write the balanced equation fr this chemical reaction _Mg + _O2 -> _MgO​

Answer:

P₂ = 0.13880 atm

Explanation:

Given info are;

Initial volume = 13.0 L

Initial pressure = 3.15 atm

Initial temperature = 213.0 K

Final temperature = 398.0 K

Final volume = 35.0 L

Final pressure = ?

Note;

Base on general gas equation:

P₁V₁/T₁ = P₂V₂/T₂

Formula = P₁V₁/T₁ = P₂V₂/T₂  

Solution:

P₂ = P₁V₁ T₂/ T₁ V₂

P₂ = 3.15 atm x 13.0 L x 398.0k/213.0 k x 35.0 L  

P₂ = 1034.8 atm .L.K/ 7455 K.L

P₂ = 0.13880617035

P₂ = 0.13880 atm  

When we multiply or divide the values the number of significant figures must be equal to the less number of significant figures in given value.

Thus we will include five significant figures in answer because 1034.8 have five significant figure.

[RevyBreeze]

Ideal gas law is valid only for ideal gas not for vanderwaal gas. Combined Boyle's and Charles' gas law is used here. Therefore the new pressure of gas is 0.13880 atm .

Ideal gas equation is the mathematical expression that relates pressure volume and temperature.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of gas

V= volume of gas

n =number of moles of gas

T =temperature of gas

R = Gas constant = 0.0821 L.atm/K.mol

Combining Boyle's and Charles' gas law

P₁V₁/T₁ = P₂V₂/T₂

P₂ = P₁V₁ T₂/ T₁ V₂

P₂ = 3.15 atm x 13.0 L x 398.0k/213.0 k x 35.0 L  

P₂ = 1034.8 atm .L.K/ 7455 K.L

P₂ = 0.13880617035

P₂ = 0.13880 atm  

Therefore the new pressure of  gas is 0.13880 atm  when the temperature is changed to 398.0 K  and volume is increased to 35.0 liters.

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Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles KMnO4, or 158.033949 grams.

Explanation:

I belive that is correct,hope it helps:)

This problem is providing the mass of aspartame as 10 g and asks for the moles in such amount. At the end, after applying a mole-mass proportional factor, the answer turns out to be 0.03 mol.

In chemistry, mole-mass relationships are mathematical procedures we use in order to calculate grams from moles or vice versa, according to a given requirement.

In such a way, when given 10 g of aspartame and required to calculate moles, we first need to calculate its molar mass as follows:

\(MM=14*12.01+18*1.01+2*14.01+5*16.0\\\\MM=294.29g/mol\)

Then, we apply the following proportional factor cancelling out the grams and leading to moles:

\(10g*\frac{1mol}{294.29g} =0.03mol\)

Which has one significant figure as well as the initial 10 g.

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The age of the reef limestones in different locations can be determined using radiometric dating techniques, such as uranium-lead dating or carbon dating.

If the ages of the reef limestones in section 3 and section 7 are found to be similar, then it is likely that they are of the same age. However, there could be local variations in the age of the reef limestones due to differences in geological history or environmental factors.

Radiometric dating is a method used to determine the age of rocks or fossils by measuring the decay of radioactive isotopes within them. The rate of decay is constant, allowing scientists to calculate the age of the sample by measuring the ratio of isotopes present.

Therefore, a detailed geological analysis of the two sections would be needed to determine the age relationship between the massive reef limestones of section 3 and section 7.

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The correct nuclear equation for 24195Am's alpha decay is a, as it involves a nucleus releasing an alpha particle, transforming into a different nucleus. Other options represent beta, electron, and neutron decays. Correct answer is a. 241 95 Am yields 4 2 He + 237 93 Np

The nuclear equation for the alpha decay of 24195Am is a. 24195Am yields 42He + 23793Np. This is because alpha decay is a type of radioactive decay in which a nucleus releases an alpha particle (a helium nucleus) and thereby transforms (or decays) into a different nucleus. The mass number of the parent nucleus decreases by four and the atomic number decreases by two when an alpha particle is emitted.

