What was the above piece trying to draw attention to?

Answer:

your answer is A

Explanation:

Answer:

.25

Explanation:

H+=10^-pH

- Hope that helps! Please let me know if you need further explanation.

Answer:

What is the [H3O+] in a solution of pH 0.60?  

Explanation:

No cap

Panting after exercise reduces carbon dioxide levels in the blood, decreasing carbonic acid and helping restore pH balance. At higher altitudes, lower pressure reduces blood's capacity to hold CO₂, potentially leading to decreased carbonic acid concentration but also complicating the body's regulatory mechanisms. Direct dissolution of CO₂ in the blood is also affected by lower pressure.

Effects of Panting and Altitude on Carbonic Acid Concentration:

Panting after heavy exercise increases the expulsion of carbon dioxide, which in turn decreases the concentration of carbonic acid in the blood. This process reestablishes the pH balance, reducing the risk of acidosis caused by the buildup of lactic acid and carbonic acid during strenuous activity. Furthermore, hiking to a higher altitude, where the pressure is lower, would reduce the ability of blood to hold carbon dioxide. This reduction leads to faster removal of carbon dioxide from the blood, which would tend to decrease carbonic acid concentration. However, due to reduced oxygen availability and potential respiratory adjustments such as hyperventilation, the effect on blood pH can be complex at high altitudes.

Lower pressure at high altitudes also affects the direct dissolution of carbon dioxide (CO₂) in blood. At lower pressures, less CO₂ can be dissolved directly, which might necessitate increased respiratory rates to compensate for the reduced ability to carry carbon dioxide away from tissues. Overall, both mechanisms work to ensure the body can maintain a stable internal environment, particularly during varying physical demands and environmental conditions.

Answer:

The U.S. Federal Communications Commission (FCC)

Explanation:

The FCC's Wireless Telecommunications Bureau regulates the safety and policies of Bluetooth and other wireless devices, while the FDA's Center for Devices and Radiological Health oversees the safety of radiation-emitting products, including Bluetooth-enabled devices.

The organization primarily responsible for the regulation of Bluetooth and other wireless devices in the United States is the Federal Communications Commission (FCC), specifically through its Wireless Telecommunications Bureau (WTB). The WTB handles all FCC wireless telecommunications programs and policies, which includes a variety of services such as amateur radio, cellular networks, pagers, Personal Communications Service (PCS), and more. They work to manage and license the radio frequencies and provide policies to ensure the safety and reliability of wireless communication services.

On the other hand, for devices that emit radiation, including Bluetooth-enabled devices, the Center for Devices and Radiological Health (CDRH), a division of the Food and Drug Administration (FDA), oversees the performance and safety of these products. This includes a broad range of items from medical devices to non-medical radiation-emitting products, ensuring that both medical and consumer devices adhere to safety standards.

Answer:

35

Explanation:

I got it wrong and it gave me the right answer.

The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore, 35ml of 15.0 HNO3 must she prepare.

Molarity can be calculated by dividing number of moles of solute by volume of solution in litre. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.

Mathematically,

According to the dilution law,

M₁V₁=M₂V₂

where, symbols have following meaning

M₁ = molarity of stock solution = 15.0 M

V₁ = volume of stock solution =?

M₂ = molarity of dilute solution =1.00M

V₂ = volume of dilute solution = 525 mL

substituting all the given values we get

M₁V₁=M₂V₂

15.0×V₁=1.00×525

V₁=35ml

Therefore, 35ml of 15.0 HNO3 must she prepare.

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Answer:

Ethyn(g) + 5oxygen(g) ------------> 4carbondioxide(g) + 2water(l)

Answer:

The answer is all of the above

A) Center of the solar system

B) hot

C) sunburn

D) solar energy

E) star

F) source of energy for life

G) solar radiation

The study of stars and planets is called cosmology.

The correct answer is all of them.

Sun is the celestial body that gives us the energy to make all the things on the earth.

All the option is justified as follows:-

Hence, the correct option is all of them.

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Answer:

81 x ^16

Explanation:

PEMDAS

You need to do parenthesis

Answer:

Evaporation is the main way water enters the atmosphere.

Explanation:

Evaporation is the main way moisture enters the atmosphere. The amount of evaporation is not the same all of the world. Most evaporation happens over large bodies of water, like oceans and seas. Very little evaporation happens in dry areas, such as deserts. The amount of water on earth is constant. This means it does not change.  

