Which of the following is true for a chemical reaction at equilibrium?

Answer:

that the oxygen atom is not equal on both sides

Explanation:

Thus the reaction is not balanced.

Answer:

D all

Explanation:

because law of conservation of mass describes A, B and C statement

Answer:

(when you get a girl)

Pain is a sensory trigger from your brain to represent the fact that something —or someone— could be hurting you. The pain will end once the thing causing it stops, as in a cause-effect scenario.

Mental health though, can be helped by finding happiness in life, like getting off of clash of clans and touching grass.

Answer:

Rutherford's model shows that an atom is mostly empty space, with electrons orbiting a fixed, positively charged nucleus in set, predictable paths. This model of an atom was developed by Ernest Rutherford, a New Zealand native working at the University of Manchester in England in the early 1900s

Explanation:

yan na ang exact

Rutherford's atomic model is the model which described the atom as a tiny, dense, positively charged core called a nucleus, in which nearly all the mass is concentrated, around which the light, negative constituents, called electrons, circulate at some distance, much like planets revolving around the Sun.

A. The mass of NaCl needed to react with F₂ at 280 K and 1.50 atm is 115.83 g

B. The mass of NaCl needed to react with F₂ at STP is 78.39 g

We'll begin by calculating the number of mole of F₂ by using the ideal gas equation as follow:

n = PV / RT

n = (1.5 × 15) / (0.082 × 280)

n = 0.98 mole

Next, we shall determine the number of mole NaCl that reacts. This is given below

F₂ + 2NaCl → Cl₂ + 2NaF

From the balanced equation above,

1 mole of F₂ reacted with 2 moles of NaCl.

Therefore,

0.98 mole of F₂ will react with = 0.98 × 2 = 1.96 moles of NaCl

Finally, we shall determine mass of NaCl as follow

Mass = mole × molar mass

Mass of NaCl = 1.98 × 58.5

Mass of NaCl = 115.83 g

At standard temperature and pressure (STP),

22.4 L = 1 mole of F₂

Therefore,

15 L = 15 / 22.4

15 L = 0.67 mole of F₂

Next, we shall determine the number of mole NaCl that reacts. This is given below

F₂ + 2NaCl → Cl₂ + 2NaF

From the balanced equation above,

1 mole of F₂ reacted with 2 moles of NaCl.

Therefore,

0.67 mole of F₂ will react with = 0.67 × 2 = 1.34 moles of NaCl

Finally, we shall determine mass of NaCl as follow

Mass = mole × molar mass

Mass of NaCl = 1.34 × 58.5

Mass of NaCl = 78.39 g

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Answer:

Weather maps im sorry im not sure but i think its the answer

[tex]thanks \: for \: points[/tex]

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The required temperature of the sample of gas is 823K.

Ideal gas equation gives idea about the behavior of gas at different condition & represented as:

PV = nRT, where

Moles will be calculated as:
n = W/M, where

Moles of Neon gas = 1g / 20.1g/mol = 0.049 mole

On putting all these values in the above equation, we get

T = (0.657)(5.01) / (0.049)(0.082) = 822.8 = 823 K

Hence required temperature of the sample is 823 K.

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Answer:

the most useful hydrocarbon is fuel.

Explanation:

some examples like: natural gases,coal,diesel fuel, kerosene etc.

The most useful hydrocarbon is fuel like gasoline, natural gas, fuel oil, diesel, jet fuel, coal, kerosene, and propane.

The term hydrocarbon is defined as the compound which is made up of hydrogen and carbon. They are useful as energy sources. Hydrocarbons are examples of group 14 hydrides.

There are four types of hydrocarbon that are alkanes, alkenes, alkynes and aromatic hydrocarbons.

Among the most widely used hydrocarbon fuels include gasoline, natural gas, fuel oil, diesel, jet fuel, coal, kerosene, and propane. Plastics and synthetic fabrics like polyester are made using hydrocarbons as well.

