Which formula contains a metal and a nonmetal? SO2 MgO CO H2O

Answer:

balancing of charges of both sides

Answer:

A

Explanation:

A...............................

Answer:

441

Explanation:

In particle model A are the red and blue particles MOST LIKELY to bump into each other and the correct option is option A.

The particle model of matter is a theory that explains how the particles that make up a substance are arranged, and how they move and interact with each other.

The particle model explains the properties of solids, liquids and gases. The particle model can explain changes of state.

Particles of matter have spaces between them. Atoms and molecules have spaces between them. In a gas, there are large spaces between them. In a a liquid they are closer together. In a solid, the particles are packed close enough together they can hardly move.

Therefore, In particle model A are the red and blue particles MOST LIKELY to bump into each other and the correct option is option A.

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Answer:

TRUE

Explanation:

It is true because along with energy, nuclear fusion releases other particles as well. This can include neutrons or atomic nuclei. An example of this is when hydrogen isotopes (D + T) fuse together to create helium it also releases a neutron. Thus D+T --> He + n + energy.

Therefore the answer is TRUE.

Explanation:

1. Displacement of hydrogen from water by using metal

2. Electrolysis of water using the apparatus known as the HOFMAN VOLTAMETER

3. Cracking of petroleum

4. Action of steam on hot coke

Answer:

Explanation:

Burning  paper is a chemical change.

Burning (or combustion ) is a high temperature chemical reaction that takes place  between fuel and an oxidant(mostly  oxygen)

Research has proved has taught us that ;

When paper is burned , the  oxygen (from the air) combines with carbon and hydrogen in the paper turning some of it into carbon dioxide and water vapor, which waft away with carbon particulates in the smoke

I hope it helps :)

Answer:

The Kₐ of the weak acid is 1.033×10⁻⁴

Explanation:

The dissociation of a weak acid in aqueous solution is limited to about 5 to 10%

The acid dissociation reaction is given as follows;

HA (aq) + H₂O (l) → H₃O⁺(aq) + A⁻ (aq)

Given that the pH = 2.5, we have

pH = -log₁₀[H₃O⁺] = 2.5

∴ [H₃O⁺] = 10^(-2.5) = 0.0031623

[tex]K_a = \dfrac{[H_3O^+][A^-]}{[HA]}[/tex]

Kₐ = [H₃O⁺][A⁻]/[HA] = (0.0031623^2)/(0.1 - 0.0031623) = 1.033×10⁻⁴

The acid dissociation constant, Kₐ for weak acid is very low as obtained

The single mark placed on the sidewalk by Julie has been acting as the reference point for detecting the motion of the snail. Thus, option D is correct.

The snail has been the shelled animal that has been mostly residing in the resting condition with limited movement. To evaluate the movement of the snail, there has been the consideration of a point that was the starting point from the movement.

The line that has been set across the sidewalk has been acting as the reference, and the distance traveled has been calculated from that point. Thus, option D is correct.

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Answer:

The thermal decomposition of ammonium nitrate to produce dinitrogen monoxide and water. This reaction takes place at a temperature of 200-260°C.

Answer:

O c. One that is answered through observation

I used process of elminations so

Explanation:

One that everyone agrees one doesnt mean it's accurate.

Only the one that scientists ask doesnt make sense

One that never changes and One that is answered through observation.... So C

Answer:

A.

Explanation:

Higher temperature - more kinetic energy - more space between particles - higher volume.

Answer:

Here's what I get  

Explanation:

You haven't shown your drawing, so I will assume that Metal A is the anode and Metal B is the cathode.

I will make a galvanic cell using Mg and Zn as the metals.

I selected Zn because it is common and readily available in the lab.

Zn is lower than Mg in the activity series, so Mg should be able to displace Zn from its salts

The standard reduction potentials are:

                                         E°/V

Zn²⁺ (aq) + 2e⁻ ⇌ Zn(s);  -0.76

Mg²⁺(aq) + 2e⁻ ⇌ Mg(s); -2.38

The Mg half-reaction has the more negative potential, so it will be the oxidation half-reaction.

8 and 9. Oxidation and reduction half-reactions and cell potential

                                                                                   E°/V

Oxidation:  Mg(s) ⇌ Mg²⁺(aq) + 2e⁻ ;                      +2.38

Reduction: Zn²⁺ (aq) + 2e⁻ ⇌ Zn(s);                         -0.76

                   Mg(s) + Zn²⁺ (aq)  ⇌ Mg²⁺(aq) + Zn(s);  +1.62

The cell potential is positive, so the reaction will be spontaneous.

Mg is the anode, so it is Metal A.

Zn is the cathode, so it is Metal B.

1. The Mg|Mg²⁺ half-cell is the oxidation compartment.

2. The Zn²⁺|Zn half-cell is the reduction compartment.

3. The electrons flow from anode to cathode in the external circuit.

4. The Mg²⁺ ions flow from the Mg through the solution to the salt bridge.

5. The Zn²⁺ ions flow from the solution to the Zn.

6. NO₃⁻ ions flow from the salt bridge into the anode compartment to balance the charge of the developing Zn²⁺ ions.

7. Na⁺ ions flow from the salt bridge into the cathode compartment to replace the charge of the depleted Zn²⁺ ions.

Answer:

tempature of the person, check carbon levels in the house or place where the person is.

Explanation:

Answer:

[tex]\boxed{C}[/tex]

Explanation:

The electrons farthest away from the nucleus are the valence electrons of an atom.

The valence electrons are the electrons orbiting in the last shell around the nucleus.

Answer:

Option C

Explanation:

The electrons that are the farthest away from the nucleus are valence electrons. These are electrons are present in the outermost shell which is also called valence shell.