Answer:

the correct answer is B

hope it helps !!!

Answer:

77.9

Explanation:

Answer:

V2 = 389mL

Explanation:

At STP: P=760 torr and T=273K.

To solve this question, we could use Charles' law since both the number of mole and pressure are constant:

V1T1=V2T2

⇒V2=T2×V1T1

⇒V2=273K×425mL/298K=389mL

Answer:

C. a patch of Densely polluted water the size of Texas in the Pacific ocean

Explanation:

All of the Answers are Correct but this describes the Size, location, and the harshness of it.

Answer:

c

Explanation:

Answer:

Groundwater pollution

Explanation:

Pesticides, when sprayed on crop plants, are able to flow below the surface of the ground, reaching water-bearing aquifers, thereby contaminating groundwater, making it unsuitable for both human and agricultural uses.

Final answer:

The type of water pollution produced from chemicals used to kill bugs and weeds is due to pesticides, including insecticides and herbicides, which contaminate water bodies through runoff and leaching into groundwater.

Explanation:

The type of water pollution produced from chemicals used to kill bugs and weeds is primarily due to pesticides, which include insecticides, herbicides, and fungicides. These chemicals often run off during rainfall into nearby rivers, lakes, and infiltrate into groundwater, creating a significant environmental concern. Contaminated water can cause an overgrowth of water plants and algae, which in turn, results in dead zones. Moreover, if humans consume water contaminated with these substances, they can fall ill from a variety of health issues, including cancer, damage to the central nervous system, and developmental defects. Therefore, the chemicals from pesticides and herbicides used in agricultural and garden applications significantly contribute to water pollution.

Answer:

Therefore having the bodies closer together increases the potential energy stored, and conversely increasing their distance reduces the potential energy. In this case the potential energy is always positive, again dropping to zero as the force decreases to zero with the bodies very far apart.

Explanation:

Answer:

A

Explanation:

First, we're given that the atmospheric pressure is 744.8 mmHg. However, this includes the pressure of the Zinc and the pressure of the water; we only want the pressure of the water, so subtract its pressures (23.8 mmHg) from 744.8 mmHg: 744.8 - 23.8 = 721 mmHg.

Now, we can use the ideal gas law: PV = nRT.

- the pressure P is 721 mmHg

- the volume V is 7.80 L

- the moles n of Zinc is what we want to find in order to calculate the mass

- the gas constant R is 62.36 L mmHg / (mol K)

- the temperature T is 25.0°C, or 25.0 + 273 = 298 K

Plug all these in:

PV = nRT

(721 mmHg) * (7.80 L) = n * (62.36) * (298 K)

n ≈ 0.303 mol Zn

We need to convert this to grams, so use the molar mass of Zinc, which is 65.38 g/mol:

[tex]0.303molZn*\frac{65.38g}{1mol} =19.8gZn[/tex]

Thus, the answer is A.

The answer to this problem is A!

Final answer:

Solid iodine is brittle due to weak dispersion forces between iodine molecules in its molecular lattice structure, which when stressed can cause layers to shift and fracture.

Explanation:

Iodine is brittle in its solid state because of its molecular lattice structure, where individual iodine molecules are held together by relatively weak dispersion forces. Despite being the strongest within the halogen group, these forces are not strong enough to allow for flexibility, so when iodine crystals are subjected to mechanical stress, layers of molecules can shift, leading to fracture and resulting in the brittleness observed. Iodine's electron configuration, with -empty valanced orbitals, allows for these molecular interactions to occur in its solid state.

Answer:

im guessing D

Explanation:

hope it helps

Answer:

60 g

Explanation:

Answer:

Diurnal, Semidiural and mixed

Answer:

78.12g of acetylene

Explanation:

Acetylene and calcium hydroxide are produced when H₂O reacts with CaC₂. The reaction is:

2 H₂O + CaC₂ → C₂H₂ + Ca(OH)₂

Where 1 mole of C₂H₂ (acetylene) is produced per mole of CaC₂

Thus, the addition of 3 moles of CaC₂ produces 3 moles of acetylene.

