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Reaction b,c and d could be written as net ionic equations.

The electrolyte in the solution produces ions.  

The equation of a chemical reaction can be expressed in the equation of the ions  

For strong electrolytes (the ionization rate = 1) is written in the form of separate ions, while the weak electrolyte (degree of ionization <1) is still written as an un-ionized molecule  

In the ion equation, there is a spectator ions that is the ion which does not react because it is present before and after the reaction  

When these ions are removed, the ionic equation is called the net ionic equation  

For gases and solids including water (H₂O(l)) can be written as an ionized molecule  

So only the dissolved compound is ionized ((expressed in symbol aq)  

To see the reaction can be expressed in terms of the net ionic equation, we must see that there are two or more ions that are the same from both sides of the reactant and the product in the form of aquoeus (because the form of compounds in the form of gases, solids and liquids will remain molecular and non-ionized)

CH4 (g) + 2 O2 (g) = CO2 (g) + 2 H2 O(g)

No⇒no compounds in the aqueous form

Cu(s) + 2 AgNO3 (aq) = 2 Ag(s) + Cu(NO3 )2 (aq)

Cu(s) + 2 Ag⁺+ 2NO3⁻ (aq) = 2 Ag(s) + Cu²⁺ +2NO3⁻ (aq)

Cu(s) + 2 Ag⁺(aq) = 2 Ag(s) + Cu²⁺(aq)

yes, because there are NO3 (spectators ion) on both sides

MgCl2 (aq) + 2 KOH(aq) = Mg(OH)2 (s) + 2 KCl(aq)

Mg²⁺(aq)+2Cl⁻ (aq) + 2K⁺(aq)+2OH⁻(aq) =  Mg(OH)2 (s)+ 2K⁺(aq)+2Cl⁻(aq)

Mg²⁺(aq)+2OH⁻(aq) =  Mg(OH)2 (s)

yes, because there are 2Cl⁻ (aq) and 2K⁺(aq (spectators ion) on both sides

CaCO3 (s) + 2 HCl(aq) = CaCl2 (aq) + CO2 (g) + H2 O(l)

CaCO3 (s) + 2 H⁺(aq)+2Cl⁻(aq) = Ca²⁺(aq)+2Cl⁻ (aq) + CO2 (g) + H2 O(l)

CaCO3 (s) + 2 H⁺(aq) = Ca²⁺(aq) + CO2 (g) + H2 O(l)

yes, because there are Cl⁻ (spectators ion) on both sides

Answer:

d = 1.53 g/mL

Object will sink into water

Explanation:

Given data:

Mass of object = 14.8 g

Initial volume of water = 25.0 mL

Final volume after adding object = 34.7 mL

Density of object = ?

Density of water = 1.00 g/mL

Solution:

Volume of object = Total volume - volume of water

Volume of object = 34.7 mL - 25.0 mL

Volume of object = 9.7 mL

Density of object;

d = mass/volume

d = 14.8 g /  9.7 mL

d = 1.53 g/mL

The density of water is 1.00 g/mL which means object is heavier than water thus object will sink into the water. The object with density less than water are float in it.

Answer:

amplitude= distance between midpoint of a wave and crest

crest= highest point of transverse wave

wavelength= distance traveled in one wave cycle

medium= matter distributed by energy

trough=lowest point of transverse wave

frequency=number of waves that pass per second

Explanation:

A wave is a dynamic perturbation of one or even more quantities that propagates in a specific medium.

A wave is a dynamic perturbation of one or even more quantities that propagates in physics, mathematics, or related sciences. When waves oscillate frequently around an equilibrium position at a certain frequency, they are said to be periodic. A traveling wave is one in which the whole waveform moves inside one direction; in contrast, a standing wave is one in which two periodic waves are overlaid and move in the opposing directions.

In a wave form, there are some points in which the wave amplitude seems reduced or even zero, and these positions have null vibration amplitudes. A wave equation or perhaps a one-way wave equation describing single wave propagation inside a specific direction is frequently used to describe waves.

amplitude= distance between midpoint of a wave and crest

crest= highest point of transverse wave

wavelength= distance traveled in one wave cycle

medium= matter distributed by energy

trough=lowest point of transverse wave

frequency=number of waves that pass per second

Therefore, a wave is a dynamic perturbation of one or even more quantities that propagates

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Answer:

compounds

Explanation:

It is a substance formed when two or more. When the elements are joined, the atoms lose their individual properties and have different properties from the elements they are composed of.

Answer:

Brain big big brain

Explanation:

Biggest brain small brain Big brain big stonks

Answer:

Glaciers moving rocks and soil through a valley

Explanation:

The definition of Erosion is "the process of eroding or being eroded by wind, water, or other natural agents". Which in turn means the movement of glaciers is causing erosion on the local valley.

the last one

Explanation:

Answer:

During a phase change no chemical bonds are broken. Atoms are not rearranged because a phase change is a physical change rather then a chemical change. However, intermolecular forces are almost entirely removed from the liquid since the intermolecular forces are what cause the liquid to be a liquid.

Explanation:the nature of the intermolecular forces (IMF) will not change when the state changes from solid to liquid, however, the number of IMF changes.

Answer:

the volume increases

Explanation:

Answer:

C & E

Explanation:

Answer:

COLD AND FLU!!!!

