A cube has a mass of 9 grams and each side is 3 cm3. What is the density of the sample?
a.0.33 g/mL
b.36g/mL
c.3g/mLd.18g/mL
Im begging someone to help, Ill mark brainlist!!!
Answer:
a. 0.33 g/mL
Explanation:
We already know what the mass is (9 grams) so we have to find the volume of the cube next.
Volume = lwh
=(3)(3(3)
= 27
To find density, you have to find mass/volume
density = mass /volume
density = 9 g /27 mL (cm 3 and mL are basically the same thing)
= 0.33 g/mL
What is convection?
a Transfer of heat through objects touching the source
b Transfer of heat through direct physical contact
c Transfer of heat through electromagnetic waves
d Transfer of heat through the movement of particles
A student obtains two strips of magnesium, Mg, ribbon that are each 3 cm long. One strip of magnesium is placed in a test tube containing 5 mL of water, and the other strip is placed in a test tube containing 5 mL of hydrochloric acid, HCl. Both liquids are at room temperature. The student’s observations are recorded in the table.
Which statement is NOT supported by the student's observations?
Question 5 options:
A chemical reaction takes place between magnesium and hydrochloric acid.
A gas is released in Test Tube 2.
The substances in both test tubes are reactive only at high temperatures.
Energy is released in the reaction involving hydrochloric acid.
Answer:
The substances in both test tubes are reactive only at high temperatures.
Explanation:
Bubbling occurs in test tube 2, which is a sign of a chemical change. Hope this helps.
Answer:
C)The substances in both test tubes are reactive only at high temperatures.
Explanation:
I did the test.
=:)
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Is mass conserved when 10 g of sodium hydroxide undergoes a chemical change during an interaction with 57 g of copper sulfate? Use complete sentences to support your answer by explaining how this can be demonstrated.
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please use complete sentences for the answer/an explanation, i'm confused on this questionn v( ‘.’ )v ...
Answer:Instead of “theory” scientists use the word hypothesis to describe a possible explanation for a scientific mystery. Theories in science are hypotheses that.
Explanation:
When complete, the lab report should be read as a coherent whole. Make sure you connect different pieces with relevant transitions. Review for proper grammar, spelling, punctuation, formatting, and other conventions of organization and good writing.
Answer: you need to specificlly write down what you did for your lab report and do what all of thet stuff says to do
Explanation:
Answer:
So I went threw the student guide and read it carefully. Then I went threw the walk threw with the teacher and the step by step guide to get the lab done. when did multiple test an example is the height of the track and we did multiple times on that height to see it the results where same or had little difference. As I went threw it I recorded the data because I was asked to. then i filled out the questions for the lab!
Explanation:
just did it hope it helps future people
What is this natural process of particles (gases, liquids, and solids – when melted) going from a higher concentration to a lower concentration?
Answer:
This is by diffusion.
Explanation:
The slideshow describes what happens. Diffusion in liquids is slower than diffusion in gases because the particles in a liquid move more slowly. It happens faster if the temperature is increased
What effect does heat have on a chemical reaction?
Answer:
Particles can only react when they collide. If you heat a substance, the particles move faster and so collide more frequently. That will speed up the rate of reaction. ... The rate of reaction will probably have doubled for that increase in temperature - in other words, an increase of about 100%.
HOPES IT HELPS
Electromagnetic waves do not need to carry blank. Electromagnetic waves carry enough through matter, but they also carry enough energy through empty blank in a vacuum.
Answer: what? whats the quiestion?
Explanation:
What is the affect of this
A wave enters a new medium at an angle far from 90 degrees with the boundary between the two media.
Answer:
Explanation:
Your answer should be in the attached pdf
2. Record your observations about what happens to a wave when it reaches the boundary between two media.
the wave bounces back off the first media and returns to it origanal resting place
Explanation:
What is the effect on this???
A wave is transmitted into a medium where it moves faster, and then back into a medium where it moves slower again.
Pls help me I don’t understand it’s for my science class.
Plz check if correct and tell me wether each is element or compound
Answer:
sureeee
Explanation:
Which is one factor of rock types that affects the rate of weathering?
porosity
moisture
temperature
mineral color
Answer:
B
Explanation:
got it right on edge
Answer:
Its A porosity
Explanation:
✎11. How does changing the Amplitude affect the wavelength?
The chemical formula for hydrogen peroxide is H2O2. What is the total number of atoms in 1 molecule of hydrogen peroxide?
Answer:
THE TOTAL NUMBER OF ATOMS IN 1 MOLECULE OF HYDROGEN PEROXIDE ARE 4 ATOMS.Explanation: 1 molecule of hydrogen peroxide contains 2 hydrogen atoms and 2 oxygen atoms.I HOPE THAT THIS ANSWER HELPS YOUThe chemical formula for hydrogen peroxide is H₂O₂. The total number of atoms in 1 molecule of hydrogen peroxide is four atoms. Two atoms of hydrogen and two atoms of oxygen.
