What is the boiling point (in °C) of a 0.195 m
aqueous solution of K2S?
Enter your rounded answer with
3 decimal places.
Kb for water = 0.512 °C/m


Please hurry

Answer:

2 g/cm3

Explanation:

Density is a measure of a substance's mass over its volume.

d = m/v

Therefore d = 60g/30cm3 = 2 g/cm3

Answer:

No

Explanation:

A mixture is when two or more substances combine physically together. However, in water, two hydrogen atoms combine with one oxygen atom chemically, forming a new substance that has properties different from hydrogen alone or oxygen alone. ... Therefore, water is not a mixture

Answer:

1 mole of magnesium are required to react with 2.0 mol of hydrochloric acid.

Explanation:

The balanced reaction is:

Mg + 2 HCl → MgCl₂ + H₂

The law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products. That is, the law of conservation of mass implies that the sum total of charges before and after the chemical reaction remains constant.

The relationships between the quantities of reactants consumed and products formed depend directly on this conservation law, and therefore can be determined by an equation that describes them. This equality is called the stoichiometric equation.

In this case, by stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), you have:

Then, 1 mole of magnesium are required to react with 2.0 mol of hydrochloric acid.

Answer:

1 mole of magnesium, Mg

Explanation:

The balanced equation for the reaction is given below:

Mg + 2HCl —> MgCl₂ + H₂

From the balanced equation above,

We can see clearly that 1 mole of Mg requires 2 moles of HCl.

Thus, 1 mole of magnesium, Mg is needed for the reaction.

Answer:

When the carbon dioxide concentration goes up, temperature goes up. When the carbon dioxide concentration goes down, temperature goes down

Explanation:

Answer: when the carbon dioxide concentration goes up the temperature goes up. when it goes down the temperature goes down

Explanation:

Answer:

Initial velocity (u) = 0 m/s

Final velocity (v) = 60 m/s

Time (t) = 7 sec

Acceleration (a) = ?

a = (v-u)/t

a = (60-0)/7

a = 60/7

a = 8.57 m/s²

Answer:

Explanation:

Every A will be paired with a T, and every C with a G and vice versa (T to A, and G to C)

So the first letters in the sequence are ATGGG. So the pair will be TACCC.

Answer:

Here's the answer pretty thang = 140 N

Explanation:

List Known Values-

35N

4M

Formula-

W=FJ

Substitution-

W= 3.5N (4m)

Answer & Units-

140 N

Bobby perform in pushing a 35 N crate a distance of 4 meters the work done by him is 140 joules per second.

The work is something which need energy to be done it can be any physical or chemical energy that can be calculated with the help of Newton law.

Work is calculated by multiplying the force required for the work  by the amount of movement of substance or object.

                    W = F × d   here, W = work

                                                  F = force

                                                  d = distance

Substituting the value in the formula,

                     W = 35 × 4  

                      W = 140 joules

Newton-meter is the same thing as a joule so the unit is joules.

Therefore, bobby perform in pushing a 35 N crate a distance of 4 meters the work done by him is 140 joules per second.

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Answer:

b,c,f,g

Explanation:

it makes the most sense plus i just took the test <3 good luck

With an increase in the kinetic energy of the solid molecule the intermolecular bonds become weaker, temperature increases, melting and molecules vibrating faster are changes.

Kinetic energy is the form of the energy that is present in an entity in motion. When the kinetic energy is increased then the temperature of the particles increases and leads to evaporation.

The increased kinetic energy weakens the intermolecular bonds of the liquid particles and the molecules of the particles start vibrating fast.

Therefore, option b. intermolecular bonds become weak, option e. evaporation, option f. temperature increases and option h. molecules vibrate faster are the changes.

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Answer:

The growing human population is putting increasing demands on natural resources.

Explanation:

In an ecosystem, the most important reason for people to carefully manage natural resources is that the  growing human population is putting increasing demands on natural resources.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

the conjugate base of the compound is

C6h6O2/6-

Explanation:

subscript

The conjugate base of [tex]\rm HC_6H_6O_6^-\; is \; C_6H_6O_6^-[/tex].

Conjugate acid is the acid that donates a hydrogen ion to a base, conjugate acid contains a hydrogen ion.

The base that gains a hydrogen ion from a conjugate acid is called the conjugate base.

The acid is NH4 converts into a conjugate base NH3-

When a conjugate acid donates a hydrogen ion, it converts into the conjugate base.

Thus, the conjugate base is [tex]\; C_6H_6O_6^-[/tex]

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Answer:

electroluminescence is a production of light by the flow of electrons, as within certain crystals. An example is at most resataurants with a bright sign that either says open or closed.

