Answer:
store water, waste, and nutrients for the cell
Help help help ASFAP
Answer:
A directory of relatives' phone numbers
Hope this helps
Explanation:
Which of these is a characteristic of science?
Answer:
What are the characteristics of science? Objectivity: Scientific knowledge is objective. Verifiability: Science rests upon sense data, i.e., data gathered through our senses—eye, ear, nose, tongue and touch. Ethical Neutrality: Science is ethically neutral. Systematic Exploration.
Explanation:
there are no options but I search and this is what I got.
can I have brainliest
HURRY PLEASE. All of the following are threats to biodiversity EXCEPT a. habitat destruction. b. gene pool diversity. c. pollution. d. exotic species.
Answer:
i think its A
Explanation:
Answer:
i think its b gene pool diversity
Explanation: hope this helps :)
A drop of water contains 2 x 104 bacteria. How many bacteria are in 100 gallons of water? [1 drop = 1 mL]
Answer:
7.57×10⁹ bacteria.
Explanation:
We'll begin by convert 100 gallons of water to millilitres (mL). This can be obtained as follow:
1 gallon = 3785.41 mL
Therefore,
100 gallons = 100 gallon × 3785.41 mL / 1 gallon
100 gallons = 378541 mL
Therefore, 100 gallons of water is equivalent to 378541 mL.
Next, we shall convert 378541 mL to drop of water. This can be obtained as follow:
1 mL = 1 drop
Therefore,
378541 mL = 378541 mL × 1 drop/ 1 mL
378541 mL = 378541 drop
Therefore, 378541 mL is equivalent to 378541 drops of water.
Finally, we shall determine the number of bacteria in 378541 drops of water as follow:
1 drop = 2×10⁴ bacteria
Therefore,
378541 drop = 378541 drop × 2×10⁴ bacteria / 1 drop
378541 drop = 7.57×10⁹ bacteria.
Therefore, there are 7.57×10⁹ bacteria in 100 gallons of water
determine the number of moles of KOH present in 95.0 ml of 0.255 M solution
Answer:
Moles of KOH in 1000 mL solution = 0.255 moles
Moles of KOH in 1 mL solution = 0.255/1000 = 0.000255 moles
Moles in 95 mL solution = (95 * 255)/1000000 = 24225/1000000
Moles of KOH in 95 mL 0.255M solution = 0.024225 moles
The number of moles of KOH present in 95.0 ml of 0.255 M solution is 0.024mol
HOW TO CALCULATE NUMBER OF MOLES:
The number of moles of a substance can be calculated by multiplying the molarity/concentration of the substance by its volume:no. of moles = molarity (M) × volume (L)
According to this question, 95.0 ml of KOH is present in 0.255 M solution, hence, the number of moles can be calculated as follows:Volume of KOH = 95.0ml = 0.095Lno. of moles = 0.095 × 0.255no. of moles = 0.024molTherefore, the number of moles of KOH present in 95.0 ml of 0.255 M solution is 0.024mol.Learn more at: https://brainly.com/question/21085277?referrer=searchResults
Excess ammonia (NH3) is added to 5.137 grams of seaborgium hexachloride. The only products are 4.146 grams of a solid containing only seaborgium, nitrogen, and chlorine and 1.174 grams of a gas. The gas is 97.23% chlorine, and the remainder is hydrogen. The empirical formula of the gas is HCl. What fraction of the chlorine from the original compound is in the solid after the reaction?
Answer:
[tex]w_{Cl}=0.5028[/tex]
Explanation:
Hello.
