Initial volume of graduated cylinder = 30.0 mL
Final volume of graduated cylinder after adding rock = 75.0 mL
Volume of the rock = Final volume of graduated cylinder after adding rock - Initial volume of graduated cylinder
= (75.0 - 30.0) mL
= 45.0 mL
Mass of the rock = 55.0 g
[tex] \rm Density = \dfrac{Mass}{Volume} \\ \\ \rm = \dfrac{55}{45} \\ \\ \rm = 1.23 \: g/mL[/tex]
[tex] \therefore [/tex] Density of the rock = 1.23 g/mL
Select the arrow that would accurately diagram this thermal energy transfer.
Hot Cold
Question 5 options:
←
↺
→
↻
Answer:
I thing the accurately diagram is =>
Answer:
→
Explanation:
i took the test
I am new I am 7 my big brother told me to get this
Answer:
cool! Welcome. On this app we help people who need help with schoolwork.
What are the similarities and differences in slurries, sols, pastes and gels?
I actually do not know the answer can I help tommorow if you are fine with it tooo sleeeepy have 14 exams tommorow have to prepare.
Sorry:(
Choose one of Rutherford’s discoveries and explain why it intrigues you. If it doesn’t intrigue you, make it up. Give me one paragraph for this (5 sentences).
Answer:
i am pooop but stink fart
Explanation:
Why are city streets so vital to the functioning of a city, as well as the people living within it?
can you help please??
Answer:
no
Explanation:
Answer:
The answer is B
What is the difference between a physical and chemical change?
Answer:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
Explanation:
this is what believe the answer is
Please help on number 6 will mark as brainliest
Answer:
Oil- nonpolar
Sugar- polar
Salt- Polar
Dish soap- It is both polar and nonpolar
Explanation:
a) so they will remain separate from molecules of a polar solvent such as water
b) Sugars are polar due to their -OH groups, and dissolve readily in water by forming many hydrogen bonds.
c)At the molecular level, salt dissolves in water due to electrical charges and due to the fact that both water and salt.
d) Soap molecules have both properties of non-polar and polar at opposite ends of the molecule.
The common charge on an atom in group 17 would be....
+1
+7
-7
-1
+17
ñ How many total electrons does 0-2 (an oxide ion) have?
Explanation:
1one electron and -1 for anions
2 O2- indicates an ion of oxygen having two extra electrons. I.e., since an oxygen atom normally has 8 protons and 8 electrons, this ion has 10 electrons (-10 charge) and 8 protons (+8 charge) giving it a charge of -2 (-10 + 8 = -2).
...
Why does the human eye see different colors?
Answer:
The human eye and brain together translate light into color. Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. ... Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors
Explanation:
i have advancedddd
PLEASE HELP!! WILL GIVE BRAINLIEST!!!!
A student was using the periodic table to organize elements based on their ionization energy from lowest to highest. At the end of the class period, the student left one of the 4 spaces blank. It looked like this:
Barium (Ba), Cobalt (Co), ______, Helium (He)
There are 4 options to fill in the blank: Antimony (Sb), Krypton (Kr), Selenium (Se), or Nitrogen (N). Which element is the correct one to fill in the blank? Explain why using the following words: ionization energy, attractive force, energy levels, distance, and protons.
Answer:
Barium (Ba), Cobalt (Co) ,Copper (Co),Helium (He)
is it Copper (Co)?
jumping on a cemented floor is more pain full than a sandy flour,why
Answer:
Is soft
Explanation:
because concrete is hard ash so t hink flour would be safer
Magnesium (24.30g) reacts with hydrogen chloride (xg) to produce hydrogen gas(2.04g) and magnesium chloride (96.90g). How much hydrogen chloride was used in the reaction
We have that for the Question,it can be said that How much hydrogen chloride was used in the reaction is
x=74.42From the question we are told
Magnesium (24.30g) reacts with hydrogen chloride (xg) to produce hydrogen gas(2.04g) and magnesium chloride (96.90g).
How much hydrogen chloride was used in the reactionHow much hydrogen chloride was used in the reactionGenerally the equation for the Reaction is is mathematically given as
Mg+2HCl-----MgCl2+H2
Grams of MgCl2=[tex]\frac{96.9*24.30}{2.04}\\[/tex]
Grams of MgCl2=1154.25g
Therefore
ON cK -12
How much hydrogen chloride was used in the reaction is
x=74.42
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why is the chemical reaction between nitric acid and sodium hydroxide called a neutralization reaction?
