Ammonium chloride + Potassium hydroxide - Potassium
chloride + Ammonia gas + Water
Which of the following chemical reactions correctly interprets
the chemical word equation above?
а) KCl (aq) + NH3(g) + H20 (1) ► NH4Cl (aq) + KOH (aq)
b) NH4Cl (aq) → KCl (aq) + NH3(g) + H2O (1)
c) NH3 (g) + KOH (aq) → NH3(g) + H20 (1)
d) NH4Cl (aq) + KOH (aq) → KCl (aq) + NH3(g) + H20 (1)

Answer:

The temperature of a substance in chemistry, is taken as a measure or estimate of the average kinetic energy ([tex]K_{avg}[/tex]) of the atoms or molecules contained in the substance. The 6.02 × 10²³ particles (atoms or molecules) within 1.0 mole of each substance can each posses different amount of kinetic energy at any given time. Some particles move very fast while others move very slow such that the kinetic energy of all the particles are only representable by a distribution and a conclusion regarding the  different aspects of the kinetic energy distribution of the particles of the substances is not easily possible

Explanation:

For a gas, we have;

[tex]KE_{avg} = \dfrac{3}{2} \cdot k \cdot T[/tex]

Where;

[tex]KE_{avg}[/tex] = The average kinetic energy

k = 1.38 × 10⁻²³ J/K

T = The gas temperature in Kelvin

Answer:

It is equal to Avogadro's number (NA), namely 6.022 x1023.

Answer:

It is equal to Avogadro's

number (NA), namely 6.022×1023

Answer:

27.65×10²³ atoms of H

10.37×10²³ atoms of C

Explanation:

Given data:

Mass of C₃H₈ = 25.3 g

Number of hydrogen atom = ?

Number of carbon atom = ?

Solution:

Number of moles of propane:

Number of moles = mass/molar mass

Number of moles = 25.3 g/ 44.1 g/mol

Number of moles = 0.574 mol

1 mole of propane contain 3 mole of carbon atoms.

0.574 moles of propane contain 0.574  × 3 mol = 1.722 moles of C.

1 mole =  6.022 ×10²³ atoms of C

1.722 mole × 6.022 ×10²³ atoms of C / 1 mol

10.37×10²³ atoms of C

Number of atoms of H:

1 mole of propane contain 8 mole of hydrogen.

0.574 moles of propane contain 0.574  × 8 mol = 4.592 moles of H.

1 mole =  6.022 ×10²³ atoms of H

4.592 mole × 6.022 ×10²³ atoms of H / 1 mol

27.65×10²³ atoms of H

Answer: Fungi

Explanation:

Some organisms are able to reproduce their offspring asexually. Bacteria is an example for asexually reproducing organism which is different from the other organisms given.

Asexual reproduction is type of  reproduction which does not involve fusion of of male and female reproductive systems. Asexual reproduction does not involve a change in the number of chromosomes also.

Prokaryotes are organisms with undeveloped nucleus and cells. Prokaryotes such as bacterias reproduce asexually. The method or reproduction in bacteria is called binary fission.

In binary fission a single cell divides into two  identical daughter cells and thus multiplies its population. Thus each daughter cell is clone of the parent cell.

All mammals and invertebrates and fungi are reproducing sexually and their metabolic activities are entirely different from prokaryotes such as bacteria. Thus option A is correct.

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Answer:

A. Molarity will increase .

Explanation:

Molarity = moles of solute per litre of solution

= moles of solute / volume of solution

If evaporation occurs , volume of solution decreases and moles of solute remains constant . Hence denominator decreases and numerator remains constant .

Hence the molarity increases .

Answer:

7255455.5%

Explanation:

Giveb that

population in 1630 = 4500

Population in 2017 = 326,500,000

Percentage increase :

((Change in population) / initial population) * 100%

((326,500,000 - 4500) / 4500) * 100%

(326495500 / 4500) * 100%

72554.555 * 100%

= 7255455.5%

Answer:

An example could be using a car, bicycle, bus, etc.

