blank is most if the compounds that make up living things?

Answer:

52.2g of KCl would be left

The mass of KCl will remain despite the solution is been heated

Explanation:

When you are heating a solution, just the solvent (In this case, water), will be evaporated and, in theory, the mass of KCl will remain despite the solution is been heated.

Now, the mass of KCl that you can obtain from 350mL of a 2.0M solution will be:

Moles KCl:

350mL = 0.350L * (2.0mol / L) = 0.700 moles

Mass KCl -Molar mass: 74.55g/mol-:

0.700mol * (74.55g/mol) = 52.2g of KCl would be left

Answer: Homogeneous mixtures are mixtures that are completely mixed where you cannot see any separate parts. This would include stuff like Gatorade, water, coffee, and paint. Heterogeneous mixtures are mixtures that are uneven and you can see individual parts.Gatorade usually comes in one type of color, one type of flavor. Gatorade. Because it's made up of different components, it's actually a homogenous mixture or homogeneous mixture.Gatorade Thirst Quencher contains water, sucrose (table sugar), dextrose, citric acid, natural flavor, sodium chloride (table salt), sodium citrate, monopotassium phosphate, and flavoring/coloring ingredients. Some Gatorade flavor variations used to contain brominated vegetable oil as a stabilizer. Hope this helps have a nice day❤️

Explanation:

Answer:

See explanation

Explanation:

Renewable energy resources refers to energy resources  that can not be depleted such as wind, solar, biomass etc.

Non-renewable energy resources refers to those energy resources that can be depleted such as fossil fuels.

Globally, it has been established that energy from renewable sources costs less than energy from nonrenewable(especially fossil fuel) sources.

According to Forbes, 2019, "The worldwide weighted average cost of electricity from solar power concentration fell by 26%, that of bioenergy reduced by 14%, solar photovoltaics, geothermal, onshore, as well as offshore wind, fell by 14%, and hydropower by 12%.".

This shows us that renewable energy remains the cheapest alternative in terms of energy cost.

Answer:

8.85 because im smart

A molecule is, simply put, two or more atoms (usually covalently) bonded to one another. The atoms in the molecule can be of different elements, such as in H2O or PCl3, or of the same elements, such as in F2 or O3.

So, B would be the correct answer.

The correct option is B.

B. a substance that is formed when two or more atoms join

The following information should be considered:

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Answer:

b) a charged particle

Explanation:

Answer:

Selenium

Explanation:

One way to figure this out is to count the electrons and add them up.

2+2+6+2+6+2+10+4 = 34 electrons

A neutral atom has the same number of electrons and protons. Protons tell us the atomic number of an element. Element number 34 is Selenium.

Another way to figure it out is to look at just the highest "s" or "p" level of the electron configuration, and then see which element corresponds to that. This element has a 4s and a 4p, so I will look at 4p. The configuration is 4p4, so I will look at the 4th row of the periodic table (4p4) in the "p" block (4p4) and the 4th element in the "p" block (4p4). That's selenium :)

Answer:

0.13 grams of O2

Explanation:

Just did worksheet

Answer:

one-half

Explanation:

cuz for a first order reaction is a half life independent of concentration and constant over time

Answer:

The answer is Yes

Explanation:

Barium Hydroxide + Hydrogen Bromide = Barium Bromide + Water =

Double Displacement

Nitric acid, is a highly corrosive mineral acid. The pure compound is colorless, but older samples tend to acquire a yellow cast due to decomposition into oxides of nitrogen and water.

There are THREE different elements and a total of FIVE atoms in nitric acid.

The formula for nitric acid is HNO3. This means there is one atom of hydrogen, one atom of nitrogen, and three atoms of oxygen in one molecule of nitric acid.

So, Thus, your answer will be FIVE if you're counting the molecules but if you are counting the elements then it is THREE.

-Snooky

Answer:

yes

Explanation:

Unlike a gas, a liquid does not disperse to fill every space of a container, and maintains a fairly constant density. A distinctive property of the liquid state is surface tension, leading to wetting phenomena. Water is, by far, the most common liquid on Earth.

hope this helps

brainliest?!

Answer:

This relationship between temperature and pressure is observed for any sample of gas confined to a constant volume. I find that temperature and pressure are linearly related. If the temperature on the kelvin scale increases by a certain factor, the gas pressure increases by the same factor. On the can is the warning “Store only at temperatures below 120 °F (48.8 °C). Do not incinerate.” The can contains an amount of isobutane gas at a constant volume, so if the temperature increased by heating, the pressure will increase proportionately. High temperature could lead to high pressure, causing the can to burst. Just like,  The gas in the can is initially at 24°C,  and the can has a volume of 350 mL.  If we fill a balloon with air and seal it,  If we put the balloon in a refrigerator, the gas inside gets cold and the balloon shrinks. If we make the balloon very cold, it will shrink a great deal, and it expands again when it warms up. Temperature is sometimes measured with a gas thermometer by observing the change in the volume of the gas as the temperature changes at constant pressure. A volume change caused by a temperature change at constant pressure means we should use Charles’s law. Decreasing the volume of a contained gas will increase its pressure, and increasing its volume will decrease its pressure. In fact, if the volume increases by a certain factor, the pressure decreases by the same factor, and vice versa.  The earth’s atmosphere exerts a pressure, as does any other gas. Although we do not normally notice atmospheric pressure, we are sensitive to pressure change, for example, when your ears “pop” during take off and landing while flying, or when you dive underwater.  Although the force of each collision is very small, any surface of appreciable area experiences a large number of collisions in a short time, which can result in a high pressure. In fact, normal air pressure is strong enough to crush a metal container when not balanced by equal pressure from inside the container.  Atmospheric pressure is caused by the weight of the column of air molecules in the atmosphere above an object, such as the tanker car. At sea level, this pressure is roughly the same as that exerted by a full-grown African elephant standing on a doormat, or a typical bowling ball resting on your thumbnail. These may seem like huge amounts, and they are, but life on earth has evolved under such atmospheric pressure. If you actually perch a bowling ball on your thumbnail, the pressure experienced is twice the usual pressure, and the feeling is unpleasant.

