Which of the following is true for a basic solution?A. The hydronium concentration is equal to zero.B. The hydronium concentration equal the the hydroxide concentration C. The hydronium concentration is less than hydroxide concentration,D. The hydronium concentration is greater than hydroxide concentration.

Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

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Answer:

A or B, but I think B would be the safer option.

Explanation:

In an ecosystem, the following chart of cows depicts cause or effect of the text structure.

An ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other by means of nutrient cycles and flow of energy.

Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the ecosystem .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.There are different types of ecosystems present.

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The number of moles of nitrogen, N in 65 moles of Pb(NO₃)₄ is 260 moles

We'll begin by obtaining the number of mole of N in one mole of Pb(NO₃)₄. Details below:

From the formula of Pb(NO₃)₄, we can see that there are 4 moles of N in 1 mole of Pb(NO₃)₄

With the above information, we can determine the number of mole of N in 65 moles of Pb(NO₃)₄. This is illustrated below:

1 mole of Pb(NO₃)₄ contains 4 moles of N

Therefore,

65 mole of Pb(NO₃)₄ will contain = (65 moles × 4 moles) / 1 mole = 260 moles of N

Thus, we can conclude from the above calculation that the number of mole of N is 260 moles

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Answer:

pH = 4

Explanation:

pH = -log[H⁺] = -log(10⁻⁴) = -(-4) = 4

When measuring heat transfer, the sign of the delta T (ΔT) and the heat transfer (q) values is significant.

The negative sign indicates that the heat flow is in the opposite direction from the expected direction based on the given temperature gradient. When a negative sign is present in the delta T value or heat value, it implies that heat is being absorbed rather than being given off.  For example, when a substance absorbs heat, the temperature difference between the two regions decreases, resulting in a negative delta T value. When the surroundings absorb heat, the object's temperature drops, resulting in a negative heat value. The opposite is true for positive signs. When an object loses heat, its temperature drops, and the temperature difference between two regions increases, resulting in a positive delta T value. The heat transfer is said to be positive if heat is given off by the system to the surroundings. When heat flows from the surroundings to the system, the heat transfer is negative. The negative sign is significant since it shows that the energy flow is in the opposite direction from the expected direction based on the given temperature gradient.The amount of heat transferred by the system is proportional to the absolute value of the heat value and the delta T value.

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Answer:

the Rhyniognatha hirsti

Explanation:

at age 400 million years old

Answer

0.8886 mol

Explanation

Given:

Mass of Ag₃N = 300 grams

What to find:

The number of moles present in 300 grams of Ag₃N.

Step-by=step solution:

From the Periodic Table; the 1 mole of Ag₃N has 337.61 g/mol

Therefore, the number of moles present in 300 grams Ag₃N can be calculated using the mole formula below:

The number of moles present in 300 grams of Ag₃N is 0.8886 mol.

Answer:

3.62

Explanation:

Using the Henderson-Hasselbach equation:

pH = pKa + log[base]/[acid]

pH = -log(1.8 x 10^-4) + log(0.15/0.20) = 3.62

The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14. Therefore, the pH of of the buffer solution comprised of 0.20 M HCHO₂ and 0.15 M NaCHO₂. (Ka for HCHO2 = 1.8 x 10⁻⁴) is 3.62. pH is a unitless quantity.

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7.

Using the Henderson-Hassel Bach equation:

pH = pKa + log[base]/[acid]

pH = -log(1.8 x 10^-4) + log(0.15/0.20) = 3.62

Therefore, the pH of of the buffer solution comprised of 0.20 M HCHO2 and 0.15 M NaCHO2. (Ka for HCHO2 = 1.8 x 10-4) is 3.62.

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hey sisterrrrrrrrrr its ginger charles here i hear you looking for the answer well this is your lucky day the answer is

Explanation:

The concentration of Bovine Hb with absorbance 0.7 at 570 nm has been 2.264 \(\mu\)M.

According to Beer's law, the absorbance of the sample can be given by:

Absorbance = Extinction coefficient \(\rm \times\) concentration \(\times\) path length

The Bovine Hb has the extinction coefficient = 30910 L/mol/cm

The absorbance = 0.7

The path length has been 1 cm.

The concentration of the Bovine Hb can be given as:

0.7 = 30910 \(\times\) concentration \(\times\) 1

The concentration of Bovine Hb = 2.264 \(\rm \times\;10^-^6\) moles/L

The concentration of Bovine Hb = 2.264 \(\rm \mu\)moles/L

The concentration of Bovine Hb = 2.264 \(\mu\)M.

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Answer:

B. Mixture

because air,sea water and alloy are example of Mixture

From the image attached;

Reaction 1 - Oxidation reduction

Reaction 2 - Precipitation reaction

Reaction 3 - Acid base reaction

Reaction 4 - Reaction with oxygen

A reaction is a procedure or an occurrence in which a change takes place, frequently leading to the conversion of one or more compounds into other substances. A chemical reaction, which entails the rupturing and creation of chemical bonds between atoms or molecules, is what is meant when the word "reaction" is used in reference to chemistry.