What is hydrogen peroxide ?Chemically, hydrogen peroxide has the formula H₂O₂. It is a somewhat more viscous liquid than water, and very pale blue when it is pure. For consumer use, it is typically diluted in water and used as an oxidant, bleaching agent, and antiseptic. For industrial use, larger concentrations are utilized.
Hair bleaching, surface cleaning, and tool disinfection are all done using hydrogen peroxide. It is also utilized in gardening and dental hygiene.
Two hydrogen and two oxygen atoms make up one molecule of H₂O₂. Therefore, two molecules of H2O2 contain four hydrogen and four oxygen atoms each. Two hydrogen atoms and one oxygen atom make up a water molecule.
Thus, The total number of atoms in 1 molecule of hydrogen peroxide is four atoms.
To learn more about hydrogen peroxide, follow the link;
https://brainly.com/question/12058172
#SPJ2
In a balanced chemical equation,
A. atoms are conserved.
B. coefficients are equal.
C. molecules are equal.
D. energy is not conserved.
help pleaseee i will give brainliesttt
Answer:
The Answer is A
Explanation:
Please let me know if I am wrong
Elements in the same period have _____.
-the same number of protons
-the same number of electron shells
-similar properties
-the same number of electrons
Ans: Elements in the same period have the same number of electron shells.
What happens in a landslide?
Water moves into an area where it does not belong.
Earth materials that are no longer held by friction move down a slope.
The upper region of a hill becomes built up by rocks.
Soil washes away into a stream.
(This is science)
What is a real world application of understanding the difference between prokaryotic cells and eukaryotic cells?
Being able to identify them with your naked eye
Differentiating between animal and human cells.
Understanding the treatments casued by different infections.
Being able to identify bacterias habitat.
Answer:
FIRST ONE
Explanation:
Which statement is true regarding kinetic energy and potential energy?
Both kinetic energy and potential energy rely on motion.
Both kinetic energy and potential energy are stored energy.
Potential energy relies on motion, while kinetic energy is stored energy.
Kinetic energy relies on motion, while potential energy is stored energy.
Answer: kinetic energy relies on motion, while potential energy is stored energy.
Explanation:
Brainstorm as many causes as you can for the phenomenon that waves seem to change direction as they approach the shore.
Answer:
As a wave moves into shallow water, its orbitals “feel the bottom,” causing it to slow down. you will see a sea of red tail lights in front of you: the cars in front of you are all Why does the wavelength of waves change as they approach a beach direction, so at any given spot in the ocean, waves are typically coming from
Explanation:
I hope I help :)
1. compare and differentiate weathering and erosion 2. give one example of weathering and one example of erosion that we may observe in our environment every day .
Answer:
1.weathering is the action were a rock starts breaking off or worn out erosion is by natural causes like wind.
2. weathering if your every near a cliff or a mountain you might see rocks falling of
erosion would be if you ever come by a rock a plant my grow inside of it and start breaking
Explanation:
i might have gotten #2 mixed up with weathering and erosion but you could see more answers
What is the effect
A wave enters a new medium perpendicular to the boundary between the two media.
Answer:
something that is produced by an agency or cause; result; consequence: Exposure to the sun had the effect of toughening his skin. power to produce results; efficacy; force; influence: His protest had no effect.
Refraction is the change in direction of propagation of a wave when the wave passes from one medium into another, and changes its speed. Light waves are refracted when crossing the boundary from one transparent medium into another because the speed of light is different in different media.
Explanation:
hope the answer was helpful...
A GFCI is an example of what kind of electrical safety device?
A.a frayed cord
B.a lightning rod
C.a parallel circuit
D.a circuit breaker
Answer:
Circuit breaker.
Explanation:
general properties shared by all waves.
Answer:
All kinds of waves have the same fundamental properties of reflection, refraction, diffraction and interference, and all waves have a wavelength, frequency, speed and amplitude.
Draw a wave with a wavelength of six units
Answer:
There ya gooo.
Explanation:
Answer:
Explanation:
How am I supposed to draw something in text? Oh, I know! _/\_/\_/\_/\_/\_/\_
Where is one example of where a Volcanic Neck exists on earth
Answer:
Puerto rico and Cabezon Peak
Explanation:
sixty percent of all active volcanoes occur at the boundaries between tectonic plates. Most volcanoes are found along a belt, called the “Ring of Fire” that encircles the Pacific Ocean. Some volcanoes, like those that form the Hawaiian Islands, occur in the interior of plates at areas called “hot spots.”
Hope this helped!
Will give brainliest :) please help :(
Answer:
Rapid deforestation can led to a drastic increase in pollution and the amount of co2 in the air. To reduce the effects, try planting more trees or just pollute less.
Explanation:
Rapid deforestation can led to a drastic increase in pollution and the amount of co2 in the air. To reduce the effects, try planting more trees or just pollute less.
Explanation:
Which evidence is an indication that a chemical reaction has occurred?
A)formation of a gas
B)melting of a substance
C)boiling of a substance
D)freezing of a substance
1. If the frequency of a wave increases from 2 Hz to 4 Hz without the wavelength changing, how will the wave speed change? PLS HELP!!!! WILL MARK BRAINLIST!!!!!!!
Answer:
biraz naruto izle
Explanation:
