Answer:
if he drops them some where there is no air they will both land at the same time as they have no air resistance and gravity pulls every item equally but if they just do it of a building in the middle of the street then the baseball would hit first as it has a larger mass
Explanation:
Who is the intended audience?
Answer:
From Middle school to college
18.Which shows chemical weathering?
A. Rocks are dissolved by acid.
B. Rocks are irregularly shaped.
C. Rocks are broken into pieces.
D. Rocks are changed into finer particles.
19. How long does it take for the moon to rotate on its axis?
A. 12 days
B. 20 days
C. 15 days
D. 28 days
20.Why is the moon important to human beings?
A. It help farmer know the right time to plant crops.
B. It makes planet earth beautiful.
C. It makes the earth climates bearable.
D. It makes earth a more livable planet and stay in its axis.
22.Which statement is NOT true?
A. Stars differ in size.
B. Red stars are the hottest star.
C. The sun is a medium sized yellow star.
D. Supernovas are exploding stars.
24.What is the effect of the northeast monsoon in the country?
A. Brings rainfall.
B. Cold weather and little rainfall.
C. No rainfall and cold weather.
D. Little rainfall and warm weather.
Explanation:
18 A
19 C
20 C
22 A
24 B
hope this helps you.
How are physical changes related to state of matter changes?
Answer:
Changes of state are physical changes. They occur when matter absorbs or loses energy. Processes in which matter changes between liquid and solid states are freezing and melting. Processes in which matter changes between liquid and gaseous states are vaporization, evaporation, and condensation.
hope this helped
What did Fermi mean when he said, "The reaction is self-sustaining"?
The reaction reached critical mass.
A spontaneous chain reaction had been accomplished.
The nuclear reaction was out of control.
The nuclear reaction could be controlled and maintained.
Answer:
The nuclear reaction could be controlled and maintained.
Explanation:
People had initiated a self-sustaining nuclear reaction--and then stopped it. He had released the energy of the atom's nucleus and controlled that energy.
Fermi's achievement in setting off the first self-sustaining nuclear chain reaction from his design of an atomic pile led to a new Age of the Atom. The controlled release of nuclear energy was now a reality
1) Is a moth bursting out of cocoon a chemical or physical change? (I put chemistry because i didn't know what else to put) 2) Is playing with purple and green slime chemical or physical change
Answer:
1)A moth bursting out of a cocoon is neither a chemical or physical change, it's a biological change. If I had to chose it would be a physical change though. Not to sure...
2)Playing with slime is a physical change.
Explanation:
1)The reason why I would chose physical change is because the moth is changing it's physical state more than it's chemical composition, but you should say both if that's an option.
2)A physical change is when the temperature, shape, or state of matter changes. A chemical change occurs when the actual substance changes. An example of this is a chemical reaction. Because the slime is changing shape and not substances, I would say that it's obviously a physical change.
Hope this helps, sorry that I'm not too sure about the 1st question.
What is the molarity of a solution that contains 114.4g NaCl (molar mass= 58.44 g/mol) in 1.2 L solution?
Answer:
1.6 M.
Explanation:
We want to find the molarity of a solution that contains 114.4 g NaCl in a 1.2 L solution.
Recall that molarity is given by:
[tex]\displaystyle \text{M} = \frac{\text{ mols solute}}{\text{ L soln.}}[/tex]
Convert 114.4 g NaCl to mol NaCl using its molecular weight:
[tex]\displaystyle 114.4 \text{ g NaCl} \cdot \frac{1 \text{ mol NaCl}}{58.44 \text{ g NaCl}} = 1.958\text{ mol NaCl}[/tex]
Therefore, the molarity of the solution will be:
[tex]\displaystyle \text{M} = \frac{1.958 \text{ mol NaCl}}{1.2\text{ L soln.}} = 1.6 \text{ M}[/tex]
In conclusion, the molarity of the solution is 1.6 M.
Which is a characteristic of an atom?
Atoms are the largest unit of matter.
Atoms can be seen by the naked eye.
