You are given a sample of a colourless liquid. Describe how you would show that it was pure water. FASTEST ANSWER GETS BRAINLIEST

Answer:

According to the evolution theory, the organisms that are better adapted have more chances to survive and to reproduce, thereby they also have more chance to perpetuate their own genes in the next generation. This statement can be divided into three properties. First, the adaptation (or adaptive fitness) of one organism is the ability to make use of the available resources in particular environmental conditions. Second, survival is defined as the ability to identify dangerous (environmental) conditions. Finally, reproduction can be defined as the ability to leave descendants (i.e., own offspring). The most important evolutionary forces that drive this process are mutations and recombination that generate biodiversity, these forces are capable of increasing the adaptive fitness in the next generation and generating speciation.

The most important evolutionary forces that drive this process are mutations and recombination that generate biodiversity.

According to the evolution theory, the organisms that are better adapted have more chances to survive and reproduce, thereby they also have more chances to perpetuate their own genes in the next generation.

The most important evolutionary forces that drive this process are mutations and recombination that generate biodiversity, these forces are capable of increasing the adaptive fitness in the next generation and generating speciation.

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Answer:

The meter, symbol m, is the SI unit of length

The second, symbol s, is the SI unit of time.

m - metre

s- second

The SI base units for length is meter and time is second.

SI unit stands for international system of units.

It is defined as a metric system that is used as a measurement standard expected globally.
There are basically seven SI based quantities

Thus, the SI base units for length is meter and time is second.

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Answer:

17.37 grams

Explanation:

mass=moles × molar mass

mass = 0.965 × 18

mass = 17.37g

Ans180.158 g

Molar mass (glucose): 6×12.0011 g+12×1.00794 g+6×15.9994 g=180.158 g,1.5×10−1mol ×180.158 g/mol =27 g. 6 × 12.0011 g + 12 × 1.00794 g + 6 × 15.9994 g = 180.158 g , 1.5 × 10 − 1 mol × 180.158 g/ mol = 27 g.wer:

Explanation:

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The molar concentration of the glucose solution at the end of the procedure is 0.224 M.

In the first step, we dissolve 263.1 g of glucose (molar mass=180.16 g/mol) in enough water to make 500.0 mL of solution. We can calculate the molarity of the initial solution using the following expression.

[tex]M = \frac{mass\ glucose}{molar\ mass\ glucose \times liters\ solution } = \frac{263.1 g}{180.16 g/mol \times 0.5000 L } = 2.921 M[/tex]

In the second step, we take a volume (V₁) of 19.2 mL of the 2.921 M (C₁) solution and add enough water to make 250.0 mL (V₂) of dilute solution. We can find the concentration of the dilute solution (C₂) using the dilution rule.

[tex]C_1 \times V_1 = C_2 \times V_2\\C_2 = \frac{C_1 \times V_1}{V_2} = \frac{2.921 M \times 19.2 mL}{250.0 mL} = 0.224 M[/tex]

The molar concentration of the glucose solution at the end of the procedure is 0.224 M.

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Answer:

I believe the answer is energy is released when an atom is split apart.

Explanation:

Nuclear fission is when the nucleus of an atom splits into two or more smaller nuclei. I hope I helped, please correct me if I'm wrong!

Answer:

Living organisms do contain carbon compounds. This is true.

Explanation:

Answer:

The percent composition for nitrogen in chromium(III) nitrate is 6%.

The mass percentage of nitrogen in chromium (III) nitrate. The percent composition for nitrogen in chromium(III) nitrate is 6%.

A bulk of earth's atmosphere is occupied by nitrogen that is 78.1 percent by volume, it is inert at standard temperature and pressure condition called as azote, is a crucial part of food and fertilizer production.

Nitrogen gas or N is nonmetallic, colorless, odorless and tasteless gas,  atomic number is 7 and atomic weight of 14.0067, its density of 1.251 grams/liter at 0 degree C ,  its specific gravity of 0.96737.

Nitrogen gas is used in industrial and production due to its abundance and nonreactivity, nitrogen gas be used in extinguish fires, the oxygen or moisture sensitive substances like Iron, steel and electronic components, are produced in a nitrogen atmosphere.

