6. Balance the following equations (show work for TWO)
Na + _MgF2
NaCl
_Mg +_
Na +
-
HCI
02
_C2H6+____02
_NaF + Mg
_Na+_ _C12
_MgCl2 + H2
Na20
_CO2+_H20

Answer:

It's

Explanation:

Pbo + c

= pb + co2

While balancing it becomes

2pbo + c = 2pb + co2

(I was also doing same qn)

Answer:

Life in the Han Dynasty (206 BCE - 220 CE) differed significantly from today in family, government, social structure, religion, and trade. For example, the Han Dynasty emphasized a patriarchal family structure, where the eldest male held authority, and filial piety was highly valued. In contrast, contemporary societies embrace more egalitarian family dynamics with shared decision-making.

The government system of the Han Dynasty relied on a centralized bureaucracy and emphasized meritocracy, while modern societies often adopted democratic systems. Socially, the Han Dynasty followed a hierarchical model influenced by Confucian principles, whereas contemporary societies strive for greater equality and social mobility.

Religion in the Han Dynasty combined Confucianism, Taoism, and Buddhism, whereas modern societies exhibit diverse religious beliefs. Lastly, trade in the Han Dynasty thrived along the Silk Road, while modern trade was globally interconnected and facilitated by technological advancements. These differences highlight the evolution of society over time.

Explanation:

Answer:

Explanation:

well it needs water like us to stay alive

Answer:

(of an object, substance, or resource) of great value; not to be wasted or treated carelessly.

Answer:

oxygen (O2 )

Explanation:

Answer:

To convert from °C to °F:

\(\boxed{ \mathfrak{(^0 C \times 1.8) + 32 = ^0F}}\)

The temperature in °C is (-35)°C

Applying the formula:

=> -35 × 1.8 + 32

=> -63 + 32

=> -31 °F

- - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - -

To convert from °C to K:

\(\boxed{\mathfrak{^0 C+273.15=K}}\)

The temperature in °C = (-35)°C

Applying the formula:

=> -35 + 273.15

=> 238.15 K

The number of moles of the gas sample in the 2.0 L container at 373 K and 403 KPa is 0.26 mole (1st option)

The ideal gas equation is illustrated as shown below:

PV = nRT

Where

With the above formula, we can obtain the number of moles of the gas as follow:

PV = nRT

403 × 02.04 = n × 8.314 × 373

806 = n × 3101.122

Divide both sides by 3101.122

n = 806 / 3101.122

n = 0.26 mole

Thus, we can conclude that the number of mole of the gas is 0.26 mole (1st option)

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Answer:

Answer:

Speeds up

Explanation:

Explanation: The concentration of a solution helps us to determine the collision speed between particles in a molecule or compound. Knowing the concentrations of components in solutions can help determine the health of the world.

Half-reaction for the oxidation of the manganese in MnCO3 to MnO2 in neutral groundwater is : MnCO₃ + 2H₂O → MnO₂  + HCO₃⁻ + 2e- + 3H+

A half-reaction is the part of overall reaction that represents, either  oxidation or a reduction.

MnCO₃ → MnO₂  + HCO₃⁻

This equation is not balanced.

Oxidation number of Mn changes from +2 in MnCO₃  to +4 in MnO₂ , thus two electrons must be added to the right.

Then the equation becomes; MnCO₃  → MnO₂  + HCO₃⁻ + 2e-

In terms of electrons, now the reaction is balanced. But, in terms of charges it is not.

In reactant side, total charge = 0 and in the product side, total charge = -1 + (-2) = -3

To balance the excess negative charge, add add 3 H+ on the product side; MnCO₃ → MnO₂  + HCO₃⁻ + 2e- + 3H+

In terms of charges, now the reaction is balanced but in terms of atoms it is not.

There is excesses of Hydrogen and Oxygen atoms. So, to balance this, add H20 to the reactant side to balance H and O atoms

This gives; MnCO₃ + 2H₂O → MnO₂  + HCO₃⁻ + 2e- + 3H+

Now, the equation is balanced.

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Answer:

They can be turned into positive ions.

Explanation:

neutral atoms can be turned into positively charged ions by removing one or more electrons. Atoms that gain extra electrons become negatively charged. A neutral chlorine atom, for example, contains 17 protons and 17 electrons . By adding one more electron we get a negatively charged Ion with a net charge of negative 1

Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

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Answer:

ok

Explanation:

Answer:

\( \underline{1}Zn +\underline{ 2}HCL\to \underline{1}ZnCl_2+\underline{1}H_2 \)

Explanation:

Here we need to balance the given reaction. The reaction is ,

\( \underline{\quad} Zn +\underline{\quad}HCl \to \underline{\quad}ZnCl_2+\underline{\quad}H_2\)

Firstly let's make a table here to see the number of elements in LHS and RHS as ,

\( \boxed{\begin{tabular}{c|c} LHS & RHS \\\\\cline{1-2}\\\\ Zn = 1 & Zn = 1 \\\\ H =1$\times$2=2& H = 2 \\\\ Cl =1$\times$2=2 & H =2\end{tabular}} \)

Our final reaction is,

\( \underline{1}Zn +\underline{ 2}HCL\to \underline{1}ZnCl_2+\underline{1}H_2 \)

This is our required answer!

Answer:

True

Explanation:

Weather is short term, climate is over the long term

Answer:

true, different weather patterns are found all around the world at different times, there could be a hurricane in the gulf of mexico and as a result of the storm tornadoes could break out in texas

Explanation:

Answer:

Q = 81.59kJ

Explanation:

Hello,

The heat of condensation is the energy required to to convert the steam into water.

Mass = 195g

Specific heat capacity of water = 4.184J/g°C

Initial temperature(T1) = 100°C

Final temperature(T2) = 0°C

Heat energy (Q) = ?

Heat energy (Q) = mc∇T

M = mass of the substance

C = specific heat capacity of the substance

∇T = T2 - T1 = change in temperature of the substance

Q = 195 × 4.184 × (0 - 100)

Q = -81588J

Q = -81.588kJ

The heat required for the condensation of 195g of steam is 81.59kJ

Answer:

dt=20.08

Explanation:

Q=msdt

840=10*4.184*dt

dt=840/(10*4.184)

dt=20.08

The moles of N2 formed when 38 moles of CuO is consumed 12.66 mol.

What is moles?

A mole of a substance can be defined as an amount of substance having 6.022 x 10^23 particles in it. This number is known as Avogadro's number. All the balanced chemical equations are written using number of moles of reactants and products.

The balanced chemical equation of the reaction can be written as,

2 NH3 + 3 CuO ------> 3 Cu + N2 + 3 H2O

Here, 2 moles of ammonia is reacting with 3 moles of CuO to give 3 moles of Cu, 1 mole of N2 and 3 moles of water. So when 38 moles of CuO is consumed,

Moles of N2 = 38 x 1 / 3 = 12.66 mol.

Therefore, 12.66 mole of N2 is formed when 38 moles of CuO is consumed in the reaction.

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Answer:

1.66 x 10^24 atoms

Explanation:

Grams - Moles - Atoms

2.750 mol / 1  x  6.022 x 10^23 atoms / 1 mol

I hope this helps!

Answer:

Magnetic force obeys an inverse square law with distance. ... If the distance between two magnets is doubled the magnetic force between them will fall to a quarter of the initial value. (F/4) If the distance between two magnets is halved the magnetic force between them will increase to four times the initial value.

Answer:

True

Explanation:

In 1909 Ernest Rutherford proposed to Geiger and Marsden to conduct an experiment in which they would have to launch alpha particles from a radioactive source against a gold foil a few atoms thick.

The aim of the experiment was to corroborate Rutherford's idea that the particles would pass through the metal foil with little deviation.

Rutherford's interpretation of the experimental results gave rise to a new atomic model, and concluded that the mass of the atom was concentrated in a small region of positive charges that impeded the passage of alpha particles. He suggested a new model in which the atom had a nucleus or center in which the mass and the positive charge are concentrated, and that in the extra nuclear zone are the negatively charged electrons.

Container 3 has the gas stored at the highest temperature.

Temperature is a measure of the average kinetic energy of the particles in a substance. In the given table, it is stated that container 3 has a large number of collisions with container walls, high average kinetic energy, and large number of particles with large spaces between them.