When reactant molecules collide with enough force and in the right orientation, the current chemical bonds are broken, and new bonds are formed, converting the reactants into products.

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Answer: 14.0

Explanation: 14.0 is a base. The more basic, the less hydrogen ion concentration.

Answer:

1.14 mol

Explanation:

The concept ideal gas law can be used here to determine the volume of the balloon. The volume of the balloon is 76.97 L.

The combination of Boyle's law, Charles's law and Avogadro's law leads to an equation which gives the combined effect of change of temperature and pressure on the volume of a gas.

According to Boyle's law, V ∝ 1/P

According to Charles's law, V ∝ T

According to Avogadro's law, V ∝ n

On combining all these equations, the ideal gas equation is given as:

PV = nRT

P - Pressure

V - Volume

n - Number of moles

R - Universal Gas constant

T - Temperature

Here the standard pressure is 1 atm

20°C = 20 + 273 = 293 K

V = nRT / P

3.2 × 0.0821 × 293 / 1

= 76.97 L

Thus the volume of balloon is 76.97 L.

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Answer: ITS C OR B I THINK BUT I HAVE A FEELING ITS ONE OF THOSE

Explanation:

IM SO SORRY IF ITS WRONG KSDBDZDH

Answer:

C. Patterns

Explanation:

I got it right on usatestprep

its True

Yes, burning of wood is an example of oxidation-reduction reaction.

hope it helps

Hello !

Gobar gas mainly contains methane.

It is mainly a mixture of mainly methane and carbon dioxide. Methane is a major component of biogas.

Answer:

Explanation: Liquid Chromatography  

I'm sorry if i'm wrong

We frequently observe kids playing with polythene bags filled with water that have little holes drilled into them at various locations so they can sprinkle water on other kids. Through this experiment, we can say that pressure acts in all directions in liquids.

Since both liquids and gases may flow, they are both referred to as fluids. Fluids under rest pressure behave uniformly in all directions.

Weather forecasts can be made using barometers. They track the evolution of atmospheric pressure throughout time.

On weather forecast maps, pressure variations appear as an isobar pattern. Predictions are made using these changes in pressure, and they are fairly accurate when combined with wind observations.

As you go away from a liquid's surface, pressure rises. for instance: A bucket has three holes that are all the same size. Since there is more pressure at the bucket's bottom, the water spills out more forcefully. Dams are thicker at the bottom for this reason.

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The value of Kc for the given reaction is 0.0579 (rounded to four decimal places).

The formula for the equilibrium constant, Kc, of a reaction is given by the ratio of the product of the concentrations of the products raised to their respective stoichiometric coefficients to the product of the concentrations of the reactants raised to their respective stoichiometric coefficients.

The stoichiometric coefficients are the coefficients in the balanced chemical equation.

To determine the value of Kc for the reaction given by the following chemical equation:N2(g) + 3 H2(g) ⇌ 2 NH3(g)

we first need to write the expression for Kc.

The expression for Kc is given by the following formula:Kc = [NH3]² / [N2][H2]³.

We are given the equilibrium concentrations as follows:[N2]eq = 2.66 M[H2]eq = 0.64 M[NH3]eq = 3.34 M

We can substitute these values into the expression for Kc and obtain the following:Kc = (3.34)² / (2.66)(0.64)³ = 0.0579 (rounded to four decimal places).

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To calculate the pH of a solution of NaOH (sodium hydroxide), we need to consider that NaOH is a strong base that dissociates completely in water, producing hydroxide ions (OH⁻).

Given:

Concentration of NaOH = 0.005 M

Since NaOH dissociates into one hydroxide ion (OH⁻) per molecule, we can determine the concentration of hydroxide ions in the solution, which will allow us to calculate the pOH. Then, we can convert the pOH to pH using the relationship: pH + pOH = 14.

1. Calculate the concentration of hydroxide ions (OH⁻):

The concentration of OH⁻ ions will be the same as the concentration of NaOH since NaOH dissociates completely.

Concentration of OH⁻ = 0.005 M

2. Calculate the pOH:

pOH = -log[OH⁻]

pOH = -log(0.005)

Using logarithm properties, we can determine the pOH value:

pOH = -log(0.005)

pOH = -(-2.301)

pOH = 2.301

3. Calculate the pH:

pH = 14 - pOH

pH = 14 - 2.301

pH ≈ 11.699

Therefore, the pH of a 0.005 M NaOH solution is approximately 11.699.

The pH of a 0.005 M concentration of NaOH ( sodium hydroxide ) solution is approximately 11.70.

The pH of a solution is defined as the logarithm of the reciprocal of the hydrogen ion concentration  [H+] of the given solution.

From the formula;

pH = -log[ H⁺ ]

pOH = -log[ OH⁻ ]

pH + pOH = 14

Given that; the concentration of solution (molarity) ( OH⁻ ) is 0.005 M.

