The following reaction takes place in a 1.00 liter container at 750.0 °C.
H2(g) + CO2(g) ⇌ H2O(g) + CO(g)
At equilibrium there are 0.106 moles of H2, 0.106 moles of CO2, 0.094 moles of water and 0.094 moles of CO. What is the Keq for this reaction?

According to the label the true statement about the following substance is option c. It does not pose a health risk

Specially designed labels with particularly specialised adhesive qualities are called "lab labels." In the pharmaceutical or medical industry, as well as in laboratories, they are used for labelling. For the labelling of tubes, test tubes, blood bags, and other types of vessels, special laboratory labels are created.

Labels on chemicals

The identify of the hazardous chemical(s) in the container (for example, chemical name) and the dangers present must both be listed on this label. This warning about hazards can be distributed in a variety of ways. Employers want to choose a solution that will function in each place.

The following label indicates that the chemical does not pose a health risk.

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Answer:

Observation

-I smell onions

-My dog weighs 45 pounds

-It is 85 degrees outside today

Predictions

-My dog will bark at the vacuum cleaner

although he has never seen it before

-My mother is going to cook spaghetti for

supper next Tuesday

-It will be a long, hot summer

Explanation:

Answer:

See attached image.

Explanation:

The explanations are on the attachment.  The numerical results are below.

1.  63g/7cm^3 = 9 g/cm^3

2.  The m or mm must be converted so that the units are the same.  1 m = 1000 mm.  I'll convert the meters to mm:  0.080 m = 80 mm.

480 mm^2/80 mm = 6 mm

3.  L times L makes no physical sense, unless this is a new Star Wars technique for making dark matter.  Entertaining, but useless.

Answer:

A

Explanation:

The more gas magma contains, the more explosive a volcanic eruption will be.

We have to determine the molecular formula of a compound. We know that its empirical formula is CH. To find the molecular formula we have to compare the molar mass of the empirical formula with the molar mass of the compound (65.09 g/mol).

Let's start determining the molar mass of the empirical formula. The atomic masses of C and H are:

C: 12.01 amu H: 1.01 amu

With those values we can calculate the molar mass of CH:

molar mass of CH = 1 * 12.01 + 1 * 1.01

molar mass of CH = 13.02 g/mol

If we divide the molar mass by the molar mass of the empirical formula we will get the relationship between them.

x = molar mass/molar mass of the empirical formula

x = 65.09 g/mol / (13.02 g/mol)

x = 5

Finally to get the molecular formula we have to multiply each element by that ratio.

Answer: C₅H₅ is the molecular formula.

Since the rate law is determined to be rate = k[NOPTH], it implies that the rate-determining step must involve the reactants NOPTH. In the given mechanism, the only step that involves NOPTH is Step 2, which has NO and H2 as reactants.

Therefore, Step 2 is the rate-determining step. Note that the rate law only provides information about the reactants that appear in the rate expression, but it does not provide information about the mechanism or the order of the steps. The rate law can be used to determine the overall reaction order, which is the sum of the exponents of the concentrations in the rate law. However, it does not provide information about the specific mechanism or the individual steps.

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A chemical compound is a substance formed by the union of two or more chemical elements in a fixed ratio, the union being a chemical bond.

A pure substance is a substance that are made up of only one kind of particle and have a fixed or constant structure. Pure substances are further classified as elements and compounds.

A molecule is the smallest particle of a specific element or compound that retains the chemical properties of that element or compound; two or more atoms held together by chemical bonds.

A mixture is a compound made up of two or more chemical components that are not chemically linked together. This means that a mixture can be made of elements, compounds etc. but not the other way round.

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Answer:

D) H₂SO4 is an acid

Explanation:

Please mark branliest

H\(_2\)SO\(_4\) is the chemical formula that should be classified as an acid. Therefore, the correct option is option D.

Any substance that tastes acidic when dissolved in water, alters the colour of some indicators, reacts with the some metals to release hydrogen, reacts using bases to produce salts, and stimulates some chemical reactions is considered to be an acid. The inorganic chemicals referred to as being mineral acids sulfuric, nitrous, hydrochloric, or phosphoric acids are examples of acids.

The phenolic, sulfonic, and carboxylic acid groups of organic molecules. These chemicals contain one or maybe more hydrogen atoms, which are discharged into highly charged hydrogen ions when they are in solution. H\(_2\)SO\(_4\) is the chemical formula that should be classified as an acid.

Therefore, the correct option is option D.

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A major source of iodide in the North American diet is iodized salt. Iodized salt is regular table salt that has been fortified with iodine. The addition of iodine to salt was implemented as a public health measure to prevent iodine deficiency, which can lead to thyroid problems and other health issues.

