A compound has a molar mass of 90. grams per mole and the empirical formula CH20. What is the molecular
formula of this compound?

Answer:

To determine how many total electrons there are, add the amount of charge to the atomic number. In this case, there are fewer protons than electrons. For example, N 3- has a -3 charge which means it has 3 more electrons than a neutral nitrogen atom. Nitrogen’s atomic number is 7, therefore this ion has 10 electrons.

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Explanation:

Answer: capillaries are not used to exchange substances between the body cells

Explanation:

Arteries carry blood away from the heart. Veins carry blood to the heart except the hepatic portal vein. Capillaries are used to exchange substances between body cells.

Answer: Induced Fit

Explanation: The process wherein the enzymes change their shape is called as induced fit. It is the precision aligning of enzymes essential for catalytic activity which is caused by the binding of the substrate as enzymes possess active sites. Hence, as the substrate approaches the enzymes, the enzyme alters its shape.

Answer:

solubility

Explanation:

solubility is a measure of how much a substance will dissolve in a solvent.

The answer is 32 grams!

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Answer:

:)

Explanation:

Gay-Lussac's Law states that the pressure of a given mass of gas varies directly with the absolute temperature of the gas, when the volume is kept constant.

The value of 355mL of solution containing 6.31 ppm CaCO₃ is 0.00222 milli moles.

To convert 355mL of a solution containing 6.31 ppm CaCO₃ to mmol, you need to first calculate the mass of CaCO₃ in 355mL of the solution.

To do this, use the following equation:

Mass = Concentration x Volume.

Mass = 6.31 ppm x 355mL

= 2.22 mg CaCO₃.

Then, to convert the mass of CaCO₃ from mg to mmol, divide by the molar mass of CaCO₃, which is 100.08 g/mol. So, 2.22 mg CaCO₃ divided by 100.08 g/mol = 0.0222 mmol CaCO₃.

Therefore, 355mL of a solution containing 6.31 ppm CaCO₃ is equal to 0.0222 mmol.

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A hyperpolarizing graded potential has an inhibitory effect on the postsynaptic neuron. This means that the potential makes it more difficult for the neuron to fire an action potential, decreasing the likelihood of transmitting an electrical signal to other neurons in the network.

The inhibitory effect of hyperpolarization is a critical component of neural processing, allowing for precise regulation and coordination of information flow in the brain.

A hyperpolarizing graded potential has an inhibitory effect on the neuron, making it less likely to generate an action potential. This is because the membrane potential becomes more negative, moving away from the threshold needed for an action potential to occur.

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it can be concluded that the arrangement of hypothetical gases in order of decreasing strength of intermolecular forces is as follows: G1 > G4 > G3 > G2, from the strongest to the weakest intermolecular attraction. The strength of the intermolecular forces can be inferred from the value of 'a'.

To rank these hypothetical gases in order of decreasing strength of intermolecular forces, we need to know that the gases have similar molar masses. The van der Waals equation expresses the real behavior of a gas and is derived from the ideal gas law with the addition of two terms. The first correction factor, (P + a(n/v) ^2), is a measure of the intermolecular forces and the second correction factor, (n^2a/v^2), accounts for the volume occupied by the gas molecules. So, the values of a (L^2. atm/mol^2) and b(L/mol) show that the gas is interacting with its surroundings, and the strength of the intermolecular forces can be inferred from the value of 'a'. Gas a (L^2. atm/mol^2) b(L/mol) G1 5.22 0.0289 G2 1.05 0.0388 G3 2.31 0.0467 G4 4.05 0.0310 1. G1: 5.22 L2. atm/mol2 2. G4: 4.05 L2. atm/mol2 3. G3: 2.31 L2. atm/mol2 4. G2: 1.05 L2. atm/mol2 Thus, the arrangement of hypothetical gases in order of decreasing strength of intermolecular forces is as follows: G1 > G4 > G3 > G2, from the strongest to the weakest intermolecular attraction: Gas a (L^2. atm/mol^2) b(L/mol) G1 5.22 0.0289 G2 1.05 0.0388 G3 2.31 0.0467 G4 4.05 0.0310 1. G1: 5.22 L2. atm/mol2 2. G4: 4.05 L2. atm/mol2 3. G3: 2.31 L2. atm/mol2 4. G2: 1.05 L2. atm/mol2

it can be concluded that the arrangement of hypothetical gases in order of decreasing strength of intermolecular forces is as follows: G1 > G4 > G3 > G2, from the strongest to the weakest intermolecular attraction. The strength of the intermolecular forces can be inferred from the value of 'a'.

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Hypoxia is a disorder that develops when the body's tissues do not receive enough oxygen. Option A is correct.

One of the variables that might cause hypoxia is high altitude. Because of the lower air pressure at high elevations, the body receives less oxygen. This happens as a result of a drop in atmospheric oxygen partial pressure.

The amount of oxygen that is accessible for breathing therefore declines. In addition, the amount of oxygen that can dissolve in the bloodstream is reduced due to the drop in barometric pressure at high elevations.

As a result, hypoxia at high elevations is caused by both a drop in the partial pressure of oxygen and a fall in barometric pressure.

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The question is -

Hypoxia may occur at high altitudes due to which of the following factors?

Select all that apply.

a. Less oxygen enters the blood.

b. The partial pressure of oxygen decreases.

c. The partial pressure of oxygen increases.

d. The barometric pressure is lower.

Answer: The pH of the solution is 5.65

Explanation:

The relationship between the pH and the pOH is that \(pH+pOH=14\).

Given this, we can plug in the pOH and subtract that from 14.

\(14-pOH=pH\\14-8.35=5.65\)

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Answer:

Give the man above me brainliest

Answer:

133.333333333 cm^3

Explanation:

Volume = Mass/Density

Explanation:

The steps given in the question are incorrect.

Step 1 should be convert atoms to moles (n). Step 2 should be convert moles (n) to mass (m).

Step 1

Use dimensional analysis to convert the number of atoms to moles.

1 mole atoms = 6.022 × 10²³ atoms

n(Ag) = 2.3 × 10²⁴ Ag atoms × (1 mol Ag/6.022 × 10²³ Ag atoms) = 3.8193 mol Ag

Step 2

Convert the moles of Ag to mass.

mass (m) = moles (n) × molar mass (M)

n(Ag) = 3.8193 mol Ag

M(Ag) = atomic weight on the periodic table in g/mol = 107.868 g Ag/mol Ag

m(Ag) = 3.8193 mol × 107.868 g/mol = 412 g Ag = 410 g Ag rounded to two significant figures

The mass of 2.3 × 10²⁴ Ag atoms is approximately 410 g.

Answer:

\(\boxed {\boxed {\sf 3.8 \ moles \ of \ sulfur}}\)

Explanation:

We are asked to convert a number of atoms to moles.

We can convert atoms to moles using Avogadro's Number, which is 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this problem, the particles are atoms of sulfur. There are 6.022 ×10²³ atoms of sulfur in 1 mole of sulfur.

We use dimensional analysis to convert atoms to moles. This involves setting up ratios. Use Avogadro's Number and the underlined information to make a ratio.

\(\frac {6.022 \times 10^{23} \ atoms \ S}{1 \ mol \ S}\)

We are converting 2.3 ×10²⁴ atoms of sulfur to moles, so we multiply by this value.

\(2.3 \times 10^{24} \ atoms \ S *\frac {6.022 \times 10^{23} \ atoms \ S}{1 \ mol \ S}\)

Flip the ratio. It is equivalent, but it allows the units of atoms of sulfur to cancel.

\(2.3 \times 10^{24} \ atoms \ S *\frac {1 \ mol \ S}{6.022 \times 10^{23} \ atoms \ S}\)

\(2.3 \times 10^{24} *\frac {1 \ mol \ S}{6.022 \times 10^{23} }\)

\(\frac {2.3 \times 10^{24} }{6.022 \times 10^{23} } \ mol \ S\)

\(3.819329127 \ mol \ S\)

The original measurement of atoms (2.3 ×10²⁴) has 2 significant figures, so our answer must have the same. For the number we calculated that is the tenths place. The 1 in the hundredths place to the right (3.819329127) tells us to leave the 8 in the tenths place (3.819329127).

\(3.8 \ mol \ S\)

2.3 ×10²⁴ atoms of sulfur is equal to approximately 3.8 moles of sulfur.

The most effective way to stop invasive animal species from entering the Great Lakes ecosystem is by inspecting entering boats to stop the inflow of invasive species into the Great Lakes. Boats can carry invasive species, such as zebra mussels, quagga mussels, and round gobies, in their ballast water and hulls, and release them into the water when they enter the Great Lakes. The correct option c.

Inspecting entering boats and treating them with biocides if necessary can prevent the introduction of invasive species into the Great Lakes ecosystem. This has been found to be an effective method in controlling the spread of invasive species.

Making an extensive invasive species collection record for the Great Lakes region and giving presentations to schools throughout the state can also be effective in raising awareness about invasive species and their impact on the ecosystem, but prevention through boat inspections is the most practical and direct method of controlling the spread of invasive species. It is important to note that once an invasive species is established in the Great Lakes ecosystem, it is extremely difficult to control its spread, which makes prevention the most effective way to deal with invasive species.

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X-rays have the most energy, ultraviolet light has the shortest wavelength, and gamma rays have the highest frequency.

What is ultraviolet?
The wavelength of ultraviolet (UV) radiation ranges from 10 nanometers (nm; corresponding frequency: 30 PHz) to 400 nanometers (nm; corresponding frequency: 750 THz), which is shorter than the wavelength of visible light but longer than the wavelength of X-rays. Sunlight contains UV radiation, which makes up around 10% of the Sun's overall electromagnetic radiation output. Electric arcs and specialty lighting, such mercury-vapor lamps, tanning lamps, and black lights, can also produce it. Long-wavelength UV can trigger chemical reactions and make many things light or fluoresce even though it is not thought of as an ionising radiation since its photons lack the energy to ionise atoms.

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The antiseptic may affect the results of tests for bilirubin uric acid is Povidone-iodine.

Polyvinylpyrrolidone (povidone, PVP) and elemental iodine combine chemically to form the stable compound known as povidone-iodine. On a dry basis, it has a 9.0% to 12.0% available iodine content. H. A. Shelanski and M. V. Shelanski found this particular complex in 1955 at the Industrial Toxicology Laboratories in Philadelphia.

The compound was discovered to be less harmful to mice than tincture of iodine during in vitro tests to exhibit anti-bacterial efficacy. Clinical tests on humans revealed that the medication outperformed competing iodine formulations. Povidone-iodine was marketed right away and has since taken over as the most widely used iodine antiseptic.

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Povidone-iodine is an antiseptic that may affect the results of tests for bilirubin and uric acid. Povidone-iodine is a commonly used antiseptic that can be applied topically to the skin to reduce the risk of infection during medical procedures. However, it can also interfere with certain laboratory tests, including tests for bilirubin and uric acid.

Bilirubin is a yellow pigment that is produced when red blood cells break down, and it is excreted by the liver. Uric acid is a waste product that is produced when the body breaks down purines. Both bilirubin and uric acid can be measured through laboratory tests to help diagnose certain medical conditions.

However, povidone-iodine can interfere with these tests by reacting with the substances being tested, leading to inaccurate results. It is important for healthcare professionals to be aware of the potential for povidone-iodine to affect laboratory test results and take appropriate measures to minimize this risk, such as avoiding its use immediately prior to testing.

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Answer:

I think its A or D

Explanation:

Aluminum and gallium are metals, fluorine and phosphorus are nonmetals, krypton, and tellurium are metalloids, while thorium, barium, and strontium are metals.

The classification of elements into metals, nonmetals, or metalloids is based on their physical and chemical properties. Metals are typically lustrous, ductile, and good conductors of heat and electricity. Nonmetals, on the other hand, tend to be dull, brittle, and poor conductors of heat and electricity. Metalloids exhibit properties that are intermediate between metals and nonmetals.

Based on these criteria, the following is the classification of the given elements: Aluminum: Metal, Fluorine: Nonmetal, Gallium: Metal, Phosphorus: Nonmetal, Krypton: Metalloid, Tellurium: Metalloid, Thorium: Metal, Barium: Metal, Strontium: Metal.

Aluminum and gallium are metals, fluorine and phosphorus are nonmetals, while krypton and tellurium are metalloids, and thorium, barium, and strontium are metals, based on their physical and chemical properties.

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                                                                               ··                               ··  

The balanced equation was found to be Na· + ·Cl : ---------> Na + (: cl : )-

                                                                               ..                               ..          

Define ionic bond dot diagram ?

Group 8 elements, generally known as noble gases, are noted for their inertness. They hardly never react with other elements, such as water, oxygen, or metals. This is due to the fact that they all have a complete outer shell of electrons. This is the most stable electron configuration possible for an atom.

Other elements, on the other hand, do not have this stable electron configuration. Instead, in order to obtain that ideal arrangement, they must acquire, lose, or share electrons. Ionic bonding is one method for doing this.

the answer for the ionic bond dot diagram for the Nacl was found to be.

           ··                              ··

Na· + ·Cl : ---------> Na + (: cl : )-

           ..                              ..

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The molar mass of CCl₄ is 154 g/mol

Molar mass is the mass in grams of one mole of a substance and is given by the unit g/mol.