Explanation:

Answer:

Sound Energy is a form of Mechanical Energy

Answer:

Trail Mix

Explanation:

The best description for the snack that Ben is eating would be Trail Mix. This is a very common snack for hikers, hence the name, since it is very healthy and great for taking on hikes since it does not get affected by the sun. This snack was originally called GORP which stands for "good old raisins and peanuts" because the snack originally contained only raisins and peanuts. It has since changed to include various different ingredients such as a variety of nuts, chocolate pieces, dried fruit, cereal etc.

Answer:

The sugar in DNA is deoxyribose. ... Nucleotides in DNA contain four different nitrogenous bases: Thymine, Cytosine, Adenine, or Guanine. There are two groups of bases: Pyrimidines: Cytosine and Thymine each have a single six-member ring.

Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA. The four nucleotides have different base structures, but they are all composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group.

Nucleotides are organic compounds made up of a phosphate and a nucleoside. They function as monomeric units of the deoxyribonucleic acid and ribonucleic acid polymers, which are both crucial macromolecules for all kinds of life on Earth.

Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA. The four nucleotides have different base structures, but they are all composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group.

The quantity of phosphate residues that a nucleotide has determined its name. Adenosine triphosphate, for instance, is the name of a nucleotide that consists of an adenine base and three phosphate residues (ATP). Adenosine diphosphate would be the nucleotide if it has two phosphates (ADP).

Thus, Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA.

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Answer:

The correct option is (c).

Explanation:

Given that,

Mass of iron, m = 3 kg = 3000 g

The temperature of ice increases from 20° C to 25°C.

The specific heat of iron is 0.45 J/g°C

We need to find the energy required to raise the temperature. The formula is given by :

[tex]Q=mc\Delta T\\\\Q=3000\times 0.45\times (25-20)\\\\Q=6750\ J[/tex]

So, 6750 J of energy is required to raise the temperature or iron.

Answer:

A is more dense

Explanation:

The is because you can find the density of anything by dividing the Mass by volume A is .7428 and B is .7051 . There fore A is denser .

Answer:

I believe that it would be copper because copper is all of those things.

Explanation:

Answeruuuuu it's b I think

Answer:

(dunno exactly but i put:)

Answer:

B.

Solar energy is converted into chemical potential energy, which is found in the products like glucose.

Explanation:

According to photosynthesis phenomena ,the statement which compares energy transformations in ecosystem  within photosynthetic organisms is statement B.

It is defined as a process by which plants and other photosynthetic organisms convert the light energy in to chemical energy  through the process of cellular respiration.

Some of the energy which is converted  is stored in molecules of carbohydrates like sugar and starches  which are made up of from carbon dioxide and water . Photosynthetic organisms which can perform photosynthesis  are algae and cyanobacteria. Photosynthesis is largely responsible for producing and maintaining the content of oxygen in earth's atmosphere.

The process begins with proteins absorbing light energy  which are called reaction centers and contain a green pigment which is called chlorophyll . In plants ,these pigments are present inside organelles called chloroplasts while in bacteria they are present in plasma membrane.

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Answer:

Decomposers (either Secondary Consumer or Tertiary Consumer)

Explanation:

Decomposers eat dead materials and break them down into chemical parts. ... They keep the ecosystem free of the bodies of dead animals or carrion. They break down the organic material and recycle it into the ecosystem as nutrients. Vultures, Blowflies, hyenas, crabs, lobsters and eels are examples of scavengers.

Answer:

hope this helped.

Explanation:

Sexual reproduction just means combining genetic material from two parents. Asexual reproduction produces offspring genetically identical to the one parent.

Answer:

13

Explanation:

proton plus neutron equal to atomic mass

Answer:

The air in the atmosphere consists of nitrogen, oxygen, which is the life-sustaining substance for animals and humans, carbon dioxide, water vapour and small amounts of other elements (argon, neon, etc.). Higher in the atmosphere air also contains ozone, helium and hydrogen.

Explanation:

Answer:

nitrogen, oxygen, carbon dioxide, water vapour, ozone, helium, and hydrogen.

Explanation:

Answer: as the number of predators increases, more prey are captured. as a result the prey population starts to decrease.

Answer:

hi

Explanation:

Chemical reactions are an integral part of technology, of culture, and indeed of life itself. Burning fuels, smelting iron, making glass and pottery, brewing beer, and making wine and cheese are among many examples of activities incorporating chemical reactions that have been known and used for thousands of years. Chemical reactions abound in the geology of Earth, in the atmosphere and oceans, and in a vast array of complicated processes that occur in all living systems.

-facts

Answer:

can be used in fireworks, flares and sparklers

Explanation:

as it burns in air it ignites with bright light

Answer:

Blank 1 - Microscope

Blank 2 - Cell Theory

Explanation:

Answer:

microscope. and cell theory

Explanation:

with the invention of the microscope. scientists were able to create cell theory

Explanation:

babe I wish I knew I would tell you

Answer:

Not all men are like this. It depends on how they were raised