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Answer:

An atom

Explanation:

An atom is the basic unit of a chemical element. Atoms are made out of three main parts: protons, neutrons and electrons.

step by step

Na(sodium)=2.8.1

Cl (Chlorine)=2.8.7. sodium will give the chlorine the 1 valence electron to become stable ions.

answer

pottasium. (2.8.8.1) and Flourine(2.7)

Answer:

1 mile = 1,609 meters

3.02E6 mi^2 x (1609^2m^2/mi^2) = 7.818E12 m^2

1 in= 2.54 cm => 2 in = 5.08cm = .0508m

7.818E12 m^2 x .0508m = 3.97E11 m^3

1 cubic meter = 1,000,000 cubic centimeters

3.97E11 m^3 x (1,000,000 cm^3 / m^3) = 3.97E17 cm^3

1000 cm^3 = 1L

3.97E17 cm^3 x (1L / 1000cm^3) = 3.97E14 L  

or 3.97 x 10^14 L

convert to grams since 1L is 1000g

(3.97x10^14) x1000g which is 3.974x10^ 17g which is the final ans

Explanation:

The water that can be held is 3.974x10¹⁷g

The measures given should be first given to the units in the metric system. In this way, the mile will be converted to meters. Then,

Here,

1 mile = 1,609 meters

So,

3.02 m² x (1609m²/m²) = 7.818E12 m²

According to the metric system, inches will also be converted to meters. So

1 in= 2.54 cm

=> 2 in = 5.08cm = .0508m

Now, Equating these equations,

7.818 m² x .0508m = 3.97 m³

We know that

1 cubic meter = 1,000,000 cubic centimeters

According to that,

3.97 m³ x (1,000,000 cm³ / m³) = 3.97 cm³

Also, we know that,

1000 cm³ = 1L

3.97 cm³ x (1L / 1000cm³) = 3.97 x 10¹⁴ L

Now, converting this value to grams as 1L is 1000g

(3.97x10¹⁴) x1000g = 3.974x10¹⁷g.

Therefore, 3.974x10¹⁷g is the final answer.

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Answer:

a. C₈H₁₄N₂O₂ = 107.209 g/mol

b. Approximately 1.4 × 10⁻⁴ moles

c. 8.423 × 10¹⁹ molecules

d. 1.685 × 10²⁰ atoms of oxygen

e. 1.685 × 10²⁰ atoms of nitrogen

Explanation:

The chemical formula is found as follows;

X×12 + 14×1 + 14×2 + 16×2 = 170.209

Where:

X = Number of carbon atoms per mole of C&H₁₄N₂O₂

Therefore;

X × 12 = 170.209 - 74 = 96.209

X = 96.209/12 = 8.017 ≈ 8

The chemical formula is C₈H₁₄N₂O₂

b. The number of moles, n, is found as follows;

[tex]n = \dfrac{Mass \ of \ sample}{Molar \ mass \ of \ the \ sample} = \dfrac{15 \times \dfrac{1}{1000} }{107.209} = 1.4 \times 10^{-4} \ moles[/tex]

c. The number of molecules, N, is given by the following relation;

N = [tex]N_A[/tex] × n

Where:

[tex]N_A[/tex] = Avogadro's number = 6.02 × 10²³ molecules

∴ N = 6.02 × 10²³ × 1.4 × 10⁻⁴ = 8.423 × 10¹⁹ molecules

d. The number of oxygen atom per molecule of C₈H₁₄N₂O₂ = 2 oxygen atoms

The number molecules of C₈H₁₄N₂O₂ in 15 mg of C₈H₁₄N₂O₂ = 8.423 × 10¹⁹ molecules

Therefore;

The number of oxygen atom per 15 mg of C₈H₁₄N₂O₂ = 2 × 8.423 × 10¹⁹  oxygen atoms

The number of oxygen atom per 15 mg of C₈H₁₄N₂O₂  = 1.685 × 10²⁰ atoms of oxygen

e. The number of nitrogen atoms are equal to the number of oxygen atoms per molecule of C₈H₁₄N₂O₂, therefore;

The number of nitrogen atoms = 1.685 × 10²⁰ atoms of nitrogen.

Answer:

ultraviolet lights have shorter wavelengths and higher frequencies

Answer:

38660.16 J

Explanation:

From the question,

Heat gained by water is given as

Q = cm(Δt)..................... Equation 1

Where c = specific heat capacity of water, m = mass of water, Δt = temperature change of water.

