25 °C = ________ K
which one
298
0
33
197
Answer:
298
hope this helps
have a good day :)
Explanation:
Which two types of cells are involved in fertilization?
OA. zygote; egg cell
OB. zygote; prokaryote
Oc. sperm cell; zygote
D. egg cell; sperm cell
Which two types of cells are involved in fertilization?
[tex]\sf\purple{D.\: egg\: cell;\: sperm \:cell}[/tex]✅
Gametes are an organism's reproductive cells. The female gametes are called ova or egg cells, and the male gametes are called sperm. During fertilisation, the gametes (an egg and sperm) fuse to form a zygote.[tex]\circ \: \: { \underline{ \boxed{ \sf{ \color{green}{Happy\:learning.}}}}}∘[/tex]
Brief report on the carbon cycle
Answer:
Explanation:
The carbon cycle describes the process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere. Carbon is released back into the atmosphere when organisms die, volcanoes erupt, fires blaze, fossil fuels are burned, and through a variety of other mechanisms.
MARKING BRAINLIEST Think about the fact that water is most dense at 4°C, and the fact that ice is much less dense than
water.
a. What would happen to a lake or a pond in the winter (in a cold climate) if this wasn’t the
case?
b. What if the water continued to contract, and the solid form (ice) was more dense than liquid
water?
c. How would this affect the life in the lake
please answer all
Answer:
See Explanation
Explanation:
a) If water is not most dense at 4°C, then the entire lake or pond will simply freeze bottom-up during winter thereby leading to the death of all the aquatic organisms inside the pond.
b) If the solid ice was more dense than water then it will sink inside the water thereby making room for the water to continue to freeze until all the water in the lake or pond will be converted to ice.
c) If the scenario described in (a) and (b) above occurs, the lake will simply cease to exist because all the living organisms in it will die and begin to decay after the ice has melted after the winter season thereby leading to a complete loss of the lake or pond.
Answer:
mark them brainyist
Explanation:
Energy is released when the nucleus of an atom splits and two smaller atoms are formed. What is the name of this process?
A. Electricity
B. Nuclear Fusion
C. Positron Particles
D. Nuclear Fission
Explanation:
It's (D), nuclear fission................
Can everyone help me :)
Answer:
joules
Heat is the transfer of thermal energy from a system to its surroundings or from one object to another as a result of a difference in temperature. Heat is measured in joules (J).
Explanation: Mrk me brainliest please
Answer: Joules or calories
Is my answer correct?
Yes the ANSWER is Correct-
On first half life the mass will be 10 gram
On second half life the mass will be 5 gram
On third half life the mass will be 2.5 gram
30 POINTS PLS MATCH THESE UP!!
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This is a species which speeds up chemical reactions, but does not react itself.
dag and drop where
Catalyst
The changing of substances to other substances by the breaking of bonds in
reactants and the formation of bonds in products.
drag and drop answerhero
Chemical Reaction
This is the substance(s) formed in a chemical reaction.
drag and drop answer hore
Neutralization
Precipitate
drag and drop answer hore
A chemical reaction in which two or more substances combine to form a single
substance. Also known as a combination reaction.
A chemical change in which a single compound is broken down into two or more
simpler products,
Reactants
drag and drop answer here
decomposition reaction
double replacement
A chemical change in which one element replaces a second element in a compound,
drag and drop answer here
endothermic
A chemical change that involves an exchange of positive ions between two
compounds.
drag and drop answer hore
exothermic
A heat-absorbing process
drag and drop answer here
half reaction
A heat releasing process.
drag and drop answer here
product
single replacement reaction
These are the elements or compounds that enter into a chemical reaction. .
drag and drop answer here
structural formula
This is the type of reaction that occurs when an acid cancels with a base.
drag and drop answer here
synthesis reaction
This is a solid that is formed during a chemical reaction, typically in solution.
drag and drop answer here
A half reaction shows either the oxidation or reduction half of a redox reaction.
drag and drop answer het
A formula showing all the atoms and valence electrons in the formula. This is also
called a Lewis Structure.
drag and drop answer here
Answer:
There is an app called Socrative (It has an owl on the app) that can give you the definition so you can match them without waiting. All you have to do is take a picture of the definition and it will give you the answer
Suppose the cylinder had a mass of 20kg and started at a height of 2,000m .if the initial temperature of the water was 25° C, what would be the final temperature.?