Explanation:

From there you would identify the energy source as it says and describe them in a pargaraph.

For instance to describe a solar panels' energy. You would say the energy source is heated from the sun.

Answer:

Hi... If your distance is 1 meters your answer is 95

But if your distance is 12 that you typed wrong, your answer is 12*95=1140

Answer:

CO(g) + H2O(g) ⇌ CO2(g) + H2(g)

Answer:

22g of  2

C

O

2

have  3.011×1023

3.011

×

10

23

  2

C

O

2

molecules.

Explanation:

Hope this helps! ^^

Both the pure hydrogen and hydrogen bromide is held by weak intermolecular forces of attaction between molecules. Bromide has larger size of electron cloud than Hydrogen, leading to a greater extent of polarisation of the electron cloud. This results in stronger van der Waals' forces of attraction in hydrogen bromide compared to the pure hydrogen. More energy is required to break the stronger bonds in hydrogen bromide than pure hydrogen, leading to a higher boiling point in hydrogen bromide. Thus, pure hydrogen has a lower boiling point.

Explanation:

the strength of intermolecular forces of attraction rely on the size of the electron cloud. the greater the atomic number, the greater the size of the electron cloud and thus, the stronger the forces of attraction.

When asnwering a qn, you want to first state the structure and bonding of the compound, then compare the size of their electron clouds.

Answer structure:

greater size of electron clouds -> greater extent of polarisation of electron cloud -> stronger van der Waals' forces of attraction -> more energy required to overcome the bonds -> higher boiling point

Pure hydrogen has a lower boiling point than hydrogen bromide due to weak intermolecular forces.

Intermolecular forces are those forces which binds different molecules all together.

Bromide's electron cloud is larger than Hydrogen's, resulting in more polarisation of the electron cloud. In comparison to pure hydrogen, hydrogen bromide has greater van der Waals forces of attraction. Because the stronger bonds in hydrogen bromide need more energy to break than pure hydrogen, it has a higher boiling point. Pure hydrogen has a lower boiling point as a result.

Hence due to less intermolecular forces hydrogen bromide has a lower boiling point.

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Answer:

30 I guess

Explanation:

Answer:

12, 28, 16

Explanation:

If we are trying to find mass, neutrons are our guy. 28 "mass points" means 28 neutrons. Each neutron is one point

We know there are 12 protons and electrons if we look at a table of elements, the number in the top-left is always the number of protons and we can subtract mass from the protons to get our electrons

Answer:

A

Explanation:

The study of a chemical is called chemistry.

The correct answer is A

Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive.

The radioactive of the Ra is option A that is:-

[tex]RA^{226}_{88}----->Rn^{222}_{86} +He^4_2[/tex].

During the decomposition, the element is breakdown into the neutron, proton, and electron.

Hence, the correct answer is A.

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Answer:

The Earth absorbs most of the energy reaching its surface

Explanation:

a small fraction is reflected. In total approximately 70% of incoming radiation is absorbed by the atmosphere and the Earth's surface while around 30% is reflected back to space and does not heat the surface.

Answer:

D. Existing skin cells near the injury reproduced to make new cells.

Samuel tripped while playing basketball and skinned his knee on the concrete. Many of the skin cells on that knee were killed or removed entirely, leaving his knee open and unprotected. Eventually, his knee scabbed over, and when the scabs fell off, there was new skin underneath. The new skin come from Existing skin cells near the injury reproduced to make new cells.

Cells are the smallest unit in living organisms which lives on it's own and makes up tissues in living organisms. The Four Main Types of Cells are-

Epithelial Cells.

Nerve Cells.

Muscle Cells.

Connective Tissue Cells.

The body of an average man contains around 30 to 40 trillion cells.

Cells provide structure and function for all living things, from microorganisms to humans. Scientists consider them the smallest form of life. Cells house the biological machinery that makes the proteins, chemicals, and signals responsible for everything that happens inside our bodies.