Atoms come in different varieties.
Atoms are created in the Earth’s core.
Answer:
its atomic number
Explanation:
which is defined as the number of units of positive charge (protons) in the nucleus. For example, if an atom has a Z of 6, it is carbon, while a Z of 92 corresponds to uranium.
What happens to the molecules of Nitrogen as it goes through deposition?
PLEASE HELP!!!!! i give a lot of points!!!!
Answer:
I think it s the third one
BTW yw if it's correct
What state does a gas turn into if it reaches it freezing point?
O Solid
O Liquid
Gas
O None of the above
Answer:
Solid
Explanation:
According to Wikipedia
Deposition is the phase transition in which gas transforms into solid without passing through the liquid phase. Deposition is a thermodynamic process. The reverse of deposition is sublimation and hence sometimes deposition is called desublimation.
Calculate the molarity of each of the following solutions.
1.30 mol of KNO3 in 250.0 mL of solution
0.500 mol of BaCl2 in 100.0 mL of solution
0.195 mol of Na2CO3 in 200.0 mL of solution
7.00 mol of C6H12O6 in 250.0 mL of solution
Answer:
5.2M, 5M, 0.975M, 28M
Explanation:
M = ( moles × 1000 ) ÷ volume
Molarity is affected by temperature. Its unit is mole/litre. It measure the concentration of any solute in a solution. Thus the molarity of [tex]KNO_{3}[/tex],[tex]BaCl_{2}[/tex],[tex]Na_{2}CO_{3}[/tex] and[tex]C_{6}H_{12}O_{6}[/tex] are 5.2mol/litre, 5mol/litre, 0.97mol/litre, 28mol/litre respectively.
What is molarity?
Molarity can be calculated by dividing number of moles of solute by volume of solution in liter.
Other concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution
Mathematically,
Molarity= number of moles of solute/volume of solution in litre (1)
1) Molarity of [tex]KNO_{3}[/tex]= {1.30 mol ×(1000ml/l)}÷250.0 mL=5.2mol/litre
2)Molarity of [tex]BaCl_{2}[/tex]= {0.500 mol ×(1000ml/l)}÷100.0 mL=5mol/litre
3)Molarity of[tex]Na_{2}CO_{3}[/tex]= {0.195 mol ×(1000ml/l)}÷200.0 mL=0.97mol/litre
4)Molarity of [tex]C_{6}H_{12}O_{6}[/tex] = {7.00 mol ×(1000ml/l)}÷ 250.0 mL=28mol/litre
Thus the molarity of [tex]KNO_{3}[/tex],[tex]BaCl_{2}[/tex],[tex]Na_{2}CO_{3}[/tex] and[tex]C_{6}H_{12}O_{6}[/tex] are 5.2mol/liter, 5mol/litre, 0.97mol/litre, 28mol/litre respectively.
Learn more about Molarity, here:
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3. A sample of gas has a volume of 364 mL at a temperature of 25 ᴼC. What will the volume be if the temperature is changed to 100 ᴼC while the pressure is kept constant?
Answer:
1027.9 mL, its easy
Explanation:
C.5A What is the symbol of the atom shown below?*
8 points
8 electrons
8 protons
8 neutrons
N
c
..........................
One of the following species is not isoclectronic. A. PO4³-B. BrO4- C. H2SO4 D. XeF4 E. CCl4
Answer:
फ्य्फ्य्क्ज्य्य्क्सुग्किग्क्सिगिदित्फ
What is the periodic table?
Answer:
A Chart Of The Chemical Elements That Displays Them In Rows Horizontally In Order Of Increasing Atomic Number And Vertically According To Similarity Of The Chemical Properties Of Their Atoms.
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
Answer:
what the model is describing is the molecules. when molecules are tightly packed they form a solid like ice, and when the ice is melting forms a liquid because the molecules are spreading out. when the ice evaporates (gas) the molecules are moving about and are not touching eachother
what's is the most stable oxidation state for chromium and iron
Chromium exhibits a wide range of possible oxidation states, where the +3 state is the most stable energetically. The +3 and +6 states are the most commonly observed in chromium compounds, whereas the +1, +4 and +5 states are rare.
