explanation:
Consider the motion of a Hot Wheels car beginning from rest at an elevated position. The Hot Wheels car rolls down a hill and begins its motion across a level surface. Along the level surface, the Hot Wheels car collides with a box and skids to a stop over a given distance. How could work and energy be utilized to analyze the motion of the Hot Wheels car? Would the total mechanical energy of the Hot Wheels car be altered in the process of rolling down the incline or in the process of skidding to a stop? Or would the total mechanical energy of the Hot Wheels car merely be conserved during the entire motion?
Of course the answers to these questions begin by determining whether or not external forces are doing work upon the car. If external forces do work upon the car, the total mechanical energy of the car is not conserved; the initial amount of mechanical energy is not the same as the final amount of mechanical energy. On the other hand, if external forces do not do work upon the car, then the total mechanical energy is conserved; that is, mechanical energy is merely transformed from the form of potential energy to the form of kinetic energy while the total amount of the two forms remains unchanged.
While the Hot Wheels car moves along the incline, external forces do not do work upon it. This assumes that dissipative forces such as air resistance have a negligible affect on the car's motion. This is a reasonable assumption for the low speeds of the car and its streamline characteristics. Since external forces do not do work on the car, the total mechanical energy of the car is conserved while moving along the incline. As the work-energy bar charts in the animation below depict, energy is transformed from potential energy (the stored energy of position) to kinetic energy (the energy of motion). The car gains speed as it loses height. The bar chart also depicts the fact that the total amount of mechanical energy is always the same; when the two forms are added together, the sum is unchanging.
When the Hot Wheels car collides with the box and skids to a stop, external forces do a significant amount of work upon the car. The force of friction acts in the direction opposite the car's motion and thus does negative work upon the car. This negative works contributes to a loss in mechanical energy of the car. In fact, if 0.40 Joules of mechanical energy are lost, then -0.40 Joules of work are done upon the car. As this work is done, the mechanical energy of the car (in the form of kinetic energy) is transformed into non-mechanical forms of energy such as sound and heat.
In n=6 the correct sequence for filling of electron will be
Answer:
If n=6, the correct sequence for filling of electrons will be ns→(n−2)f→(n−1)d→np
Results that would support your hypothesis? Please help me, This is over due.
My hypothesis is “If coffee makes you shorter than maybe you should lower your coffee intake because it could affect your height”?
Answer:
doesn’t make sense coffee couldn’t make you shorter , yes it might stop you from growing but it doesn’t shrink your body.
Explanation:
Because coffee is made out if coffee beans and has caffeine but theres just no possible way that’s even a question.
is mineral oil ionic or covalent
Answer:
Iconic
Explanation:
hope this helps :) x
Are the effects of adding heat reversible
Answer:
yes they are
Explanation:
if you are heating up glass i believe not, unless you want to break the glass. Making glass go from high to low or low to high tempuatures quickly will cause it to break. How ever metal will be stronger as long as you dont bend it.
4. How many grams would 2.5 moles of magnesium
(Mg) weigh?
Answer:u would have 30 grams in it
Explanation:cause u have 12 grams in each mole
An igneous rock has a coarse texture and is dark in color. How else can this rock be accurately described?
small crystals
cooled quickly
produced from magma
formed at Earth’s surface
Answer:
B- cooled quickly
Explanation:
credit to the person above me :)
An igneous rock has a coarse texture and is dark in color. The rock can be accurately described as cooled quickly.
What are rock?Rock are defined as a natural substance made up of crystalline crystals of various minerals fused together to form a solid mass.
It is also defined as any naturally occurring mineraloid substance or solid bulk.
There are basically three types of rock.
Igneous rock - It is defined as rocks arise from magma, a molten mixture of rock-forming minerals and frequently volatiles such as gases and steam. Metamorphic rock - It is defined as those created by modifications in preexisting rocks caused by high temperature, pressure, and chemically active fluids.Sedimentary rock - It is defined as a materials deposited and lithified near the Earth's surface by rushing water, wind, ice, or living creatures.Thus, an igneous rock has a coarse texture and is dark in color. The rock can be accurately described as cooled quickly.