Answer:
Because nitric acid is acidic in nature and sodium hydroxide is basic in nature so when acid and base react they become neutral.
how many atoms are in Tetrachloroauric acid
Answer:
29 i think
Explanation:
What holds the two parts of a metal together?
S
E
A
Answer: The metal is held together by the strong forces of attraction between the positive nuclei and the delocalized electrons (The Electron Sea Model.
Explanation: I hope that helped!
an_____is a trait that a organism inherits that makes it more suited to it's natural envormemt, helping it survive
adaptation may be i guess
which process is a form of mechanical weathering?
A. carbonation
B. wedging
C. hydrolysis
D. oxidation
Answer:
Ethier a or c
Explanation:
If the half-life of Uranium-235 is 176000 years and 12.5 g of Uranium-235 remain after 704000 years, how much of the radioactive isotope was in the original sample.
The rock was white and black speckled with a density of 2.6 g/mL. Physical or chemical property?
Answer:
Chemical
Explanation:
ANSWERS PLEASE HELP
i need answers
Answer:
C. is the correct answer
Explanation:
the diagram below represents a portion of a cell membrane. The arrow indicates that the cell membrane is carrying out the process of...
Answer:
I'm feeling nice today so heres the answer
Explanation:
In the portion of the cell membrane shown in the diagram, the arrow indicates the process of active transport.
Explanation:
Active transport is one of the mechanisms of transmembrane transport, which involves the use of energy. The diagram (see image) shows the hydrogen (H⁺) output from the cytoplasm to the extracellular space, through an H⁺ pump —consuming ATP— which represents an active transport process.
The hydrophobic nature of the cell membrane prevents the free passage of hydrosoluble elements or ions, as H⁺, so they require the use of active transport to pass through it.
The other options presented are not correct, because
Respiration is a process that occurs in the mitochondria.
Diffusion is a passive transport process that does not require energy.
Cellular recognition depends on membrane proteins that act as specific receptors.
Answer:the answer is active transport
Explanation:
In this unbalanced chemical equation, which element is not conserved?
3LIOH + H3PO4 Li PO4 + 3H20
A. O
B. H
C. P
D. LI
Answer:
LI
Explanation:
There is three Li in the start but One Li after
How are the pressure and temperature of a gas related
Answer:
The pressure of a given amount of gas is directly proportional to its absolute temperature, provided that the volume does not change (Amontons's law). ... The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law).
Answer:
pressure is directly proportional to temperature at constant volume
What is the formal charge of carbon in CO?
|C≡O|
Answer:
FC of C = -1
General Formulas and Concepts:
Lewis Dot StructuresResonance StructuresFormal Charge: FC = # of valence e⁻ - # of lone e⁻ - # of bondsExplanation:
Step 1: Define
Carbon (C)
4 valence e⁻2 lone e⁻3 bondsOxygen (O)
6 valence e⁻2 lone e⁻3 bondsStep 2: FC of C
Substitute: FC = 4e⁻ - 2e⁻ - 3Subtract: FC = -1In metallic bonding, which of these particles are able to move around freely?
A.) protons
B.) electrons
C.) neutrons
Answer:
Electrons
Explanation:
They mad chillin da electron cloud.
Under what conditions can potassium bromide, an ionic compound, conduct electricity?
a
when melted or dissolved in water
b
only when it is in crystal form
c
only when melted
d
only when it is dissolved
Answer:
A
Explanation:
As do to freed atoms more able to conduct electricity in molded state which can occur if melted or dissolved
When Earth is tilted on its axis why does it orbit the sun ?
Answer:
Here
Explanation:
Some assume our planet's changing distance from the sun causes the change in the seasons. That's logical, but not the case for Earth. Instead, Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane, that is, the plane of Earth's orbit around the sun
what is the air pressure in central texas
Answer:
30.8
Explanation: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
30.08
i recommend looking at a map for these kinds of questions.
what evidence lead rutherford to propose that the atom had a nucleus?
Answer:
When he shot radiation through gold foil, some of the radiation shot back, some went directly through, and some slight angled off.
Explanation:
He knew that the radiation that had gone all the way through had not hit anything.
He knew that the radiation that came directly back must have hit a big nucleus.
He knew that the radiation that angled slightly off must have hit a smaller, orbiting particle (electrons).
