which pair of elements are nonmetals and gases at room temperature and normal atmospheric pressure ?

Between 9 and 12 pints of blood make up the average human body. A woman's body holds 10.01 pints of blood, whereas a human's body holds 6 litres of blood due to the density of haemoglobin. About 15.5g of hemoglobin per 100 mL of blood is present in blood.

A pint of blood is used up after a blood donation, but your body has an extraordinary ability to replenish all the lost cells and fluids.

An typical adult's body contains 8 to 12 pints of blood. One cup of blood makes up an infant's body at birth.

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The correct options for naming an ionic compound are:

The cation is named first and the anion second.

For a monatomic cation, the element name is unchanged.

For a monatomic anion, the element name is changed to end in -ide.

When naming an ionic compound, the cation (positive ion) is always named first, followed by the anion (negative ion). For monatomic cations, the element name remains the same. For example, Na^+ is simply called sodium.

On the other hand, for monatomic anions, the element name is modified to end in -ide. For example, Cl^- is named chloride. Greek prefixes are not used to indicate the number of atoms of a particular element present in ionic compounds.

Therefore, the correct options are: the cation is named first and the anion second, and for monatomic anions, the element name is changed to end in -ide.

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Answer:

92

98

35

35

Explanation:

Nitric oxide (III) reacts with H2O and H2SO4 easily.

Nitric oxide (III) can react with the following substances:

1. CaCl2 - This reaction should form calcium nitrite (Ca(NO2)2) and hydrochloric acid. But as both of them are water-soluble, therefore, no new product is formed.

2. H2O - When nitrogen dioxide reacts with water, it forms nitric acid (HNO₃) and nitrous acid (HNO₂).

3. H2SO4 - Nitrogen dioxide can dissolve in sulfuric acid to form nitrosylsulfuric acid (HNO3SO3), which can further hydrolyze to nitric acid and sulfuric acid.

4. KOH - Nitric oxide (III) can react with potassium hydroxide (KOH) to form potassium nitrite (KNO2), water and NO2  gas. It does not react with KOH (potassium hydroxide) under normal conditions.

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Answer:

Coefficient of 1 for all except Cl2, which has a coefficient of 3.

Explanation:

The left side of the equation has 6 chlorine atoms, so the right side also needs 6 chlorine atoms.

Answer:

Temperatures are cool.

Explanation:

Answer: d. Pressure is higher than crust.

Explanation:

At a given temperature, different liquids will have different equilibrium vapor pressures because the vapor pressure of a liquid depends on its intermolecular forces, molecular weight, and temperature. The equilibrium vapor pressure is a measure of the tendency of a liquid to evaporate and become a gas at a specific temperature.

Intermolecular forces, such as hydrogen bonding or London dispersion forces, play a significant role in determining the strength of attractions between molecules in a liquid. Liquids with stronger intermolecular forces will have lower vapor pressures because it requires more energy to overcome these forces and transition into the gas phase.

Molecular weight also influences vapor pressure. Generally, liquids with larger and heavier molecules will have lower vapor pressures compared to liquids with smaller and lighter molecules. This is because larger molecules have stronger intermolecular forces and require more energy to transition into the gas phase.

Furthermore, temperature affects the vapor pressure of a liquid. As the temperature increases, the average kinetic energy of the liquid molecules increases, resulting in more molecules with sufficient energy to overcome intermolecular forces and transition into the gas phase. Therefore, at higher temperatures, the vapor pressure of a liquid increases.

In summary, the equilibrium vapor pressure of a liquid is determined by the interplay of intermolecular forces, molecular weight, and temperature. Different liquids with varying intermolecular forces and molecular weights will exhibit different equilibrium vapor pressures at the same temperature.

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The increase in the diversity of species in an ecosystem  definitely lead to an increase in the productivity from that ecosystem. Hence, the statement is true.

An ecosystem is the regions in earth where  a group of living things and their essential non living things reside. There are various kind of ecosystems such as aquatic systems, forests, deserts etc.

The biodiversity refers to the diverse species of plants , animals and all other kind of livings there. By raising the possibility that species would use complementary resources and by increasing the likelihood that a highly productive or efficient species is present in the population, increasing species diversity can impact ecosystem functions, such as production.

For instance, greater use of soil resources can boost ecosystem production when there is a large diversity of plants. Similarly, when diverse plants populate more dependent animal variants survives more.