To learn more about rock, refer to the link below:
https://brainly.com/question/19930528
#SPJ5
Two pieces of the same metal or placed on the table with the piece of metal have the same density mass and texture which characteristic must be the only difference between the two samples
A-they contain a different amount of matter per unit volume
B-they have different dimensions
C-they are made up of a different type of matter
D-they have different boiling points
Answer:
B-they have different dimensions
Explanation:
It was explicitly stated in the question that the both samples are exactly pieces of the same metal. If that is so, pieces of the same metal must have the same density, contain the same quantity of matter, have the same boiling point and have the same amount of matter per unit volume.
However, the two pieces of metal may have different dimensions.
How do you write the electron notation and orbital fill notation for calcium?
explain the parts of a cell.
Answer:
Nucleus
The nucleus can be thought of as the cell’s headquarters. There is normally one nucleus per cell, but this is not always the case, skeletal muscle cells, for instance, have two. The nucleus contains the majority of the cell’s DNA (a small amount is housed in the mitochondria, see below). The nucleus sends out messages to tell the cell to grow, divide, or die.
Plasma membrane
To ensure each cell remains separate from its neighbor, it is enveloped in a special membrane known as the plasma membrane. This membrane is predominantly made of phospholipids, which prevent water-based substances from entering the cell. The plasma membrane contains a range of receptors, which carry out a number of tasks, including being:
Gatekeepers: Some receptors allow certain molecules through and stop others.
Markers: These receptors act as name badges, informing the immune system that they are part of the organism and not a foreign invader.
Communicators: Some receptors help the cell communicate with other cells and the environment.
Fasteners: Some receptors help bind the cell to its neighbors.
Cytoplasm
The cytoplasm is the interior of the cell that surrounds the nucleus and is around 80 percent water; it includes the organelles and a jelly-like fluid called the cytosol. Many of the important reactions that take place in the cell occur in the cytoplasm.
Lysosomes and peroxisomes
Both lysosomes and peroxisomes are essentially bags of enzymes. Lysosomes contain enzymes that break down large molecules, including old parts of the cells and foreign material. Peroxisomes contain enzymes that destroy toxic materials, including peroxide.
Cytoskeleton
The cytoskeleton can be considered the scaffolding of the cell. It helps it maintain the correct shape. However, unlike regular scaffolding, the cytoskeleton is flexible; it plays a role in cell division and cell motility — the ability of some cells to move, such as sperm cells, for instance.
The cytoskeleton also helps in cell signaling through its involvement in the uptake of material from outside the cell (endocytosis) and is involved in moving materials around within the cell.
Endoplasmic reticulum
The endoplasmic reticulum (ER) processes molecules within the cell and helps transport them to their final destinations. In particular, it synthesizes, folds, modifies, and transports proteins.
The ER is made up of elongated sacs, called cisternae, held together by the cytoskeleton. There are two types: rough ER and smooth ER.
Golgi apparatus
Once molecules have been processed by the ER, they travel to the Golgi apparatus. The Golgi apparatus is sometimes considered the post office of the cell, where items are packaged and labeled. Once materials leave, they may be used within the cell or taken outside of the cell for use elsewhere.
Mitochondria
Often referred to as the powerhouse of the cell, mitochondria help turn energy from the food that we eat into energy that the cell can use — adenosine triphosphate (ATP). However, mitochondria have a number of other jobs, including calcium storage and a role in cell death (apoptosis).
Ribosomes
In the nucleus, DNA is transcribed into RNA (ribonucleic acid), a molecule similar to DNA, which carries the same message. Ribosomes read the RNA and translate it into protein by sticking together amino acids in the order defined by the RNA.
what's the chemistry?