Iodine is an essential nutrient required for the production of thyroid hormones. Since the body cannot produce iodine on its own, it must be obtained from the diet. In regions where iodine deficiency is prevalent, such as some areas of North America, iodized salt is commonly used to ensure an adequate intake of iodine.

By consuming iodized salt in cooking and food preparation, individuals can easily incorporate iodine into their diet. The iodine content in iodized salt is carefully regulated to provide a consistent and reliable source of iodine for the population.

Other dietary sources of iodine include seafood, seaweed, dairy products, and some fruits and vegetables; however, iodized salt remains one of the primary sources of iodine in the North American diet due to its widespread use and availability.

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When red blood cells are placed in Solution A, which contains 150 mM NaCl, no significant changes occur because the concentration of sodium chloride is similar to that of the cells' internal environment. The isotonic nature of Solution A ensures that there is no net movement of water across the cell membrane, resulting in the cells maintaining their normal shape and size.

However, when comparing the tonicity of Solutions B, C, D, and E to Solution A and each other, differences arise. Tonicity refers to the osmotic pressure exerted by a solution on a cell and is influenced by the concentration of solutes within the solution. Solutions B and E both contain additional solutes along with NaCl.

Solution B, consisting of 100 mM glucose and 100 mM NaCl, has a higher tonicity compared to Solution A. Glucose cannot freely cross the cell membrane, creating an osmotic gradient that draws water into the red blood cells, causing them to swell.

Solution C contains 100 mM Drug X, a small non-polar molecule, along with 150 mM NaCl. Since Drug X is non-polar, it can freely cross the cell membrane. The presence of Drug X does not significantly affect the tonicity compared to Solution A, as it does not create an osmotic gradient.

In contrast, Solution D, which contains 150 mM MgCl2, has a higher tonicity than Solution A. MgCl2 dissociates into Mg2+ and Cl- ions, both of which cannot cross the cell membrane easily. The higher concentration of impermeable ions creates an osmotic gradient, leading to water loss from the red blood cells and causing them to shrink.

Lastly, Solution E consisting of 300 mM fructose has a higher tonicity compared to Solution A. Fructose cannot freely cross the cell membrane, resulting in an osmotic gradient that draws water into the red blood cells, causing them to swell.

In summary, placing red blood cells in Solution A does not produce significant changes in the cells. However, when comparing the tonicity of Solutions B, C, D, and E to Solution A and each other, variations in osmotic pressure occur due to the presence of different solutes.

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Answer:

What are 3 physical properties of nitrogen?

Elemental nitrogen is a colorless, odorless, tasteless, and mostly inert diatomic gas at standard conditions, constituting 78.09 percent of Earth's atmosphere by volume.

What are 2 chemical properties of nitrogen?

Elemental nitrogen is a colorless, odorless, tasteless, and mostly inert diatomic gas at standard conditions, constituting 78.09 percent of Earth's atmosphere by volume. Nitrogen gas is an industrial gas produced by the fractional distillation of liquid air or by mechanical means using gaseous air.

Answer:

Salt and water is produced.

For example:-

NaOH(base)+HCl(Acid)=>NaCl(salt)+H20(water)

*mark me brainliest

An acid is a molecule that can donate free \(H^{+}\) ions, thereby lowering the pH of a solution.

Acids are substances that can release hydrogen ions (\(H^{+}\)) when dissolved in water or in an aqueous solution. When an acid donates an H+ ion, it increases the concentration of  \(H^{+}\) ions in the solution, which leads to a decrease in pH. pH is a measure of the acidity or alkalinity of a solution, with lower pH values indicating higher acidity.

Acids can be classified as strong acids or weak acids based on their ability to donate \(H^{+}\) ions. Strong acids completely dissociate in water, releasing a high concentration of \(H^{+}\) ions. Examples of strong acids include hydrochloric acid and sulfuric acid. Weak acids partially dissociate in water, resulting in a lower concentration of \(H^{+}\) ions. Examples of weak acids include acetic acid and citric acid.

When an acid donates an\(H^{+}\) ion, it can react with other substances or molecules, leading to various chemical reactions and changes in the properties of the solution. Acids are widely used in various industries, research, and everyday life, playing important roles in processes such as digestion, chemical synthesis, pH regulation, and more.

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Complete question: What is an acid?

A molecule that can accept free H+ to a solution and increases its pH.

None                                            

A molecule that can donate free H+ and lower its pH.

A molecule that can donate free H+ and increases its pH

A molecule that can accept free H+ to a solution and lower its pH.

