what is the molar mass of Mg(NO2)2?​

Answer:

Chlorine

Explanation:

Because this will remove dirt and stain and it will kill microorganisms that can cause diseases.

The effects of exposure were more pronounced in fish that had been raised in a less stressful environment, suggesting that environmental conditions can influence the impact of exposure to antidepressants.

1. The class of drugs being investigated in this study is antidepressants. They enter our waterways through excretion by individuals taking the medication, and disposal of unused medication into toilets or sinks that are connected to wastewater treatment plants.

2. C-start is an evasive maneuver that young fish use when they perceive a predator. This is important for larval fish survival because it helps them to avoid being eaten by predators.

3. In this investigation, researchers are testing two hypotheses. The first is that exposure to low levels of antidepressants can affect larval fathead minnows' behavior, and the second is that the effects of exposure will be more pronounced in fish that have been raised in a less stressful environment.

4. The researchers found that exposure to antidepressants at levels found in waterways can have a significant impact on the behavior of larval fathead minnows. Specifically, they found that the fish exposed to antidepressants were less likely to respond to the presence of predators, which could increase their risk of being eaten.

They also found that the effects of exposure were more pronounced in fish that had been raised in a less stressful environment, suggesting that environmental conditions can influence the impact of exposure to antidepressants.

To learn more about antidepressants,

https://brainly.com/question/28209828

#SPJ4

Answer:

Explanation:

To determine the mass of each compound, we need to convert them into units of moles first. We use avogadros number to do this and use the molar mass of the compounds to convert to mass.

3.01 × 1023 molecules H2O ( 1 mole / 6.022x10^23 kg) (18.02 g / 1 mole) = 9.01 g

8.32 × 1020 formula units CaBr2 ( 1 mole / 6.022x10^23 kg) (199.89 g / 1 mole) = 0.28 g

1.93 × 1026 molecules XeF6 ( 1 mole / 6.022x10^23 kg) (245.28 g / 1 mole) = 78610.16 g

Answer:

They all have the same number of molecules or atoms which is 3.011*10²⁴ molecules or atoms.

5 moles of O = 3.011*10²⁴ molecules or atoms

5 moles of N = 3.011*10²⁴ molecules or atoms

5 moles of MgCl2 = 3.011*10²⁴ molecules or atoms

5 moles of C2H3NO = 3.011*10²⁴ molecules or atoms.

Explanation:

a)

5 moles of O = ?

1 mole of any substance is equal to Avogadro's number which is equal to 6.022×10²³molecules or atoms

From the question above,

5 moles of O = 5 × 6.022*10²³ = 3.011×10²⁴atoms or molecules.

b)

5 moles of N

From the same principle or fundamentally stated fact above,

1 mole of any substance = 6.022*10²³molecules or atom

5 moles of N = 5 × 6.024

2*10²³ = 3.011*10²⁴atoms or molecules.

c)

5 moles of MgCl₂

Same principle we used in a and b,

1 mole of any substance = 6.022*10²³ atoms or molecules

5 moles of MgCl2 = 5.0×6.022*10²³ = 3.011*10²⁴ atoms or molecules.

d)

5 moles of C₂H₃NO = ?

1 mole of C₂H₃NO = 6.022*10²³molecules or atoms

5 moles = x molecules or atoms

x = 5 × 6.024

2*10²³ = 3.011*10²⁴ atoms or molecules

What this proves is that no matter the compound, molecule or element, as long as they have equal amount of moles, they'll have the same number of atoms, molecules or particles.

Answer:

a. 3.011x10²⁴ atoms of O in 5 moles.

b. 3.011x10²⁴ atoms of N in 5 moles.

c. 3.011x10²⁴ atoms of MgCl₂ in 5 moles.

d. 3.011x10²⁴ atoms of C₂H₃NO in 5 moles

Explanation:

A mole is defined as the number of atoms in exactly 12.000g of ¹²C.

This number is equal to 6.022x10²³. That means 1 mole is equal to 6.022x10²³.