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Answer:

A. True

Explanation:

Got it right on Edge 2023.

The predominant chemical species affecting the pH is H₃O⁺, but the pH value of the resulting solution is actually 1.26.

To calculate the pH value of the resulting solution we need the number of moles of H⁺ ions (n) and the volume of the solution (V). The volume is easy - it is the sum of the volumes of the barium hydroxide solution (13.90 mL = 0.01390 L) and the hydrochloric acid solution (45.00 mL = 0.04500 L)

V(total) = V(Ba(OH)₂) + V(HCl)

V(total) = 0.01390 L + 0.04500 L = 0.05890 L

Now we need to calculate the number of moles of H⁺ (H₃O⁺) ions. The number of moles of H⁺ ions in the HCl solution is:

n(H⁺) = c(HCl) * V(HCl)

n(H⁺) = 0.300 M * 0.04500 L = 0.0135 mol

On the other hand, the number of moles of OH⁻ ions is double the number of moles of barium hydroxide, because 1 mol of barium hydroxide releases 2 moles of OH⁻ ions:

n(OH⁻) = 2 * c(Ba(OH)₂) * V(Ba(OH)₂)

n(OH⁻) = 2 * 0.370 M * 0.01390 L = 0.010286 mol

The number of moles of H⁺ ions is greater than the number of moles of OH⁻ ions, so after the neutralization, we will have an excess of H⁺ ions:

n(H₃O⁺) = n(H⁺) - n(OH⁻)

n(H₃O⁺) = 0.0135 mol - 0.010286 mol = 0.003214 mol

We can now finally calculate the concentration of H₃O⁺ ions in the final solution:

c(H₃O⁺) = n(H₃O⁺) / V(total)

c(H₃O⁺) = 0.003214 mol / 0.05890 L = 0.05457 M

From this, we can find the pH value of the solution:

pH = -log(c(H₃O⁺))

pH = -log(0.05457)

pH = 1.26

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Answer:

the protons, neutrons, and electrons that make up the atom?

Explanation:

The rate of change of \(SO_2\)(g)=0.024M/s when the rate of change of \(CS_2(g)\) is – 0.012 M/s.

Reaction rate, in chemistry, is the speed at which a chemical reaction proceeds.

\(CS_2(l)+3O_2(g)\) → \(CO_2(g)+2SO_2(g)\)

\(Rate = \frac{-dcs_2}{dt} =\frac{-do_2}{dt} =\frac{+dco_2}{dt} =\frac{1dso_2}{dt}\)

Rate = \frac{-dcs_2}{dt}  =\frac{-do_2}{dt} =\frac{+dco_2}{dt} =\frac{1dso_2}{dt}

Given:

\(\frac{-dcs_2}{dt} =-0.012 M/s\)

\(\frac{-dcs_2}{dt} =\frac{dso_2}{dt}\)

\(\frac{dso_2}{dt}=0.024M/s\)

The rate of change of \(SO_2\)(g)=0.024M/s

Hence, the rate of change of \(SO_2\)(g)=0.024M/s

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The given question represent the alpha decay of lawrencium, which is as follows: ²⁵⁶Lr₁₀₃ ⇒ ²⁵²Md₁₀₁ + ⁴He₂.

Alpha decay is a nuclear decay process in which an unstable nucleus changes into another element by emitting a particle of two protons and two neutrons. This emitted particle is known as an alpha particle and is simply a helium nucleus. Alpha particles usually have a relatively large mass and positive charge. This large mass means that alpha particles cannot travel very far in the air or penetrate solids very deeply. Alpha decay is rarely used in external medical radiotherapy because alpha particles act only on surfaces.

Alpha decay was firstly distinguished from other forms of radiation by Ernest Rutherford by observing the deflection of radiation due to magnetic fields. Alpha particles have a charge of +2e, so alpha decay is deflected, as would be expected of a positive particle.

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a. The breakdown voltage of air is a function of pressure and air gap spacing.

b. The minimum breakdown voltage occurs when the applied voltage reaches a critical value, which depends on the pressure and air gap spacing.

c. The minimum breakdown voltage occurs at atmospheric pressure (1 atm).

d. The minimum breakdown voltage occurs when the air gap spacing is 1 mm.

e. Gaseous insulation is preferred over liquid or solid insulation because it is more reliable, has higher dielectric strength, and is less likely to become contaminated or corroded. Additionally, gaseous insulation can be used in a wider range of operating temperatures.

