The zinc-air battery is a less expensive alternative to silver batteries for use in hearing aids. The cell reaction is2Zn(s) + O₂(g) → 2ZnO(s) A new battery weighs 0.275 g. The zinc accounts for exactly 1/10 of the mass, and the oxygen does not contribute to the mass because it is supplied by the air.(a) How much electricity (in C) can the battery deliver?

Answer:

The answer would be Metals.

The results of the experiments can be said to be in line with the law of multiple proportions.

The law of multiple proportions states that when two elements combine to form two or more compounds, the ratio of the masses of one element that mix with a fixed mass of the other element can be expressed in whole numbers.

In the two experiments, it is obvious that the ratio of the copper to the oxygen in the compounds are almost the same and this is in line with the statement of the law of multiple proportions.

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If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.

What is pressure?

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Various units are used to express pressure. Some of these are units of force divided by units of area. For example, the SI unit of pressure, Pascal (Pa), is 1 Newton per square meter (N/m2). Similarly, pounds force per square inch (psi, symbol lbf/in2) is the traditional unit of pressure in imperial and US systems. Pressure can also be expressed as standard atmospheric pressure. Atmospheric pressure (atm) is equal to this pressure and torr is defined as 1/760 of this. Manometric units such as centimeters of water, millimeters of mercury, and inches of mercury are used to express pressure as the height of a particular liquid column within a manometer.

If the balloon is closed, then yes, both volume and pressure will increase when the gas inside is heated.

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The molarity of the RbOH solution required to neutralize H₂SO₄ solution is 0.21M.

The reaction equation of RbOH and H₂SO₄ is,

RbOH + H₂SO₄ → Rb₂SO₄ + H₂O

So, as per the reaction, the moles of RbOh are equal to moles of H₂SO₄ neutralize each other completely,

So, we can write,

Moles of RbOH = Moles of H₂SO₄

We also know, Molarity x volume = Moles,

So,

Molarity of RbOH x Volume of RbOH = Molarity of H₂SO₄ x Volume of H₂SO₄

Putting values,

Molarity of RbOH x 25 = 48 x 0.112

Molarity of RbOH = 48 x 0.112/25

Molarity of RbOh = 0.21M.

So, the molarity of the RbOH solution is 0.21M

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The naming of compound can be obtained by following the IUPAC principle. This is shown below:

For the 1st diagram:

Thus, the IUPAC name for the compound is: 3,3-dimethylpentane

For the 2nd diagram:

Thus, the IUPAC name for the compound is: pentene

For the 3rd diagram:

Thus, the IUPAC name for the compound is: 2,2,3-trimethylhexane

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The smallest element in Period 2 is Fluorine. As we go across a period, from left to right, the atomic number increases. We are adding one proton to the nucleus and one electron to the valence shell. The force of attraction between the nucleus (positive) and the valence electrons (negative) also increases from left to right. That's why the atomic radius decreases from left to right, and the elements on the right side of the periodic table are smaller than the elements on the left.

Answer: Fluorine

Answer:

Thermal energy is heat energy.

When it is removed, the temperature of particle decreases due to decrease in the internal energy involving that particle.

Motion of the particle decreases due to decrease in kinetic energy caused by reduction in the internal energy.

The state of the particle changes from that current state e.g liquid or gas to a solid state due to increase in the latent heat of vapourisation.

With thermodynamics we can find that by giving energy to a substance the temperature increases and after a certain value it can change from solid to liquid and vapor state

In the opposite case, as the energy of a substance decreases, the temperature decreases and goes from a gaseous state to a liquid and a solid.

Thermodynamics study the changes that substances have as their energy changes, finding macroscopic relationships such as temperature, state, pressure and volume.

The temperature of a substance is a measure of the internal energy of the particles and the thermodynamic state of a substance can be solid, liquid or gaseous depending on whether the shape and volume is maintained.

Let's analyze what happens when we increase the energy of a substance.

In this case, the particles that form has more energy, so the temperature of the substance increases, if the energy is enough to break any bonds, the substance can go from the solid state to the liquid and by continuing to increase the energy it can be break all the bonds going from the liquid to the gaseous state.

In the opposite case, when the energy of the particles decreases, it has smaller movements, therefore its temperature decreases and if some bonds are formed, the substance stops from the gaseous state to the liquid state and if the energy continues to decrease, more bonds are formed passing the liquid state to solid.

In conclusion, with the change in energy, the temperature changes in the same direction and after a certain value it can go from solid to liquid and as the temperature increases more it can go from liquid to gas.

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The Calvin cycle must occur before the molecule exits g3p is 3.

Three Calvin cycles are required to make the G3P molecule. This allows the G3P molecule to break out of the cycle and continue making glucose. All three requirements are required:

Chlorophyll pigments, chloroplast "theater" and enzyme catalysis. In the first stage, it converts light energy into chemical energy, which until then is stored in ATP and NADPH molecules.

In the second step of the Calvin Cycle, the carbon-fixed 3-PGA molecule is converted to the monosaccharide molecule glyceraldehyde-3-phosphate. This stage uses energy from ATP and NADPH produced in the light-dependent reactions of photosynthesis. The Calvin cycle harnesses the chemical energy of ATP and reduces the power of NADPH from a light-dependent reaction to produce tricarbonate.

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The fiber equivalent diameter of the silk fiber is approximately 34.02 μm.

To calculate the fiber equivalent diameter, first, we need to convert the linear density from denier (den) to grams per meter (g/m). Then, we can use the density and linear density to find the cross-sectional area, which will be used to calculate the diameter.
1 denier is equivalent to 1 g per 9000 meters. Therefore, 1.06 den equals:
1.06 den × (1 g / 9000 m) = 0.0001178 g/m
Now, we can find the cross-sectional area (A) using the density (ρ) and linear density (LD):
A = LD / ρ
A = 0.0001178 g/m / 1.3 g/cm³
To convert the units, we need to multiply by (100 cm / 1 m)³:
A = 0.0001178 g/m / 1.3 g/cm³ × (100 cm / 1 m)³ = 9.083 × 10⁻⁸ cm²
Finally, we can calculate the fiber equivalent diameter (D) using the formula for the area of a circle:
A = π(D/2)²
Rearrange for D:
D = 2 × √(A/π)
D = 2 × √(9.083 × 10⁻⁸ cm² / 3.1416) = 3.402 × 10⁻³ cm
Converting to micrometers (μm):
D = 3.402 × 10⁻³ cm × (10,000 μm / 1 cm) = 34.02 μm

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Answer:

Explanation:

Here, we want to get how the final digit in a measurement is obtained

Mathematically, the final digit can be obtained by estimation

Hence, we say that the value is uncertain

The final digit is obtained by a mark or between the last mark and the next mark in a measurement

Thus, we call this value uncertain since it is estimated

Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

As a result of the reaction between oxygen and methanethiol (CH_3SH), 25.8 grams of sulfur dioxide (SO_2) are produced, and the limiting reactant is oxygen (O2).

This is further explained below.

A process that results in the change of one set of chemical substances into another set of chemical substances is referred to as a chemical reaction.

Generally, the equation for the chemical reaction is mathematically given as

\(\mathrm{CH}_3 \mathrm{SH}(g)+3 \mathrm{O}_2(g)+2 \mathrm{H}_2 \mathrm{O}(g)+\mathrm{CO}_2(g)+\mathrm{SO}_2(g)\)

\(Number \ of \ moles = \frac{ Given \ mass}{Molecular \ mass}\)

moles of methanethiol=\(\frac{27.3}{48.11}\)

moles of methanethiol=0.56moles

moles of oxygen \(= \frac{32.01}{38.6}\)

moles of oxygen \(= 0.82 moles\)

Considering the response,

When one mole of CH_3SH interacts with three moles of O_2, one mole of SO_2 is produced.