First, we determine the pOH.

pOH = -log[ OH⁻ ]

Plug in ( OH⁻ ) = 0.005

pOH = -log[ 0.005 ]

pOH = 2.30

Now, plug pOH = 2.30 into the above formula and solve for the pH:

pH + pOH = 14

pH + 2.30 = 14

Subtract 2.30 from both sides:

pH + 2.30 - 2.30 = 14 - 2.30

pH = 14 - 2.30

pH = 11.7

Therefore, the pH of the solution is 11.7.

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Dinitrogen trioxide

From the given question, we are to name the compound N2O3. From the given compound, you can see that there are 3 atoms of oxygen and 2 atoms of hydrogen.

Hence the name of the given compound is Dinitrogen trioxide

Answer:

8 neutrons

A is the number of neutrons plus protons in the nucleus. However, we already know that there are 7 protons. Therefore, there must be 8 neutrons in the nucleus to add up to 15. Table 3.

Element Symbol Number of Neutrons

carbon 146C 8

nitrogen 147N 7

157N 8

oxygen 168O 8

Explanation:

200.98grams

The balanced chemical reaction between Lithium and nitrogen is given as:

Given the following parameter

Mass of Li3N = 500grams

Determine the moles of Li3N

Based on stoichiometry, 1 mole of nitrogen produced 2 moles lithium nitride. The moles of nitrogen required will be:

Determine the mass of nitrogen that reacted

Hence the mass of nitrogen that has reacted if 500g of Li3N was produced is 200.98grams

To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.

To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.

If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).

However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.

In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.

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The volume of hydrogen gas produced in the reaction of 73 grams of zinc and 73 grams of hydrochloric acid (under normal conditions) is approximately 22.4 liters.

To calculate the volume of hydrogen gas produced in the reaction of zinc and hydrochloric acid, we need to use the principles of stoichiometry and the ideal gas law.

First, let's write the balanced chemical equation for the reaction between zinc (Zn) and hydrochloric acid (HCl):

Zn + 2HCl →\(ZnCl_2\)+ H2

From the equation, we can see that one mole of zinc reacts with two moles of hydrochloric acid to produce one mole of hydrogen gas. To determine the number of moles of zinc and hydrochloric acid, we need to convert the given masses into moles.

The molar mass of zinc (Zn) is approximately 65.38 g/mol, so 73 grams of zinc is equal to:

73 g Zn * (1 mol Zn / 65.38 g Zn) ≈ 1.116 mol Zn

Similarly, the molar mass of hydrochloric acid (HCl) is approximately 36.46 g/mol, so 73 grams of HCl is equal to:

73 g HCl * (1 mol HCl / 36.46 g HCl) ≈ 2.002 mol HCl

According to the balanced equation, the reaction produces one mole of hydrogen gas for every two moles of hydrochloric acid. Therefore, since we have 2.002 moles of HCl, we expect to produce half that amount, or approximately 1.001 moles of hydrogen gas.

To calculate the volume of hydrogen gas, we can use the ideal gas law, which states:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. In this case, we assume the reaction is conducted under normal conditions, which means a pressure of 1 atmosphere and a temperature of 273.15 Kelvin.

Rearranging the equation to solve for V, we have:

V = nRT / P

Substituting the values, we get:

V = (1.001 mol) * (0.0821 L·atm/(mol·K)) * (273.15 K) / (1 atm) ≈ 22.4 L

Therefore, the volume of hydrogen gas produced in the reaction is approximately 22.4 liters.

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1. What holds the solar system together

gravity

2. What is the name of the giant Explosion that formed the universe

the Big Bang

3. As the universe spread out , what kind of gas was formed first

hydrogen gas

4. What was formed from the flat outer disk of our solar system

a solar nebula

5. What is the name for the star that has used up all it's fuel and is cool?

red giant

Im really sorry if it's incorrect

Hope it's help have a nice day!

Answer:

the answer is cr

Explanation:

just did this test in chemistry the answe cr as in chromium, xoxo live stream positions by ariana btw

The number of moles of calcium chloride in 250 ml of a 9.0M of solution is 2.25 moles.

The amount of moles in a substance can be calculated by multiplying the molarity of the solution by the volume as follows;

no of moles = molarity × volume

According to this question, 250mL of a calcium chloride solution has a molarity of 9M. The number of moles can be calculated as follows:

no of moles = 9.0M × 0.250L

no of moles = 2.25 moles

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Explanation:

The correct formula for calcium fluoride is CaF2 (with two fluoride ions per calcium ion). Therefore, 2.25 moles of CaF2 contains:

- 2.25 moles of Ca2+ ions (since there is one calcium ion for every molecule of CaF2)

- 2 x 2.25 = 4.50 moles of F- ions (since there are two fluoride ions for every molecule of CaF2)

So, in total, 2.25 moles of CaF2 contains 2.25 moles of Ca2+ ions and 4.50 moles of F- ions.

Answer: hey i hope this image helps answer your question :)

Explanation:

:)