Answer:
Explanation:
m-mass of substance
s- specific heat capacity
dt- change in temperature.
So equating, mgh=ms(dt), we get (dt)=gh/s.
multiple choice question!
Answer:
butyne
Explanation:
Suffix -yne indicates presence of triple bond and prefix but- means 4 carbons atoms.
How are photons emitted by atoms?
Explanation:
When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.
why us graphite used as a lubricant?
Answer:
The carbon atoms are strongly bonded together in sheets.
Explanation:
Because the bonds between the sheets are weak, graphite shows lower shearing strength under friction force. Thus it can be used as a solid lubricant and has become one of traditional and primary solid lubrication materials.
Explanation:
The carbon atoms are strongly bonded together in sheets. Because the bonds between the sheets are weak, graphite shows lower shearing strength under friction force. Thus it can be used as a solid lubricant and has become one of traditional and primary solid lubrication materials.
Whoever solves this right will get brainliest :3
Reaction 1 → Al + Zn²⁺ ⟶ Al³⁺ + Zn
Reaction 2 → Al³⁺ + Li ⟶ Al + Li⁺
To Find :-Substance OxidisedSubstance ReducedOxidizing Agent Reducing Agent Answers :-Reaction 1 :-
Substance Oxidised :- Al
Substance Reduced :- Zn²⁺
Oxidizing Agent :- Zn²⁺
Reducing Agent :- Al
Reaction 2 :-
Substance Oxidised :- Li
Substance Reduced :- Al³⁺
Oxidizing Agent :- Al³⁺
Reducing Agent :- Li
____________________Final Answers :-Reaction 1 :-
Al
Zn²⁺
Zn²⁺
Al
Reaction 2 :-
Li
Al³⁺
Al³⁺
Li
____________________Explain why the carbon anodes need to be replaced periodically.
Who ever Answer this right will get brainliest :3
Answer:
Carbon anodes need to be replaced periodically to avoid oxidation. During the Electrolysis of the Alumina, Oxygen is deposited at the anode. The oxygen reacts with the carbon anodes causing the formation of carbon dioxide. Anode is made up of the graphite (or Carbon), thus carbon reacts with the Oxygen and forms its oxide. As a result of this Oxidation, we need to replace the anode from time to time
which will have a greater inertia the moon or the earth
A galvanic cell whose cell reaction is 2Fe3+(aq) + Zn(s) → 2Fe2+(aq) + Zn2+(aq) has a cell potential of 0.72V. What is the maximum electrical work that can be obtained from this cell per mole of iron(III) ion?
Answer:
138.96kJ is the maximum electrical work
Explanation:
The maximum electrical work that can be obtained from a cell is obtained from the equation:
W = -nFE
Where W is work in Joules,
n are moles of electrons = 2mol e- because half-reaction of Zn is:
Zn(s) → Zn²⁺(aq) + 2e⁻
F is faraday constant = 96500Coulombs/mol
E is cell potential = 0.72V
Replacing:
W = -2mol*96500Coulombs/mol*0.72V
W = - 138960J =
138.96kJ is the maximum electrical work
Help me Pleaseeeeeeeee
drag
effect
friction
parachutes
surface area
streamlined
air
water
A cylinder is filled with 10.0 L of gas and a piston is put into it. The initial pressure of the gas is measured to be 273. kPa.
The piston is now pulled up, expanding the gas, until the gas has a final volume of 50.0 L. Calculate the final pressure of the gas. Be sure your answer has the
correct number of significant digits.
P2 = 54.6 kPa
Explanation:
Given:
V1 = 10.0 L. V2 = 50.0 L
P1 = 273 kPa. P2 = ?
We can use Boyle's law to solve this problem.
P1V1 = P2V2
Solving for P2,
P2 = (V1/V2)P1
= (10.0 L/50.0 L)(273 kPa)
= 54.6 kPa
why is water regarded as a universal solvent
Answer:
[tex]\huge \fbox \pink {A}\huge \fbox \green {n}\huge \fbox \blue {s}\huge \fbox \red {w}\huge \fbox \purple {e}\huge \fbox \orange {r}[/tex]
Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This is important to every living thing on earth. It means that wherever water goes, either through the ground or through our bodies, it takes along valuable chemicals, minerals, and nutrients.
