for no−2no2− , enter an equation that shows how the anion acts as a base.

Answer:

96 g/mol.

Explanation:

As a result, as shown below, the molecular weight of sulfate SO4 can be easily calculated.

=(S) + 4(O)\s

= (32) + 4(16)\s

= 32 + 64.\s

= 96.

As a result, the molecular mass of sulfuric acid SO4 is 96 g/mol.

Answer:

Below

Explanation:

Use your Periodic Table of Elements

  sulfur = 32.06 gm  molar mass

  oxygen= 15.999  gm   ( and there is FOUR of these)

       total = 96.056 gm  molar mass for SO4

Human activities that disrupt the carbon cycle include the burning of fossil fuels. The statement that best summarizes the disruption of the carbon cycle due to the burning of fossil fuels is: b) Burning fossil fuels adds carbon compounds to all Earth systems.

When fossil fuels, such as coal, oil, and natural gas, are burned, carbon that has been stored in these fuels for millions of years is released into the atmosphere as carbon dioxide and other greenhouse gases. This process significantly increases the amount of carbon compounds in Earth’s systems, including the atmosphere.

The burning of fossil fuels contributes to the increase in atmospheric CO2 levels, which is a major driver of anthropogenic climate change. The additional carbon compounds released from burning fossil fuels disrupt the natural balance of the carbon cycle by adding more carbon to the atmosphere than can be naturally absorbed by Earth’s systems. This leads to an accumulation of greenhouse gases and contributes to global warming and associated climate impacts. While other statements may partially describe the effects of burning fossil fuels on the carbon cycle, option b provides the most accurate and comprehensive summary of the disruption caused by this activity.

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If the unknown solution tested positive in both test 44 and test #7, it indicates a potential error in the experiment. Test 44 and test #7 are designed to detect different properties or components of the solution.

A positive result in both tests suggests a discrepancy or inconsistency in the results, which may be due to contamination, experimental errors, or improper technique.

While a positive result in both tests indicates a problem with the experimental procedure, it does not provide clear information about the nature or identity of the unknown solution. It could be a false positive due to an experimental error or a genuine indication of the presence of certain components. Further investigation and additional tests may be required to determine the true nature of the solution.

On the other hand, if the unknown solution tested negative in both test 44 and test #7, it suggests that the solution does not possess the expected properties or components that the tests were designed to detect. This result could indicate that the solution does not contain certain substances or is not consistent with the expected composition.

In terms of the impact of these outcomes, it would depend on the specific context and objectives of the experiment. However, generally speaking, if the unknown solution tested positive in both tests, it raises concerns about the reliability and accuracy of the experimental procedure. It highlights the need for further investigation and analysis to determine the true nature of the solution. Conversely, if the unknown solution tested negative in both tests, it provides clearer information regarding the absence of expected components or properties, although additional tests may still be required to draw definitive conclusions.

Overall, the scenario where the unknown solution tests positive in both tests is generally considered worse because it introduces more uncertainty and questions the reliability of the experimental results.

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Answer:

Oxygen is the limiting reagent.

Explanation:

First you must make a chemical equation. Then you will do a mole bridge from the moles of each given substance to a product, you can find how much product each will create. The reactant that creates the least is the limiting reagent. I hope this helps!

Answer:

32.1

Explanation:

The number below the element Sulfur is 32.06, which if rounded to the nearest 10th is 32.1.

They are all correct.

Explanation:

Answer:

21.92 gm

Explanation:

A 1.5 M  solution would have 1.5 * 58.44 = 87.66 gm per liter

   you only need 1/4 of this (250 ml)    =  21.92 gm

The most likely acid-base imbalance in a patient with respiratory depression and a history of COPD is Respiratory Acidosis So option B is correct.

Respiratory acidosis is a condition where there is a buildup of carbon dioxide (CO2) in the body, leading to an acidotic pH, which is below 7.35. This can occur in patients with respiratory depression because CO2 is not being effectively removed from the body through normal breathing. In a patient with a history of COPD, it is even more likely that this could occur because COPD can cause decreased lung function and decreased ability to effectively breathe and remove CO2.