Thus:

a. O . 5 moles of oxygen (An atom) are:

5 moles O ₓ (6.022x10²³ atoms of O / mole) = 3.011x10²⁴ atoms of O in 5 moles

b. N . Also, 5 moles of nitrogen are:

5 moles N ₓ (6.022x10²³ atoms of N / mole) = 3.011x10²⁴ atoms of N in 5 moles

c. MgCl₂ . Magnesium chloride is a molecule. Again, 1 mole of MgCl₂ contains 6.022x10²³ molecules and 5 moles are:

5 moles MgCl₂ ₓ (6.022x10²³ molecules of MgCl₂ / mole) = 3.011x10²⁴ atoms of MgCl₂ in 5 moles

d. C₂H₃NO. 5 moles of C₂H₃NO are:

5 moles  C₂H₃NO ₓ (6.022x10²³ molecules of  C₂H₃NO / mole) = 3.011x10²⁴ atoms of C₂H₃NO in 5 moles

As you can see, number of molecules of 1 mole doesn't depend on the nature of the substance.

Answer:

E

Explanation:

equal number of protons and different number of atomic masses/neutrons

Answer:

military time

Explanation:

military time

Ca is -2

Be is stabilized

Ba is -4

Sr is -3

so it would be =>  Ba, Sr, Ca, Be

have a wonderful day! :)

The arrangement of the alkaline earth metals from the lowest to highest electronegativity is; Ba< Sr< Ca<Be

Electronegativity refers to the ability of the atoms of an element in a compound to attract the shared electrons of that bond towards itself. It is a property that decreases down the group but increases across the period.

Electronegativity increases across the period as atoms of elements become smaller in size and decreases down the group because of increase in distance between the valence electrons and nucleus.

Since electronegativity decreases down the group, the order of electronegativity from lowest to highest is; Ba< Sr< Ca<Be

Learn more: https://brainly.com/question/2060520

In the Krebs Citric Acid cycle, Half of the original methyl carbon from acetyl- CoA will remain in oxaloacetate after two full cycles.

The Krebs cycle, also known as the citric acid cycle, is a metabolic pathway that is required for the aerobic respiration of all living organisms. The Krebs cycle begins when Acetyl-CoA, which is produced from pyruvate by oxidative decarboxylation, enters the cycle.Oxaloacetate, a four-carbon molecule, accepts Acetyl-CoA and forms a six-carbon molecule known as citrate. The citrate undergoes a series of redox reactions to generate ATP, NADH, and FADH2. As the cycle progresses, the six-carbon molecule is broken down into a four-carbon molecule.

The methyl carbon is retained in the cycle's intermediates, while the rest of the carbon is released as CO2. However, due to the cycle's circular nature, the intermediates generated during the first cycle may be used during the second cycle. Half of the original methyl carbon from acetyl-CoA will remain in oxaloacetate after two full cycles.

To know more about Citric Acid cycle visit:

https://brainly.com/question/31329760

#SPJ11

Answer:

Partial pressure Ne = 340 Torr

Option B

Explanation:

Gases contained in the vessel:

N₂, Ar, He, Ne

One of Dalton's law for gases determine this:

In a mixture of gases contained in a vessel, total pressure of the system must be the sum of partial pressure of each gas.

Total pressure = 1100 Torr

Let's replace:

Partial pressure N₂ + Partial pressure Ar + Partial pressure He + Partial pressure Ne  =  1100 Torr

Partial pressure Ne = 1100 Torr - Partial pressure N₂ - Partial pressure Ar  -Partial pressure He

Partial pressure Ne = 1100 Torr - 110 Torr - 250 Torr - 400 Torr

Partial pressure Ne = 340 Torr

I'm pretty sure it's B :)

An atom is held together by three forces: the strong nuclear force, the electromagnetic force, and the weak nuclear force.

The strong nuclear force is the strongest of the three forces and is responsible for binding the protons and neutrons together in the nucleus of an atom. The strong nuclear force is a short-range force that acts only over a very small distance, and it is strong enough to overcome the repulsive forces between the protons, which are positively charged particles.

The electromagnetic force is the second strongest of the three forces, and it is responsible for binding the electrons to the nucleus of an atom. The electromagnetic force is a long-range force that acts over a larger distance than the strong nuclear force, and it is caused by the attraction between opposite charges (positive and negative).

The weak nuclear force is the weakest of the three forces, and it is responsible for certain types of radioactive decay, such as beta decay. The weak nuclear force is a short-range force that acts only over a very small distance, and it is much weaker than the strong nuclear force and the electromagnetic force.

Overall, the three forces at work that hold an atom together are the strong nuclear force, the electromagnetic force, and the weak nuclear force. These forces act at different ranges and with different strengths, but they all play a crucial role in maintaining the stability and integrity of an atom.