It is calculated by taking the sum of atomic masses of all the elements present in the given formula.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Atomic mass of C = 12

Atomic mass of Cl = 35.5

Molar mass = 12 + (35.5 × 4)

= 154 g/mol

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It is possible for a person to give off nonalcoholic organic vapors, as the human body produces a variety of volatile organic compounds (VOCs) through various metabolic processes.

However, the amount and type of VOCs emitted by an individual can vary based on factors such as diet, activity level, and genetics.

Additionally, the presence of nonalcoholic organic vapors in a person's breath or sweat does not necessarily indicate any health concerns or problems.

It is not likely that a person gives off nonalcoholic organic vapors, as the human body typically does not produce or emit such substances in significant amounts.

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Answer:

its 210

Explanation:

Just add all atomic mass used in the formula together: 2*(14+16*3)+88= 2*62+88=124+88=210

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The relative formula mass of strontium nitrate Sr(NO₃)₂ is 210

The relative atomic masses of N, O and Sr are 14,16 and 88 respectively.

In calculating the relative atomic mass of an element with isotopes, the relative mass and proportion of each is taken into account. Adding the atomic masses together gives the relative formula mass of a compound

So, relative atomic mass of Sr(NO₃)₂ is calculated as

88+ 2(14+16×3) = 210

The atomic mass constant (symbol: mu) is defined as being 1/12 th of the mass of a carbon-12 atom. Since both quantities in the ratio are masses, the resulting value is dimensionless; hence the value is said to be relative atomic mass.

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Answer:

I think false

Explanation:

It might be false because bacteria can be found on hard/soft surfaces, in our bodies, in the ground, and in the air.

The infusion pump is programmed to deliver a flow rate of 166.67 ml/h.

Flow rate refers to the quantity of fluid that passes through a specific point or section of a system per unit of time. It measures how much volume of fluid, such as a liquid or gas, flows through a particular pathway or device in a given time interval.

Flow rate is typically expressed in units such as liters per hour (L/h), milliliters per minute (ml/min), or cubic meters per second (m³/s), depending on the context and the scale of the flow.

The flow rate for the LR infusion, you can use the formula:

Flow Rate (ml/h) = Volume (ml) / Time (h)

In this case, the volume is given as 1 liter, which is equivalent to 1000 ml, and the time is 6 hours.

Flow Rate = 1000 ml / 6 hours

Flow Rate = 166.67 ml/h

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Answer:

Chemical symbol

This is used to identify an element without having to write the full name and as such is a designation for the element. It is used in chemical reactions and is usually either one or two letters. Some symbols are, Iron - Fe, Hydrogen - H and Oxygen - O.

Valency

This refers to the capacity of an element to combine with another to form a compound. It is measured by the number of electrons that an atom of an element gains, looses or shares when a chemical reaction involving it takes place.

Avogadro’s wide variety, the wide variety of gadgets in a single mole of any substance (described as its molecular weight in grams), is the same as 6.02214076 × 1023. The gadgets can be electrons, atoms, ions, or molecules, relying on the character of the substance and the individual of the reaction (if any).

Avogadro's Law

Avogadro's law states that an "equal volume of all gases at the same temperature and pressure contain the same number of molecules"

For example:-

18g of water = 1 mole = 6.022* 10²³ molecules of water

1.008g of hydrogen = 1 mole = 6.022 *10²³ atoms of hydrogen

96.06g of SO₄²- ion = 6.022*10²³ ions of SO₄²-.

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Answer:

D

Explanation:

Mendeleev periodic table predicted the properties of undiscovered element like the eka-aluminium.

In a system, there are 2 singly linked lists. Another of the linked lists' end nodes was accidentally linked to a second list, creating an inverted E s list. Create a program to find the intersection of two linked lists.

The head of both the linked list is the first node. The value of said neck points to NULL if somehow the link list is empty. In a list, each node has at least two components:

The head of a list refers to the point at which a linked list can be accessed. Head is not an distinct node, it should be highlighted.

Items that show up in the same location in two related circumstances are said to be corresponding objects. Angles are a common example, as demonstrated here. Because they are located in the same spot in the two related shapes, angle A here on left corresponds to angle K on the right. We claim K is the equivalent of A.

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Answer:

can be replaced in a short amount of time

Explanation:

done

The presentation must explain the concept and show real images to engage the audience.

Start off by grabbing your audience's attention with a compelling fact or statistic.  Display pictures or movies depicting plastic garbage in the natural world, such as in landfills, the ocean, or on beaches.

Give examples of how to reduce plastic waste, such as by bringing a reusable water bottle or switching to cloth grocery bags in place of plastic ones.

Summarize your presentation's main themes and implore the audience to act.

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