Thus, The most useful hydrocarbon is fuel like gasoline, natural gas, fuel oil, diesel, jet fuel, coal, kerosene, and propane.

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Answer:

sour ??

Explanation:

Answer:

C

Explanation:

Because D ask "They have a negative charge" yes and no, but neutrons do, Why? Well because  the neutron has a negative charge both in its inner core and its outer edge, with a positive charge sandwiched in between to make the particle electrically neutral. Whilst B is wrong because like protons and electrons they were both measured and observed differently, just as the neutron. So that makes C the only correct answer.

Answer:

The sun is lighting up different amounts of the moon.

Explanation:

Answer:

try youre best to succsess

Answer:

Snake

Frog

Grasshopper

Monkey

Mushroom

Answer:

the answer is H3O+.......

Answer:

H₂O

Explanation:

A Brønsted-Lowry base accepts protons. As seen in the equation, H₂O gains a proton to become H₃O⁺. It has gained one proton- a hydrogen atom.

C₂H₃O₂⁻ is a conjugate base.

H₃O⁺ is a conjugate acid.

HC₂H₃O₂ is an acid [or a Brønsted-Lowry acid].

Answer:

Abiotic

Explanation:

Its because it includes water, sunlight, tempature and soil

Answer:

2.21 grams

Explanation:

The first thing you need to do is find the chemical formula for sodium chloride which is NaCl (Molar mass: 58.44 g/mol).

The next the thing to do is to convert the mL to L by dividing by 1000 which will give us 0.158 L.

Now we look at the molarity formula M = n/L, plug in the molarity for M and the liters for L. 0.239 M (mol/L) = n/0.158 L.

Solve for n to get the number of moles of NaCl in the solution. You should get 0.037762 moles.

Then we have to multiply this by the molar mass of NaCl, (0.037762 mol)*(58.44 g/mol).

Moles cancel and when we round to sig figs we are left with 2.21 grams.

Hope this helps.

Answer:

yes

Explanation:

sedimentary rocks are mad from erosion and weathering!

weathering erosion and deposition occur to form every sedimentary rock that exist on Earth weathering is the creation of sediment through its supposed to wind or water tearing off pieces or do I survive a logical activity such as tree roots and animal hooves breaking at rock erosion is the transportation of the sediments from origin to deposition through wind water or glacial ice deposition is the process of the sediments being dropped off by their mode of movement or erosion method by glacial ice when are water.

Plastic wrap is transparent and so nearly all light passes through easily ,

Wax Paper is translucent and so light is blurred or scattered .

Reflection of light occurs when light hits a smooth surface that does not absorb any of the light but instead bounces it back off the surface.

A mirror is flat, smooth, and polished. When light hits a mirror it is not absorbed but is reflected off at a very predictable angle.

The angle that the light hits the mirror is called the angle of incidence.

The angle of light that bounces off the mirror is called the angle of reflection.

The Law of Reflection states that the angle of incidence is equal to the angle of reflection.

Plastic wrap is transparent and so nearly all light passes through easily ,

Wax Paper is translucent and so light is blurred or scattered .

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Answer:

True

Explanation:

I assume this is refering to gases such as O2, H2, I2, F2, ect. And possibly the nobel gases which are completly insoluable. As gases they should be given the state (g).

Elemental gases are relatively insoluble in water and should be given the state (g). The given statement is true.

An example of  elemental gas is Helium (He).

Helium belongs to the class of noble gases,  these elements are defined by their low reactivity, also as gases, they do not have color or odor. Helium is part of this group that contains other 5 elements because Helium characteristics are similar to other noble gases, indeed this is the first noble gas in the periodic table. Additionally, helium is an abundant element found in all the universe especially in stars. Helium gas is used to fill balloons.

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Answer:

B. Ernest Rutherford's gold foil experiment

Explanation:

That experiment showed a space with the tiny dense spot, referred to as the nucleus. The experiment involved shooting alpha particles (helium nuclei) at a very thin sheet of gold and then observing.

