What is the pH of a 0.29 M nitric acid(HNO3) solution?a. 0.54b. 2.90c. 2.43d. 13.46e. none of these

Answer:

20

Explanation:

The acceleration in this problem is 20

Acceleration is defined as the rate of change of velocity with time. When a force is exerted on a body and the net force is greater than zero, it begins to accelerate.

The total cooling performed by the coil is 29168.21 BTU/Hr and the sensible cooling performed by the coil is 1209.93 BTU/Hr.

Inlet Condition: TDB, in = 84 °F and TWB, in = 72 "F

Outlet Condition: TDB,

out = 55 F and TDP out = 50 'F

Flow Rate: CFM of air = 3000

Standard Density of Air = 0.075 lbm/ft³

Specific Heat of Air = 0.24 BTU/lbm-'F.

The total cooling performed by the coil can be calculated using the following formula;

Sensible Cooling = CFM x Density x Specific Heat x (TDB, in - TDB, out)

Latent Cooling = CFM x Density x (HFG x (W, in - W, out)

Total Cooling = Sensible Cooling + Latent Cooling

First, we need to calculate the density of air at the inlet condition and outlet condition using the formula:

Density = 0.075 x (460 + TDB) / (460 + TWB)  at inlet and outlet condition

Density at inlet condition = 0.075 x (460 + 84) / (460 + 72)Density at inlet condition = 0.0666 lbm/ft³

Density at outlet condition = 0.075 x (460 + 55) / (460 + 50)Density at outlet condition = 0.068 lbm/ft³

The sensible cooling performed by the coil is;

Sensible Cooling = CFM x Density x Specific Heat x (TDB, in - TDB, out)

Sensible Cooling = 3000 x 0.0666 x 0.24 x (84 - 55)

Sensible Cooling = 1209.93 BTU/Hr

The total cooling performed by the coil is;

Total Cooling = Sensible Cooling + Latent Cooling

Here, Latent Cooling = CFM x Density x (HFG x (W, in - W, out))

At the inlet condition; W, in = (0.62198 x PWS) / (PB - PWS)W,

in = (0.62198 x 0.6237) / (14.433 - 0.6237)W,

in = 0.0427

At the outlet condition; W, out = (0.62198 x PWS) / (PB - PWS)W,

out = (0.62198 x 0.315) / (14.266 - 0.315)W,

out = 0.0237

HFG at average of inlet and outlet air temperature = 1074 BTU/lbm

Latent Cooling = CFM x Density x (HFG x (W, in - W, out))

Latent Cooling = 3000 x 0.0666 x (1074 x (0.0427 - 0.0237))

Latent Cooling = 27958.28 BTU/Hr

Therefore, Total Cooling = Sensible Cooling + Latent Cooling

Total Cooling = 1209.93 + 27958.28

Total Cooling = 29168.21 BTU/Hr

Therefore, the total cooling performed by the coil is 29168.21 BTU/Hr and the sensible cooling performed by the coil is 1209.93 BTU/Hr.

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The odd one among the options listed is golf because it is not an element (option D).

Chemical elements in chemistry are one of the simplest chemical substances that cannot be decomposed in a chemical reaction.

Chemical elements consist of atoms which have the same number of protons. The chemical elements are arranged on the periodic table in accordance with their atomic numbers.

There are a total number of 118 chemical elements in nature. The periodic table uses abbreviated chemical symbols in place of full element names, for example, Copper is symbolized using Cu while pottasium is symbolized using K.

Golf is a ball game played by individuals competing against one another in which the object is to hit a ball into each of a series of (usually 18 or nine) holes in the minimum number of strokes.

Golf is a sport, hence, is the odd one among the other options which are chemical elements.

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Considering the definition of STP conditions, a mass of 20.10 grams of chlorine gas is found in a 12.7 L sample at STP.

STP conditions refer to standard temperature and pressure, using 1 atmosphere and 0 °C as reference values for gases. Under these conditions, 1 mole of any gas occupies an approximate volume of 22.4 liters.

The molar mass of substance is the amount of mass that a substance contains in one mole.

In this case, you can apply the following rule of three: if by definition of STP conditions 22.4 liters of chlorine is occupied by 1 mole of chlorine, 12.7 liters is occupied by how many moles of chlorine?

moles= (12.7 liters× 1 mole)÷ 22.4 liters

moles= 0.567 moles

The molar mass of chlorine is 35.45 g/mole.

Now,  you can apply the following rule of three: If by definition of molar mass 1 mole of chlorine has a mass of 35.45 grams, 0.567 moles of chlorine has how much mass?

mass= (0.567 moles× 35.45 grams)÷ 1 mole

mass= 20.10 grams

Finally, a mass of 20.10 grams of chlorine gas is present.

