HELP ME PLEASE WILL GIVE BRAINLIEST

Answer:

This took forever T-T

Explanation:

1. The condition of the soil has a big impact on the environment. Good soil helps plants grow, supports different kinds of life, and prevents erosion. It also keeps nutrients in balance and affects the quality of water and air. If the soil is unhealthy or polluted, it can harm plants, animals, and the overall ecosystem.

2. The dodo bird is an example of a species that no longer exists. It used to live on an island called Mauritius. Sadly, people hunted the dodo bird for food and destroyed its habitat. They also introduced other animals that harmed the dodo bird's population. Because of these reasons, the dodo bird became extinct. This affected the environment because the dodo bird played a role in spreading seeds and helping plants grow.

3. The Sumatran orangutan is a species in danger of disappearing. Its biggest threats are losing its home due to forests being cut down for palm oil, illegal hunting, and being taken as pets. People are working to protect the orangutans by preserving their habitat, rescuing and rehabilitating them, and educating communities about their importance.

4. Central Park in New York City is a natural area created in 1857. It was made for people to enjoy nature in the middle of the city. People can do many outdoor activities there like walking, picnicking, and playing sports. The park is also home to various birds and animals, which adds to the city's biodiversity.

5. When a certain environment, like a forest or a desert, is damaged or in danger, it has a big impact on the whole ecosystem. Many different plants and animals depend on each other in these environments. If something harms or destroys their homes, it can lead to the loss of species, disruption of food chains, and less diversity. It can also affect important processes like water and carbon cycles, and even influence the climate. People who rely on these environments for resources and livelihoods are also affected. That's why it's important to protect and take care of these natural areas.

Answer:

Mixing chemicals can be dangerous because you are handling chemicals that are often hazardous.*

Always wear the correct personal protective clothing and equipment when mixing chemicals.

Follow these steps to mix chemicals safely:

Choose a suitable mixing area. The site should be away from plants, people, animals and waterways. It needs to have good lighting and must be well ventilated. There should be first aid equipment and materials to clean up any spills that may occur. Make sure you have lots of clean, fresh water available. The water that you are using in your mixture should be as clean as possible.

Check the product label for the chemical to find out how to mix a solution, including the proportions or volumes needed. If you are unsure, contact the manufacturer or retailer for instructions. I hope it helps. Be safe.

Can you please add a picture of the case??

Answer:

Physical reaction

Explanation:

Since there are no other chemicals in the equation, but the state of the chemical is going from a liquid to a gas, you can conclude that this is a physical reaction.

The standard free energy change for the reaction of 1.78 moles of CO(g) at 308 K, 1 atm would be -36.9 kJ. This reaction is product-favored under standard conditions at 308 K.

To calculate the standard free energy change (ΔG°) for the reaction, we can use the equation:

ΔG° = ΔH° - TΔS°

Given that ΔH°rxn = -206.1 kJ and ΔS°rxn = -214.7 J/K, we need to convert the values to kJ and adjust the sign for ΔS°:

ΔH°rxn = -206.1 kJ

ΔS°rxn = -214.7 J/K = -0.2147 kJ/K

Now we can substitute these values into the equation:

ΔG° = -206.1 kJ - (308 K)(-0.2147 kJ/K)

    = -206.1 kJ + 66.1736 kJ

    = -139.9264 kJ

Since the question asks for the standard free energy change for 1.78 moles of CO(g), we need to calculate the moles of CO(g) in the reaction:

1 mole of CO(g) reacts to form 1 mole of CH₄(g)

1.78 moles of CO(g) will react to form 1.78 moles of CH₄(g)

Therefore, the standard free energy change for the reaction of 1.78 moles of CO(g) at 308 K, 1 atm is -139.9264 kJ.

Based on the negative value of ΔG°, the reaction is product-favored under standard conditions at 308 K.

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To make an appropriate Arrhenius plot of the data, we need to plot the natural logarithm of the rate constant (ln k) against the reciprocal of the absolute temperature (1/T). The slope of the resulting line represents the activation energy of the reaction. For the binding of an inhibitor to the enzyme carbonic anhydrase, the plot would look like a straight line with a negative slope.

