Answer the questions please

Answer:

D All living things grow and develop

Explanation:

the question is asking about photosynthesis and use of sugar for metabolic process like growth , use of energy for cell divison etc . this is basic for all living things.

Ammonia window cleaner materials contains a base

Window cleaner contains ammonia which is basic and used for removing dust and grease on the windows, and also for hard water stain on window.  ammonia is generally basic in nature according to the Arrhenius theory as well as Lewis acid base theory but it behave as acid only in the presence of strong acid that can extract a proton out of it. in window cleaner ammonium hydroxide is used as a window clear and because of hydroxide it is base because hydroxide is basic in nature and ammonia is alkaline in nature that's why  ammonia window cleaner materials contains a base.

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The following activities of planting more trees and prohibiting fishing during the breeding season will lead to maintain biodiversity, which means the biodiversity will remain unaffected.

Biodiversity describes the huge variety of life on Earth. It can be used to refer to all of the species in one region or ecosystem. Biodiversity refers to every living thing, including plants, bacteria, animals, and humans. It is the variation among the living organisms.

A large number of  plant species results in greater variety of crops. It results in the natural sustainability for all the life forms. Reforestation or planting more trees helps in the increase of the primary production, reduce the susceptibility and results in the increase of ecological resistance, like climate changes, etc.

Aquaculture can greatly impact the biodiversity. It is important to manage it to maintain it. Prohibiting fish farming or fishing during breeding season will help maintain the biodiversity there is no decline in fish species. Overfishing also affects the genetic diversity.

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percentage error in the student’s experiment is 0.8%

To find percentage error we use the formula I E -T I / I T I X100

so by the given data experimental value is 99.2ºC and actual theoretical value is 100.0ºC by putting the values we get 0.8% error.

To determine how closely the measured number resembles the real value, the percentage error is calculated. It is a component of a thorough error analysis. In most domains, % error is always reported as a positive figure, although in some, either a positive or negative value is acceptable.

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Answer: B

Explanation: :)

Answer: The answer is 5.076 g of iodine solid.

Explanation:

Carlos likes to bowl. He timed how long it took his ball to travel the length of the bowling alley's 18-meter lane. The ball will travel 12 m far after it had travelled for 2 s.

Length can be defined as a term used for identifying the size of an object and distance travelled by the object from one point to another point.

The S.I. unit of length is meter.

It can also be defined as the amount of time that something can last.

Thus, Carlos likes to bowl. He timed how long it took for his ball to travel the length of an 18-m lane in the bowling alley. The ball will travel 12 m far after it had travelled for 2 s.

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Your question is incomplete but most probably your full question was

Carlos likes to bowl. He timed how long it took for his ball to travel the length of a an 18-m lane in the bowling alley. He plotted the final distance and time on a line graph. Carlos drew a line from this point to the origin of the graph.

How far down the lane was the ball after it had traveled for 2 s?

6 m

9 m

12 m

18 m

Answer:

Explanation:

lithium (Li), chemical element of Group 1 (Ia) in the periodic table, the alkali metal group, lightest of the solid elements. The metal itself—which is soft, white, and lustrous—and several of its alloys and compounds are produced on an industrial scale.

Boiling point: 1,342 °C (2,448 °F)

Oxidation state: +1

Electron configuration: 2-1 or 1s22s1

Beryllium is an element with an atomic number of 4 in the periodic table. It is a bivalent and highly toxic element. The element has one of the highest melting points among the light metals. Beryllium exists in 30 different minerals, among which bertrandite, beryl, chrysoberyl, and phenacite are the most important.

The chemical element Calcium (Ca), atomic number 20, is the fifth element and the third most abundant metal in the earth's crust.

Atomic number: 20

Atomic mass: 40.08 g.mol -1

Standard potential: - 2.87 V

Electronic configuration: 4s2

Where Is Aluminum Found On The Periodic Table? Aluminum is the 13th element on the periodic table. It is located in period 3 and group 13.

Argon is a chemical element with the symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the third-most abundant gas in the Earth's atmosphere, at 0.934% (9340 ppmv).

Appearance: colorless gas exhibiting a lilac

Group: group 18 (noble gases)

Phase at STP: gas

Speed of sound: 323 m/s (gas, at 27 °C)

Answer:

Cm2 Is not a unit of volume.

Explanation:

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Non‑destructive test could be used to determine which layer is which is:

a. add a little distilled water to see which layer the water adds to.

Aqueous layer will be dissolved in water, while the organic layer not.

Water is polar substance as the аqueous layer, while organic layer is nonpolar substance.

Water is a “universal" solvent.

The ability of water to function as a versatile solvent arise from the structure of water molecules.

Other test methods are destructive.

A supercritical extraction is used to separate substances using a supercritical fluid as a solvent. The pressure and temperature of the supercritical fluid are higher than the critical point.