Metabolic alkalosis is a condition where there is an excessive loss of acids from the body, leading to an alkaline pH, which is above 7.45. This is unlikely in this scenario.

Metabolic acidosis is a condition where there is an accumulation of acid in the body, leading to an acidotic pH. This is also unlikely in this scenario.

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Answer:

c Two hydrogen one oxygen

Explanation:

H2O

Answer:

It is important to note that iron, cobalt, and nickel which appear in period 4, of the transition metals, next to each other, share very similar physical and chemical properties and are known collectively as the iron triad

The comparison of the properties of iron includes

Chemical properties

1) Atomic number; The atomic number of iron is 26 while the atomic number of nickel is 28

2) The oxidation states of iron are 2, 3, 6 while the oxidation state of nickel are 2,3

3) The ionization energies in kJ/mol  are first 759, second 1561, and third 2957 for iron and first 737, second 1753, and third 3393 for nickel

Physical properties

1) The mass of iron is 55.85 with density = 7.87 g/cm³, the mass of nickel is 58.69 with density = 8.91 g/cm³

2) The melting point of iron is 1530°C, boiling point 2862°C and that of nickel are 1455°C and 2732°C

3) The electrical conductivity of iron is 16 and that of nickel is 23

Explanation:

An isoelectronic series refers to a group of atoms, ions, or molecules that have the same number of electrons and therefore the same electronic configuration. This is due to the fact that the electron configuration has a significant impact on the chemical behavior of an element, particularly when it comes to bonding and reactivity.

In isoelectronic species, the number of protons in the nucleus determines the properties. The electron configuration for a neutral atom of an element is the same as that of its isoelectronic ion. The isoelectronic pairs have the same number of electrons but are composed of different atoms.

They all contain ten electrons with electronic configuration 1s2 2s2 2p6. Moreover, nitrogen's atomic number is seven, oxygen's atomic number is eight, and fluorine's atomic number is nine. Therefore, each ion has one extra electron more than their neutral counterparts.

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when 51.8 and 67.5 are multiplied, the product has three significant figures, and when 51.8 and 67.5 are added, the sum has three significant figures.

The significant figures in multiplying  51.8 and 67.5:

51.8 ×  67.5 = 3496.5 = 3.50  × 10^3

Now according to the rules of significant figures

All non-zero numbers and trailing zeros to the right of the decimal are significant. But 10 and power of ten like in this case its 3 are not significant. So the product has three significant figures.

The significant figures in adding 51.8 and 67.5:

51.8 +  67.5 = 119.5

Now, according to the rules of significant figures, all non-zero digits are significant figures. So the sum has 4 significant figures.

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Answer:

Inert gases or noble gases

Explanation:

These gases have 8 outer shells meaning their full so they won't allow chemical reactions therefore providing an inert environment hence the name inert gas.

Answer:

64.52 mg.

Explanation:

The following data were obtained from the question:

Half life (t½) = 1590 years

Initial amount (N₀) = 100 mg

Time (t) = 1000 years.

Final amount (N) =.?

Next, we shall determine the rate constant (K).

This is illustrated below:

Half life (t½) = 1590 years

Rate/decay constant (K) =?

K = 0.693 / t½

K = 0.693/1590

K = 4.36×10¯⁴ / year.

Finally, we shall determine the amount that will remain after 1000 years as follow:

Half life (t½) = 1590 years

Initial amount (N₀) = 100 mg

Time (t) = 1000 years.

Rate constant = 4.36×10¯⁴ / year.

Final amount (N) =.?

Log (N₀/N) = kt/2.3

Log (100/N) = 4.36×10¯⁴ × 1000/2.3

Log (100/N) = 0.436/2.3

Log (100/N) = 0.1896

Take the antilog

100/N = antilog (0.1896)

100/N = 1.55

Cross multiply

N x 1.55 = 100

Divide both side by 1.55

N = 100/1.55

N = 64.52 mg

Therefore, the amount that remained after 1000 years is 64.52 mg

Answer:

\(\rm K\): approximately \(22.0\%\).

\(\rm Cl\): approximately \(19.9\%\).

\(\rm O\): approximately \(27.0\%\).

\(\rm Al\): \(31.0\%\).

Explanation:

Consider a \(100\; \rm g\) sample. There would be \(69.0\% \times 100\; \rm g = 69.0\; \rm g\) of \(\rm KClO_{3}\) and \(100.0\; \rm g - 69.0\; \rm g = 31.0\; \rm g\) of \(\rm Al\).

Out of that \(69.0\; \rm g\) of \(\rm KClO_{3}\):

\(31.9\%\) (by mass) would be \(\rm K\): \(31.9\% \times 69.0\; \rm g \approx 22.0\; \rm g\).

\(28.9\%\) (by mass) would be \(\rm Cl\): \(28.9\% \times 69.0\; \rm g \approx 19.9\; \rm g\).

\(39.2\%\) (by mass) would be \(\rm O\): \(39.2\% \times 69.0\; \rm g \approx 27.0\; \rm g\).

Overall, the composition (by mass) of each element in this mixture would be:

\(\rm K\):

\(\begin{aligned} & \frac{31.9\% \times 69.0\; \rm g}{100\; \rm g} \\ =\; & 31.9\% \times 69.0\% \\ \approx \; & 22.0\%\end{aligned}\).

\(\rm Cl\):

\(\begin{aligned} & \frac{28.9\% \times 69.0\; \rm g}{100\; \rm g} \\ =\; & 28.9\% \times 69.0\% \\ \approx \; & 19.9\%\end{aligned}\).

\(\rm O\):

\(\begin{aligned} & \frac{39.2\% \times 69.0\; \rm g}{100\; \rm g} \\ =\; & 39.2\% \times 69.0\% \\ \approx \; & 27.0\%\end{aligned}\).

\(\rm Al\):

\(\begin{aligned}& \frac{100\; \rm g - 69.0\; \rm g}{100\; \rm g} \\ =\; & 100\% - 69.0\% \\ =\; & 31.0\%\end{aligned}\).

When you add 3 pieces of zinc to blue copper sulfate and hydrochloric acid, a single displacement reaction occurs. The zinc is more reactive than copper, so it displaces copper from the copper sulfate. The reaction can be written as:

Zn(s) + CuSO4(aq) → Cu(s) + ZnSO4(aq)

In the presence of hydrochloric acid, the reaction proceeds as follows:

Zn(s) + CuSO4(aq) + 2HCl(aq) → Cu(s) + ZnCl2(aq) + H2SO4(aq)

In this reaction, zinc (Zn) reacts with copper sulfate (CuSO4) and hydrochloric acid (HCl) to form copper (Cu), zinc chloride (ZnCl2), and sulfuric acid (H2SO4). The copper is seen as a reddish-brown solid precipitate, while the sulfuric acid remains dissolved in the solution.

Approximately x% of the acid is dissociated in a 0.50 M solution of HA at 25°C.

The percent dissociation of an acid can be determined using the acid dissociation constant (Ka) and the initial concentration of the acid (HA). The mathematical expression for percent dissociation is:

Percent Dissociation = (Dissociated HA concentration / Initial HA concentration) * 100

In this case, we are given that the acid dissociation constant (Ka) for acid HA is known at 25°C, and we have a 0.50 M solution of HA. However, the value of Ka and specific acid are not provided, so we cannot calculate the exact percent dissociation.

To calculate the percent dissociation, you would need the value of Ka for the specific acid, which indicates the extent of dissociation at equilibrium. Based on this value and the initial concentration of HA, you can calculate the dissociated HA concentration and then use the mathematical expression mentioned above to determine the percent dissociation.

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Aluminum is easiest to recycle because it is a weak metal and can be used as a filling alloy.

P₂O₅

English-

the formula to phosphoric anhydride is P₂O₅

Spanish-

la fórmula del anhídrido fosfórico es P₂O₅

The system is not at equilibrium.

The reaction will proceed to the right to attain the equilibrium.

Let's consider the following reaction.