In this case, a partial chemical reaction can be written as:
[tex]NH_3+SgCl_6\rightarrow HCl+solid[/tex]
Thus, the mass of chlorine in the initial seaborgium hexachloride (molar mass: 475.718 g/mol) is:
[tex]m_{Cl}=5.137gSgCl_6*\frac{6*35.45gCl}{475.718 gSgCl_6} =2.297gCl[/tex]
Which is also the total chlorine. Moreover, the chlorine from the HCl is:
[tex]m_{Cl\ in \ HCl}=1.174gHCl*0.9723=1.142g[/tex]
It means that the chlorine in the solid is:
[tex]m_{Cl\ in\ solid}=2.297gCl-1.142gCl=1.155gCl[/tex]
Therefore, the required fraction (w) is computed by dividing the mass of chlorine in the solid by the mass of chlorine in the initial seaborgium hexachloride as the only source of chlorine at the beginning:
[tex]w_{Cl}=\frac{1.155g}{2.297g}\\ \\w_{Cl}=0.5028[/tex]
Best regards.
Infer: The metric system uses prefixes to tell you how much to multiply the base unit by. For example, in the metric system, the base unit for length is the meter. Examples of prefixes include kilo-, centi-, and milli-.
Knowing that 1,000 meters are in 1 kilometer, what do you think the prefix kilo- means?
Answer:
kilo means one thousand
Explanation:
Seeing as there are 1000 metres in one kilometre
Knowing that 1,000 meters are in 1 kilometer, The prefix kilo means 1000 or 1 kilogram (kg).
What is the metric system?The metric system is the system that uses gram, liter, and meter as the base unit for measuring the distance, volume, and length of any object or entity.
The metric system was started in France in 1970. There are common seven units in the metric system. The three main base units are gram, liter, and meter.
A liter is used to measure the Volume. Grams are used to measuring the quantity of a solid item. Meter is used to measure the distance or length of anything.
The kilogram is the base unit for measuring the quantity of any solid item, such as rice, and 1 kg of rice is the quantity of rice.
Thus, the prefix kilo means 1000 or 1 kilogram (kg).
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Which part of an organism is preserved in cast and mold fossils?
Answer: Bones.
Explanation:
Answer:
Bone
Explanation:
Which structure is located at the base of the brain and receives neural signals about smell from the sensory receptors? A. olfactory cilia B. olfactory bulb C. olfactory cortex D. olfactory base
Answer:
B: Olfactory Bulb
Explanation:
edg2020
The olfactory bulb is located at the base of the brain and receives neural signals about the smell from the sensory receptors. Hence, option B is correct.
What are sensory receptors?Sensory receptors are dendrites of sensory neurons specialized for receiving specific kinds of stimuli.
There are two olfactory bulbs on the bottom side of the brain, one above each nasal cavity.
The olfactory bulbs receive information about smells from the nose and send it to the brain by way of the olfactory tracts.
Hence, option B is correct.
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Which option is an example of a chemical change?
fireworks exploding
grinding powder
ironing a shirt
melting cheese
Answer:
the answer would be A. fireworks exploding
Explanation:
I TOOOK The test and i got thisone wrong lol so i reviwed what
i got wrong
Answer:
Fireworks exploding
(yes, i know i'm late UvU )
Read the scenario, and then answer the question that follows. Randy is the chief technology officer of a growing company. The company he works for is considering their software needs. The company currently has a few licenses for a proprietary software solution, but will need to greatly expand their operations quickly. The company has asked Randy to recommend a software solution that will allow the company’s engineers to customize the software to fit the specific functions and duties of the company’s employees, and to cheaply expand their operations to other office branches. Which of the following options would best fit Randy’s needs?
Answer:
B (implement an open source software solution) I'm late sorry
Explanation:
Answer:b
Explanation:
b
The temperature of a container of oxygen gas is increased from 149 k to 298 k which of the following statement is true, Explain:
A. The average kinetic energy of the oxygen molecules in the container decreases.
B. The average chemical potential energy of the oxygen molecules in the container increases.
C. The average kinetic energy of the oxygen molecules in the container increases.
D. The average chemical potential energy of the oxygen molecules in the container decreases.
Answer:
The average kinetic energy of the oxygen molecules in the container increases
Explanation:
I searched up, "what happens when the temperature of oxygen gas is increased''
As the temperature increases, the average kinetic energy increases as does the velocity of the gas particles hitting the walls of the container. The force exerted by the particles per unit of area on the container is the pressure, so as the temperature increases the pressure must also increase.
this is the answer google gave me so im not sure of you should 100% trust it but its better than nothing
The temperature of a container of oxygen gas is increased from 149 k to 298 k then the average kinetic energy of the oxygen molecules in the container increases. Thus option C is true.