A separatory funnel is used to separate liquids.

In IR spectroscopy, substances have the interaction with infrared radiation.

Missing options:

a. add a little distilled water to see which layer the water adds to

b. obtain a sample of the solution in the seperatory funnel and utilize IR

c. ask the instructor if you can perform a supercritical extraction of the sample

d. obtain a sample of solution in seperatory funnel and utilize NMR

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The heat change for vaporization of 6.00 kg of water at 100°C is 13490.584 kJ.

The heat or enthalpy for vaporization is the amount of heat energy which is required to bring change in the state of a substance, such as from a liquid into a vapor or gas. It is also known as enthalpy of vaporization. The unit of enthalpy for vaporization is given in joules (J) or calories (cal).

Given data :

mass of water = 6.00 kg

Hvap = 40.7 kJ/mol

To calculate the amount of heat -

we know,

the heat required for 1 mol of water to vaporize at 100°C is 40.7 kg

and

we know molar weight of water is  18.015 gram

So,

moles of 6.00 kg water is  = 2600  

                                               18.1015

mole of water = 331.464 mol

Hence,

Heat change for vaporization is = 331.464 × 40.7

                                                     = 13490.584 kJ

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The kcal required for one year is 730kcal (kilo calories).

A calorie is a unit of energy measurement. Typically, the energy content of meals and beverages is determined in terms of calories. You must consume fewer calories each day than your body uses up in order to lose weight. On the other hand, in order to gain weight, you must eat more calories than you burn.

The daily caloric needs of adult women range from 1,600 to 2,200. Estimates for men range from 2,000 to 3,200 per day. The low end of the range may be ideal for you if you move very little or not at all during the day. If you are very active throughout the day, the high end of the range can better match your needs. The number of calories we require decreases as we age.

The kcal required for one year is:

2000 X 365 days= 730000 calories.

so as 1Kcal= 1000 calories

73000cal= 730Kcal.

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Answer:

chemical compound

Explanation:

Carbon dioxide is a chemical compound that consists of two oxygen atoms and one carbon atom

The saline solution has a density of 1.045 g/mL.

Pure water has a density of 1.000 g/mL.

The saline solution has larger mass, but the volumes are equal.

d = 1.000 g/ml ×25.6g / 24.5g

d = 1.045 g/mL.

The saline solution has a density of 1.045 g/mL.

Because it is a nontoxic, isotonic solution that does not impair healing, normal sterile saline is recognised as the most suitable and preferred cleansing solution.

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Answer:

3HCl + Cr (HCO3)3 --> CrCl3 + 3CO2 + 3H2O

The histone octamer has a total charge of +146 at pH 7 if histidine residues are assumed to be uncharged.

There are 9 negatively charged (Asp + Glu) and 26 positively charged (Arg + Lys) residues in total on histone H2B.

The net charge on H2A is 26 - 9 = +17.

There are 10 negatively charged (Asp + Glu) and 28 positively charged (Arg + Lys) residues in total on histone H2B.

The net charge on H2B is 28 - 10 = +18.

There are 11 negatively charged (Asp + Glu) and 31 positively charged (Arg + Lys) residues in total on histone H3.

The net charge on H3 is 31 - 11 = +20.

There are 7 negatively charged (Asp + Glu) and 25 positively charged (Arg + Lys) residues in total on histone H4.

The net charge on H4 is 25 - 7 = +18.

2 x (17 + 18 + 20 + 18) = +146 is the total charge of the histone octamer.

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0

All atoms are made up of particles known as protons, neutrons, and electrons.

Mass Number

The mass number of an atom is most commonly given in amus. Amu stands for atomic mass unit. In an atom, a proton = 1 amu, a neutron = 1 amu, and an electron = 0 amu. Since atoms are so small, it is hard to measure a singular in normal units such as grams. So, instead, scientists use amus. Comparatively, protons and neutrons are far larger than electrons. This is why electrons are given a mass of 0 amu. Of course, electrons do technically have mass, but that mass is so small that it is negligible in many calculations.

Counting Neutrons

When given the atomic number and mass number, it is easy to find the number of neutrons. The atomic number of an element tells you how many protons there are. The mass number gives you the mass of the atom in amus; this number is equal to protons + neutrons. This means that mass number - atomic number = neutron number.

So, we can set up a very simple equation to find the number of neutrons.

Most hydrogen atoms have no neutrons.

Answer:

Explanation:

Scientists use the periodic table to quickly refer to information about an element, like atomic mass and chemical symbol. The periodic table's arrangement also allows scientists to discern trends in element properties, including electronegativity, ionization energy, and atomic radius.

Answer:

Scientists use the periodic table to quickly refer to information about an element, like atomic mass and chemical symbol. The periodic table's arrangement also allows scientists to discern trends in element properties, including electronegativity, ionization energy, and atomic radius.