Using the given data, we can calculate ln k for each temperature and plot it against 1/T. From the resulting line, the activation energy can be calculated as the negative slope multiplied by the gas constant (R) divided by the Avogadro constant (Na).
Assuming R = 8.314 J mol-1 K-1 and Na = 6.022 x 1023 mol-1, the activation energy for this reaction can be calculated as follows:
Slope = (-2050 - (-2148)) / ((1/289) - (1/313.5)) = 1161 K
Activation energy = slope x (R/Na) = 1161 x (8.314/6.022x1023) = 1.60 x 10-19 J
Therefore, the activation energy for the binding of an inhibitor to the enzyme carbonic anhydrase is 1.60 x 10-19 J, based on the given data. This analysis can be useful in understanding the thermodynamics and kinetics of enzyme-inhibitor interactions.

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Answer:

He will burn 50 meters in 5 days

Explanation:

multiply 10 and 5.  

Answer:

80450 meters

Explanation:

To go from miles to meters multiply by 1609, so do 1609 x 10. Next, take that number times 5 because that is the number of days.

- Let me know if you need further explanation.

Answer:

City B has the larger annual temperature range

Explanation:

This is correct option because generally the northern side of the equator is high in temperature than the southern hemisphere part.

Since the southern side of the equator or Southern Hemisphere, where city A resides will generally have higher altitude or rise, so this creates higher average temperature.

During a chemical reaction, the quantity of heat can only be added or removed in aim to maintain all of the components involved at almost the same temperature. It can be described by Hess's law.

The total enthalpy change for a reaction is the sum of all changes, according to Hess's Law of Constant Heat Summation. The fact that enthalpy is just a state function is demonstrated by this law.

Hess's law can be expressed as:

Δ\(H_{reaction}\) = ∑nΔ\(H_{product}\) - ∑nΔ\(H_{reactant}\).

where, n indicates stoichiometric coefficients, ΔH indicates enthalpy of reaction( reactant and product)

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Answer: 176.18 kJ/mol

Explanation:

You'll have 20.5 g of hydrochloric acid (HCl) left, which is the answer to your query.

Data

HCl = 31.4 g

NaOH = 12 g

insufficient HCl =?

equilibrium in a chemical reaction

NaCl and H2O are produced from HCl and NaOH.

HCl's molar mass is equal to 1 + 35.5 = 36.5 g.

NaOH's molar mass is 40 g (23 + 16 + 1)

Figure out the limiting reactant.

Theoretical yield: 36.5/40 = 0.9125 for HCl/NaOH.

Research yield: HCl/NaOH = 31.4/12 = 2.62

Conclusion

Because of the increasing experimental yield, NaOH is the limiting reactant.

The excess reactant's mass should be determined.

35. 5 g of HCl ———————— NaOH weight 40 g

x ———————— NaOH in 12 g

x = (12 x 36.5) / 40

x = 438 / 40

x = 10.95 grams of HCl

Surplus HCl = 31.4 - 10.95

= 20.5 g

You'll have 20.5 g of HCl left, which is the answer to your query.

The complete question is,

To create aqueous sodium chloride and liquid water, aqueous hydrochloric acid must be combined with solid sodium hydroxide. Consider combining 12.g of sodium hydroxide with 31.4g of hydrochloric acid. Determine the smallest amount of hydrochloric acid that could possibly remain after the reaction. The quantity of significant digits in your response must be accurate.

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Answer:  NaNO3 (Sodium Trioxonitrate (V) )

Explanation:

The equation of the reaction is; HNO3 + NaOH -----> H2O + NaNO3

Answer: its B

Explanation:

The reaction given below can be represented as follows:`

H2PO4– + H2O ⇋ H3O+ + HPO42–

`Base–conjugate acid pair:` H2PO4–` and `HPO42–`

A Brønsted-Lowry acid-base reaction involves the transfer of a proton from one substance to another.

In this reaction, H2PO4– acts as an acid, donating a proton to water.

This produces the conjugate base of H2PO4–, HPO42–, and the conjugate acid of water, H3O+.

A base-conjugate acid pair is defined as two substances that differ only in the presence or absence of a single proton.

In this reaction, the base H2PO4– loses a proton to form its conjugate acid, HPO42–.