As molecular mass of acetylene is 26.04g/mol, grams of acetylene produced are:

3mol C₂H₂ × (26.04g / mol) = 78.12g of acetylene

Final answer:

By adding 3 moles of calcium carbide, you will produce 78.12 grams of acetylene, as the reaction yields a 1:1 mole ratio and acetylene has a molar mass of 26.04 g/mol.

Explanation:

To answer the question of how many grams of acetylene are produced by adding 3 moles of calcium carbide (CaC₂), we will refer to the chemical reaction:

CaC₂ (s) + 2 H₂O(l) → C₂H₂(g) + Ca(OH)₂ (s).

According to the balanced chemical equation, 1 mole of calcium carbide reacts with water to produce 1 mole of acetylene. Therefore, if you start with 3 moles of calcium carbide, you will produce 3 moles of acetylene. The molar mass of acetylene (C₂H₂) is approximately 26.04 g/mol. Consequently, to find the mass of 3 moles of acetylene we calculate:

3 moles C₂H₂ × 26.04 g/mol = 78.12 grams of acetylene.

So, by adding 3 moles of calcium carbide, you will produce 78.12 grams of acetylene.

Answer:

because it is

Explanation:

Answer:

it is

Explanation:

it just is wym

Answer:

Sun

Explanation:

It Might be raining meaning that the sun isn't shining very brightly.

Answer:

The solar energy might cost a lot in order to install it. As well, there is no solar power at night so you won't have the electricity you need. So like in winter in some place there is no Sun, more specifically the light from the Sun, it is sometimes cloudy all day and there is no light coming from the Sun, so like I said you won't have electricity.

Explanation:

I hope my explanation was understandable :/

Answer:

I would guess B, because trees make oxygen, not carbon dioxcide, and coal is actually a very harmful source of energy.

hope this helps

Explanation:

Final answer:

To slow climate change, it is crucial to reduce energy use, switch to alternative energy sources like solar and wind, and enhance carbon sinks by planting forests.

Explanation:

To slow down climate change, we should focus on several key actions. First, we need to reduce energy use, which could include measures like turning off lights when not in use and driving more fuel-efficient cars. These steps help because much of the electricity and transportation relies on burning fossil fuels, which releases large amounts of carbon dioxide.

Another important action is to switch to cleaner alternative energy sources, such as solar, wind, and geothermal energy. These sources produce little to no carbon emissions compared to fossil fuels like coal, oil, and natural gas. Additionally, increasing the use of technologies like hybrid cars can drastically reduce air pollution and fossil fuel consumption. Moreover, we can combat climate change by enhancing carbon sinks, such as planting more forests which absorb carbon dioxide from the atmosphere.

Answer:

All objectives are correct but C is most suitable

Explanation:

All objectives A, B, and D can be shown in bonding arrangement which is not the case for C.

For example, complex compounds like

Sodium aluminate NaAl(OH)

Answer:

The new pressure will be 74.8 kPa

Explanation:

Step 1: Data given

Volume of the N2 gas = 500 mL = 0.500 L

Temperature = 10.0 °C = 283 K

Pressure = 108 kPa

The volume is increased to 750 mL = 0.750 L

The temperature is increased to 21.0 °C = 294 K

Step 2: Calculate the new pressure

P1*V1 / T1 = P2*V2 / T2

⇒with P1 = the initial pressure = 108 kPa

⇒with V1 = the initial volume = 0.500 L

⇒with T1 = the initial temperature = 283 K

⇒with P2 = the new pressure = TO BE DETERMINED

⇒with V2 = the increased volume = 0.750 L

⇒ with T2 = the increased temperature = 294 K

108 * 0.500 / 283 = P2 * 0.750 / 294

P2 = (108*0.500 * 294) / (283*0.750)

P2 = 74.8 kPa

The new pressure will be 74.8 kPa

D)6 electrons are contained in the three single bonds.

An ammonia molecule can donate and be given up to a few hydrogen bonds. Ammonia clusters are made out of ammonia molecules connected via hydrogen bonds. The hydrogen bond community of ammonia clusters is related to ammonia's homes.

The bond formed via Nitrogen and Hydrogen is a covalent bond because each is non-metal. While those two atoms bond, Nitrogen nonetheless has an excess of 2 valence electrons which might be called the “lone pair”.

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Answer:

Coal

Explanation:

Once it's all been mined, there's no more. It's not like we grow it.