Explanation:

Answer:

CORONAVIRUS UGH

Explanation:

Explanation:

The angle strain arises from the compression of the ideal tetrahedral bond angle of 109.5° to 60°. The large torsional strain occurs since all CH bonds on adjacent carbons are eclipsed.

The lateral angle that decrease in the lateral angle from 109.5 to 60 degree so, these is the main source of angle strain and torsional strain present in cyclopropane.

Angle strain is the term for strain that results from departure from one or more ideal bond angles. Torsional strain is a chemical compound's resistance to bond twisting. Torsional strain between the bonds occurs when atoms separated by three bonds are arranged in an unstable staggered conformation rather than an eclipsed shape.

It exists in cyclopropane because its C-C-C bond angles must not exceed 60 degrees, which is less than the optimum bond angle of 109.5 degrees for tetrahedral carbon. It is the cause of these.

We are aware that three carbon atoms in a triangle plane break the cycle and cause each carbon to be sp3 hybridized. All carbon endeavors are sp3 hybridized, and we are aware that the sp3 hybrid angle is 109 degrees, 28 minutes at 109.5 degrees. But the single angle in cyclo-propane is only 60 degrees.

Personal strain results from the bending of bonds necessary to form a new molecule. The primary source of the angle strain and torsional strain found in cyclopropane is the decrease in lateral angle from 109.5 to 60 degrees.

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Explanation:

The specific heat capacity is the amount of heat required to raise the temperature of 1mole or 1kg or 1g of substance by 1k or 1°C

This property is an intensive property of matter and does not depend on the quantity of matter present.

 Some of the unit of specific heat are;

J/g°C, J/kg°C, J/mol°C, J/molK , Cal/g°C

Answer:

Well, I have pet squirrels, and I know they get acorns and other food, and dig up certain spots on the ground, then put their food in there. And they have food for the winter.

Answer:

Contour plowing

Explanation:

Contour plowing is one of the activity that can help control the rate of erosion in a given place.

Sodium-25 after 3 minutes : 1.0625 mg

General formulas used in decay:  

[tex]\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}[/tex]

T = duration of decay  

t 1/2 = half-life  

N₀ = the number of initial radioactive atoms  

Nt = the number of radioactive atoms left after decaying during T time  

No=8 mg

t1/2=60 s

T=3 min=180 s

[tex]\tt Nt=No\dfrac{1}{2}^{T/t1/2}\\\\Nt=8.5\dfrac{1}{2}^{180/60}\\\\Nt=8.5(\dfrac{1}{2})^3\\\\Nt=1.0625~mg[/tex]

Answer:

Explanation:

Hydrogen has 1 proton and one nuetron

Oxygen has 8 protons nad 8 neutrons

Answer:

sodium

Explanation:

Answer:

by statistical analyses, especially by determining the p-value

Explanation:

In general, observations and results obtained from experimental procedures are subjected to a statistical test to check the robustness of the working hypothesis. The p-value is the most widely used statistical index in order to test such observations and results. The p-value is the statistical probability of obtaining extreme observed results when the null hypothesis is considered correct. A p-value lesser than 0.05 generally is considered statistically significant and then the null hypothesis can be rejected. In consequence, a very low p-value (which is obtained by statistical analysis of the observations and results), indicates that there is strong evidence in support of the alternative hypothesis.

Answer:

Potassium, sulfur, fluorine, barium

The elements that will lose one electron are:

a. sodium

d. Potassium

An element in its natural state has an equal number of protons and electrons, giving it a net charge of zero; however, when an element loses an electron as part of a chemical reaction it becomes positively charged, or oxidized.

Out of the given options, sodium and potassium looses one electron and attains a positive charge leading to the formation of cation. While Fluorine and chlorine gains one electron and attains a negative charge leading to the formation of anion.

Thus, correct options are a and d.

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Explanation:

Physical properties of matte tells us everything about a substance when no change is occurring to its constituents.

Such properties are best observed with our senses. Also, physical properties can be observed using equipment in the laboratory or some apparatus.

Answer:

Half life = 10.765 year

Explanation:

Given data:

Mass of sample = 500 Kg

Mass left after 21.53 years = 125 kg

Half life of substance = ?

Solution:

At tome zero = 500 kg

At 1st half life = 500 kg/2 = 250 kg

At 2nd half life = 250 kg/2 = 125 g

Half life:

Half life = time elapsed / number of half life

Half life = 21.53 year/2

Half life = 10.765 year

Answer:

C

Explanation:

I did it on usatestprep

Answer:

ill help but i cant see the problem

Explanation:

Answer:

vxxbvfdb

Explanation:

Answer:

sorry dude

Explanation:

i got no clue

Answer:

FALSE

Explanation:

right answer on plato:)

Answer:

Explanation:

i hope it helps ;)

Answer:

0.33 mol

Explanation:

Given data:

Volume of balloon = 8.3 L

Temperature = 36°C

Pressure = 751 torr

Number of moles of hydrogen = ?

Solution:

Temperature = 36°C (27 +273 = 300 K)

Pressure = 751 torr (751/760= 0.988 atm)

Formula:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

PV  = nRT

0.988 atm × 8.3 L  = n × 0.0821 atm.L/ mol.K  × 300 K

8.2 atm.L = n × 24.63 atm.L/ mol

n = 8.2 atm.L / 24.63 atm.L/ mol

n = 0.33 mol

The answer is D

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