What is polyethylene?
A.Thermoplastic polymer
B.Electroplastic polymer
C.Thermoplastic monomer
D.Single monomer
Explanation:
thermoplastic polymer
How many atoms of oxygen in the chemical formula 2Ca(ClO2)2?
Answer:
Calcium Nitrate is made up of three different elements and contains a total of nine atoms. This compound's formula is Ca(NO3)2. There is one calcium atom, two nitrogen atoms, and there are six oxygen atoms in calcium nitrate
What is the mass grams that are in 1 molecule of H2?
what is the difference between cyclic compound and straight chain compound in hydrocarbons reaction
Explanation:
Cyclic Hydrocarbons
A cyclic hydrocarbon is a hydrocarbon in which the carbon chain joins to itself in a ring. A cycloalkane is a cyclic hydrocarbon in which all of the carbon-carbon bonds are single bonds. Like other alkanes, cycloalkanes are saturated compounds. Cycloalkanes have the general formula CnH2nCnH2n. The simplest cycloalkane is cyclopropane, a three-carbon ring.
write insoluble or soluble solution for the following mixtores
1
2
3
4
5
Gasoline in water = insoluble
acetone in nail polished = soluble
salt in alcohol = soluble
oil in vinegar = insoluble
tawas in water = soluble...
Sorry if i am incorrect......
Need this answered immediately. 50 points.
Answer:
a
b
d
c
a
Explanation:
hope helpful pls give brainliest
Answer:
Hey if its up tomorrow I can I can’t rn sorry :(
Explanation:
Calculate the volume of an object with a density of .85 g/mL and a mass of 212 g.
[tex]\\ \sf\longmapsto Volume=\dfrac{Mass}{Density}[/tex]
[tex]\\ \sf\longmapsto Volume=\dfrac{212}{0.85}[/tex]
[tex]\\ \sf\longmapsto Volume=249.4mL[/tex]
Answer:
[tex]249.41 \: ml[/tex]
Explanation:
[tex]volume = \frac{mass}{density} \\ = \frac{212g}{0.85 \: g \: {ml}^{ - 1} } \\ = 249.41 \: ml[/tex]
Hope this helps you.
Let me know if you have any other questions :-):-)
I want the C answer plss help meee
Answer:
Mark me as a Brainliest
Due to the fact that electrons are delocalized in graphite, it is a good conductor of electricity. Carbon atoms in graphite form hexagonal layers and are in covalent bonds with three other carbon atoms. Due to this non-bond electron configuration, each carbon atom conducts electricity in the form of a delocalized electron.
is it possible to convert molecule to molecule?
Answer:
yes, it's possible to covert molecule to molecule
Explanation:
Converting between molecules and moles is done by either multiplying by or dividing by Avogadro's number.
hope it helps.
plz mark me as brainliest
have a great day ahead
How many different types of elements make up one molecule of potassium perbromate, KBrO4?
Answer:
3.
Explanation:
potassium
bromine
oxygen
A chunk of sulfur has a volume of 8.33 cm3. What is the mass of this sulfur? (Density of sulfur = 2.07 g/cm3.)
Explanation:
equations to note:
density= mass/volume
mass= volume *density
volume= mass/density
you have a volume- 8.33cm3
you have a density- 2.07 g/cm3
Answer:
8.33cm3 * 2.07g/cm3= 17.24g
mass= 17.24g
Homeostasis in a constantly changing environment is a process known as
when a candle burns both physical and chemical changes take place at identify these changes give another example of a familiar process in which both the chemical and physical changes takes place.
Answer:
So, the melting of wax and vapourisation of melted wax are physical changes. Chemical Changes : The wax near flame burns and gives new substances like carbon dioxide, carbon soot, water vapour, heat and light. LPG is another example of a familiar process in which both the chemical and physical changes take place.