2 NOBr(g) ⇌ 2 NO(g) + Br₂(g)

The pressure equilibrium constant (Kp) is 60.6. To determine if the system is at equilibrium when the pressure of each component is 1.75 atm, we have to calculate the reaction quotient (Q) and compare it with Kp.

Q = [NO]².[Br₂] / [NOBr]²

Q = (1.75)².(1.75) / (1.75)²

Q = 1.75

Since Q ≠ Kp, the system is not at equilibrium.

Since Q < Kp, the reaction will proceed to the right to attain the equilibrium.

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The approximate radius of a 12 Cd nucleus is 2.75 femtometers (fm).

The radius of a nucleus can be estimated using the empirical formula given below:

R = r₀ × A¹⁾³

R is the radius of the nucleus,

r₀ is a constant,

A is the mass number (the number of protons and neutrons) of the nucleus.

For a 12 Cd nucleus, A = 12 (the mass number of Cadmium).

The constant r₀ is approximately 1.2 femtometers (1.2 fm).

Now, substituting the values into the formula:

R = (1.2 fm) × (12)¹⁾³

R = 1.2 fm × 2.29

R = 2.75 fm

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Answer:

1.81 x 10²⁴atoms

Explanation:

Given parameters:

Number of molecules  = 3 moles

Unknown:

Number of atoms = ?

Solution:

To solve this problem, we are going to use the mole concept.

   1 mole of any substance contains 6.02 x 10²³ atoms

 So

   3 mole of propanone will contain 3 x  6.02 x 10²³ atoms  = 1.81 x 10²⁴atoms

During the scientific investigation, a sample of matter break down into two kinds of atoms full stop the original sample is a compound because it is made up of two kinds of atoms.

Compounds are the substances made up of the mixing of two kinds of atoms or more than two kinds of atoms. An example is a water made up of hydrogen and oxygen.

A compound always contains more than one atom. This can be of similar atoms and this can be of different kinds of atoms.

Whereas the element is always made up of one kind of atom. That's why elements are the purest form of atoms. So the given compound is breakdown into two kinds of atoms, so it is a compound, not an element.

Thus, because the original sample was made up of two separate components rather than just one, it was a compound.

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Answer:

The first one has 5 valence electrons, and the second has 7. (This can be counted by counting the amount of black dots on the biggest circle). Since 7 > 5, it would be easier for the second one to gain one (so that it completes it's valence shell) so the answer is the second one.

Answer:

Kc = 50.5

Explanation:

We determine the reaction:

H₂  +  I₂   ⇄   2HI

Initially we have 0.001 molesof H₂

and 0.002 moles of I₂

If we have produced 0.00187 moles of HI in the equilibrium we have to know, how many moles of I₂ and H₂, have reacted.

           H₂     +      I₂      ⇄   2HI

In:     0.001       0.002           -

R:       x                 x                2x

Eq:  0.001-x    0.002-x      0.00187  

x = 0.00187/2 = 9.35×10⁻⁴ moles that have reacted

So in the equilibrium we have:

0.001 - 9.35×10⁻⁴ = 6.5×10⁻⁵  moles of H₂

0.002 - 9.35×10⁻⁴ = 1.065×10⁻³ moles of I₂

Expression for Kc is =  (HI)² / (H₂) . (I₂)

0.00187 ² /  6.5×10⁻⁵ . 1.065×10⁻³ = 50.5

Answer:

IT IS A C D I GOT IT WRONG FROM THE ANSWER ON TOP OF ME

Explanation:

4 moles of nitrogen monoxide gas used to form 72.0 grams of water vapor.

A mole is the measurement unit which is used to correlate the molar mass with number of molecules present.

The equation for reaction of Nitrogen monoxide to form water vapor is given by

4NH₃ + 6NO ----> 5N₂ + 6H₂O

72 grams of water vapor means = 72/18 = 4 mole of water vapour

The mole fraction of NO to H₂O is 6 : 6

Therefore for 4 moles of water vapor formation , 4 moles of nitrogen monoxide will be required.

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Answer:

the answer is a

Explanation:

Voltage can be thought of as the pressure pushing charges along a conductor, while the electrical resistance of a conductor is a measure of how difficult it is to push the charges along.