how many grams of nacl are contained in the solution discussed in problem

Answer:

1. The vernal equinox

- happens around March 21st

- has days and nights of equal length

2. In the southern hemisphere, the longest day happens during

- June

3. During the winter in the northern hemisphere

- the days are shorter than during summer

Answer:

1)the vernal equinox happens around March 21st

2)in the southern hemisphere the longest day of the year happens during december

3)The days are shorter then during the summer.

Explanation:

The cart's gravitational potential energy is 1236.6 J. The nucleus of radioactive substances is unstable due to an imbalance between the number of protons and neutrons.

This imbalance makes the nucleus unstable and causes it to decay.5.6. Alpha particles consist of the largest particles. Alpha particles contain two protons and two neutrons and have a relatively large mass. Because of their large size and positive charge, alpha particles can't penetrate far into matter, and they're easily stopped by a sheet of paper or a few centimeters of air.5.7. Gamma rays are not affected by an electric field.

This is because they have no charge and no mass. Gamma rays are a type of electromagnetic radiation with a high frequency and short wavelength that can penetrate a variety of materials.6.1. Spring balance measures force by using Hooke's law, while a balance scale measures mass by comparing two weights. Examples of pushing forces: The engine of a car applies a force to move the car forward, and a person pushing a trolley.

Examples of pulling forces: A horse pulling a cart, and a person pulling a cart.6.2. When the gradient is a straight line, a force-extension graph indicates that the spring is elastic.6.4. In order to determine the resultant force, we must first calculate the net force by adding the forces acting in the same direction and subtracting those acting in the opposite direction. In this case, the resultant force is (5 - 8 - 11 + 4 + 6) N = -4 N. This negative sign indicates that the resultant force is acting in the opposite direction to the initial forces.6.5.

To calculate the resultant force, we must first add the forces acting in the same direction and subtract those acting in the opposite direction. In this case, the resultant force is (-5 + 7 + 66 - 58 - 12) N = -2 N. This negative sign indicates that the resultant force is acting in the opposite direction to the initial forces.6.6. The gravitational potential energy of a cart at the top of a 300 m hill can be calculated using the formula:

GPE = mghwhere m is the mass of the cart, g is the acceleration due to gravity, and h is the height of the hill.

GPE = 0.420 kg × 9.8 m/s² × 300 m

= 1236.6 J

Therefore, the cart's gravitational potential energy is 1236.6 J.

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The compound as shown  corresponds to the compound 1-ethyne.

The term hydrocarbon refers to a compound that is composed of only hydrogen and carbon. A hydrocarbon may be an alkane, alkene, alkyne or aromatic compound.

Looking at the structure of the compound as shown, the structure corresponds to the compound 1-ethyne.

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Answer:

D.

Explanation:

I took the test

radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays. Your mind interprets the energies of light as different colors, from red to violet.

The correct way to set up the relationship between milligrams and grams is 1mg-10-³g. option D is correct.

The milligrams and grams are is eual to the 1g = 1,000mg. 1,000 milligrams (mg) in 1 gram (g).

The conversion of  your gram figure to milligrams multiply your figure by 1000.  1mg is 1/1000g. There are 1,000 milligrams in 1 gram.

Therefore, The correct way to set up the relationship between milligrams and grams is 1mg-10-³g. option D is correct.

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Answer:

the correct choice would be: 4. Reaction rates are not related to spontaneity.

Explanation:

The speed of reaction is independent of spontaneity, since it depends on other factors such as the amount of reagent.

The amount of reagent is one of the variables that most influences the speed of reaction, the greater the amount of reagent, the faster the reaction will be and thus the speed will be increased.

The correct answer is: D. All of the above.

In the chemical reaction 2Al(s) + 3Pt(NO3)2(aq) -> 3Pt(s) + 2Al(NO3)3(aq), we can determine the role of Al(s) by examining the changes in oxidation states.

The reducing agent: A reducing agent is a substance that undergoes oxidation, meaning it loses electrons, and causes the reduction of another species by donating electrons. In this reaction, Al(s) is oxidized from an oxidation state of 0 to +3 in Al(NO3)3(aq). Therefore, Al(s) is not the reducing agent.

The electron donor: An electron donor is a substance that donates electrons to another species. In this reaction, Al(s) donates electrons to Pt(NO3)2(aq), resulting in the reduction of Pt(II) ions to Pt(s). Therefore, Al(s) acts as the electron donor.

Being oxidized: When a substance undergoes oxidation, it loses electrons and increases its oxidation state. In this reaction, Al(s) is oxidized from an oxidation state of 0 to +3 in Al(NO3)3(aq). Therefore, Al(s) is being oxidized.

From the analysis above, we can conclude that the correct answer is:

D. All of the above

Al(s) is the electron donor, it undergoes oxidation and loses electrons, and therefore acts as the reducing agent in this chemical reaction. It is important to note that in redox reactions, the species that is oxidized is the reducing agent, and the species that is reduced is the oxidizing agent.