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The amount of calcium ingested by drinking eight 8-oz glasses of local water is 0.0041655 mol. By drinking 1.0L of local water, approximately 166.85 mg of calcium is ingested, which is 14.5% of the daily requirement of calcium.

1. To calculate the amount of calcium ingested by drinking eight 8-oz glasses of local water, we need to know the volume of water and the concentration of calcium ions present in it.1 oz = 29.57mL

So, eight 8-oz glasses of water = 8 x 8 oz = 64 oz= 64 x 29.57 mL = 1892.48 mL1 L = 1000 mL

Therefore, the volume of water in liters = 1892.48/1000 = 1.8925 L

Concentration of Ca ions in water = 0.0022 mol/L

So, the amount of calcium ingested = concentration of calcium x volume of water= 0.0022 mol/L x 1.8925 L= 0.0041655 mol of calcium

2. To calculate the percentage of the daily requirement of calcium met by drinking 1.0L of local water, we need to convert the amount of calcium in moles to milligrams (mg). The molar mass of calcium is 40.08 g/mol.0.0041655 mol of calcium weighs = 0.0041655 mol x 40.08 g/mol = 0.16685464 g or 166.85 mg

The percentage of the daily requirement of calcium met by drinking 1.0L of local water is given by the formula:

Percentage of daily requirement met = (amount of calcium in water/daily requirement of calcium) x 100%Daily requirement of calcium = 1150 mg

Percentage of daily requirement met = (166.85 mg/1150 mg) x 100%≈ 14.5 %

Therefore, by drinking 1.0L of local water, approximately 166.85 mg of calcium is ingested, which is 14.5% of the daily requirement of calcium.

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The Le Chatelier principle explains how an equilibrium changes when its conditions change. For variations in concentrations, temperature, or pressure, the shift's direction can be predicted. Although catalysts speed up the process of reactions reaching equilibrium, they do not change the location of an equilibrium.

The equilibrium will change to create more products if the concentration of the reactants (quantity of reactants) rises (product-favored). The reaction will change to produce additional reactants as the number of products rises (reactant-favored). Reactants benefit from a decrease in reactants. Products benefit from decreasing product. A system may gain temperature from the environment or as a result of a chemical interaction. The equilibrium moves to the right as the temperature drops (products). In other words, the system favors the reaction that produces heat to make up for the drop in temperature.

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Answer:

There is 5.56 g of gold for every 1 g of chlorine

Explanation:

The question is to determine the simplest mass ratio of gold to Chlorine in the compound.

Since the mass of gold in the compound compared to chlorine is 15.39 g for every 2.77 g, the mass of gold per gram of chlorine is given as:

15.39 / 2.77 = 5.56 g of gold to two decimal places

Therefore, for every 5.56 g of gold, there is 1 g of chlorine.

Note : The ratio in which different elements combine by mass to form a compound is given by the law of constant composition which states that, "all pure samples of a particular chemical compound contain the same elements combined in the same proportion by mass.

The amount of the 240 g sample of the radioisotope that will remain after 525 billion years is 7.5 g

n = t / t½

n = 525 / 105

n = 5

N = N₀ / 2ⁿ

N = 240 / 2⁵

N = 240 / 32

N = 7.5 g

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Answer:

7.5

Explanation:

edge

Depending on how the changed amino acid performs in the body. A protein's ability to function may be completely lost if another amino acid is substituted, where as substituting one may have no discernible impact.

The fundamental molecule used to create proteins is known as an amino acid. Twenty distinct amino acids are available. A gene encodes the sequence of one or more chains of amino acids (known as polypeptides) that make up a protein. While some amino acids (called essential amino acids) can be produced by the body, others (called non-essential amino acids) cannot and must be received through diet. In marketing for food products, the phrase "amino acid" has crept into everyday speech. Some foods, like eggs or quinoa, have been listed as having "large levels of amino acids." And from this point on, you will recognize those labels as referring to a crucial protein component that is functional rather than static.

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Answer:

5

Explanation:

When reading the label on a reagent container, the three most important pieces of information include:

This is referred to a chemical which is added to a mixture thereby resulting in a chemical reaction occurring and have different properties which is why the label has to contain their features.

It is therefore best to check the label for properties such as name and concentration so as to enable individuals use it for the right type of reactions and is also important in prevention of the risk of accident by individuals.

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Answer:

A.) Speed up

Explanation:

Heat is directly proportional to kinetic energy which happens when the particles are moving very quickly. This means that more speed = more heat.