Cells can vary between 1 micrometer (μm) and hundreds of micrometers in diameter. Within a cell, a DNA double helix is approximately 10 nanometers (nm) wide, whereas the cellular organelle called a nucleus that encloses this DNA can be approximately 1000 times bigger (about 10 μm).

Therefore, The new skin come from Existing skin cells near the injury reproduced to make new cells.

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Answer:

b. Conceptual models help us see how things are related and how they connect or work together. This helps us develop a hypothesis based on changes in a variable and the corresponding response of another variable.

Explanation:

A conceptual model refers to a vivid representation or conceptualization of the working of a system. Hence conceptual models offer explanations to ideas about systems.

They help to fit all the facts together so that one can make sense of a system. Also, it helps us to understand how changes in one variable affects the other in a system, thereby helping us to formulate a testable hypothesis.

Answer:

Al2(SO4)3

Explanation:

3Na2SO4 + 2AlCl3 →+ Al2(SO4)3 + 6NaCl

Answer:

Synthesis

Explanation:

That's the answer to that question

Answer:

The answer is p⁴.

Explanation:

You have to apply Indices Law :

[tex] {a}^{m} \times {a}^{n} ⇒ {a}^{m + n} [/tex]

For this question :

[tex] {p}^{3} \times {p}^{1} [/tex]

[tex] = {p}^{(3 + 1)} [/tex]

[tex] = {p}^{4} [/tex]

Answer:

8

Explanation:

From the question given above, the following data were obtained:

t–butyl ion = (CH₃)₃C⁺

Number of valence electron =?

The valence electron(s) talks about the combining power of an element or compound as the case may be.

Considering the t–butyl ion, (CH₃)₃C⁺ we can see that it has a charge of +1 indicating that it has given out 1 electron to attain the stable octet configuration which has a valence electrons of 8. Thus, the valence electron of t–butyl ion, (CH₃)₃C⁺ is 8

Answer:

1.VOLUME– The amount of space an object takes up. Basic Unit (SI Unit) for Solids – Cubic Meter, m3. LENGTH/DISTANCE – The measurement between two points.

2.one particle per cubic meter.

3.it means it is heavier

4.In a liquid the particles are still close together but a little further apart than in a solid.

5.In gases the particles are much further apart than in solids or liquids.

Explanation:

thats all i can type lol

The correct number of significant figures : 17

Given

mass = 8.64 g

volume = 2 ml

Required

The density of liquid

Solution

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]

The density :

ρ = 8.64 : 2

ρ = 4.32 g/ml

If we want to find density, then the steps should be as above

But if we ignore the density and just want to find the multiplication value to clarify the significant figure, then we must pay attention to the rule of multiplication, that is, the end result of the multiplication has the least significant number of the numbers involved in multiplying.

8.64 = 3 sig fig

2.0 = 2 sig fig

then the product contains 2 sig fig

8.64 x 2.0 = 17.28 rounded to 2 sig fig ⇒ 17

The [OH⁻] of the solution : 1 x 10⁻¹¹ M

Given

[H30) : 1 x 10-3 M.

Required

the [OH]

Solution

The water equilibrium constant is a product of the concentrations of [H3O +] and [OH-]

Kw = [H₃O⁺] [OH⁻]

Input the value of  [H₃O⁺]

1 x 10⁻¹⁴ = 1 x 10⁻³ x  [OH⁻]

[OH⁻] = 1 x 10⁻¹⁴ :  1 x 10⁻³

[OH⁻] = 1 x 10⁻¹¹ M

Answer:

Dactyl orbits Ida due to;

A. The mutual gravitational attraction between the two objects

Explanation:

An orbit is the curved repeating and regular gravitational path of an object that moves round another planet. An object in an orbit moves with the orbital velocity required to bring about an equilibrium between the the mutual gravitational pull (attraction) from the body around which the object cycles and the object and the object's inertia to move in a straight line

Therefore, the moon Dactyl is able to orbit the asteroid Ida due to the force of gravitation between the Dactyl and Ida.

Answer:

A. The mutual gravitational attraction between the two objects

Explanation: