select all correct answers! the primary cause of recent global warming is believed to be . group of answer choices chemical reactions in the atmosphere that are driven by solar heat increased burning of fossil fuels increased levels of atmospheric pollution depletion of the rain forests

Answer:

compression

Explanation:

Hope it helps!!!!!!!!!!

Molarity of a solution is 2.44 M.

Given data:

Mass of Strontium oxide (SrO) = 65.7 g.

Volume of water = enough to make a 260.0 mL

Solution:

Molarity can be calculated by using the formula:

Molarity (M) = Number of moles of solute / Volume of solution in liters.

To find the molarity of a solution, we need to calculate the number of moles of solute in it.

Number of moles of solute = Mass of solute / Molar mass of solute.

Molar mass of strontium oxide (SrO) = (1 × 87.62) + 16 = 103.62 g/mol.

Number of moles of strontium oxide (SrO) = 65.7 g / 103.62 g/mol = 0.633 moles of SrO.

The volume of solution in liters = 260.0 mL / 1000 mL/L = 0.2600 L.

So, the Molarity of the solution formed by dissolving 65.7 g of strontium oxide (SrO) in enough water to make a 260.0 mL solution is: Molarity (M) = Number of moles of solute / Volume of solution in liters.

M = 0.633 moles / 0.2600 L = 2.44 M.

Therefore, the Molarity of a solution formed by dissolving 65.7 g of strontium oxide (SrO) in enough water to make a 260.0 mL solution is 2.44 M.

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Answer:Copper is a chemical element with symbol Cu and atomic number 29. Classified as a transition metal, Copper is a solid at room temperature.So copper is a pure substance in any form (only copper atoms). ... A mixture of different kinds of metal atoms is called an "alloy" if they are mixed on an atomic scale.

During the citric acid cycle, oxidative steps are coupled to the oxidation of electron carriers.

In the citric acid cycle, acetyl-CoA is oxidized to CO2, generating NADH and FADH2 as electron carriers. These electron carriers then enter the electron transport chain (ETC), where they are oxidized to generate ATP through oxidative phosphorylation.

The ETC is a series of redox reactions that occur in the inner mitochondrial membrane. During these reactions, the electrons carried by NADH and FADH2 are transferred to a series of electron carriers, ultimately leading to the reduction of oxygen to water and the generation of a proton gradient across the membrane. The proton gradient is then used to drive ATP synthesis through the ATP synthase enzyme.

Therefore, the oxidative steps in the citric acid cycle are coupled to the oxidation of electron carriers, which then drive ATP synthesis through oxidative phosphorylation in the electron transport chain.

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B) 20g/cm³

Hi there !

density formula

d = m/V

volume formula

V = l×w×h

V = 3cm×2cm×1cm = 6cm³

d = 120g/6cm³

d = 20g/cm³

Good luck !

Answer:

20g

Explanation:

Answer:

friction, conduction, and induction

Explanation:

The formation of solid magnesium chloride (MgCl₂) by the reaction between chlorine gas (Cl₂) and magnesium metal (Mg) at high temperatures is classified as a synthesis reaction or a combination reaction.

Synthesis reactions involve the combination of two or more substances to form a single product. In this case, chlorine gas and magnesium metal combine to produce magnesium chloride as the sole product.

The balanced chemical equation for this synthesis reaction is:

Mg + Cl₂ ⇒ MgCl₂

Hence, the reaction between chlorine gas and magnesium metal to form solid magnesium chloride indicates a synthesis reaction, as the elements combine to form a compound.

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(a) To get the pH of the media to 5.8, you would add NaOH solution. NaOH is used as a basic solution, and when it is added to a solution, it will increase the pH of the solution.

(b) The molecular weight of BA is 225.3. To prepare a 1M solution, you would have to weigh out 225.3 grams of BA.(c) To convert a 1M solution of BA to mg/mL, you can use the following equation: 1 mole = molecular weight in grams; 1000 millimoles = 1 mole. So, 1 M = 1000 mg/mL. Therefore, a 1M solution of BA is equivalent to 1000 mg/mL .(d) To convert a concentration of 1000 mg/mL .