A chemical equation is an equation showing the formation of new products from reactants.

A chemical reaction is a reaction which involves changes in the composition and chemical properties of substances resulting in the formation of new substances.

A chemical reaction is usually represented by chemical equations.

A balanced chemical equation is one in which the atoms of elements are equal on both sides of the equation.

A net ionic equation shows only the ions that form products.

Therefore, a chemical equation is an equation showing the formation of new products from reactants.

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There is no diagram attached but there are some ways by which you can find it too easily by yourself

Usually energy diagram uses ∆H .

So

So observe∆H whether it. is decreasing or increasing ,

Answer:

It is an amorphous solid and hence also called pseudo solid. So it flows very slowly over thousands of years. It is not visible to the n*ked eye.

Answer:

182.532 [gr.].

Explanation:

1) equation of this reaction is:

2Cu+O₂⇒2CuO;

2) according to the equation made up above, ν(CuO)=ν(Cu); it means ν(Cu)=2.87 (mol.), then

3) m(Cu)=ν(Cu)*M(Cu);

m(Cu)=2.87*63.6=182.532 [gr].

The new pressure is 75.51 mmHg if a sample of carbon monoxide gas is contained in a 345 mL vessel at a temperature of 25 °C. and a pressure of 985 mmHg and the gas is allowed to expand to a new volume of 4.50 litres at a constant temperature.

The gas laws consist of three primary laws: Charles' Law, Boyle's Law and Avogadro's Law (all of which will later combine into the General Gas Equation and Ideal Gas Law).

The pressure on the gas changes, while the temperature remains constant, and we want to find the new volume. So, we will use Boyle's Law, which states there is an inverse relationship between the pressure on a gas and the volume of the gas. The formula is:

[tex]P_1V_1=P_2V_2[/tex]

[tex]P_1 = 985 mm Hg[/tex]

[tex]V_1 = 345 mL[/tex] =

[tex]P_2 = ?[/tex]

[tex]V_2 = 4.50 liters[/tex]

The pressure of the gas is originally 985 mm Hg and the volume is 345 mL.

We are solving for the new volume, so we must isolate the variable V₂.

Now putting all the values in the equation:

[tex]P_1V_1=P_2V_2[/tex]

[tex]985 X 0.345 L=P_2 X 4.50[/tex]

[tex]P_2[/tex] = 75.51 mmHg

Hence, the new pressure is  75.51 mmHg.

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Answer:

(a)Cu2S(s) + O2(g) --> 2Cu(s) + SO2(g)

(b) single displacement reaction

Answer:

Atomic weight of Hydrogen is 1. There are 2 Hydrogen atoms in water molecule. So it is 2. Oxygen atomic weight is 16.0 and adding 2 and 16, we will get 18.18 is the equivalent weight of water.

Explanation:

Hope this helps

The change in enthalpy associated with the change in the water’s temperature is 1254 J.

The amount of heat required to increase the temperature of one gram of a substance by one Celsius degree is known as specific heat.

Enthalpy change will be calculated as:

ΔH = -cmΔT, where

m = mass of water = 50g

c = specific heat of water = 4.18J/g°C

ΔT = change in temperature = 28 - 22 = 6 °C

On putting values in the above equation, we get

ΔH = -(4.18)(50)(6) = -1254 J

Hence change in enthalpy of the reaction is -1254 J.

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The partial atmospheric pressure (atm) of hydrogen in the mixture is 0.59 atm.

Partial pressure of particular gas will be calculated as:

p = nP, where

Moles will be calculated as:

Moles of Hydrogen gas = 2.02g / 2.014g/mol = 1 mole

Moles of Chlorine gas = 35.90g / 70.9g/mol = 0.5 mole

Mole fraction of hydrogen = 1 / (1+0.5) = 0.6

Partial pressure of hydrogen = (0.6)(748) = 448.8 mmHg = 0.59 atm

Hence, required partial atmospheric pressure of hydrogen is 0.59 atm.

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