These properties indicate that the gas in container 3 has higher kinetic energy and more vigorous movement compared to the other containers.

Container 1 has a low number of collisions with container walls and a medium average kinetic energy. This suggests that the gas in container 1 has lower energy and less movement than the gas in container 3.

Container 2 has a large number of collisions with container walls, but it also has a small number of particles with little spaces between them. While the collisions may be frequent, the limited number of particles and the lack of space between them may result in lower overall kinetic energy compared to container 3.

Container 4 has few collisions with container walls, low average kinetic energy, and a small number of particles. These properties indicate that the gas in container 4 has the lowest energy and least movement among all the containers.

Container 3

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hope it is

Answer:

This question is incomplete.

Explanation:

This question is incomplete because of the absence of given mass and volume, however, the steps below will help solve the completed question. The molarity (M) of a solution is the number of moles of solute per liter of solvent. The formula is illustrated below;

Molarity = number of moles (n) / volume (in liter or dm³)

To calculate the number of moles of NaC₂H₃O₂, we say

number of moles (n) =

given or measured mass of NaC₂H₃O₂ ÷ molar mass of NaC₂H₃O₂

The volume of the solvent must be in liter (same as dm³). Thus, to convert mL to liter, we divide by 1000

The unit for Molarity is M (Molar concentration), mol/L or mol/dm³

Answer:

Q = 440 J

Explanation:

Given data:

Heat required = ?

Initial temperature = 25°C

Final temperature = 40°C

Mass in gram  = 20 g

Specific heat capacity = 1.1 J/g.°C

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 40°C - 20°C

ΔT = 20°C

Q = 20 g×1.1 J/g.°C × 20°C

Q = 440 J

Answer:

Explanation:

From the given information:

The equation for the reaction can be represented as:

\(2SO_2 + O_2 \to 2SO_3\)

The I.C.E table can be represented as:

                     2SO₂              O₂                   2SO₃

Initial:             14                  2.6                     0

Change:        -2x                -x                      +2x

Equilibrium:   14 - 2x          2.6 - x                2x

However, Since the amount of sulfur trioxide gas to be 1.6 mol.

SO₃ = 2x,

then x = 1.6/2

x = 0.8 mol

For 2SO₂; we have 14 - 2x

= 14 - 2(0.8)

= 14 - 1.6

= 12.4 mol

For O₂; we have 2.6 - x

= 2.6 - 1.6

= 1.0 mol

Thus;

[SO₂] = moles / volume = ( 12.4/50) = 0.248 M ,

[O₂] = 1/50 = 0.02 M ,  

[SO₃] = 1.6/50 = 0.032 M

Kc = [SO₃]² / [SO₂]² [O₂]

= ( 0.032²) / ( 0.248² x 0.02)

= 0.8325

Recall that; the equilibrium constant for the reaction \(2SO_2 + O_2 \to 2SO_3\) = 0.8325;

If we want to find:

\(SO_2 + \dfrac{1}{2}O_2 \to SO_3\)

Then:

\(K_c = (0.8325)^{1/2}\)

\(\mathbf{K_c = 0.912}\)

Since no temperature is given to use in the question, it will be impossible to find the final temperature of the mixture.

The diatomic gas ( X2 ) is N₂ dinitrogen.

Dinitrogen is a chemical compound fashioned from the covalent bonding of two nitrogen atoms. it's far a colorless, odorless gas at room temperature and pressure, which makes up about seventy-eight % of the Earth's environment.

Diatomic gas is a chemical compound formed from the covalent bonding of two nitrogen atoms. it's miles drab, odorless gasoline at room temperature and stress, which makes up about seventy eight % of the Earth's surroundings.

Volume = 6.4 L

Pressure = 1.3 atm

Temperature = 25 C = 298 K

R = 0.08206 L.atm/mol.K

P * V = n * R * T

1.3 atm * 6.4 L = n * 0.08206 L.atm/mol.K * 298 K

n = 0.34 moles

difference of mass is the mass of gas = 9.5 g

Molar mass = Mass / No. of moles = 9.5 g / 0.34 moles = 27.9 g/mol

diatomic gas with molar mass 28 g/mol is N2

Hence the diatomic molecule is N2      

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