To balance the equation, the mass and atomic numbers of the products must add up to the mass and atomic numbers of the reactant. Therefore, the correct nuclear equation for the alpha decay of 24195Am is:24195Am → 42He + 23793Np

(a)The other options (b-e) represent different types of nuclear decay, such as beta decay (b, d), electron capture

(c), and neutron capture

(e). Beta decay involves the emission of a beta particle (an electron or positron), while electron capture involves the absorption of an electron by a nucleus. Neutron capture involves the absorption of a neutron by a nucleus, while alpha decay involves the emission of an alpha particle (a helium nucleus).Therefore, the correct answer is option a.

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Dry ice in an ice-cream cart disappears  on sublimation .

In general , because of the process of absorption of heat , dry ice when present in the solid state is directly transformed directly into a gas without being converted into a liquid state and thus disappears. Dry ice get physical transformation by the process of sublimation that is from solid to the gaseous state without melting into a liquid.

Hence , we  can say that sublimation is a process that is used to explain  about the process of snow and ice changing into water vapor (gas) in the air without melting into water. Dry ice is generally present in solid state, that get to sublimate, or turn to gas, at a chilly -78.5 °C.

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Answer:  P2 = 0.858 atm

Explanation:

Use the combined gas law:  P1V1/T1 = P2V2/T2,

where the subscripts are the initial (1) and final (2) states.  Temperature must be in Kelvin.  We want P2, so rearrange the equation to solve for P2:

P2 = P1(V1/V2)(T2/T1)

Note how I've arranged the volume and temperature values:  as ratios.  Now it is easy to cancel units and see what is going to happen to the pressure if we lower the temperature.  Since the pressure change is a function of (T2/T1), and we are lowering the temperature (T2), we'd expect this to decrease the pressure.

No information is given on volume, so we'll assume a convenient value of 1 liter.  Now enter the data:

P2 = (0.917atm)*(1)*(322K/344K)

P2 = 0.858 atm

If solutions of barium nitrate and sodium sulfate are mixed and then poured into a filter, the solid remaining on the filter will be Barium sulfate. So option B is correct.

This occurs because barium nitrate and sodium sulfate undergo a double displacement reaction, resulting in the formation of the insoluble salt barium sulfate, which precipitates out of the solution and can be filtered. The reaction can be represented as:

Ba(NO3)2 + Na2SO4 -> BaSO4 + 2NaNO3

Barium sulfate is a solid salt that is insoluble in water, meaning it does not dissolve and remains as a solid precipitate. This allows the solid barium sulfate to be easily separated from the solution through filtration.

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Answer:

Barium Sulfate

Explanation:

BaSO4 is insoluble in water so it remains on a filter.

The answer is (3)

Answer:

I think the answer is Mechanical advantage is a measure of how much your force is multipled efficiency is measure of how much of the work you do actually goes to moving the thing you are trying to move.

Adding more pulleys may increase the mechanical advantage but, it also increases the amount of extra stuff you are moving.

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pH of the buffer solution is 0.18.

The following expression can be used to determine the pH of an acidic buffer solution:

pH = pka + log ([A-] / [HA])

We can determine the salt and acid concentrations by changing the supplied values in the expression above.

[Salt] = 6 M

[Acid] =  4 M

Change the values in the equation above.

pH = 1.32 * 10⁻⁵ + log

pH = 1.32 * 10⁻⁵ + 0.17609

pH = 0.0000132 + 0.17609

pH = 0.1761032

pH = 0.18

As a result, the buffer solution's pH is 0.18.

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Answer:

The volume of H2 with 0.02 moles at 45° C and 998 mmHg is 0.089 Liters

Explanation:

The ideal gas law states that pressure, volume and temperature of a gas is related to it's number of moles.

Formula:

PV = nRT

Parameters:

Volume = ?