Explanation:

Answer:

intruducing nuclear in a country like nepal where the knowledge of nuclear science is limited is a major task.

Explanation:

(maybe it will help if not sorry because my answer is wrong)

Nepal is a landlocked country that has been facing challenges in meeting its energy demand. The country is heavily dependent on imported fossil fuels, which are expensive and have negative environmental impacts.

Nuclear energy is the energy that is released from the nucleus of an atom through a process called nuclear reaction. Nuclear reactions can occur spontaneously or can be induced by bombarding the nucleus with particles such as neutrons.

However, Nepal currently does not have any nuclear power plants, and the country has not developed any nuclear energy infrastructure. Therefore, the development of nuclear energy in Nepal would require significant investment in terms of time, money, and human resources. Additionally, there are concerns about the safety and security of nuclear energy, and these issues would need to be addressed before nuclear energy could be developed in Nepal.

Despite these challenges, there are some potential benefits to the development of nuclear energy in Nepal. Nuclear energy has the potential to provide a reliable source of energy that is not dependent on imported fossil fuels. Additionally, nuclear energy is a low-carbon source of energy that could help Nepal reduce its greenhouse gas emissions and mitigate the impacts of climate change.

In conclusion, the development of nuclear energy in Nepal is a complex issue that requires careful consideration of the potential benefits and risks. While nuclear energy could provide a reliable and low-carbon source of energy, there are significant challenges that would need to be addressed before nuclear energy could be developed in Nepal.

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The compound C3H7Cl chloropropane has two constitutional isomers: 1-chloropropane and 2- chloropropane as shown in the picture.

so we can observe only two isomers of C3H7Cl by position chlorine on C-1 and C-2 atom.

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According to the research, the correct option is B. They increase the OH- concentration in solution is a property of all bases.

It is the substance that has alkalinity that, when in solution, increases the concentration of hydroxyl ions (OH-) and establishes combinations with acids for the development of salts.

They are soluble in water and usually have a bitter taste and by providing hydroxyl ions to the medium, they are capable of neutralizing acids.

Therefore, we can conclude that according to the research, the correct option is B. They increase the OH- concentration in solution is a property of all bases.

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Elements from group 1 have the least chances to attract electrons due to their low electronegativity.

The atom's tendency to attract electrons in a molecule is known as electronegativity. The trend of electronegativity on the periodic table is as follows:

This means that the least electronegative element is from group 1 elements, specifically Cesium and Francium which have electronegativity of 0.79 and 0.70, respectively. In general, group 2 elements have higher electronegativity compared to group 1 elements. The three elements with the highest electronegativity are nitrogen, oxygen, and fluorine which have 3.04, 3.44, and 3.98, respectively.

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The fossil fuel which normally contains contains high carbon sources. When it burnt it'll produce a lot of carbon dioxide increasing in its concentration in the atmosphere. But the ratio of 14C to 12C is decreasing because the age of those fossil fuel are so high that the carbon's content is ruined.

These are Extracted by Humans through the method of Drilling and Mining.

Thus from the above conclusion we can say that, ratio of 14C to 12C is decreasing because the age of these fossil fuel are so high that the carbon's content is ruined.

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Answer:

independent variable is what you change in a science experiment, dependent variable is what's being measured in a science experiment. any characteristics, number, or quantity that can be measured or counted. A variable may also be called a data item.

A constant is a quantity that does not change. Although you can measure a constant, you either cannot alter it during an experiment or else you choose not to change it. Contrast this with an experimental variable, which is the part of an experiment that is affected by the experiment.

for materials and equipment, can be a ruler, and a data chart to put information, and a timer if needed,

you will record the amount of baking powder you have, and make observations of making sure you have the right amount of baking powder.

also make sure your experiment is safe.

I guess you can use a data chart to keep track of your information, and you can make a hypothesis, conlusion, BUT NO OPINION, make sure to know that before starting a experiment

An example of a chemical change is water undergoing electrolysis: liquid water becoming oxygen and hydrogen molecules.

In chemistry, changes are classified into two: physical and chemical.

A physical change occurs when a substance or object changes its appearance, phase, or is used in a mixture. More importantly, a physical change does not change the molecular structure of a substance. These three are examples of physical changes in water, wherein the changes are on their phases only:

water freezing: liquid water becoming solid water

water boiling: solid water becoming gaseous water

water evaporating: liquid water becoming gaseous water

On the other hand, a chemical change takes place when the original substance's of molecules are taken apart and put back together into new combinations that are different from the original combinations. An example of this is water undergoing electrolysis: liquid water becoming oxygen and hydrogen molecules, wherein a compound of water molecule is being break down into different molecules.

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Answer: An atom

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