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Answer:

yes

Explanation:

Answer:

Alpha is the most harmful, Gamma is the least harmful.

Explanation:

From skimming over your answer I have noticed this mistake. You are correct in saying alpha is the least penetrating but incorrect in saying alpha is the least ionising. Same for Gamma.

Answer:

calcium chloride oxide

Answer:

He did not multiply the chlorine and oxygen atoms by the coefficient 4

Explanation:

I just took the quiz

The pH of the solution made by mixing 93 mL of 0.010 M HClO4, 41 mL of 0.040 M HCl, and 866 mL of water is 2.59

To solve this problem, we need to first determine the total amount of H+ ions in the solution, which will allow us to calculate the pH.

Calculate the amount of H+ ions from HClO4:

Amount of H+ ions from HClO4 = (93 mL) * (0.010 mol/L) = 0.93 mmol

Calculate the amount of H+ ions from HCl:

Amount of H+ ions from HCl = (41 mL) * (0.040 mol/L) = 1.64 mmol

Calculate the total amount of H+ ions in the solution:

Total amount of H+ ions = 0.93 mmol + 1.64 mmol = 2.57 mmol

Calculate the molarity of the H+ ions in the solution:

Total volume of solution = 93 mL + 41 mL + 866 mL = 1000 mL = 1 L

Molarity of H+ ions = (2.57 mmol) / (1 L) = 2.57 mM

Calculate the pH of the solution:

pH = -log[H+]

pH =\(-log(2.57 x 10^-3)\)

pH = 2.59

Therefore, the pH of the solution made by mixing 93 mL of 0.010 M HClO4, 41 mL of 0.040 M HCl, and 866 mL of water is 2.59.

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The polarity of 6 real molecules are given below,

O2- Neutral

HF- Acidic

H2O- Neutral

NH3- Basic

CF4-Nonpolar

CH3F-  Polar

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A photosynthetic reaction is the formation of the glucose and oxygen molecule by water and carbon dioxide. 12 moles of water will be used in the reaction.

Moles are the ratio of the mass of the substance to the molar mass of the substance.

In the photosynthetic reaction, 6 moles of carbon dioxide and 6 moles of water are utilized to produce 1 mole of a glucose molecule and 6 moles of oxygen.

From this, it can be said that the number of moles consumed of carbon dioxide and water will be equal and in the ratio of 1:1.

The number of moles of carbon dioxide will be equal to that of the water molecule and will also be equal to the ratio of the mass of carbon dioxide to the molar mass of carbon dioxide.

The moles of water will be calculated as:

\(\begin{aligned}\rm moles &= \rm \dfrac{\text{mass of CO}_{2}}{\text{molar mass of CO}_{2}}\\\\&= \dfrac{528}{44.01}\\\\&= 12\;\rm moles\end{aligned}\)

Therefore, option A. 12 moles of water will be used.

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Answer:

  ≈ 0.6579 atm

Explanation:

The pressure in atmospheres is the ratio of the pressure on the mountain to one atmosphere, in corresponding units.

The pressure is ...

  500 /760 atm = 25/38 atm ≈ 0.6579 atm

Socialization is the process in  which children learn the rules and the behavior expected of them by the society.

Socialization is a lifelong process of learning cultural norms, values, beliefs, and customs that are necessary for functioning within a society. During this process, children acquire the skills and knowledge needed to interact with others and adapt to the social environment around them.

The process of socialization begins in early childhood and continues throughout an individual's life. It involves various agents of socialization, such as family, peers, schools, media, and religion. Family is considered the primary agent of socialization, as it provides the first and most lasting influence on a child's behavior and personality.

Peers and schools also play a significant role in shaping a child's behavior and social skills, while media and religion may provide additional sources of influence.

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The question requires us to calculate the mass, in grams, contained in 5.26 x 10^-4 mol of HC2H3O2.

To solve this question, first we need to calculate the molar mass of the compound, considering the number of atoms of each element, and then relate the value obtained with the number of moles given (5.26 x 10^-4 mol).

First, to calculate the molar mass of the compound, let's consider the following atomic masses:

atomic mass of C = 12.01 u

atomic mass of H = 1.007 u

atomic mass of O = 15.99 u

Next, we calculate the molar mass. To do that, we need to consider the number of atoms of each element: according to the chemical formula, there are 2 atoms of C, 4 atoms of H and 2 atoms of O:

molar mass (C2H4O2) = (2 * 12.01) + (4 * 1.007) + (2 * 15.99) = 60.03 g/mol

Now, we know that there are 60.03 g for each mol of the compound. With that information, we can estabilish the following relation to calculate the mass contained in 5.26 x 10^-4 mol of the compound:

1 mol --------------------- 60.03 g

5.26 x 10^-4 mol ----- x

Solving for x, we have:

Therefore, there are 0.03158 g of HC2H3O2 in 5.26 x 10^-4 mol of this compound.