Therefore, to calculate the weight required for a 5 mM solution, use the following formula :Mass of BA = molarity × volume × molecular weight= 5 × 0.001 × 225.3= 1.1265 grams(f) To convert a concentration of 5 mM to mg/mL, we use the following formula: Concentration (mg/mL) = (Concentration (mM) × Molecular weight) / 1000= (5 × 225.3) / 1000= 1.1265 mg/mL(g)

To convert a concentration of 1.1265 mg/mL to mg/L, we multiply by 1000, so 1.1265 mg/mL = 1126.5 mg/L.(h) Given that the stock solution of BA is 5 mM and the working solution is 0.2 mg/mL.

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The third energy level contains a maximum of 18 electrons. It can be filled with the following elements: Sodium (Na), Magnesium (Mg), Aluminum (Al), Silicon (Si), Phosphorus (P), Sulfur (S), Chlorine (Cl), and Argon (Ar).

Sodium, Magnesium, and Aluminum are classified as metals while Silicon, Phosphorus, Sulfur, Chlorine, and Argon are non-metals.On the other hand, Boron is the element that contains the first p electron.Boron, the chemical element with the symbol B and atomic number 5 is classified as a metalloid.

It is a nonmetal or semimetal because it has physical and chemical properties of both metals and nonmetals. Its electron configuration is 1s²2s²2p¹, meaning that it has two electrons in the 1s orbital, two in the 2s orbital, and one electron in the 2p orbital. It contains one valence electron in its outermost shell (2s²2p¹) which can be shared with other atoms to form compounds.

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2-methyl-2-propanol (option d) cannot be made by reduction of a ketone or aldehyde.

2-methyl-2-propanol is a tertiary alcohol, which means that the carbon atom attached to the -OH group is also attached to three other carbon atoms. Reduction of a ketone or aldehyde requires the presence of a hydrogen atom on the carbon atom attached to the carbonyl group, which can be reduced to form the -OH group in the alcohol product.

In 2-methyl-2-propanol, there is no hydrogen atom on the carbon atom attached to the -OH group, which means that it cannot be produced by the reduction of a ketone or aldehyde.

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Answer: Moving water causes soil and rock erosion. Moving water carries bits of rock and soil and deposits them in other places. It moves rocks and soil from mountaintops to flat land. Rivers carry rock and soil and deposit them far away from where they were.

Explanation:

Answer:

Well, moving water will cause soil and rock erosion.  it also will carry bits of rock and soil and will deposit them into the other places. It will move the rocks and the soil from the mountaintops to the flat land. Rivers can also carry rock and soil and deposit them far away from where they were.

The correct coefficients to balance the equation are:

\(2C_2H_6 + 7O_2\) → \(4CO_2 + 6H_2O\)

We can determine the coefficients by making sure that the number of atoms of each element is the same on both sides of the equation.

On the left side of the equation, there are 2 carbon atoms and 6 hydrogen atoms. On the right side, there are 4 carbon atoms and 6 hydrogen atoms. To balance the carbons, we need a coefficient of 2 in front of \(CO_2\). To balance the hydrogens, we need a coefficient of 3 in front of \(H_2O\).

Now we have:

\(C_2H_6 + 7O_2 = 2CO_2 + 3H_2O\)

To balance the oxygen atoms, we need a coefficient of 7/2 (which can be simplified to 3.5) in front of \(O_2\). However, we can't have a fractional coefficient in a balanced chemical equation. So, we can multiply the entire equation by 2 to get rid of the fraction:

\(2C_2H_6 + 7O_2 = 4CO_2 + 6H_2O\)

Now the equation is balanced, with 2 carbon atoms, 6 hydrogen atoms, and 14 oxygen atoms on both sides.

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Aldosterone is the hormone that increases K+ secretion into the urine.

Aldosterone is a steroid hormone produced by the adrenal glands. Its primary function is to regulate electrolyte balance in the body, including the excretion of potassium (K+) in the urine. Aldosterone increases the activity of the Na+/K+ ATPase pump in the distal tubules of the kidneys, which leads to the reabsorption of sodium ions (Na+) and the secretion of potassium ions (K+) into the urine. This process helps to maintain proper electrolyte balance in the body. In contrast, atrial natriuretic peptide, erythropoietin, and thyroid hormone do not have direct effects on potassium excretion in the kidneys.

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Answer:

Couldn't figure out how to edit the other one to attach the image, but here is it with the labels. Also put the same explanation down below so you don't have to go to the other if you wanted to look at it in conjunction with the image.

Explanation:

Mass extinctions are periods of time where the organisms are essentially wiped out in an extremely brief period of time. You can see how the species just drops off. Adaptive radiation occurs when there is a diversification of a group of organisms as evident by the rise in the number of marine animal groups shown by the bracketed area.

Chemical disequilibrium is likely to be present in any system where the forward and reverse reactions are not in balance.

This can occur in a variety of situations, such as when the reactants are not present in the correct proportions, when the reaction conditions are not ideal, or when there are external factors affecting the reaction. For example, in a chemical reaction where one product is constantly being removed from the system, the reaction may never reach equilibrium.

Similarly, in a reaction where the temperature or pressure is constantly changing, the equilibrium may shift in one direction, leading to a chemical disequilibrium. Ultimately, chemical disequilibrium occurs when a reaction is not able to maintain a stable equilibrium state. Chemical disequilibrium is likely to be present in environments where reactions are ongoing and not yet in a stable state. These situations can be found in systems experiencing changes in temperature, pressure, or concentrations of reactants and products. Examples include volcanic areas, hydrothermal vents, or chemical industries where continuous production or consumption of reactants occurs. The presence of chemical disequilibrium provides opportunities for further reactions to take place, leading to new products and potential energy releases. Understanding these environments can offer insights into various natural processes and technological applications.

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Answer:it’s E cause it yeshp

Answer:

D: Chlorine( I may be wrong my chemistry year was a nightmare)

The awnser is chlorine (Cl) trust me

Answer:

True

Explanation:

Answer:

5

Explanation:

Items that are less useful, relevant, or efficient are likely to be modified or discarded more frequently than those that are deemed more valuable or necessary.

It is more probable that something will be changed or abandoned when it becomes antiquated, ineffective, or does not satisfy the demands of its users. This could be the result of developments in technology, modifications in society's values or tastes, or just the passage of time. Less value or required things or ideas will probably be changed or rejected more frequently since they are not as crucial to success in general or day-to-day life. To ensure their future relevance and usefulness, those that are highly appreciated or thought necessary will probably be kept or improved upon. This idea may be applied to a variety of things, including corporate procedures, cultural customs, and home appliances.

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The volume of HCl that is required to prepare the solution of 0.1M of 100ml from a solution of 2M of molarity is 5ml.

The given molarity of the solution of HCl is 2M and the volume of solution that is needed to prepare is 100ml with the molarity 0.1M. Now it is required to find the volume that is to be needed to prepare the solution of 100ml with 0.1M. For that the following formula for dilution is used,

M₁V₁ = M₂V₂

By substituting the given values into the formula of dilution, we get

2 x V₁ = 0.1 x 100

2V₁ = 10

V₁ = 10/2

V₁ = 5ml

Therefore, 5ml of HCl is required to prepare a solution of 0.1M of solution of 100ml.

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Answer:

Hydrogen bond

Explanation:

Hydrogen bond is formed between H, O, N

The  strongest type of interaction that occurs between the atom within the circled areas of the two molecules represented  in the image is hydrogen bonds.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

1.62 * 10^-11 J

Explanation:

Nitrogen-14 nucleus has seven neutrons and seven protons. So;

Total mass of protons = 7(1.00728 amu)

Total mass of neutrons = 7(1.00866 amu)

Total mass of nucleons = 7(1.00728 amu) + 7(1.00866 amu)= 14.11158 amu

Mass of Nitrogen-14 nucleus = 14.00307 amu

Mass defect = 14.11158 amu - 14.00307 amu = 0.10851 amu = 1.801852171 * 10^-28 Kg

Binding energy = Δmc^2

Where;

Δm = mass defect

c = speed of light

Binding energy = 1.801852171 * 10^-28 Kg * (3 * 10^8)^2

Binding energy = 1.62 * 10^-11 J

Answer:

0.10851 amu

1.62

-11

Explanation:

Yw

Approximately 12.45 grams of solid silver chromate will precipitate when 150 mL of 0.500 M silver nitrate solution is added to excess potassium chromate.