The element in Period 7, group 2 is radium (Ra), which has 88 protons.

Radium (Ra) is a highly radioactive metallic element with the atomic number 88 and symbol Ra in the periodic table. It is a member of the alkaline earth metals group and is the heaviest of its members. Radium is silvery-white in color, but it quickly oxidizes on exposure to air and turns black.

Radium was discovered in 1898 by Marie and Pierre Curie, who isolated it from uranium ore. It is extremely radioactive, with a half-life of approximately 1,600 years. It emits alpha, beta, and gamma rays, which can be very dangerous to living organisms. Radium is used in some medical treatments, such as radiation therapy for cancer, but it is also a known carcinogen and can cause bone cancer if ingested or inhaled.

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When a radioactive source is in front of a plate of aluminum foil. On the opposite side, radiation of two different sorts is found. There won't be any indication of the alpha particle radiation.

A known volume of a radionuclide that emits ionizing radiation—typically gamma radiation, alpha particles, beta particles, including neutron radiation—is referred to as a radioactive source.

The NHS, paper and steel manufacture, food irradiation, medical sterilization, the construction industry, and oil and gas exploration are just a few of the businesses that heavily utilize radioactive sources.

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Answer:

0.123 M

Explanation:

Molarity, which is molar concentration can be calculated by using the formula;

Molarity = number of moles (n) / Volume (V)

Number of moles of NH4NO3 can be calculated by using;

Mole = mass (M) / Molar mass (MM)

Since atomic mass of N= 14, H=1, O=16

Molar mass of NH4NO3 = 14 + 1(4) + 14 + 16(3)

= 14 + 4 + 14 + 48

= 80g/mol

1 pounds = 454g

2.13 pounds= 2.13 × 454 g

= 967.02g

Hence; mole of NH4NO3 = 967.02/80

= 12.09moles

Molarity of NH4NO3 in water (solution) = number of moles of NH4NO3 ÷ volume of water

1 gallon = 3.79Litres

26gallons = 26 × 3.79 litres

= 98.54 Litres

Therefore, Molarity = 12.09/98.54

Molarity of NH4NO3 solution = 0.1226

= 0.123M or mol/L

The denominator of density determines how quickly a gas diffuses 16.7 seconds.

It will be equal to 36 or 6 if,

7/16 x 6

7/4 x 6

But chlorine has a volume that is double that of oxygen. Chlorine escapes at a rate of

7 x 3 (2/1 x 7/4 x 6) = 21 seconds.

A diffusion is what?

A substance diffuses when it moves from a region with a high concentration to one of lower concentration. When particles in gases and liquids randomly collide and disperse, diffusion takes place. For living things, diffusion is a crucial mechanism because it governs how molecules enter and exit cells.

Definition: A substance's movement (whether it be a solid, liquid).

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The denominator of density determines how quickly a gas diffuses 16.7 seconds.

It will be equal to 36 or 6 if,

7/16 x 6

7/4 x 6

But chlorine has a volume that is double that of oxygen. Chlorine escapes at a rate of

7 x 3 (2/1 x 7/4 x 6) = 21 seconds.

A substance diffuses when it moves from a region with a high concentration to one of lower concentration. When particles in gases and liquids randomly collide and disperse, diffusion takes place. For living things, diffusion is a crucial mechanism because it governs how molecules enter and exit cells.

Definition: A substance's movement (whether it be a solid, liquid).

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Answer:

air, water, sunlight

Explanation:

A limiting factor may be defined as a environmental condition or a resource that can limit the plant growth as well as distribution or the abundance of an organism or its population within the ecosystem. The ability  of any plant species to grow and spread throughout any geographic area is the direct result of the adaption to its biotic  and abiotic components of that region.

Some of the factor that affect the plant growth are : sunlight, air, proper temperature, moisture, nutrients, wind,etc.

The lack of the any one of the above essential component will determine the health of the  plant.

Answer in the attachment above.....

Answer:

no, because our nation is just too big. it would be difficult to keep track of votes and find a common ground amongst all the people

Answer:

i-  lol

Explanation:

yes

Answer:

34 fortnights

Explanation:

Convert months into weeks. Do this by multiplying the number of months with 4 because there are 4 weeks in a month.

17 x 4 = 68

There are 68 weeks in 17 months

A fortnight is 2 weeks. To find how many fortnights are in 68 weeks, divide 68 weeks by 2 weeks

68 / 2 = 34

There are 34 fortnights in 68 weeks or 17 months

Answer:

4km

Explanation:

Answer:

migraine

Explanation:

d

The closest answer option is B) \(4.2\times 10^-5 M\), which is within reasonable rounding error.