Based on the analysis, none of the given changes (a, b, c, d) would cause the cell potential to increase (become more positive). The cell potential is determined by the standard cell potential (E°cell) and the concentrations of the species involved in the half-reactions.

To determine which change to the galvanic cell would cause an increase in the cell potential (become more positive), we need to examine the half-reactions and the Nernst equation.

The given galvanic cell can be represented as:

Zn(s) | Zn2+(aq) || Pb2+(aq) | Pb(s)

The reduction half-reaction occurring at the cathode (positive electrode) is:

Pb2+(aq) + 2e- → Pb(s) (Reduction)

The oxidation half-reaction occurring at the anode (negative electrode) is:

Zn(s) → Zn2+(aq) + 2e- (Oxidation)

The cell potential (Ecell) can be determined using the Nernst equation:

Ecell = E°cell - (RT/nF) * ln(Q)

Where:

Ecell is the cell potential

E°cell is the standard cell potential

R is the ideal gas constant (8.314 J/(mol·K))

T is the temperature in Kelvin

n is the number of electrons transferred in the balanced half-reaction

F is the Faraday constant (96,485 C/mol)

Q is the reaction quotient

Since we want to determine which change will increase the cell potential, let's analyze each option:

a) Increase the Zn2+: If the concentration of Zn2+ is increased, it will affect the reaction quotient (Q) by increasing the concentration of Zn2+ in the anode half-cell. According to the Nernst equation, an increase in Q will result in a decrease in the cell potential (more negative), so this change would not increase the cell potential.

b) Increase the Pb2+: Similarly, increasing the concentration of Pb2+ will affect the reaction quotient (Q) by increasing the concentration of Pb2+ in the cathode half-cell. According to the Nernst equation, an increase in Q will result in a decrease in the cell potential (more negative), so this change would not increase the cell potential.

c) Increase the mass of Zn: The mass of Zn does not directly affect the cell potential. The concentration of Zn2+(aq) would remain the same, as the concentration is determined by the concentration of Zn2+(aq) and not the mass of Zn. Therefore, increasing the mass of Zn would not increase the cell potential.

d) Decrease the mass of Zn: Similarly, the mass of Zn does not directly affect the cell potential. The concentration of Zn2+(aq) would remain the same, so decreasing the mass of Zn would not increase the cell potential.

Based on the analysis, none of the given changes (a, b, c, d) would cause the cell potential to increase (become more positive). The cell potential is determined by the standard cell potential (E°cell) and the concentrations of the species involved in the half-reactions.

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Answer:

7.1 g

Explanation:

A way to figure this out is by using the molecular formula.

\(Na + Cl\) ⇒ \(NaCl\)

(Sodium + Chloride ⇒ Sodium Chloride)

From this formula it's one mol sodium + one mol chloride = one mol of sodium chloride.

Then you can substitute the values:

4.6 grams sodium + x grams chlorine = 11.7 g of sodium chloride

By using algebra you get:

x = 11.7 - 4.6 = 7.1 g

You can check this by using the molar masses of sodium and chlorine which can take a more time and is kind of unnecessary.

Hope that helps!

N2 + 3 H2 = 2 NH3

Reaction type: synthesis

Answer:

The second ionization energy of Mg is larger than the first because it always takes more energy to remove an electron from a positively charged ion than from a neutral atom. The third ionization energy of magnesium is enormous, however, because the Mg2+ ion has a filled-shell electron configuration.

Explanation:

MAKE SURE TO REPHRASE

Answer:

Zinc chromate

Explanation:

The amount of carbon dioxide created by the combustion of three moles of propane will vary depending on the reaction's circumstances (e.g. temperature and pressure).

Million British thermal units (mmbtu) are converted to therms, and then the carbon coefficient, the fraction oxidised, and the ratio of the molecular weight of carbon dioxide to carbon (44/12) are multiplied to get the carbon dioxide emissions per therm. 0.1 mmbtu is equivalent to one therm (EIA 2019).

In conclusion! The final balanced equation of the provided equation is C3H8 + 5O2 ——-> 3CO2 + 4H2O.

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Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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Answer:

The density is 6

Explanation:

p = m × v

p = 3 × 2

p = 6

Hope this helped! :)

The density of the substance depends on the mass and the volume of the substance or object. It is given by the ratio of mass and volume. The density of 3 gm solid is 1.5 g/cm³.

In chemistry and physics, density is a quantitative measurement that tells about the tightness of the substance packed in an area. It relates to two parameters that include mass and volume.

The density can be said to have a proportion of mass to the volume of the substance. The mass can be in grams or kilograms, while volume can be in a liter, cubic meter, and cubic centimeter.

Given,

Mass of solid (M) = 3 gm

The volume of solid (V) = 2 cm³

Density (ρ) is calculated as:

ρ = M ÷ V

= 3 ÷ 2

= 1.5 gm/cm³

Therefore, 1.5 gm/cm³ is the density of 3 gm solid.

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Answer:

the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat

Explanation:

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Answer:

Convection when heat travels through metal or appliances.

Explanation: