Which of the following equilibria could be used to support the claim that the addition of a small amount of NaOH to the buffer will result in only a very small change in pH? (see image)

Answer

Plants can respond to the change of season by losing their leaves, flowering, or breaking dormancy. Plants go through seasonal changes after detecting differences in day length.

Explanation:

Answer:

See explanation

Explanation:

Usually, when we write a chemical formula for any compound or other chemical specie, we use subscripts to;

Hence, the subscripts written after chemical formulas have more than one function as described above.

In H2SO4 for instance, there are two hydrogen atoms, one sulphur atom and four oxygen atoms as shown in the chemical formula.

Answer:

is this a poem or something?

Answer:

Burning of the candle is both physical and chemical change. Burning of the candle melts the wax and hence physical state of wax has changed from solid to liquid.  

Again the wax combines with the atmospheric oxygen and changes to carbon dioxide, heat and light.  

Thus both the changes are accompanied by the burning of the candle.

Explanation:

hope this helps!

~mina

Answer:

The answer should be 40.3044 g/mol

Answer:

vaporization.

Explanation:

Explanation:

extracting energy from nuclear fuels is more expensive than extracting energy from fossil fuels

Answer:

A is the symbol of mass number.

Explanation:

→ Mass number (A) = Protons + Neutrons

It is the required formula. The symbol of the mass number is A.

Answer:

The letter A

Explanation:

Answer:

The variable Q

Explanation:

i just took the test and got it right.... i hope this helps :)

The variable Q represents thermal energy in the equation Q = mcΔT. Hence, option B is correct.

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases by 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

Q =  mcΔT

Q = heat energy

m = mass

c = specific heat capacity

ΔT = change in temperature

Hence, option B is correct.

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Answer:

Homework hint: P1V1 = nRT1 and V1, n, and R are constant. Remember to use Kelvin.

Answer:

c increase the temperature  

Explanation:

Answer: The male reproductive system contains the TESTES; which PRODUCE SPERM. The correct option is D

Explanation:

There are different organ systems in the human body which functions together to bring about the normal healthy status of an individual. To list but a few, these systems include:

--> skeletal and muscular system

--> Endocrine System,

--> Nervous System, and

--> REPRODUCTIVE SYSTEM

The reproductive system is made up of the male and the female reproductive system which are very different as it's consists of different organs with different functions.

The male reproductive system consists of:

--> scrotum

--> Testes

--> prostate gland

--> seminal vesicles

--> penis.

The SPERM (spermatozoa) are produced in the seminiferous tubules of the TESTES and mature as they pass through the long and convoluted epididymis, where they are stored. Therefore option D is the correct answer.

Answer:

Dilution is the process of decreasing the concentration of a solute in a solution, usually simply by mixing with more solvent like adding more water to the solution

Answer:

terminal velcity

Explanation:

Answer:

Decomposition Reaction

Explanation:

Ba(NO₃)₂(s) ⇒ BaO(s) + N₂(g) + 3 O₂(g)

Barium nitrate decomposes into the chemical species that were used to create it.

Answer:

Potassium Permanganate

Explanation:

A solution is defined as the mixture of two or more substances. The substance that is in big proportion is called as Solvent, the substance that is in low amount is called as Solute.

In an aqueous solution, the solvent is the water. As the aqueous solution is 0.879M KMnO4, the solute is:

Answer: the essential parts of a flower

Explanation:

are engaged with seed creation. In the event that a blossom contains both useful stamens and pistils, it is known as an ideal bloom, regardless of whether it doesn't contain petals and sepals. On the off chance that either stamens or pistils are deficient with regards to, the blossom is called imperfect.

Mass is an intrinsic property of matter and is measured in kilograms. The mass of a bird is a constant. A 15-gram bird is 15 grams, whether measured on the Earth, the Moon, or Mars. Weight is a measure ofthe force of gravity on a physical object and is measured in newtons.

Answer:

V = 5000 mL

Explanation:

¡Hola!

En este caso, dado que la molaridad de una solution se calcula al dividir las moles por el volume de solución en litros, es posible calcular el volumen cuando se dividen las moles por la molaridad, tal y como se muestra a continuación:

[tex]M=\frac{n}{V}\\\\V=\frac{n}{M}[/tex]

Así, podemos reemplazar la molaridad y moles dadas para obtener:

[tex]V=\frac{1.5mol}{0.3mol/L}=5L[/tex]

Que en mililitros sería:

[tex]V=5L*\frac{1000mL}{1L}\\\\V=5000mL[/tex]

¡Saludos!

Answer:

50 kJ

Explanation:

Activation energy is between the energy of reactants and the peak of the curve.

200 kJ - 150 kJ = 50 kJ

The correct answer is 50kJ

Hence 50KJ is activation energy

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Answer:

Aluminium is ordinarily classified as a metal. It is lustrous, malleable and ductile, and has high electrical and thermal conductivity. Like most metals, it has a close-packed crystalline structure and forms a cation in an aqueous solution.

Answer:

[tex]2.18\%[/tex]

Explanation:

Volume of isopropyl alcohol = 24 mL

Volume of water = 1.1 L

Percentage of isopropyl alcohol is given by

[tex]\dfrac{\text{Volume of isopropyl alcohol}}{\text{Volume of isopropyl alcohol+Volume of water}}\times 100\\= \dfrac{24\times 10^{-3}}{1.1+2.4\times 10^{-3}}\times 100\\ =2.18\%[/tex]

The percent by volume of isopropyl alcohol in the given solution is [tex]2.18\%[/tex].

Answer:

See explanation

Explanation:

The postulates of the kinetic theory of matter are;

Answer:

-177.9 kJ.

Explanation:

Use Hess's law. Ca(s) + CO2(g) + 1/2O2(g) → CaCO3(s) ΔH = -812.8 kJ 2Ca(s) + O2(g) → 2CaO(s) ΔH = -1269.8 kJ We need to get rid of the Ca and O2 in the equations, so we need to change the equations so that they're on both sides so they "cancel" out, similar to a system of equations. I changed the second equation. Ca(s) + CO2(g) + 1/2O2(g) → CaCO3(s) ΔH = -812.8 kJ 2CaO(s) → 2Ca(s) + O2(g) ΔH = +1269.8 kJ The sign changes in the second equation above since the reaction changed direction. Next, we need to multiply the first equation by two in order to get the coefficients of the Ca and O2 to match those in the second equation. We also multiply the enthalpy of the first equation by 2. 2Ca(s) + 2CO2(g) + O2(g) → 2CaCO3(s) ΔH = -1625.6 kJ 2CaO(s) → 2Ca(s) + O2(g) ΔH = +1269.8 kJ Now we add the two equations. The O2 and 2Ca "cancel" since they're on opposite sides of the arrow. Think of it more mathematically. We add the two enthalpies and get 2CaO(s) + 2CO2(g) → 2CaCO3(s) and ΔH = -355.8 kJ. Finally divide by two to get the given equation: CaO(s) + CO2(g) → CaCO3(s) and ΔH = -177.9 kJ.

Answer:

C. one star

Explanation:

Of course our solar system has one unique star which is the sun while others have atleast two which are called binary solar