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Answer:

The new temperature is 200 K.

Explanation:

Charles law gives the relationship between temperature and volume of a gas. It states that volume is directly proportional to temperature such that,

[tex]V\propto T\\\\\dfrac{V_1}{V_2}=\dfrac{T_1}{T_2}[/tex]

We have,

[tex]T_1=100\ K\\\\V_1=500\ mL\\\\V_2=1000\ mL\\\\T_2=?[/tex]

Plugging all the values,

[tex]T_2=\dfrac{V_2T_1}{V_1}\\\\T_2=\dfrac{1000\times 100}{500}\\\\T_2=200\ K[/tex]

So, the new temperature is 200 K.

Answer:

false

Explanation:

Answer:  In a chemical equation, (aq) should be used to indicate that a substance is in solution.

Explanation:

The chemical reaction is represented by putting the reactants at left side of the arrow and products on the right side of the arrow.  The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

The liquids are designated  by symbol (l) and gases are designated  by symbol (g).

In a chemical equation, (aq) should be used to indicate that a substance is in solution.

Answer:

D (aq)

Explanation:

On Edge

Answer:Vinegar Is 5% Acetic Acid And Its Molarity Is 0.833M.

Explanation:

yes

Answer:

I'm assuming you're talking about something like a regular housekey, in which case there are numerous things you can describe!

Its mass: how much it weighs, times the gravity of the system.

Its color: is it silver-colored, or gold, etc.?

Its volume: you could probably calculate this, though it would be hard because it's not a traditional shape, I assume.

Its density: this is mass/volume. It means how many of the atoms are in a given space; how tightly packed the atoms are.

Its tendency to rust / its specific combination of metals or alloys: is it made of copper, tin, steel.. and these are all things that can rust to varying degrees.

Answer:

D.  18,800 J/mol

Explanation:

We need to use the Arrhenius equation to solve for this problem:

[tex]k=Ae^{\frac{-E_a}{RT}[/tex], where k is the rate constant, A is the frequency factor, [tex]E_a[/tex] is the activation energy, R is the gas constant, and T is the temperature in Kelvins.

We want to find the value of [tex]E_a[/tex], so let's plug some of the information we have into the equation. The gas constant we can use here is 8.31 J/mol-K.

At 0°C, which is 0 + 273 = 273 Kelvins, the rate constant k is [tex]4.6*10^{-2}[/tex]. So:

[tex]k=Ae^{\frac{-E_a}{RT}[/tex]

[tex]4.6*10^{-2}=Ae^{\frac{-E_a}{8.31*273}[/tex]

At 20°C, which is 20 + 273 = 293 Kelvins, the rate constant k is [tex]8.1*10^{-2}[/tex]. So:

[tex]k=Ae^{\frac{-E_a}{RT}[/tex]

[tex]8.1*10^{-2}=Ae^{\frac{-E_a}{8.31*293}[/tex]

We now have two equations and two variables to solve for. We just want to find Ea, so let's write the first equation for A in terms of Ea:

[tex]4.6*10^{-2}=Ae^{\frac{-E_a}{8.31*273}[/tex]

[tex]A=\frac{4.6*10^{-2}}{e^{\frac{-E_a}{8.31*273}} }[/tex]

Plug this in for A in the second equation:

[tex]8.1*10^{-2}=Ae^{\frac{-E_a}{8.31*293}[/tex]

[tex]8.1*10^{-2}=\frac{4.6*10^{-2}}{e^{\frac{-E_a}{8.31*273}} }e^{\frac{-E_a}{8.31*293}[/tex]

After some troublesome manipulation, the answer should come down to be approximately:

Ea = 18,800 J/mol

The answer is thus D.

Answer:

500

Explanation:

Answer:

1.

2.

Explanation:

Protons and neutrons are located at the center of an atom which is nucleus .

Electrons will orbit around the nucleus .

Answer:

Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.

Hope this helps :)

Answer:

this is a contact process, and the energy released means it is a exothermic process

Answer:

N2+O2-> 2NO

Explanation:

An endothermic reaction refers to a reaction in which heat taken in. This implies that heat is usually absorbed by the reaction system. The enthalpy of reaction for an endothermic reaction is always positive.

The triple bond between two Nitrogen atoms in N2 gas is very strong due to its small size and the triple bond thus the nitrogen molecule has a high dissociation energy. This accounts for the large amount of energy required to break the triple bond between nitrogen atoms in the nitrogen molecule. This causes the oxidation of Nitrogen molecule to NO to be largely endothermic.

Answer:

136.36 mL

Explanation:

Here we have to use the dilution formula

From C1V1= C2V2

Where;

C1= initial concentration of the solution= 12.0 M

C2= final concentration of the solution= 2.20 M

V1 = initial volume of the solution= 25.0 ml

V2= final volume of the solution= ?????

Then recall;

C1V1=C2V2

V2 = C1V1/C2

Substituting values from the parameters given;

V2= 12.0 × 25.0 / 2.20

V2= 136.36 mL

Answer: the line Spectra of hydrogen lies between the ultra-violet, visible light and infra-red of the electro magnetic spectrum

Explanation:

Electromagnetic radiation spans an wide range of wavelengths and frequencies. This range is called the electromagnetic spectrum. The electromagnetic spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The 7 regions includes; radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.

lower-energy radiation, such as radio waves, is expressed as frequency while microwaves, infrared, visible and UV light are usually expressed as wavelength and finally, higher-energy radiation such as X-rays and gamma rays, is expressed in terms of energy per photon.

Therefore, hydrogen lies between the ultra-violet, visible light and infra-red region of the electro magnetic spectrum.

Answer:

84.07grams of carbon in 7 mole of carbon.

Explanation:

7 mol×12.01g/1mol

=84.07g

Answer:

10.28 mol

Explanation:

S + 2O = SO2

(atm x L) ÷ (0.0821 x K)

(3.45 x 45.6) ÷ (0.0821 x 373)

=5.13726

Then round it to significant figures

=5.14

5.14 mol SO2 x (2 mol O ÷ 1 mol SO2)

=10.28 mol O

The number of moles of oxygen atoms in 5.14 moles of SO₂ gas is equal to 10.28 mol.

The ideal gas law is used to describe an equation of the state of an ideal gas. The ideal gas equation can be defined as the product of the volume (V) and the pressure (P) of 1-mole ideal gas is equal to the product of the universal gas constant (R) and absolute temperature.

The ideal gas equation can be expressed in the mathematical form as follows:

PV = nRT

Where n is the moles of a gas, P is the pressure,  V is the volume of the gas,  and R is the universal gas constant.

Given, the volume of sulfur dioxide, V = 45.6 L

The temperature of SO₂ gas, T = 373 K

The universal gas constant, R =0.082 atmL /K mol

The pressure of the SO₂ gas, P = 3.45 atm

Substituting the values R, V, P, and T in the gas law equation, we get:

The number of moles of sulphur dioxide, n = PV/RT

n = 3.45 ×45.6/(0.082 × 373)

n = 5.14 mol

The number of moles SO₂ gas = 5.14

Moles of oxygen atoms in 5.14 moles of SO₂ = 2 × 5.14 = 10.28 mol

Learn more about ideal gas equation, here:

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Answer: The time for activity to fell from 800 counts per second to 200 counts per second is 20 minutes

Explanation:

Expression for rate law for first order kinetics is given by:

[tex]t=\frac{2.303}{k}\log\frac{a}{a-x}[/tex]

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process  

a) for finding the rate constant:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

[tex]t_{\frac{1}{2}}=\frac{0.693}{k}[/tex]

[tex]k=\frac{0.693}{10min}=0.0693min^{-1}[/tex]

b) for activity to fell from 800 counts per second to 200 counts per second.