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Answer:

In physics, the law of conservation of energy states that the total energy of an isolated system cannot change—it is said to be conserved over time. ... Energy can be neither created nor destroyed, but can change form; for instance, chemical energy can be converted to kinetic energy.

Explanation:

Step 1

The reaction involved here:

3 FeO + 2 Al => 3 Fe + AI2O3 (Don't forget to completed it and balance it)

---------------

Step 2

Data provided:

125 grams of FeO react with 25.0 grams of AI

--

Data needed:

The molar masses of:

FeO) 71.8 g/mol

Al) 27.0 g/mol

Fe) 55.8 g/mol

---------------

Step 3

The limiting reactant:

By stoichiometry,

3 FeO + 2 Al => 3 Fe + AI2O3

3 x 71.8 g FeO ----- 2 x 27.0 g Al

125 g FeO ----- X

X = 125 g FeO x 2 x 27.0 g Al/3 x 71.8 g FeO

X = 31.3 g Al

For 125 g of FeO, 31.3 g of Al is needed, but there is 25.0 g of Al, so the limiting reactant is Al.

-------------

Step 4

The amount of Fe produced:

By stoichiometry,

3 FeO + 2 Al => 3 Fe + AI2O3

2 x 27.0 g Al ---- 3 x 55.8 g Fe

25.0 g Al --- X = 77.5 g Fe

Answer: 77.6 g Fe (the closest value)

for some reason it won't let me type the answer, it's the first option

Answer:

Molecules are made of atoms. atoms are smaller. molecules have no electrons, atoms do.

Answer:

well one of the begins with and A while the other one begins with a M, joking so the difference between an atom and a molecules is that, An atom is the smallest unit of matter that retains all of the chemical properties of an element. while Molecules can be described as the smallest particle of an element or a compound, which is capable to exist independently and shows all the properties of the respective substance. Hope this helps :)

Explanation:

Answer:

It's cheap to make, and its recyclable

An example of a function that takes an array of integers and finds the maximum and minimum values, passing them back to the caller is given below.

In this functiοn, the arr parameter is the array οf integers, max_size is the maximum size οf the array, and min_val and max_val are the variables that will stοre the minimum and maximum values, respectively. The functiοn iterates thrοugh the array, updating min_val and max_val whenever a smaller οr larger value is encοuntered. Finally, it returns the minimum and maximum values tο the caller.

\\code\\

def find_min_max(arr, max_size, min_val, max_val):

   if max_size <= 0:

       return

   # Initialize min_val and max_val with the first element of the array

   min_val = arr[0]

   max_val = arr[0]

   # Iterate through the array starting from the second element

   for i in range(1, max_size):

       if arr[i] < min_val:

           min_val = arr[i]

       if arr[i] > max_val:

           max_val = arr[i]

   # Return the updated min_val and max_val to the caller

   return min_val, max_val

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Answer:

Insulin production would decrease.

Explanation:

Insulin and Glucagon work together to balance the sugar levels in the human blood stream. They work together in a negative feedback loop. Glucagon stimulates the liver to release glucose into the bloodstream in a process known as glycogenolysis. Insulin on the other hand is a sugar-lowering hormone.

Therefore, if glucagon secretion were permanently inhibited, insulin production would decrease as there would not be excess blood sugar to be reduced.

Answer:

Insulin production would decrease.

1930 coulombs are required to produce 77.0 g of lithium metal from a sample of molten lithium chloride.

Weight of metal deposited = ECt / 96500, Applied charge= 1930C

Efficiency= 77%

Effective charge=  77/100 (1930)=1486.1C

96500C liberate 1 mole.

1447.5C liberates 1486.1 / 96500  moles = 0.0154 moles .

LiCl-Li, a molten mixture of metallic lithium and lithium chloride, are crucial to the electrolytic reduction of a variety of metal oxides. Researchers have been studying these mixes' distinctive high temperature physical and chemical characteristics for decades.

Lithium metal is primarily made from lithium chloride by electrolyzing a LiCl/KCl melt at 450 °C (842 °F). LiCl is additionally employed in automotive parts as an aluminum brazing flux. As a desiccant, it dries out air streams.