At 17 celsius ❤️

it will start to boil ❤️

#indian❤️

Answer: 7 milimoles of [tex]N_2[/tex] dissolve in 1 litre water.

Explanation:

Given:  [tex]N_2[/tex] gas is passed through water at 293K.

Assumption :[tex]N_2[/tex] exerts a partial pressure of 0.987 bar.

Take : Henry's constant [tex]p_N_2[/tex] = 76.8 Kbar

[tex]K_H=76800[/tex]

To find : Number of moles of  [tex]N_2[/tex] gas dissolve in 1 litre water.

According to Henry's law,

[tex]p_N_2=K_HX_{N_2}[/tex]

[tex]\Rightarrow\ 0.987=76800X_{N_2}[/tex]

[tex]\Rightarrow\ X_{N_2}=\dfrac{0.987}{76800}=0.0000128515625\approx1.29\times10^{-5}[/tex]

moles in 1 liter  of water = [tex]\dfrac{1000}{18}=55.56\ [\text{Molar mass of }H_2O=18\ g][/tex]

Let n= moles of nitrogen

Total moles = 55.56+n

So,

[tex]X_{N_2}=\dfrac{n}{55.56+n}=1.29\times10^{-5}\\\\\Rightarrow\ 55.56\times1.29\times10^{-5}+1.29\times10^5n=n\\\\\Rightarrow\ n- 1.29\times10^5n=0.000714033\\\\\Rightarrow\ 0.999987n=0.000714033\\\\\Rightarrow\ n\approx7\text{ milimoles}[/tex]

Hence, 7 milimoles of [tex]N_2[/tex] dissolve in 1 litre water.

Answer:

d

Explanation:

i got it right

Gas A is likely to have the lowest temperature.  Hence, option A is correct.

The smallest particle of a substance has all of the physical and chemical properties of that substance. Molecules are made up of one or more atoms.

In a gas, the kinetic energy is directly proportional to the temperature under constant pressure and volume.

As you can see in the problem, the average of A has low kinetic energy. But the average is increasing between B, C and D.

As gas A has the lowest average kinetic energy:

Gas A is likely to have the lowest temperature

Hence, option A is correct.

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Answer: c

Explanation: effusion because there is a movement of a gas through a small opening into a larger volume

Answer:

As it is an aqueous solution the sodium is dissolved in the water, if you want to extract it use evaporation

Explanation:

Answer:

B. reflection

Explanation:

Rigid transformations are methods involved in changing the dimensions or orientation of a given figure. The methods are; dilation, rotation, translation and reflection.

Reflection is the process in which a given figure is turned or flipped with respect to a point or line of reference.

In the given question,

ΔDEF ≅ ΔD'EF' (Side-Side-Side congruence property)

This implies that ΔDEF was reflected about point E to produce ΔD'EF'. Thus the required rigid transformation is reflection.

Answer:

Is C - Rotation

Explanation:

I have right on my test

Answer:

Explanation:

Molecule of aluminium fluoride is more polar than molecule of aluminium chloride . It is so because fluorine is more electronegative than chlorine . On Pauling scale , the electronegativity of fluorine is 3.98 whereas that of chlorine is 3.16 . Hence in aluminium fluoride , there is stronger inter molecular bonding because of  more polar nature of molecules .  In aluminium chloride  , there is weaker  inter molecular bonding because of  comparatively  polar nature of molecules . Hence melting point of anhydrous aluminium fluoride is higher than that of anhydrous aluminium chloride .

Answer:

Weight = mass × earth's gravitational acceleration

Explanation:

Follow the following steps to measure the mass and weight of an object:

It has a double C=C bond so that means it's unsaturated, but it can also be a cyclic compound with only simple C-C bonds

Alkene

I did the test

Answer:

These are Kepler's Laws of Planetary Motion

Explanation:

Answer:

its Keplers third law,

then first law,

then second law

Explanation:

Answer:

hydro

Explanation: hydrogen

Answer:

C. Atmosphere

Explanation:

First, let’s define each answer choice.

Hydrosphere: all of the water on Earth

Biosphere: the global ecosystem where organisms live

Atmosphere: the envelope of gases around the planet

Lithosphere: the outermost part of the Earth( the crust and upper mantle)

The question asks us to find the scientific name for the layer of gas that surrounds the Earth. The best choice is C. Atmosphere.

Answer:

D) two unhybridized p orbitals

Explanation:

In covalent bond, to form a bond, each of the two participating atoms would put down an  unpaired electron to be used in forming a shared pair of electrons between them.

There are two types of covalent bonds:

A sigma bond [tex]\sigma[/tex]

A pi bond [tex]\pi[/tex]

A sigma bond is formed when a hybrid orbital (sp,sp² and sp³) overlaps with another hybrid orbital or with s- or p- orbital.

A pi bond is formed when a p-orbital overlaps with another parallel p-orbital laterally. This implies that ,a  π bond could be formed from the overlap of two unhybridized p orbitals.

Answer:

Final temperature (T) = 44.22°C (Approx)

Explanation:

Given:

Mass of Y (m) = 16.2 gram

Energy required (q) = 2722 J

Specific heat of the substance(c) = 9.22 J/g·°C

Change in temperature ΔT = T - 26°C

Find:

Final temperature (T)

Computation:

q = mcΔT

2722 = (16.2)(9.22)(T - 26°C)

18.224 = T - 26°C

T = 26 + 18.224

T = 44.224°C

Final temperature (T) = 44.22°C (Approx)

Answer:

Explanation:

Ohm's Law. The relationship between voltage, current, and resistance is described by Ohm's law. This equation, i = v/r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r.