What is kinetic energy?A kinetic energy is defined as a form of energy that an object or particle has by its motion.
It can be expressed as
K.E. = 1/2 mv²
There are basically three types of kinetic energy.
Translational kinetic energyRotational kinetic energyVibrational kinetic energyThe average kinetic energy is a product of half of the mass of each gaseous molecules.
The average kinetic energy is directly proportional to temperature.
Thus, the temperature of a container of oxygen gas is increased from 149 k to 298 k then the average kinetic energy of the oxygen molecules in the container increases. Thus option C is true.
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Compare the oxygen consumption of a sprinter and a marathon runner
pls give accurate answer
and answer it quickly.
Answer:
A sprinter consumes more oxygen than a marathon runner.
Explanation:
A sprinter requires big amounts of air in a short time to not get tired as fast and run faster. A marathon runner has more controlled and paced breathing so he does not get tired but can run long distances. Marathon runners also run slower than sprinters.
Each element has a different:
O number of protons and electrons
O atomic mass and weight
O Properties and characteristics
O number of neutrons
Answer:
Can someone help with this plase
Explanation:
Do you still need any help ?
Until a train is a safe distance from the station it must travel at 5 m/s Once the train is on open track it can speed up
to 45 mls. If it takes a train 8 seconds to reach 45 m/s, what is the acceleration of the train? (Round your answer to
the nearest whole number)
4 m/s2
5 m/s2
6 m/s2
7 m's?
Answer:
5 m/s²
Explanation:
From the question given above, it took 8 s for the train to get to a speed of 45 m/s. This simply means the train was maintaining 5 m/s as it travels in order to get to an open track.
Thus, we obtained the following data from the question.
Initial velocity (u) = 5 m/s
Final velocity (v) = 45 m/s
Time (t) = 8 s
Acceleration (a) =.?
Acceleration is simply defined as the rate of change of velocity with time. Mathematically, it can be expressed as:
a = (v – u) /t
Where:
a is the acceleration.
v is the final velocity.
u is the initial velocity.
t is the time.
With the above formula, we can obtain the velocity of the train as follow:
Initial velocity (u) = 5 m/s
Final velocity (v) = 45 m/s
Time (t) = 8 s
Acceleration (a) =.?
a = (v – u) /t
a = (45 – 5) / 8
a = 40/8
a = 5 m/s²
Therefore, the acceleration of the train is 5 m/s².
Answer:
Its B =)
Explanation:
HELP!!
What structure is found in the nucleus of a cell and is made up of coiled strands of DNA?
O protein
O gene
O chromosome
O centriole
The chemical formula for carbonic acid, a compound used in carbonated drinks, is H2CO3. Assume that these symbols represent the three
elements of this compound:
carbon
oxygen
hydrogen
Which picture correctly represents carbonic acid?
The chemical formula of carbonic acid is H₂CO₃ and in the structure form it will be represented according to the first structure.
What are acids?Acids are those substances which are having carboxylic group (-COOH) as a funtional group in it.
Given molecular formula of carbonic acids is H₂CO₃, in which one carbon atom is present in carboxylic group. In the molecule two hydrogen atoms are present and one of them is present in -COOH group and all three oxygen atoms are attached with carbon atom.
Hence the first image shows the structure of carbonic acid.
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When alpha particles were shot at a gold foil target, most of the particles were undeflected. This indicated to Rutherford that:______.
a) the gold foil was continuous matter.
b) the mass of the gold atoms was spread out thinly.
c) the atoms of gold were mostly empty space.
d) the alpha particles had great penetrating power.
e) the alpha particles had charges opposite to those on the nuclei.
Answer:
c) the atoms of gold were mostly empty space.
Explanation:
When alpha particles were shot at a gold foil target, most of the particles were un-deflected . It proved that the atom is mostly empty . The alpha particle enters the atom its velocity remains unchanged . Alpha particle has great kinetic energy due to great mass . So when it remains undeflected mostly that means the nucleus has great empty space through which alpha particle sails smoothly .
For clouds to form, water must vapor
Answer:
true
Explanation:
Which is a feature of a single replacement reaction?
Substance XYZ breaks down into X and YZ.
Substance G reacts with compound XY to form GY and X.
Substance X burns rapidly in the presence of oxygen.
Substance QR and GT exchange ions with each other.
Answer:
Substance G reacts with compound XY to form GY and X.
Explanation:
B. Substance G reacts with compound XY to form GY and X.
What is single replacement reaction?
A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound. When a replacement reaction occurs, a new aqueous compound and a different pure element will be generated as products.For example:2HCl(aq) + Zn(s) → ZnCl₂(aq) + H₂(g)
Therefore, correct option is B.
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Determine the formula weight of Ca(no3)2
Answer:
the formula is 164.088 g/mol
Explanation:
How many atoms are in 8g of Oxygen (O2)?
Answer:
There are 3.011 × 10^23 oxygen atoms
Describe the composition of Earth’s atmosphere
Construct the electron dot diagram for chlorine.
Step 1: Use the periodic table to find the chemical symbol
for chlorine.
The symbol for chlorine is:
СІ
Со
Cr
I will mark u braniest xcl XD
The chemical symbol for chlorine is Cl, which is derived from its Latin name "chlorum."
How to explainThe periodic table assigns unique symbols to each element as a shorthand notation. Chlorine is a halogen element with atomic number 17, and its symbol reflects this designation.
It is a highly reactive, greenish-yellow gas at room temperature and is commonly used as a disinfectant and in the production of various chemicals. Chlorine is an essential element in maintaining public health and is widely employed in water treatment processes to kill bacteria, viruses, and other microorganisms.
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100 POINTS & BRAINLIEST !!!! PLEASE HELP
Carbon, C, P Block, 2, 6, 12.0107u. 6 protons, 6 electrons, 6 neutrons
Helium, He, S Block, 1, 2, 4.0026u, 2 protons, 2 electrons, 2 neutrons
Germanium, Ge, P Block, 4, 32, 72.64u, 32 protons, 32 electrons, 41 neutrons
Oxygen, O, P Block, 2, 8, 16u, 8 protons, 8 electrons, 8 neutrons
Scandium, Sc, D Block, 4, 21, 44.9559u, 21 protons, 21 electrons, 24 neutrons
Tellurium, Te, P Block, 5, 52, 127.60u, 52 protons, 52 electrons, 76 neutrons
Hydrogen, H, S Block, 1, 1, 1.008u, 1 proton, 1 electron, 0 neutrons
Iron, Fe, D Block, 4, 26, 55.845u, 26 protons, 26 electrons, 30 neutrons
Beryllium, Be, S Block, 2, 4, 9.012u, 4 protons, 4 electrons, 5 neutrons
Vanadium, V, D Block, 4, 23, 50.942u, 23 protons, 23 electrons, 28 neutrons
Silver, Ag, D Block, 5, 47, 108u, 47 protons, 47 electrons, 61 neutrons
Gallium, Ga, P Block, 4, 31, 69.723u, 31 protons, 31 electrons, 39 neutrons
Bromine, Br, P Block, 4, 35, 79.904u, 35 protons, 35 electrons, 45 neutrons
Fluorine, F, P Block, 2, 9, 18.998u, 9 protons, 9 electrons, 10 neutrons
Manganese, Mn, D Block, 4, 25, 54.938u, 25 protons, 25 electrons, 30 neutrons
Strontium, Sr, S Block, 5, 38, 87.62u, 38 protons, 38 electrons, 50 neutrons
Francium, Fr, S Block, 7, 87, 223u, 87 protons, 87 electrons, 136 neutrons
Answer:
Carbon, C, P Block, 2, 6, 12.0107u. 6 protons, 6 electrons, 6 neutrons
Helium, He, S Block, 1, 2, 4.0026u, 2 protons, 2 electrons, 2 neutrons
Germanium, Ge, P Block, 4, 32, 72.64u, 32 protons, 32 electrons, 41 neutrons
Oxygen, O, P Block, 2, 8, 16u, 8 protons, 8 electrons, 8 neutrons
Scandium, Sc, D Block, 4, 21, 44.9559u, 21 protons, 21 electrons, 24 neutrons
Tellurium, Te, P Block, 5, 52, 127.60u, 52 protons, 52 electrons, 76 neutrons
Hydrogen, H, S Block, 1, 1, 1.008u, 1 proton, 1 electron, 0 neutrons
Iron, Fe, D Block, 4, 26, 55.845u, 26 protons, 26 electrons, 30 neutrons
Beryllium, Be, S Block, 2, 4, 9.012u, 4 protons, 4 electrons, 5 neutrons
Vanadium, V, D Block, 4, 23, 50.942u, 23 protons, 23 electrons, 28 neutrons
Silver, Ag, D Block, 5, 47, 108u, 47 protons, 47 electrons, 61 neutrons
Gallium, Ga, P Block, 4, 31, 69.723u, 31 protons, 31 electrons, 39 neutrons
Bromine, Br, P Block, 4, 35, 79.904u, 35 protons, 35 electrons, 45 neutrons
Fluorine, F, P Block, 2, 9, 18.998u, 9 protons, 9 electrons, 10 neutrons
Manganese, Mn, D Block, 4, 25, 54.938u, 25 protons, 25 electrons, 30 neutrons
Strontium, Sr, S Block, 5, 38, 87.62u, 38 protons, 38 electrons, 50 neutrons
Francium, Fr, S Block, 7, 87, 223u, 87 protons, 87 electrons, 136 neutrons
Explanation:
Write balanced, net ionic equations for the following precipitation, acidn base, or gasn forming reactions. Include states of matter. Hint: You should write the molecular equation first to predict the products. a) mixing aqueous solutions of iron (III) chloride and lithium sulfide b) mixing aqueous solutions of sodium acetate and ammonium phosphate c) mixing aqueous solutions of perchloric acid and potassium hydroxide d) mixing aqueous solutions of ammonia and nitric acid e) mixing aqueous solutions of nitrous acid and sodium hydroxide f) adding aqueous hydroiodic acid to solid calcium carbonate g) Problems c) through f) are acid- base reactions. Comment on the differences in the net ionic equations for these reactions.
Answer:
Explanation:
a ) 2FeCl₃ + 3Li₂S = Fe₂S₃ ( s ) + 6 LiCl
2Fe⁺³ + 6Li ⁻ + 6Cl⁻ + 3S⁻² = 6Li + 6Cl⁻ + Fe₂S₃ ( s )
b )
3CH₃COONa +( NH₄)₃PO₄ = 3CH₃COONH₄ + Na₃PO₄
3CH₃COO + 3Na⁺ + 3NH₄⁻ + PO₄⁺³ = 3CH₃COO⁻ +3NH₄⁺ + Na₃PO₄
c )
HClO₄ + KOH = kClO₄ + H₂O
H ⁺ + ClO₄⁻ + K⁺ + OH⁻ = k⁺ ClO₄⁻ + H₂O
d )
NH₄OH + HNO₃ = NH₄NO₃ + H₂O
NH₄⁺ + OH⁻ + H⁺ + NO₃⁻ = NH₄⁺ + NO₃⁻ + H₂O
e )
HNO₂ + KOH = KNO₂ + H₂O
H⁺ + NO₂⁻ + K⁺ + OH⁻ = K⁺ + NO₂⁻ + H₂O
f ) HIO₃ + CaCO₃ ( s ) = Ca( IO₃ )₂ + H₂CO₃
H⁺ + IO₃⁻ + CaCO₃ ( s ) = Ca( IO₃ )₂ + H₂CO₃
g )
c ) is strong acid and strong base
d ) is weak base and strong acid
e ) weak acid and strong base
f ) Strong acid and basic salt
. A protein has molecular mass of 400 kDa when measured by size exclusion chromatography. When subjected to gel electrophoresis in the presence of sodium dodecyl sulfate (SDS), the protein gives three bands with molecular masses of 180, 160, and 60 kDa. When electrophoresis is carried out in the presence of SDS and dithiothreitol, three bands are again formed, this time with molecular masses of 160, 90, and 60 kDa. Determine the subunit composition of the protein.
Answer:
The protein has 4 subunits: 2 subunits of 90 kDa, 1 subunit of 160 kDa and 1 subunit of 60 kDa
Explanation:
In gel electrophoresis, the SDS agent produces denaturation of the protein and confers negative charge, so the protein subunits can migrate according to their masses. It produces dissociation of the protein in its subunits but it cannot disrupt disulphyde bridges (S-S) that can bond subunits together.
From the data, with SDS we observe 3 bands ⇒ 180 kDa + 160 kDa + 60 kDa
The addition of dithiotreitol (DTT), a reducing agent, produces the disruption of disulphyde bridges. From the data:
With DTT ⇒ 160 kDa + 90 kDa + 60 kDa
We observe that 160 kDa and 60 kDa subunits are conserved (they are the same as with SDS only), but 180 kDa subunit is missing and in its place appears a band of 90 kDa - a half 180 kDa.
So, the band at 180 kDa is composed by two subunits bonded by a disulphyde bridge.
Therefore, the composition of the protein is: 1 subunit of 160 kDa, 2 subunits of 90 kDa and 1 subunit of 60 kDa.
Please Help! 100 points!!!!!
In Parts I and II of the lab, what happened to the electrons of each element to produce the different colors of light? Explain your answers using important terms from the lesson and information provided in the laboratory.
Answer:
In Parts I and II of the lab, what happened to the electrons of each element to produce the different colors of light? ... When heat was added to the elements, the electrons absorbs the energy and moves to its excited state. Once the electron starts to fall back to a lower orbit, it emits energy in the form of light.
Happy to help ☀️Keep on shining☀️
Explanation:
If you assumed 100 total atoms in a sample, how could you relate the % values
shown in the sim into a number you could use for your calculation of average
masses?
Answer:
use the percent as the abundance and multiply it by the atomic mass and add the values together
Explanation: idk but i got it from quizlet
We have that the % values shown in the sim into a number you could use for your calculation of average masses is given as
[tex]Avg M=\frac{\sum(atomic masses of every existing element)}{100 atoms}[/tex]
From the question we are told
If you assumed 100 total atoms in a sample, how could you relate the % values shown in the sim into a number you could use for your calculation of average masses?
Generally
We will consider that the 100 total atoms as the the atoms at a 100 percent
The substance at a 100 atoms is to be calculated and is to be given as
Generally the equation for the average atomic mass is mathematically given as
[tex]Avg M=\frac{\sum(atomic masses of every existing element)}{100 atoms}[/tex]
Therefore
Now, the % values shown in the sim into a number you could use for your calculation of average masses is given as
[tex]Avg M=\frac{\sum(atomic masses of every existing element)}{100 atoms}[/tex]
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Predict the product for the following reaction:
Н,0, Н
ОН
ООО
ОН