As a result, 0.56 moles of CH_3SH undergo a reaction, which results in 0.56 moles of SO_2 being produced.

0.56 grams of SO_2 are created, which is equal to 35.86 grams.

moles of SO₂ \(= \frac{35.86}{ 64.06}\)

moles of SO₂  = 0.55 moles

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Substance C is a solid solute according to the solubility curve. So option B is correct.

Solubility is the maximum solubility that a solute can have in a 100 g solvent at a specific temperature. Solubility curves are plots of the temperature and the solubility value of a specific solute.

The curve of solubility is a curved line on a graph that indicates the relationship between temperature and solubility for a given substance at different temperatures. The graph of the relationship of solubility to temperature is called the Solubility curve. Most solubility curves are sigmoidal, meaning that the peak solubility occurs at the inflection point.

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Answer: It would have to be Diagram 4

Explanation: That is the only one that looks Ionized and you can hook up a picture of an Ionized Diagram online. That can also help with this question.

\(0.75x10^-4\)  in correct scientific notation is \(7.5 x 10^-5\).

To convert \(0.75x10^-4\)into correct scientific notation, we need to move the decimal point four places to the left, since the exponent is negative 4. This gives:

\(0.75 x 10^-4 = 0.000075\)

Now we can express this number in scientific notation by moving the decimal point four places to the right and adjusting the exponent accordingly:

\(0.000075 = 7.5 x 10^-5\)

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Answer:

No

Explanation:

Answer: smallest whole numbers are 2, 7, 4 and 6

Explanation: C2H6 + 3.5 O2. ⇒ 2. CO2 + 3 H2O

Answer:

True

Explanation:

they have the same number of protons but different number of neutrons which results in a different mass

I would greatly appreciate if you can give this the brainliest answer crown!

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass of object = 85 g

volume = 35.7 cm³

We have

\(density = \frac{85}{35.7} \\ = 2.380952...\)

We have the final answer as

Hope this helps you

At 400 K, the free energy change (ΔG) for the reaction is 53.0 kcal. The total cost of producing 5,000 units is $50,250.

To find ΔG at 400 K using the Gibbs-Helmholtz equation, we need to substitute the given values of ΔH and ΔS into the equation.

ΔG = ΔH - TΔS

Given;

ΔH = 61.0 kcal

ΔS = 0.020 kcal/K

T = 400 K

Substituting these values into the equation;

ΔG = 61.0 kcal - (400 K)(0.020 kcal/K)

ΔG = 61.0 kcal - 8.0 kcal

ΔG = 53.0 kcal

Therefore, at 400 K, the free energy change (ΔG) for the reaction is 53.0 kcal.

To find the total cost of producing 5,000 units using the cost equation y = 10x + 250, we need to substitute x = 5,000 into the equation.

y = 10x + 250

Given;

x = 5,000

Substituting x = 5,000 into the equation:

y = 10(5,000) + 250

y = 50,000 + 250

y = 50,250

Therefore, the total cost of producing 5,000 units is $50,250.

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1. The water inside a plant will not be able to come out.

2. It would kill the plants and species on Earth.

3. There would be no lakes, ocean, or water on land.

The inflation rate from 2014 to 2015, assuming 2014 as the base year, is 68.09%.

The inflation rate from 2014 to 2015, assuming that 2014 is the base year, can be determined using the Consumer Price Index (CPI). The CPI measures the cost of goods and services over time and is used to calculate inflation. The formula for calculating inflation rate using CPI is as follows: Inflation rate = ((CPI year 2 - CPI year 1) / CPI year 1) x 100To solve this problem, we first need to calculate the CPI for each year using the prices and quantities of nuts and meat.