What is solubility equilibrium?

Solubility equilibrium is a type of chemical equilibrium that occurs when a solid compound is in contact with a solvent, and a dynamic balance is established between the dissolved ions and the undissolved solid. At this point, the concentration of the dissolved ions remains constant over time, and the undissolved solid appears to be at rest or "saturated".

The solubility equilibrium for \(Ag$_2$CrO$_4$\) can be represented as:
\(\begin{equation}\text{Ag}_2\text{CrO}_4\text{(s)} \rightleftharpoons 2\text{Ag}^{+}(\text{aq}) + \text{CrO}_4^{2-}(\text{aq})\end{equation}\)
The Ksp expression for this equilibrium is:
\(\begin{equation}\text{K}_{\text{sp}} = [\text{Ag}^{+}]^2[\text{CrO}_4^{2-}]\end{equation}\)
To perform the calculations, we can use the given values of \([Ag$^{+}$]\) and \(K$_{\text{sp}}$\), and assume that x is the molar solubility of \(Ag$_2$CrO$_4$\) in mol/L. At equilibrium, the concentration of \(Ag$^{+}$\) and \(CrO$_4^{2-}$\) will both be 2x mol/L. So, we can write:
\(\begin{equation}\text{K}_{\text{sp}} = (2x)^2(x) = 4x^3\end{equation}\)

Solving for x, we get:
\(\begin{equation}x = \left(\frac{\text{K}_{\text{sp}}}{4}\right)^{\frac{1}{3}} = \left(\frac{2.0\times10^{-12}}{4}\right)^{\frac{1}{3}} = 5.3\times10^{-5} \text{ M}\end{equation}\)
Therefore, the molar solubility of \(Ag$_2$CrO$_4$\) in the presence of
0.153 M AgNO\($_3$ is 5.3 $\times$ 10$^{-5}$ M\).

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(a) Oxidation half-reaction: In an oxidation half-reaction, a species loses electrons and increases its oxidation state.

(b) Reduction half-reaction: In a reduction half-reaction, a species gains electrons and decreases its oxidation state.

(c) Standard cell potential: The standard cell potential, or electromotive force, of an electrochemical cell is the difference in electrode potentials between the two half-cells under standard conditions. It is a measure of the driving force for the reaction to occur.

Ag+(aq) + Fe(aq) --> Ag3+(aq) + Fe3+(aq)

(a) Fe --> Fe3+ + 3e-

(b) Ag+ + e- --> Ag

(c) E°cell = E°reduction + E°oxidation = 0.80 V + (-0.44 V) = 0.36 V

Br-(aq) + Hg22+(aq) --> Br2(l) + Hg(l)

(a) Hg22+ + 2e- --> Hg(l)

(b) 2Br- --> Br2 + 2e-

(c) E°cell = E°reduction + E°oxidation = 0.79 V + (-0.85 V) = -0.06 V

Be(s) + Au3+(aq) --> Be2+(aq) + Au+(aq)

(a) Au3+ + 3e- --> Au+

(b) Be --> Be2+ + 2e-

(c) E°cell = E°reduction + E°oxidation = 1.68 V + (-1.85 V) = -0.17 V

Ac and Bi: Sorry, there is no given reaction for this system.

Ni and Cd: Sorry, there is no given reaction for this system.

Ce and Cr:

(a) Cr --> Cr3+ + 3e-

(b) Ce4+ + e- --> Ce3+

(c) E°cell = E°reduction + E°oxidation = 1.61 V + (-1.44 V) = 0.17 V

Note: The values given for the standard reduction potentials (E°reduction) are taken from standard reference tables at 25°C and 1 atm pressure.

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Answer:

Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons). Examples include neon, argon (Ar), and krypton . Oxygen, like all the other elements in group 16, has six valence electrons.

A nucleus of uranium 238 decays by alpha emission to form a daughter nucleus, thorium 234.

Isotopes are atoms with the same number of protons but differ in numbers of neutrons.

Uranium-238 produces thorium-234 by alpha decay.

An α-particle is a helium nucleus. It contains 2 protons and 2 neutrons, for a mass number of 4.

During α-decay, an atomic nucleus emits an alpha particle. It transforms (or decays) into an atom with an atomic number 2 less and a mass number 4 less.

Thus, uranium-238 decays through α-particle emission to form thorium-234 according to the equation:

\(^{238}_{92}U\;\rightarrow\;^{234}_{90}Th\;+\;^4_2He\)

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Answer:

increase.

Explanation:

as you cross the period the atomic size decrease makes the atoms to have more affinity to the coming electrons.