Answer:

A

Explanation:

With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion. ... With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly.

Answer:

A

Explanation:

Lighting a fireworks the potential energy is converted to all forms of energy like light, heat and sound energy

The energy is required to remove a proton from ¹⁵N₇ is

The reaction to remove the proton is given as follows :

¹⁵N₇  ---->   ¹⁴C₆  +  H

The mass of ¹⁵N₇   =  15.000109

the mass of ¹⁴C₆ = 14.003242

The mass of H = 1.007825

The energy requires to remove a proton is given as:

E = ( 14.003242 + 1.007825 - 15.000109) u

E = 0.010958 × 9312.5 MeV

E = 10.2046375 MeV

Thus, energy is required to remove a proton from ¹⁵N₇ with  the masses of the atoms ¹⁵N₇ , ¹⁴C₆ and H are 15.000109 u , 14.003242 u and 1.007825 u , respectively is 10.2046375 MeV.

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The nonrenewable energy source among the options provided is fossil fuel energy, option C is correct.

Fossil fuels, such as coal, oil, and natural gas, are derived from ancient organic matter that has been buried and transformed over millions of years. These resources are finite and cannot be replenished within a human lifespan. Additionally, their combustion releases carbon dioxide and other greenhouse gases, contributing to climate change and air pollution.

Solar energy, wind energy, tidal energy, and geothermal energy are renewable sources of energy. They rely on naturally replenishing resources like sunlight, wind, tides, and heat from the Earth's core, making them sustainable and environmentally friendly alternatives to fossil fuels, option C is correct.

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The complete question is:

Which of the following energy sources is considered nonrenewable?

A. solar energy

B. wind energy

C. fossil fuel energy

D. tidal energy

E. geothermal energy

The equilibrium constant of a reaction requires certain environmental variables to remain constant. These variables are pressure, temperature, and concentration. The correct option is A.

An equilibrium constant is a mathematical tool that enables the quantification of the extent of a chemical reaction. The equilibrium constant is symbolized by Keq, and it is utilized to determine the concentration of reactants and products present at equilibrium.

                           This calculation is done using the law of mass action.Keq is defined as the ratio of product concentrations to reactant concentrations in a chemical reaction taking place at equilibrium. The concentrations used in the expression for Keq are equilibrium concentrations.

                                 As a result, Keq is a constant for a given reaction at a specific temperature. Keq is dependent on a variety of environmental variables such as temperature, pressure, and concentration. To keep the equilibrium constant stable, these variables must remain constant.

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Answer:

0.694 cents per second

Explanation:

25x100=2500 cents per hour, 2500/60 = 41.67 per minute and 41.67/60=0.694 cents per second

The phrase "Lack of conversation" does not belong according to Jean Piaget's theory of cognitive development.

"Lack of object permanence" refers to the inability to understand that objects continue to exist even when they are out of sight, which is a characteristic of the sensorimotor stage (the first stage) of cognitive development.

"Sensorimotor" refers to the stage of cognitive development where infants and toddlers learn about the world through their senses and motor actions, which is when they develop the concept of object permanence.

"Lack of conversation", on the other hand, is not related to Piaget's theory of cognitive development, and is not a common term used in developmental psychology.

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Answer:

Arkham

Explanation:

don't ok

The diameter of a ground-state hydrogen atom can be calculated using the Bohr radius (a0) which is approximately equal to 0.529 Å (angstroms) and the formula for the diameter of a sphere (2 × radius).

So for the ground-state hydrogen atom (n = 1), the radius (r) would be :

\(r = a0 / 1\)

= a0 The diameter of a sphere is 2 times the radius so the diameter of a ground-state hydrogen atom can be expressed as follows:

Diameter = 2 × radius

Diameter = 2 × a0

Diameter = 2 × 0.529.

Diameter = 1.058 Å

Therefore, the diameter of a ground-state hydrogen atom is approximately 1.058 angstroms. This process has significant applications in the food and beverage industry as well as in the production of biofuels.

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Answer:

about 12 cm

Explanation:

Considering the frequency of 2,450 MHz, the wavelength of microwave oven radiation is about 12 cm and the quantum energy of a microwave photon is about 1 x 10-5 eV.

the balanced equation for the reaction is as follows:IO3− + AsO33− + 4H+ → I− + AsO43− + H2O.