Therefore, `H2PO4–` and `HPO42–` is the base–conjugate acid pair.

The term "base-conjugate acid pair" refers to two species with the following characteristics:

They are both conjugates.

They differ by one hydrogen ion.

The dissociation of an acid (HA) results in the formation of a conjugate base (A−) and a hydrogen ion (H+). HA is called an acid, while A− is called a conjugate base.

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The number of planting milkweed  in a region was significantly reduced as a result of environmental change.

That's because incorrect milkweed species have been planted, which raises the possibility of a parasite that causes paralysis in monarch butterflies. The major threat to a North American monarch population has long been habitat degradation in both the United States and Mexico.

Because milkweeds are the host plants of monarch butterfly caterpillars (the female monarchs deposit their eggs there), bees, butterflies, or other beneficial insects can drink the nectar from their blossoms. You may help pollinators and create habitat for monarchs by planting milkweed.

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Answer

Volume of O2 = 1326 L

Explanation

Given:

2C8H18(I) + 25 O2 (g) = 16 CO2(g) + 18 H2O (g)

moles of gasoline = 4.00 mol

Pressure = 0.953 atm

Temperature = 35 C = 308 K

Required: volume of oxygen

Solution

Step 1: use stoichiometry to find the moles of oxygen

The molar ratio between gasoline and O2 is 2:25

Therefore the moles of o2 = 4.0 mol x (25/2) = 50.0 mol

Step 2: Calculate the volume using ideal gas law

PV = nRT

V = nRT/P

V = (50.0 x 0,08206 x 308)/0.953

V = 1326 L

From the following list of Sc, N, Nd, Mt

1) Transition metal in the fourth period Sc

2) A metalloid __

3)a non-metal N

4)a lanthanide Nd.

5)a metal in group 3a or 4a __

What are metalloids?

A metalloid is a particular kind of chemical element with a majority of properties that fall between those of metals and nonmetals, or that are a combination of both. There is no agreed-upon definition of a metalloid and no consensus on which elements qualify as metalloids.

A chemical component that results in a straightforward substance with properties that fall somewhere between those of a conventional metal and a typical nonmetal.

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Answer:pollution clean

Explanation: pollution clean up can help evert damages that have yet to be done while pollution cleanup can't rever the effects it has already done

Type of chemical reaction looking at the given products and reactants in the chemical equation.

When atoms' chemical bonds are established or ruptured, chemical processes take place. The materials that initiate a chemical reaction are known as reactants, while the materials created as a result of the reaction are known as products. Although a chemical reaction is not necessarily a "one-way street," as we'll examine further in the following section, it is usually shown by an arrow between the reactants and products. Some chemical processes just go in one way until all of the reactants have been utilised. It is said that these reactions cannot be stopped. But some reactions can be classified as reversible. Reactions that are reversible have the ability to move both forward and backward.

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Answer:

las plantas

Explanation:

Las plantas son los seres vivos capaces de transformar energía luminosa utilizando agua y dióxido de carbono (CO₂) en energía química en forma de moléculas llamadas carbohidratos. El proceso a través del cual realizan esto se denomina fotosíntesis, y para ello requieren un pigmento de color verde denominado clorofila, el cual es necesario para captar la energía luminosa proveniente del Sol.

Water, a naturally occurring and vital component for life on Earth, is really known chemically as dihydrogen monoxide (DHMO). When consumed in moderation, it is not dangerous.

The claim you made appears to be a well-known internet hoax that has been circulated for a while. It is frequently used in jokes and satire to highlight how quickly false information and fear-mongering can spread.

It is crucial to rely on reliable sources and scientific facts when analyzing information, especially when it comes to health and safety, to address your concern. To assist people in recognizing and avoiding misleading or inaccurate information, it is also crucial to encourage critical thinking and media literacy.

In other words, since dihydrogen monoxide is a fundamental substance required for existence, there is nothing to "repair" in regard to it. Instead, in order to assure accurate and trustworthy knowledge, we should concentrate on information verification and the advancement of scientific literacy.

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Answer:

I'm not really sure. but I think is D

Answer: B, Molar concentration is proportional to the change in the number of moles in a reaction

Explanation: took the test on plato

After 1.845 × 10⁴ years, approximately 3.09% of the original ¹⁴C is still present in the tree trunk.