Calculating CPI for 2014:CPI 2014 = (300 x $9) + (175 x $19) = $5,625 Calculating CPI for 2015:CPI 2015 = (420 x $9) + (340 x $14) = $9,460Using the CPI formula, we can calculate the inflation rate from 2014 to 2015:Inflation rate = ((CPI 2015 - CPI 2014) / CPI 2014) x 100= (($9,460 - $5,625) / $5,625) x 100= $3,835 / $5,625 x 100= 68.09% (to 2 decimal places) Therefore, the inflation rate from 2014 to 2015, assuming 2014 as the base year, is 68.09%.

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The half-life of a radioactive isotope is the amount of time it takes for half of the atoms in a sample to decay.

A radioactive isotope is an unstable form of an element that emits radiation as it decays. It is produced when a neutron is added to the nucleus of an atom, making it unstable and prone to radioactive decay. Radioactive isotopes are used in a variety of medical, scientific and industrial applications. In medicine, they are used to diagnose and treat diseases, while in industry they are used to detect flaws in materials. In scientific research, they are used to measure age and composition of materials.

Therefore, the half-life of this isotope is 12.75 years, since it takes 5.4 percent of the atoms in a sample to decay per year. This means that if we start with a sample of 100 atoms, after 12.75 years, only 50 atoms would remain in the sample. After 25.5 years, only 25 atoms would remain, and so on. This can be calculated by taking the natural log of 2 and dividing it by the decay rate of the isotope, which in this case is 5.4%.

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Answer:

C. Theories have been confirmed through tests; hypotheses haven't.

Hope this helps!!

A balanced equation obey the law of conservation of mass, the mass can neither be converted nor  be destroyed but can converted from one form to another. Here the given reaction indicates Haber process.

The ratio of the product of concentrations of the products to that of the reactants is also known as the concentration quotient and it is denoted as Q. At equilibrium Q becomes equal to the equilibrium constant.

The Haber process is:

N₂ + 3H₂ → 2NH₃

Q = [NH₃]² / [N₂] [H₂]³

Q = [0.0596]² / [0.600] [0.420]

Q = 0.014

Here Q is less than K, so the reaction proceeds in the forward direction.

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A. Fe3+. This is because Fe3+ has a higher charge than Ca2+ and Na+, which means it has a stronger attraction to the water molecules and therefore causes more disruption to the water's ability to vaporize.

Additionally, the concentration of Fe3+ ions would need to be much lower than Ca2+ and Na+ ions to have the same effect on the boiling point of water due to its higher charge.
The boiling point elevation depends on the number of ions present in the solution. In this case, if all ions have equal concentration, Fe3+ (A) will contribute most to elevating the boiling point of H₂O, because it has the highest charge and will produce more ions when dissolved in water.

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Answer:

Volume of the rock = 125 cubic centimetres

Explanation:

Given:

Water in beaker = 250 millilitres

Water in beaker after rock = 375 millilitres

Find:

Volume of the rock

Computation:

Volume of the rock = Water in beaker after rock - Water in beaker

Volume of the rock = 375 - 250

Volume of the rock = 125 millilitres

1 millilitres = 1 cubic centimetres

So,

Volume of the rock = 125 cubic centimetres

Answer:

The answer is 125 cubic meters

Explanation:

Because you subtract 375-250 and get 125

Answer=125

Answer:

3.798g of H₂O

Explanation:

In 1 mole of CuSO₄.4H₂O there are 4 molecules of water. The heat produce the releasing of 4 waters of hydration. To solve this question we need to convert the mass of CuSO₄.4H₂O to moles using its molecular mass (231.67g/mol). The moles of CuSO₄.4H₂O times 4 are the moles of water:

Moles CuSO₄.4H₂O:

12.21g CuSO₄ * (1mol / 231.67g) = 0.0527 moles

Moles H₂O:

0.0527 moles * 4 = 0.2108 moles of water

Mass (Molar mass H₂O = 18.015g/mol):

0.2108 mol * (18.015g / mol) =