Bar graph is the best type of graph to use if you are trying to compare quantities for four separate options that are not related to the dependent or independent variables and that are not measured over time.

Bar graphs are the type of graph that can be used when the data measurement between different variable are not continuous or not measured over time.

The advantages of bar graphs include the following:

Therefore, Bar graph is the best type of graph to use if you are trying to compare quantities for four separate options that are not related to the dependent or independent variables and that are not measured over time.

Learn more about graphs here:

https://brainly.com/question/14323743

#SPJ1

Number of protons number of electrons neutral atom cation anion neutral atom cation anion neutral atom cation anion number of proton is 7 So, atomic number is 7 atomic number is 7 for N charge.

Number of proton is 7 So, atomic number is 7 atomic number is 7 for N charge = number of proton - number of electron  = 7 - 10  = -3 So, this is anion A .

Protons are the positively charged particles that are inside the nucleus of an atom. The protons are pushed apart by the electromagnetic force but pulled together by the strong force, which is stronger over short distances .

Cations are positively-charged ions (atoms or groups of atoms that have more protons than electrons due to having lost one or more electrons). Anions are negatively-charged ions (meaning they have more electrons than protons due to having gained one or more electrons).

The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).

Electron, proton, neutron are subatomic particles which build the atom. The atom consists of a central nucleus containing neutron and proton. Electrons revolve around the nucleus. Electrons are negatively charged, proton is positively charged and neutron is neutral.

Learn more about protons here:-

brainly.com/question/1252435

#SPJ4

The atomic symbol for the nuclide that decays by alpha emission to form lead-208 (Pb-208) is thorium-232 (Th-232)

Thorium-232 is a radioactive isotope that undergoes alpha decay, which involves the emission of an alpha particle consisting of two protons and two neutrons. Through alpha decay, thorium-232 loses an alpha particle and transforms into a different nuclide. In this case, the decay of thorium-232 leads to the formation of lead-208.

The atomic symbol for lead is Pb, and the number 208 represents the atomic mass of lead-208, which indicates the sum of protons and neutrons in the nucleus. Therefore, the atomic symbol for the nuclide undergoing alpha decay to form lead-208 is thorium-232 (Th-232).

Learn more about alpha emission  from the given link: https://brainly.com/question/24224775

#SPJ11

Answer: Yes it's correct.

Explanation: i hoped that helped!!

Answer:

yes this is correctly done

The body's pH levels vary across different systems, with the stomach having an acidic pH of 1.5-4 and the duodenum having a more alkaline pH of up to 8.5.

Our body's pH levels play a crucial role in maintaining proper functioning and balance. The stomach is responsible for breaking down food through the secretion of gastric acid, which creates an acidic environment necessary for digestion. The pH range of 1.5-4 in the stomach is highly acidic, enabling the enzyme pepsin to break down proteins efficiently. This acidic environment also helps to kill harmful bacteria and pathogens that may enter the body through food or drinks.

On the other hand, the duodenum, which is the first part of the small intestine, has a higher pH level, typically ranging from 7.5 to 8.5. The release of bile and pancreatic juices into the duodenum helps to neutralize the acidic content coming from the stomach. These secretions contain bicarbonate ions that raise the pH level, creating a more alkaline environment. This alkaline environment is essential for the optimal activity of enzymes in the small intestine, enabling the digestion and absorption of nutrients from food.

The contrasting pH levels between the stomach and duodenum highlight the body's ability to maintain a delicate balance. The acidic environment of the stomach is necessary for efficient digestion and protection against pathogens, while the alkaline environment of the duodenum allows for proper nutrient absorption. This pH regulation is a testament to the intricate systems at work in our bodies to ensure overall health and well-being.

If the pH of the stomach and the duodenum were switched, it would disrupt the normal digestive process and could lead to various health complications.

Learn more about the pH

https://brainly.com/question/2288405

#SPJ11

The substance in the diagram that would have a net movement out of the cell is Water.

The substance that will have to have a net movement out of the cell would need to first be in the cell. The only substances in the cell are water, starch, and glucose.

Water will be the most likely substance to have a net movement out of the cell thanks to the process of osmosis which allows water molecules to move from an area of high concentration to an area of low concentration across a semi - permeable membrane. This happens until the concentration gradient is the same across the semi - permeable membrane.

The water in the cell is 90 % which means it is 5 % more than the 85 % water in the beaker. Water would therefore move out of the cell in a net movement until the concentration is the same in the beaker and the cell.