The given equation is as follows:IO3− + AsO33− → I− + AsO43− (acidic solution)

When we balance the given equation, we get:IO3− + AsO33− → I− + AsO43−(a) Balancing the As atoms on both sides of the equation: The equation contains one As atom on each side.

balanced equation:IO3− + AsO33− → I− + AsO43−(b) Balancing the I atoms on both sides of the equation:

There is only one I atom on each side. balanced equation:IO3− + AsO33− → I− + AsO43−(c) Balancing the O atoms on both sides of the equation:

There are 9 O atoms on the left-hand side and 10 on the right-hand side.

To balance this, we add 1 water molecule to the left-hand side. balanced equation:IO3− + AsO33− + H2O → I− + AsO43−(d) Balancing the H atoms on both sides of the equation:

There are 6 H atoms on the right-hand side and only 2 on the left-hand side.

To balance this, we add 4 H+ ions to the left-hand side. balanced equation:IO3− + AsO33− + 4H+ → I− + AsO43− + H2O

Therefore, the balanced equation for the reaction is as follows:IO3− + AsO33− + 4H+ → I− + AsO43− + H2O.

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Methanol burns with a standard enthalpy of -715 kJ/g.

The amount of heat released or absorbed during a reaction that takes place under constant pressure is referred to as the enthalpy change. It is given the sign H, which can be read as "delta H".

to determine the enthalpy change

To solve, use the formula H = m x s x T.

You are ready to determine the enthalpy of reaction once you have m, the mass of your reactants, s, the specific heat of your product, and T, the temperature change from your reaction. To solve, just enter your values into the formula H = m x s x T and multiply.

According to the equation, methanol is completely burned.

: 2CH₃OH + 3O₂ → 2CO₂ + 4H₂O.

The reaction enthalpy is −715 kJ/mol.

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Answer:

1 gold(III), 3 fluoride

Explanation:

Iodine ions are oxidized to form iodine when the chlorine gas is bubbled in the solution of potassium iodide.

When chlorine gas is bubbled into a solution of potassium iodide, some amount of the iodide ions are oxidized and changed into iodine which leads to the formation of beautiful violet color of iodine. This colour can be seen as the iodine dissolves in the carbon tetrachloride layer.

While on the other hand, when the high concentration of chlorine is bubbled into the solution of potassium iodide, the iodine reacts and formed iodine monochloride which is ruby red so we can conclude that iodine ions are oxidized to form iodine when the chlorine gas is bubbled in the solution of potassium iodide.

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The energy separation of the levels in responsible for the emission is  0.0563 kJ/mol, 0.0563 kJ/mol, 2.105 eV.

E = (hc)/λ

Where h is Planck’s constant, c is the speed of light, λ is the wavelength of the emitted radiation.

Substitute the values in the above formula:

Planck's constant, h = 6.626 × \(10^-^3^4\)J·s

Speed of light, c = 2.998 × \(10^8\) m/s

Wavelength,λ = 590 nm = 590 ×\(10^-^9\) m

E = (6.626 ×\(10^-^3^4\)J·s × 2.998 × 10^8 m/s)/590 × \(10^-^9\)m

E = 3.376 × \(10^-^1^9\) J

Hence, the energy separation of the levels in responsible for the emission is 3.376 × \(10^-^1^9\)J (Joules).

To calculate the energy separation of the levels in kJ/mol, we need to convert Joules into kJ/mol. We know that 1 J = 0.001 kJ and 1 mol = 6.022 × 10^23 particles.

So,3.376 ×\(10^-^1^9\)J = (3.376 ×\(10^-^1^9\)J / 6.022 ×\(10^2^3\)) × (6.022 × \(10^2^3\))

Therefore, 3.376 × \(10^-^1^9\) J = 0.0563 kJ/mol.

Hence, the energy separation of the levels in responsible for the emission is 0.0563 kJ/mol.

To calculate the energy separation of the levels in eV, we need to convert Joules into eV.

We know that 1 J = 6.242 × \(10^1^8\) eV.

So,3.376 × \(10^-^1^9\) J = 3.376 × \(10^-^1^9\) J × (6.242 ×\(10^1^8\) eV/1 J)

Therefore, 3.376 ×\(10^-^1^9\)J = 2.105 eV.

Hence, The energy separation of the levels in responsible for the emission is  0.0563 kJ/mol, 0.0563 kJ/mol, 2.105 eV.

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the 1st one is balanced, the 2nd isn't (the number of Mg differs from left 1 to right 2).

The third is also not balanced, 2 F left,2*3=6 on the right

Answer:

there will a definite decrease in solute solution

Explanation:

acid reaction acting upon negative charge.

Answer:

When making ice cream, you're using physical changes. When you shake your bag, you're freezing the milk, which means the water in it is turning from a liquid (water) into a solid (ice).