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Answer:

Ion and a Positive Charge. :)

Explanation:

Hope this helps have a nice day! :D

Answer:

The answer is B

Explanation:

Answer:

Hello!

Your answer is B) Ca(HCO3)2!!

Explanation:

Hope this helps you!!

itsMATT04

:>

When HBr reacts with propene by a non-radical route, the correct statement about the mechanism is that "c. Br- adds in a rate-determining step" is incorrect.

Let's break down the options and explain why each statement is either correct or incorrect:

a. H−Br is heterolytically cleaved:
This statement is correct. In the reaction between HBr and propene, the H-Br bond is broken heterolytically, meaning that the bond is cleaved unevenly, resulting in the formation of a Br- ion and a carbenium ion.

b. A carbenium ion forms as an intermediate:
This statement is correct. After the H-Br bond is cleaved, a carbenium ion forms as an intermediate. The carbenium ion is a positively charged carbon atom with three bonds and no lone pairs of electrons.

c. Br- adds in a rate-determining step:
This statement is incorrect. In the reaction mechanism, Br- does not add in a rate-determining step. The rate-determining step is the slowest step in the reaction that determines the overall rate of the reaction. In this case, the rate-determining step involves the formation of the carbenium ion.

d. The major product is 2-bromopropane:
This statement is correct. The major product of the reaction between HBr and propene is indeed 2-bromopropane. The carbenium ion formed in the reaction reacts with the Br- ion, resulting in the addition of Br to the second carbon atom of propene, giving 2-bromopropane as the major product.

To summarize, statement c is incorrect because Br- does not add in a rate-determining step. The correct statement about the mechanism is that "d. The major product is 2-bromopropane."

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The solubility KI is 50 g in 100 g of H₂O at 20 °C. if 110 grams of ki are added to 200 grams of H₂O the solution will be saturated.

Solubility is a condition where the solute is fully dissolved in the solvent. When fully mixed with the solvent.

Given that 50 g of KI is added to 100 g of water at 20 °C it means 100 g of water can dissolve a maximum of 50 g of  KCl.

1 g of water will dissolve an quantity of 0.5 g of  KCl.

To assay for 200 g of water: 200 g of water can disintegrate a maximum of (0.5) x 200 g of  KCl.

The maximum amount of KCl that will dissolve is 100 g

Actualised amount dissolved = 110 g

when Amount dissolved > Maximum solubility limit

110 g > 100 g

Thus,  the solution is saturated.

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Explanation:

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Answer:

mass of iron in grams  = 1.493×\(10^{-23}\) g

Explanation:

Since one mole of anything is equal to 6.022×\(10^{23}\) of that thing, we can apply that to atoms as well. 1 mol of iron = 55.85g. i.e. the molar mass of iron = 55.85g/mol.

To find the number of moles present, we can divide the number of atoms by the number of atoms in 1 mole, i.e Avogadro's Constant (6.022×\(10^{23}\)).

\(\frac{N}{N_{A}} = n\)

∴ n(Fe) = 502/6.022×\(10^{23}\) = 8.3361×\(10^{-22}\) mol of iron

Finally, to find the mass of iron present, we can divide the number of moles by the molar mass.

\(\frac{n}{M}} = m\)

∴ m(Fe) = 8.3361×\(10^{-22}\)/55.85 = 1.493×\(10^{-23}\) g. (4 sig. fig.)

The partial pressure of nitrogen in the gas mixture is 0.875 atm.

We can use Dalton's Law of partial pressures to find the partial pressure of nitrogen. Here's a step-by-step explanation:
1. Calculate the fraction of nitrogen in the gas mixture:
Fraction of nitrogen = 78% (nitrogen) / 100% (total)
Fraction of nitrogen = 0.78
2. Multiply the fraction of nitrogen by the total pressure to find the partial pressure of nitrogen:
Partial pressure of nitrogen = Fraction of nitrogen × Total pressure
Partial pressure of nitrogen = 0.78 × 1.12 atm
3. Calculate the partial pressure of nitrogen:
Partial pressure of nitrogen ≈ 0.87 atm
So, the partial pressure of nitrogen in the gas mixture is approximately 0.87 atm (rounded to two significant figures).

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complete question:

gas mixture contains 78% nitrogen and 22% oxygen. if the total pressure is 1.12 atm, what is the partial pressure of nitrogen?Express your answers in atmospheres to two significant figures.