Find out more on movement out of cells at https://brainly.com/question/6843437

#SPJ1

Answer:

160.32 grams of Ca or 160 if rounded

Explanation:

Multiply moles of Ca by the conversion factor (molar mass of calcium) 40.08 g Ca/ 1 mol Ca, which then allows the cancelation of moles, leaving grams of Ca.

4 mol*40.08g/mol = 160.32 grams of Ca

please give thanks by clicking heart button :)

Answer:

\(\boxed {\boxed {\sf 160.32 \ g, \ 160 \ g, \ or \ 200 \ g }}\)

Explanation:

To convert from grams to moles, we must use calcium's molar mass, which can be found on the Periodic Table of Elements.

Now, we can use the molar mass as a ratio or fraction.

\(\frac{40.08 \ g \ Ca}{1 \ mol \ Ca}\)

This fraction can be multiplied by the number of moles, which is 4.

\(4 \ mol \ Ca * \frac{40.08 \ g \ Ca}{1 \ mol \ Ca}\)

When we multiply, the moles of calcium will cancel each other out.

\(4* \frac{40.08 \ g \ Ca}{1}\)

Since the fraction is over 1, we can just remove the denominator and write a simply multiplication equation.

\(4* 40.08 \ g \ Ca\)

\(160.32 \ g \ Ca\)

Depending on the teacher's instructions, the answer can be left as is or rounded.

If we round to the technically correct number of significant figures, it would be 1, because the original measurement of 4 moles has 1 sig fig. This would 200 grams, but that's a large amount to round.

We could also round to the nearest whole number. The 3 in the tenth place tells us to leave the whole number as it is. This would be 160 grams.

The answer could be 160.32 grams, 160 grams, or 200 grams, depending on rounding and significant figures.

Answer:

High temperature increases the number of high energy collisions

Explanation:

Increasing the temperature a reaction takes place at increases the rate of reaction. At higher temperatures, particles can collide more often and with more energy, which makes the reaction take place more quickly.

All of these are not fit for human consumption and shouldn't be used with food, including pewter (which may include some copper, silver, or lead), copper, zinc, and galvanized goods,.

Elegant pewter pitchers are great for pouring iced coffee, crushed ice, and possibly even wine. Every single one of our handcrafted pewter pitchers is created using traditional techniques. They continue to be lead-free, just like all of your other pewter goods.

Today's pewter is safe to use and lead-free. It is mostly formed of tin, with perhaps a little amount of copper and antimony. The items have received certification stating that they are fully lead-free and safe to use with any type of food.

To know more about pewter pitcher visit:

brainly.com/question/29550356

#SPJ4

Answer: Use the pH  scale.

Explanation:

Answer: 3881 g of \(Cl_2\) will be produced along with 109.34 moles of Na

Explanation:

The balanced chemical equation is:

\(2NaCl(s)\rightarrow 2Na(s)+Cl_2(g)\)  

According to stoichiometry :

2 moles of \(Na\) are produced along with = 1 mole of \(Cl_2\)

Thus 109.34 moles of \(Na\) will produced along with=\(\frac{1}{2}\times 109.34=54.67moles\)  of \(Cl_2\)

Mass of \(Cl_2=moles\times {\text {Molar mass}}=54.67moles\times 71g/mol=3881g\)

Thus 3881 g of \(Cl_2\) will be produced along with 109.34 moles of Na

Molality of a solution is defined as the number of moles of solute per kilogram of solvent. The formula for molality is given by the following equation:molality (m) = moles of solute / mass of solvent (in kg)In order to calculate the molality of a 12 percent urea solution, we need to first determine the mass of urea present in the solution.

For such more question on moles

https://brainly.com/question/29367909

#SPJ8

Answer:

i honestly have no idea

Explanation:

Answer:

It's a muscle component near your thighs and hips everyone.

Explanation:

I don't really know what your question is, but uh...

The Hallux is another word for your big toe.

Hope it helps!

Answer:put the rabbits mixed

Explanation:

The correct option is b. at an angle; If a bullet passes through glass and leaves an oval-shaped hole, it entered the glass at an angle.

An oval resembles the form, contour, or shape of an egg.

For instance:

Thus, If a bullet passes through glass and leaves an oval-shaped hole, it entered the glass at an angle.

To know more about the oval-shaped, here

https://brainly.com/question/12597150

#SPJ1

Answer: 8/9

Explanation: took the quiz gang