Explanation:

A contained gas's pressure rises as its volume decreases, while its pressure falls as its volume rises. In fact, if the volume increases by a certain factor, so does the pressure, and vice versa. The earth's atmosphere, like any other gas, exerts pressure.

Boyle's Law describes the relationship between pressure and volume. The volume of a gas decreases as the pressure on it increases because the gas particles are forced closer together. As the pressure on a gas decreases, the volume of the gas increases because the gas particles can now move farther apart.

As a result, volume is inversely proportional to pressure. A straight line is obtained by plotting pressure (p) against the reciprocal of volume (1/V), the gradient of which is the constant in Boyle's Law. The number of gas particles per unit volume increases as volume decreases.

The pressure-volume relationship of a confined gas is inversely proportional. This relationship is demonstrated by the data collected and the graphs plotted.

Thus, A contained gas's pressure rises as its volume decreases, while its pressure falls as its volume rises.

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Answer:

the average weight of a frog is 0.8 ounces, so your answer would be 4

Answer:

one hundred and one

Explanation:

Answer:

A

Explanation:

Florine F and Bromine Br these two elements have same physical and chemical properties. Hence option A is correct.

Atom is smallest entity of a body. Body is made up of atoms. it is basic building block of a body. An atom consist of electrons, protons and neutrons as sub atomic particle. whole mass of the atom is concentrated at the center of the atom which we call it as nucleus, nucleus consist of proton and neutron. Electron revolve around the nucleus at determined(fixed) orbit. Total number of protons in the atom decides the atomic number and  the elements in the periodic table.

The electrons which are completely filled orbitals are called as core shell electrons and which are not filled completely are called as valence electron. valence electrons are responsible for physical and chemical properties of the element. Elements which are on same column in periodic table have same number of valence electrons . Hence they have same properties.

Chlorine, Florine and bromine comes in halogen group. it require only one electron to complete its Octet rule. chemical and physical properties are decided by the valence electron of the element. As Florine and Bromine has same valence electron as chlorine. their properties also likely to be same.

Hence option A is correct.

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The movement of water on and above the earth's surface is called the hydrologic cycle, or the water cycle. Hope this helps!

Answer:

the answer is electron....

Answer:

10.42

Explanation:

1.2×10²⁴atoms are in a 12.0g sample of lithium.  It is also the smallest piece of substance with chemical element-like characteristics.

The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. As a result, the atom serves as the fundamental unit of chemistry.

Space makes up the majority of an atom. The remainder is made up of a cloud of electrons with negative charges around a positive-charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense.

Number of atom= number of moles ×6.022×10²³

number of moles =  12.0g /6=2 moles

Number of atom= 2 ×6.022×10²³=1.2×10²⁴atoms

Therefore, 1.2×10²⁴atoms are in a 12.0g sample of lithium.

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Answer:

8 moles of oxygen.

Explanation:

The chemical formula for barium hydroxide is Ba(OH)₂

This means one mole of barium hydroxide contains one mole of barium, two moles of hydrogen, and two moles of oxygen. If you have four moles of Ba(OH)₂ you will have four times the amount that is found in one mole.

4 moles of Ba(OH)₂ will have 8 moles of oxygen.

The number of moles of oxygen atoms we have in the compound is 8 moles .

The chemical equation for barium hydroxide is as follows:

Ba(OH)₂

According to the compound we have 1 atom of barium, 2 atoms of oxygen and 2 atoms of hydrogen.

Therefore, 4 moles of the compound can be represented as follows;

4 Ba(OH)₂

This means we have 4 atoms of barium, 8 atoms of oxygen and 8 atoms of hydrogen.

Therefore, we have  8 moles of oxygen atoms or 4 moles of oxygen molecules.

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Answer:

All particles have energy, and the energy varies depending on the temperature the sample of matter is in, which determines if the substance is a solid, liquid, or gas. Solid particles have the least amount of energy, and gas particles have the greatest amount of energy.

Answer:

strong winds that blow in short spurts over a small distance

Explanation:

Generally, the most common factor that causes the largest waves in the ocean is winds. this is also called wind-driven waves of the ocean when the surface wind flows on the surface of the ocean, this disturbance creates the friction between surface wind and surface of the ocean which creates waves in the ocean

Answer:

B

Explanation:

k-12 test

Answer:

Electrical Conductivity of the substance

Explanation:

Ionic substances do not conduct electricity in their solid state however they are good conductor of electricity when dissolved in water or in their molten state.

A test can be carried out to see if the substance matches the property above.

Answer:

the attraction water molecules have to other surfaces

Explanation:

Adhesion is defined as  the attractive forces between unlike substances, e.g water moving up a capillary tube.

Adhesion is the tendency of dissimilar particles or surfaces to cling to one another(Wikipedia).

So, what we mean by adhesion in this context, is the attraction water molecules to other surfaces.

Answer:

Calcium

Explanation:

It has similar properties as Magnesium (Mg) and Strontium (Sr)

The Atomic number of Calcium (Ca) is 20

The Atomic number of Krypton is 36

The Atomic number of Magnesium is 12

12 < 20 < 36