The question asks about the percentage of original ¹⁴C (carbon-14) that remains after a tree dies and its trunk remains undisturbed for 1.845 × 10⁴ years, given that the half-life of ¹⁴C is 5730 years.

Carbon-14 is an isotope of carbon that undergoes radioactive decay over time. The half-life of ¹⁴C is 5730 years, which means that after each half-life, the amount of ¹⁴C remaining is reduced by half.

To calculate the percentage of ¹⁴C remaining after a certain time, we can use the formula:

Remaining ¹⁴C = Initial ¹⁴C × (1/2)^(time / half-life)

In this case, the time is 1.845 × 10⁴ years, and the half-life is 5730 years. Let's plug these values into the formula:

Remaining ¹⁴C = Initial ¹⁴C × (1/2)^(1.845 × 10⁴ / 5730)

To find the percentage, we can multiply the remaining ¹⁴C by 100:

Percentage of remaining ¹⁴C = Remaining ¹⁴C × 100

Now, let's calculate the remaining ¹⁴C and the corresponding percentage:

Remaining ¹⁴C = 1 × (1/2)^(1.845 × 10⁴ / 5730) ≈ 0.0309

Percentage of remaining ¹⁴C = 0.0309 × 100 ≈ 3.09%

Therefore, after 1.845 × 10⁴ years, approximately 3.09% of the original ¹⁴C is still present in the tree trunk.

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Answer:

A

Thank tou

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Answer:

calcium

Explanation:

you can check on the periodic table

Since the samples are all at room temperature, the substance which is most likely the most dense is: D. silver.

Density can be defined as a ratio of mass to the volume of a physical substance such as chlorine, oxygen, bromine, silver, etc.

Mathematically, the density of a physical substance can be calculated by using this formula:

D = M/V

Where:

At room temperature, the density of the given physical substances in an ascending order are as follows:

In this context, we can reasonably and logically deduce that silver is the most dense among the given physical substances.

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Answer:

i believe it is 17x=(4)x*4 +11*(0)

Explanation:

Answer:

The relative atomic mass of the metal is  207.2 u

Explanation:

Metal chromate

Given that;

1) The mass of fluorine is 14.96% of the metal fluoride

2) 2 Chromium are connected to the metal when the metal chromate, CrO²⁻, is formed

We have;

Number of ions available in the metal =  Cr₂O₇²⁻ = +2 ionic

Molar mass of fluorine = 18.998 g/mole

Ionization of fluorine = -1

Number of moles of fluorine required per metal +2 ion= 2 moles

3) Number of moles of fluorine per mole of compound of the metal fluoride = 2 × moles

Mass of fluorine per mole of compound = 2 × 18.998 = 37.996 grams

Percentage by mass of fluorine = 14.96%

Fluoride

Let the mass of the compound = X

Therefore;

14.96% of X = 37.996 grams

X = 37.996/(0.1496) = 253.984 grams

Therefore the mass of the metal in the compound = 253.984 - 37.996 = Molar mass 215.99 grams

Given that the metal forms a chromate with 2 chromium atoms and a mass of 215.99 grams, the likely candidate is lead, Pb with a molar mass of 207.2 grams and a chromate of Pb(CrO₄)₂.

The fluoride, lead fluoride, F₂

The relative atomic mass of lead is 207.2 u

The mole is used to measure small particles like atoms and molecules.  The 4 moles of silver is equivalent to \(\bold{2.408 x 10^2^4 }\) atoms.

Given here,

The number of atoms

\(\bold{2.408 x 10^2^4 }\)

Number of moles = ?

1 mol of substance = \(\bold{ 6.02 x10^2^3}\)

Hence,

moles of silver,

\(\bold {= \dfrac {2.408 x 10^2^4 } { 6.02 x10^2^3} }}\\\\\bold {= 4 mol}\)

Therefore, the 4 moles of silver is equivalent to \(\bold{2.408 x 10^2^4 }\) atoms.

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Answer:

calcium.

Explanation:

because of

thanks

Explanation:

so for this one u need to remember this equation and use it to find out moles= mass /mr . Mr of helium is 4

so moles= mass /mr

=100/4

=25 moles

hope this make sense:)