Number of moles = 0.24 moles

Temperature = 45° C

Universal gas constant, R = 8. 314 J/mol. K

Pressure = 998 mmHg

Volume = 0.24 × 8.314 × 45 ÷ 998

V = 89.7912 ÷ 998

V = 0. 0899 Liters.

Therefore, the volume is 0.089 Liters.

First, it combines with carbon dioxide in the soil to form a weak acid called carbonic acid. ... Carbonic acid slowly dissolves away minerals in rock, especially the carbonate minerals that make up limestone and marble. The weak acid decomposes the insoluble rock into watersoluble products that move into the groundwater.

In 2CaCO3 there are 3 elements

I hope that helped you! If you have any further questions comment down below or message me! Good luck!

Answer:

Explanation:

lo8

A  formula unit of the nitrate salt of Q is Q(NO3)2.

The IUPAC nomenclature was put together by the international Union of Pure and applied chemistry in order to have a uniform way of naming compounds.

We shall now find the names of the compounds;

1) Na* and HPO4²- ; sodium hydrogen tetraoxophoshate V

2) Potassium cation and cyanide anion ; Potassium cyanide

3) Calcium cation and hypochlorite anion; Calcium oxochlorate I

Knowing that the  valency of NO3^- is one and that the compound formed between Q and  CO3²- has the formula QCO3 we can conclude that a formula unit of its nitrate salt is Q(NO3)2.

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Therefore, the phase change from liquid bromine to gaseous bromine will become spontaneous at a temperature of 303.8 K.

Gibbs free energy (often denoted as G) is a thermodynamic function that describes the maximum amount of useful work that can be obtained from a chemical reaction or physical change at constant temperature and pressure. It is named after the American scientist Josiah Willard Gibbs who introduced it in the late 19th century. Gibbs free energy is an important concept in chemistry and physics, and is used to predict the feasibility and direction of chemical reactions, phase transitions, and other thermodynamic processes. It is also useful in the design and optimization of industrial processes and materials.

Here,

The spontaneity of a process is determined by the change in Gibbs free energy (ΔG) of the system. The equation relating ΔG to ΔH, ΔS, and temperature (T) is:

ΔG = ΔH - TΔS

For a process to be spontaneous, ΔG must be negative. Setting ΔG to zero and solving for T gives the temperature at which the process becomes spontaneous:

0 = ΔH - TΔS

T = ΔH/ΔS

Substituting the given values, we get:

T = (30.9 kJ/mol) / (102 J/mol*K) = 303.8 K

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2 C4H10 + 13 O2 → 8 CO2 + 10 H2O.

Answer:

15 grams

Explanation:

The mass in grams of a sample of Bi with 7.35 1023 atoms should be 255 grams.

A substance's mass is measured in grams per mole, or molar mass. The molar mass of a substance can be determined, as demonstrated in this video, by adding the molar masses of the substance's constituent atoms. The substance's molar mass can then be used to determine the number of moles in the substance and converted to mass.

The molar mass of Bi is 208.98 g/mol.

1 mole Bi = 208.98 g/mol = 6.023×10²³ no of atoms

So, the mass in grams should be

mass = ( 208.98 g/mol ×7.35 × 10²³) ÷ (6.023×10²³)

mass = 255 grams.

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Yes, Christopher Gardner's son faced challenges during this time. One of the challenges he faced was homelessness and poverty, as he and his father struggled to make ends meet while living on the streets.

Without a secure place to reside, a person is said to be homeless. This condition can be brought on by a number of things, including poverty, unemployment, mental illness, and addiction. Increased risk of sickness, exposure to violence, and lack of access to basic essentials like food, water, and shelter are just a few of the detrimental effects of homelessness on a person's health and wellbeing. It takes a mix of governmental changes and supportive services to help people rebuild their lives to combat homelessness, a complicated and enduring problem that impacts people and communities all over the world.

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Answer:

B

Explanation: Since you need this quick, its because it needs to respond to the environment. I dont remember the exact term  

Molar mass of NaCl:-

Now

Answer:

5000 cal X 4.184 J/cal =

Explanation:

20,920 jules