Answer:
True
Explanation:
Single celled prokaryotic cells use meiosis to reproduce. Its ''TRUE''
What is a Prokaryotic cell ?A prokaryote is a single-celled organism that lacks a nucleus, and other membrane-bound organelles.
Prokaryotic cells are single-celled microorganisms known to be the earliest on earth.
Prokaryotes include Bacteria and Archaea.
The photosynthetic prokaryotes include cyanobacteria that perform photosynthesis.
A prokaryotic cell consists of a single membrane and therefore, all the reactions occur within the cytoplasm.
Prokaryotes reproduce through a cell division process called binary fission.
Like mitosis in eukaryotes, this process involves copying the chromosome and separating one cell into two.
Hence, Single celled prokaryotic cells use meiosis to reproduce is a ''TRUE'' statement.
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The two liquids of the mixture having the same boiling point cannot be seperation of distillation Explain.
Answer:
True
Explanation:
Two liquids of a mixture having the same boiling point cannot be separated using the process of distillation.
Distillation is one of the process of physical separation techniques.
It relies on physical property called the boiling point. In a fractionating column, a mixture is heatedAs the boiling point of the each component compound in the mixture is reached, the compound rises up within the column.So without a difference in the boiling point of the compound that makes up a mixture, the separation by distillation will not be possible.
If 6 grams of a hydrocarbon gas have a volume of
4.8 cubic decimeter, what would be the
approximate molecular mass of this gas?
A 30 grams
B 40 grams
C 20 grams
D 48 grams
Answer:
30 grams
Explanation:
I got 40 wrong so I picked 30
Answer:
30 grams
Explanation:
I did the ck12
Which has a higher melting point KF or KI?
Answer:
kf
Explanation:
which two sentences taken together provide the best evidence to support the ideas that both physical and chemical change can significantly change the appearance of a substance ?
A. in a physical change the material involved is structurally the same before and after the change
B. a piece of metal may be heated in a fire until it glows but the metal is the same material before Heating and after Cooling
C. chemical changes require the breaking and forming of chemical bonds during a chemical reaction
D. the creation of a new ,solid substance from to liquid substance into the kids that a reaction has taken place that has alerted the original substance
Answer:
A ithink
Explanation:
The chemical changes require the breaking and forming of chemical bonds during a chemical reaction. The correct option is C.
What is chemical bond?Chemical Bonding refers to the formation of a chemical bond between two or more atoms, molecules, or ions to give rise to a chemical compound.
These chemical bonds are what hold the atoms in the resulting compound together.
A chemical bond is a bond formed when the atoms in a compound's molecule combine and are held together by a strong combining force.
Chemical bonds are classified into two types namely ionic bonds and covalent bonds.
Chemical bonding enables scientists to combine the elements of the periodic table in a variety of ways to create chemical compounds and materials.
Thus, the correct option is C.
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which graph above best represents the relationship between the volume and the pressure of a gas?
The graph (A) best represents the relationship between the volume and the pressure of a gas.
What is pressure?The force was applied perpendicular to an object's surface per unit area across which that force is spread is known as pressure. The relationship between pressure and volume can be understand with the aid of ideal gas law.
PV=nRT.
where, P is pressure, V is volume.
It can be seen that when temperature will kept constant then pressure will be inversely proportional to the volume. It can be shown as:
P ∝ 1/V.
Therefore, graph A represent relationship between pressure (P) and volume (V).
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ОА
H+ HH
O H+ H → He
Oc He+
TH
Не
ODH +
Η
>
Ao H+HH OH
santa said he will eat shower curtian at 2 am
2KCI -> K + CI2
balanced or unbalanced pls help
Answer:
unbalanced I know you should know to
2. Water is an example of a(n)
a. inorganic b. organic
compound.
d. none of these
c. carbon
it would be A ,inorganic Compound
Select the correct answer.
What are the oxidizing agent and the reducing agent in this chemical equation?
3FeS + 8HNO3 → 3FeSO4 + 8NO + 4H2O
A.
FeS is the oxidizing agent, and HNO3 is the reducing agent.
B.
HNO3 is the oxidizing agent, and NO is the reducing agent.
C.
FeS is the reducing agent, and HNO3 is the oxidizing agent.