Given: c = 4.184 J/g.°C, m = 1320 g, Δt = 7 °C.

Substitute these values into equation 1

Q = 4.184×1320×7

Q = 38660.16 J

Hence the heat energy gained by the water is 38660.16 J

Answer:

Hi there!

The correct answer is 2.29 x [tex]10^{24}[/tex] molecules

Explanation:

To convert from the moles to molecules:

1 mole = 6.022 x 10²³ molecules

so basically you multiply 3.8 by 6.022 x 10²³

and you get: 2.29 x [tex]10^{24}[/tex]

Answer:

Larger atoms tend to be more polarizable than smaller ones because their outer electrons are less tightly bound and are therefore more easily perturbed. Hydrogen bonds are especially strong dipole–dipole interactions between molecules that have hydrogen bonded to a highly electronegative atom, such as O, N, or F.

Explanation:

Answer:

B.Some potential energy was converted into thermal energy due to friction.

The fact that kinetic energy is not greater than potential energy is due to the fact that during motion, kinetic energy loses some of its energy as a result of heat, friction, and light energy. These losses do not occur with potential energy, which is why potential energy is always greater than kinetic energy.

The energy that an object has as a result of motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration until its speed alterations.

There is no initial potential energy since the initial velocity is zero. There is no final potential energy since the end height is zero. This indicates that the total kinetic energy and total potential energy are equal. Both parties have the ability to cancel the mass.

Due to the principle of energy conservation, the initial potential energy and the end kinetic energy will be equal just before the object strikes the ground.

Thus, kinetic energy is not greater than potential energy is due to the fact that during motion.

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Answer: B.

Explanation:

CH3(CH2)3COOH, is the chemical formular for pentanoic acid and the structural formular is seen in Option B.

Answer:

Hello

Coefficients are 1,3,2,1

Explanation

Answer:

magnet

Explanation:

Answer:

magnet

Explanation:

Answer:

Ebola is a rare but deadly virus that causes fever, body aches, and diarrhea, and sometimes bleeding inside and outside the body. As the virus spreads through the body, it damages the immune system and organs. Ultimately, it causes levels of blood-clotting cells to drop. This leads to severe, uncontrollable bleeding.

Explanation:

Answer:

polar covalent bonds

Explanation:

Phosphorus trichloride is a chemical compound of phosphorus and chlorine, having the chemical formula PCl 3. It has a trigonal pyramidal shape, owing to the lone pairs of electrons on the phosphorus atom.

Chlorine is more elctronegative than phosphorus . Phosphorus has a lone pair of electrons and every chlorine atom has three pairs of electrons . The molecule is not symmetrical as the shared electron pairs are closer to the chlorine atoms than the phosphorus atoms , the chlorine atoms are shifted towards one side of the center of the molecule , thus a net dipole effect is created. This is the reason why the molecule is polar .

Answer:

When the kinetic energy of particles in liquid increases, the particles are pushed farther apart. This can result in the expansion of matter. More pressure will be exerted on the container in which this liquid is stored.

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Answer:

A

Explanation:

the same number of molecules occupy a small space

Answer:

The universe is expanding

Explanation:

As long as the amount of stuff doesn't go over a critical threshold, the universe will continue to expand forever, and eventually suffer heat death, freezing out. But if there's too much stuff, the expansion of the universe will slow down and stop. Then the universe will begin to contract.

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Answer:

The universe is expanding

Explanation:

Its expanding in many ways as in technology, mind, life it self,         its all part of a life form in the universe to create more life in earth and other places like the micro organism with the bacteria and the microscopic life form.

Answer:

Dalton expressed his assumption in A Modern Model of Chemical Theory that atoms of various elements should be uniformly differentiated, based on their differing atomic weights. In doing so, he became the first scientist to explain atom behavior as regards weight measurement.

Explanation:

Answer:

0.15M

Explanation:

NaOH + HCl -->NaCl + H2O

moles of NaOH reacted with HCl

(0.5 × 30)/1000 = 1.5 × 10^ -3

so the moles of HCl reacted with NaOH

1.5 × 10^ -3

concentration of HCl = ( 1.5 × 10^ -3)/10 ×1000