It is water's chemical composition and physical attributes that make it such an excellent solvent. Water molecules have a polar arrangement of the oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge. This allows the water molecule to become attracted to many other different types of molecules. Water can become so heavily attracted to a different molecule, like salt (NaCl), that it can disrupt the attractive forces that hold the sodium and chloride in the salt molecule together and, thus, dissolve it.
What part of the US government continued to study cold fusion after others gave up on it?
A.) the Army
B.) the Navy
C) the Coast Guard
D.) the Marines.
3 061 2021
Date
some industrial processes require carbon dioxid.
the carbon dioxide is stored on-site in large
tanks as liquid carbon dioxide. Assu
assuming
lived at sea level cl arm), how could carbon
dioxide be liquefied?
Answer:i don't understand
Explanation: yes
X rays are used for
tracking storms.
killing bacteria.
screening luggage at airports.
two of the above
The green elements on the table are called blank elements
The modern periodic table consists of metals, non-metals and metalloids. The elements are arranged in the increasing order of their atomic numbers. The elements which are shaded in green colour are metalloids.
What is are metalloids?The elements which exhibit the properties of both metals and non-metals are called metalloids. Some of the important metalloids are germanium, silicon, antimony, tellurium and polonium.
The physical and chemical properties of the metalloids fall in between the metal and non-metal categories. The metalloids have metallic properties and appearances, but they are brittle and mediocre electricity conductors.
The metalloids also have electronic band structures which are similar to semimetals or semiconductors. These elements generally have intermediate ionization energies and electronegativity. They form both amphoteric or weakly acidic oxides.
These elements also form metallic alloys. So metalloids behave like metals as well as like non-metals.
Thus the green shaded elements are metalloids.
To know more about metalloids, visit;
https://brainly.com/question/2548493
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Your question is incomplete most probably your question was:
The green elements on the table are called blank elements
Convert 96.3g of calcium sulfate,CaSO4 into moles
Answer:
0.7073569530323789
Explanation:
They prob want it rounded tho so 0.71
What is the pOH in a solution that has pH = 11.397
Answer:
The pOH is 2.603
Explanation:The formula for finding pOH by pH is simply subtracting the pH from 14 pOH=14-11.397pOH=2.603.
Can someone help I’m stuck on this question
Answer:
It is propyl amine.
as amine =H-N-H
and it contain 3C =prop
You have a mixture that contains 0.380 moles of Ne(g), 0.250 moles of He(g), and 0.500 moles CH4(g) at 400 K and 6.25 atm. What is the partial pressure of He?
Answer:
1.38 atm
Explanation:
Partial pressure of a gas = total pressure × mole fraction of that gas.
Mole fraction of a gas is moles of a gas ÷ total moles of all gases.
The partial pressure of Helium gas is 2.756 atm. This can be calculated by using mol fraction first.
Calculation of mol fraction:
It is the ratio of one mole of gas to the total moles of all the gases.
Total moles of all gases = 0.380+0.250+0.500 =1.13
Mol fraction of Helium gas = 0.500/1.13
Mol fraction of Helium gas = 0.442
Calculation of partial pressure:It is the product of mol fraction of the gas to the total pressure given.
Partial pressure= 0.442 * 6.52 atm
Partial pressure=2.765 atm
Find more information about Mol fraction here:
brainly.com/question/1601411
why are the elements take part in bonding
Answer:
Atoms form chemical bonds to make their outer electron shells more stable. The type of chemical bond maximizes the stability of the atoms that form it. ... Covalent bonds form when sharing atoms results in the highest stability. Other types of bonds besides ionic and covalent chemical bonds exist, too.
What is another factor that can influence osmosis?
Answer:
Concentration gradient - The movement of osmosis is affected by the concentration gradient; the lower the concentration of the solute within a solvent, the faster osmosis will occur in that solvent. Light and dark – They are also factors of osmosis; since the brighter the light, the faster osmosis takes place.
thenks and mark me brainliestt :)) pls
Answer: Concentration gradient - The movement of osmosis is affected by the concentration gradient; the lower the concentration of the solute within a solvent, the faster osmosis will occur in that solvent. Light and dark – They are also factors of osmosis; since the brighter the light, the faster osmosis takes place.
Explanation:
Osmosis is the passage of water from a high solute concentration area through a semi permeable membrane to a low solute concentration area to equalize the solute concentrations on both sides.
What is cells function of animal cell??
PLZ HELP ME
Answer:
Controls the movement of substances into and out of the cell.