D.
HNO3 is the reducing agent, and NO is the oxidizing agent.
Answer:
Its answer choice C
You dissolve 8.65 grams of lead(II) nitrate in water, and then you add 2.50 grams of aluminum. This reaction occurs: 2Al(s) + 3Pb(NO3)2(aq) → 3Pb(s) + 2Al(NO3)3(aq). What’s the theoretical yield of solid lead? Use the ideal gas resource and the periodic table. A. 5.41 g B. 11.2 g C. 19.2 g D. 28.8 g Reset
Answer: A. 5.41
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} Al=\frac{2.50g}{27g/mol}=0.0926moles[/tex]
[tex]\text{Moles of} Pb(NO_3)_2=\frac{8.65g}{331g/mol}=0.0261moles[/tex]
[tex]2Al(s)+3Pb(NO_3)_2(aq)\rightarrow 3Pb(s)+2Al(NO_3)_3(aq)[/tex]
According to stoichiometry :
3 moles of [tex]Pb(NO_3)_2[/tex] require = 2 moles of [tex]Al[/tex]
Thus 0.0261 moles of [tex]Pb(NO_3)_2[/tex] will require=[tex]\frac{2}{3}\times 0.0261=0.0174moles[/tex] of [tex]Al[/tex]
Thus [tex]Pb(NO_3)_2[/tex] is the limiting reagent as it limits the formation of product and [tex]Al[/tex] is the excess reagent.
As 3 moles of [tex]Pb(NO_3)_2[/tex] give = 3 moles of [tex]Pb[/tex]
Thus 0.0261 moles of [tex]Pb(NO_3)_2[/tex] give =[tex]\frac{3}{3}\times 0.0261=0.0261 moles[/tex] of [tex]Pb[/tex]
Mass of [tex]Pb=moles\times {\text {Molar mass}}=0.0261moles\times 207g/mol=5.41g[/tex]
Thus 5.41 g of solid lead will be produced from the given masses of both reactants.
What happens to ions during bonding to form an ionic compound? O Cations accept electrons and anions give away electrons. O Anions and cations share electrons. O Cations give away electrons and anions accept those electrons.
Answer:
Last one: Cations give away electrons and anions accept those electrons.
Explanation:
Just did it
Answer:
D
Explanation:
"Cations give away electrons and anions accept those electrons."
which element will chemically combine with fluorine to form a salt?
a. carbon
b. lithium
c. neon
d. oxygen
Why do the electron clouds around a central atom stay as far apart as possible?
Electron pairs around a central atom arrange themselves so that they can be as far apart as possible from each other. The repulsion between negatively charged electrons pairs in bonds or as lone pairs causes them to spread apart as much as possible
Explanation:
what is the name of the covalent compound N5Cl8
Answer:
Did you put that in right because i've never heard of a compound called that nor is there a compound called that on the internet
Explanation:
You must of put that in wrong
PLEASE I NEED HELP!!
You find a ring with a mass of 89.2g. You fill a graduated cylinder up with 10mL of water
and put the ring into the cylinder. The water mark rises up to the 20mL mark. What is
the ring made of?
Solids
Table of Densities
Density g/cm
Solids
2.56
Copper
2.64
Gold
3.52
Platinum
Density g/cm
8.92
Marble
Quartz
19 32
Diamond
214
O Marble
Quartz
Copper
Gold
Answer:
Ring is made up off copper.
Explanation:
Given data:
Mass of ring = 89.2 g
Volume of water = 10 mL
Volume of water + ring = 20 mL
Ring is made up of = ?
Solution:
Volume of ring = (Volume of water + ring) - Volume of water
Volume of ring = 20 mL - 10 mL
Volume of ring = 10 mL
Density:
Density = mass/volume ( 1 mL = 1 cm³)
d = 89.2 g/ 10cm³
d = 8.92 g/cm³
Thus, ring is made up off copper.
You find a ring with a mass of 89.2g. You fill a graduated cylinder up with 10mL of water
and put the ring into the cylinder. The water mark rises up to the 20mL mark. What is
the ring made of
Solids
Table of Densities
Density g/cm
Solids
2.56
Copper
264
Gold
Density g/cm
8.92
Marble
19.32
Diamond
3.52
Platinum
21.4
O Marble
O Quartz
Copper
Gold
Answer:
Ring is made up off copper.