Answer:
Chemistry is another word for science just higher level.the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.
Explanation:
Answer:
Chemistry is a branch of science.
say hi to everyone
Answer:
Hi.
Explanation:
I like turtes.
Answer:
Hi everyone
Explanation:
24. a. Suppose different parts of a sample material
have different compositions. What can you
conclude about the material?
(1-2)
Answer:
One can conclude that the metal is an alloy.
Explanation:
An alloy is a combination of metal that has two or more elements. Different metals are usually combined to give it more strength or make it more resistant to corrosion.
Cheers!
The simple unit of a compound
Answer:
the basic unit of an ionic compound is called a formula unit and the basic unit of a covalent compound is a molecule.
Please help with my chemistry homework
Answer:
amu, atomic number, electrons, atomic mass
Explanation:
The standard unit of radiation related to biologic hazard is known as the .
Answer:
the standard unit of radiation related to biological hazards is known as the Roentgen.
Explanation:
An aspirin tablet has 300mg of active ingredient. How many grams does that
equal?
Answer:
0.3 grams
Explanation:
you need to convert mg to m, and in doing so, multiply your 300mg by 1000
Hope this helps
Changing a solid to a liquid to a gas is changing the
matter.
*
Your answer
Answer:
i could help you can you explain more plzzzzzz i really need points
Explanation:
Answer:
It is changing the state of matter.
How many atoms in 19.6 grams of sodium? Full number please not the expression of ### times ###^##
Answer:
Number of atoms = 5.1345 x 10²³
Explanation:
Given:
Mass of sodium = 19.6
Find:
Number of atoms
Computation:
We know that atomic mass of sodium is 22.98
So,
Number of atoms = [Mass of sodium/atomic mass of sodium]Avogadro's number
Number of atoms = [19.6 / 22.98]6.02 x 10²³
Number of atoms = 5.1345 x 10²³
What is the density in g/cm3 of a rectangular prism whose sides measure 10cm x 1cm x 2 cm and has a mass of 240g?
Answer:
12 g/cm³
Explanation:
From the question given above, the following data were obtained:
Dimension = 10 cm × 1 cm × 2 cm
Mass = 240 g
Density =.?
Next, we shall determine the volume of the rectangular prism. This can be obtained as follow:
Volume = 10 cm × 1 cm × 2 cm
Volume = 20 cm³
Finally, we shall determine the density of the rectangular prism as follow:
Mass = 240 g
Volume = 20 cm³
Density =.?
Density = mass /volume
Density = 240 /20
Density = 12 g/cm³
Therefore, the volume of the rectangular prism is 12 g/cm³.
What affects the direction of the current
Answer:
direction of the wire moves in and the direction of magnetic field.
How are electrons arranged around the nucleus of an atom
Answer: electrons are arranged in shells around an atom's nucleus.
Explanation:
The energy of the motion of the particles in the matter
2 points
Heat
Potential Energy
Thermal Energy
Total Internal Energy
Kinetic energy
How long will it take a piece of strontium-90 (produced in a nuclear test blast) weighing exactly 1000.0 g to be
reduced to 15.625 g? The half-life of strontium 90 is 28.8 years,
Answer:
Time taken 172.8 years
Explanation:
Given data:
Total amount of strontium-90 = 1000.0 g
Amount left = 15.625 g
Half life of strontium = 28.8 years
Time taken = ?
Solution:
Number of half lives:
At time zero = 1000.0 g
At first half life = 1000.0g/2 = 500 g
At second half life = 500 g/2 = 250 g
At third half life = 250 g/ 2 = 125 g
At 4th half life = 125 g/ 2= 62.5 g
At 5th half life = 62.5 g/2 = 31.25 g
At 6th half life = 31.25 g / 2 = 15.625 g
Time taken:
Time taken = number of half lives × half life
Time taken = 6×28.8 years
Time taken = 172.8 years