[tex]t=\frac{2.303}{0.0693}\log\frac{800}{200}[/tex]

[tex]t=20minutes[/tex]

The time for activity to fell from 800 counts per second to 200 counts per second is 20 minutes

Answer:

The increase in mass is not due to the heating but due to the reaction of the metal with oxygen in air to form an oxide

Explanation:

When a metal is heated in the presence of air, oxygen present in air reacts with the metal to form the oxide of the metal. The mass of this oxide is greater than the original metal by the amount of oxygen added to the metal during the reaction.

The above reaction is known as an oxidation reaction. Generally,

metal M + O2 ---> MO2

Answer:

Because you don't want 2 different things mixing together unless their supposed to be mixed together

Explanation:

The hand cream used as a separating agent when the flubber was handled because it is not about 2 different things mixing together unless their supposed to be mixed together.

What is separating agent ?

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Answer:

0,1 mol

Explanation:

We know that the formula of concentration is C= moles of solute/ volume  

0,4 M= moles of solute/ 250 mL

Convert mL to L      250 mL =0,25 L

0,4 M x 0,25 L= moles of solute

0,1 moles= moles of solute

Answer:

equal and opposite reaction

Explanation:

for ever action forces there is a equal and opposite  forces

so every interaction theres theres a pair of forces acting on each other

this is newtons 3rd law

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Answer:

Heating the CuSO4. 5H2O crystals causes then to loose the water of crystallisation that is the 5H2O part. It becomes anhydrous copper sulphate. Its colour changes to white from blue.

Answer:

Chemical change

Explanation:

Rust cannot be done without using chemicals.

Answer:

Option B.) Chemical Change

Answer:

THE NEW VOLUME OF THE GAS SAMPLE IS 40 L AT 1 atm AND 400 K

Explanation:

Using general gas equation which combines Boyle's and Charles' law, the volume of the gas sample at the new pressure and temperature can be obtained.

P1V1/T1 = P2V2/T2

P1 = Initial pressure = 2 atm

V1 = Initial volume = 15 L

T1 = Initial temperature = 300 K

P2 = Final pressure = 1 atm

T2 = Final temperature = 400 K

V2 = Final volume = unknown

Substituting the values into the equation, we have;

V2 = P1V1T2 / P2 T1

V2 = 2 * 15 * 400 / 1 * 300

V2 = 12 000/ 300

V2 = 40 L

The new volume after the pressure was reduced to 1 atm and the temperature increased to 400 K is 40 L.

Answer:

(CH3)3N(aq)

Explanation:

We have to think of the definition of acid and base in the sense of Brownstead-Lowry. The Brønsted–Lowry theory is an acid–base reaction theory which was proposed independently by Johannes Nicolaus Brønsted and Thomas Martin Lowry in 1923.

A Bronsted-Lowry acid is a chemical species that donates one or more hydrogen ions in a reaction. In contrast, a Bronsted-Lowry base accepts hydrogen ions. When it donates its proton, the acid becomes its conjugate base. A more general approach to the theory is viewing an acid as a proton donor and a base as a proton acceptor.

If we look at the reaction closely, we can see that (CH3)3N(aq) accepted a proton. According to the definition above, we will have to classify (CH3)3N(aq) as a base. Hence the answer.

a mushroom

Explanation:

it don't make sense because the tree is not food chain

Answer:

they are both primary producers so i would say they are at the same level, hope this helps

Answer:

A meteor shower happens when Earth passes through the path of a comet. When this happens, the bits of comet debris, most no larger than a grain of sand, create streaks of light in the night sky as they burn up in Earth's atmosphere. Bits of debris which enter Earth's atmosphere are called meteors.

Answer energy,mass,speed of light

Explanation:

Edge

Answer

energy, mass, speed of light

Explanation:

Edge2020

Answer:

0 being the lowist 14 being the hieist 0 is the most acidic 14 is the hieist base 7 is nutrol

Explanation:

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14