Explanation:
Given data:
Mass of ring = 89.2 g
Volume of water = 10 mL
Volume of water + ring = 20 mL
Ring is made up of = ?
Solution:
Volume of ring = (Volume of water + ring) - Volume of water
Volume of ring = 20 mL - 10 mL
Volume of ring = 10 mL
Density:
Density = mass/volume ( 1 mL = 1 cm³)
d = 89.2 g/ 10cm³
d = 8.92 g/cm³
Thus, ring is made up off copper.
A sample of silver metal contains 1.91 X 1021 atoms. How many moles of silver is
this?
Answer:
1.91×1021/6.023×10^23
Explanation:
need thanks and make me brainiest if it helps you
A consequence of burning fossil fuels is
warming.
What is the work done on an object moves a distance of 6.3 m with a force of 8.5 times 10 to the third power Newtons?
Answer:
5.355 × 10³ JExplanation:
The work done by an object can be found by using the formula
workdone = force × distance
From the question we have
workdone = 8.5 × 10³ × 10
We have the final answer as
5.355 × 10³ JHope this helps you
What characteristic do atoms in the same group of elements share?
1 - they have the same number
2 - they have similar physical property
3 - they have the same atomic mass
4 - the same number of electrons orbitals
Answer:
2 option
Explanation:
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who is good at chemistry?! HMU asap!!!
In your own words, please write a paragraph explaining what chemical and physical properties of elements mean.
Answer:
If this anwser helped you mark it the brainest please
Explanation:
Properties are features, qualities or characteristics of an item. Properties shall be used to classify the components. Properties are the attributes of a material that separates it from another substance. These properties are called physical properties and chemical properties in chemistry.
When ionic compounds are added to water, they dissociate or break apart into ions. In the case of table salt, salt added to water dissociates into sodium ions and chloride ions. This would seem to be a chemical change. However, scientists do not consider this to be one, because the solid table salt remains after the water is evaporated. The atoms recombine into their original arrangement once the water is removed.
Which word from the selection helps you understand that physical changes can be undone?
a added
b dissociate
c recombine.
d removed
If u like someone
how do u know if they like u back.
Answer:
The chemistry between you will be instant. Sometimes it may be hard to know if they like you back. Knowing that you can not live without them and that you bump in to each other everywhere you go, is fate at work. You might also just need the courage to ask them out. You never know what will happen if you try. :)
Answer:
You will feel it
Explanation:
When should you avoid looking directly at magnesium burning?
Answer:
Magnesium also reacts with nitrogen in the air to produce some magnesium nitride (Mg3N2). Safety: Do not look directly at the burning magnesium due to the intensity of the light. A dry-powder fire extinguisher should be available. Disposal: Once cooled the solid magnesium products can be thrown in the trash.
Explanation:
WORTH 20 POINTS PLZZZ HELP WILL GIVE BRANLIEST PLZZZ
A toaster transforms P energy into Q energy.
What do P and Q most likely represent?
P represents electrical energy, Q represents thermal energy
P represents thermal energy, Q represents electrical energy
P represents chemical energy, Q represents radiant energy
P represents radiant energy, Q represents chemical energy
Answer: P represents electrical energy, Q represents thermal energy.
Explanation: The toaster takes electrical energy from the electrical socket through wires and converts that into thermal energy that heats up/toasts the bread.
Answer:
P represents electrical energy, Q represents thermal energy
Explanation:
I am sorry if I get this wrong, but when I put it in the sentence - A toaster transforms electrical energy into thermal energy - it made sense to me, so I think that is the answer. I am sorry if this does not help.
FIRST PERSON ANSWER GETS PTS, BRAINLIEST, And SUPRISE
Is Aushtin dating Summer please help
Answer:
uhm yes he made her pump go off
Explanation:
can someone answer pls
A meterorite has velocity of 1544 m/s and a mass of 45 kg. Find its momentum
Answer:
69,480 kg.m/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocity
From the question we have
momentum = 45 × 1544
We have the final answer as
69,480 kg.m/sHope this helps you
Answer:
69,480 kg. m/s
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