To determine the number of moles of AgNO3 present in 150 mL of a 0.500 M AgNO3 solution, we can use the formula:

moles = concentration × volume

Given:

Concentration of AgNO3 solution = 0.500 M

Volume of AgNO3 solution = 150 mL

First, we need to convert the volume from milliliters (mL) to liters (L) since the concentration is given in moles per liter (M).

1 L = 1000 mL

Therefore, the volume of the AgNO3 solution in liters is:

150 mL × (1 L / 1000 mL) = 0.150 L

Now we can calculate the moles of AgNO3 using the formula:

moles = concentration × volume

moles = 0.500 M × 0.150 L

moles = 0.075 mol

So, there are 0.075 moles of AgNO3 present in 150 mL of the 0.500 M AgNO3 solution.

Now, let's proceed to determine how many grams of solid silver chromate (Ag2CrO4) will precipitate when the AgNO3 solution reacts with excess potassium chromate (K2CrO4).

From the balanced chemical equation:

2AgNO3(aq) + K2CrO4(aq) → Ag2CrO4(s) + 2KNO3(aq)

We can see that the molar ratio between AgNO3 and Ag2CrO4 is 2:1. Therefore, for every 2 moles of AgNO3, we will form 1 mole of Ag2CrO4.

Since we have 0.075 moles of AgNO3, we can calculate the moles of Ag2CrO4 formed:

moles of Ag2CrO4 = 0.075 mol / 2 = 0.0375 mol

To determine the mass of Ag2CrO4, we need to multiply the moles by its molar mass. The molar mass of Ag2CrO4 is calculated by summing the atomic masses of each element in the compound:

Ag2CrO4 = 2(Ag) + 1(Cr) + 4(O) = 2(107.87 g/mol) + 1(52.00 g/mol) + 4(16.00 g/mol) = 331.87 g/mol

mass of Ag2CrO4 = moles of Ag2CrO4 × molar mass of Ag2CrO4

mass of Ag2CrO4 = 0.0375 mol × 331.87 g/mol = 12.45 g

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There are 12.044 × 10^23 oxygen molecule present in 2mole of oxygen molecule.

According to the context, the word may as well as may not encompass ions that meet this requirement. A molecule is a collection of two as well as more atoms linked together by the attractive forces described as chemical bonds.

The lowest unit into which a substance could be divided while still being the same substance would be a molecule. It is composed of two as well as more atoms which are chemically bonded to one another.

1 mole of oxygen = 1 O2 molecule

2 mole = 2 O2 molecule = 2 × 6.022 × 10^23 molecule = 12.044 × 10^23 molecule

Thus, 2 mole of oxygen will have 12.044 × 10^23 molecule

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The sample will degrade at a rate of 151.74 decays per minute in 1000 years and 10.24 decays per minute in 50000 years, respectively.

To calculate the decay rate of the carbon sample in Part A and Part B, we need to consider the half-life of carbon-14. The half-life of carbon-14 is approximately 5730 years.

Part A:

To find the decay rate of the sample in 1000 years, we need to determine the number of half-lives that have passed in 1000 years. We can do this by dividing the time elapsed (1000 years) by the half-life of carbon-14 (5730 years):

Number of half-lives = 1000 years / 5730 years ≈ 0.1748

Since each half-life halves the initial quantity, we can calculate the remaining fraction of the sample after 0.1748 half-lives:

Remaining fraction = (1/2)^(0.1748) ≈ 0.9391

The decay rate is given as 161.5 decays/minute, so we can calculate the decay rate of the sample in 1000 years:

Decay rate in 1000 years = Remaining fraction * Initial decay rate

= 0.9391 * 161.5 decays/minute

≈ 151.74 decays/minute

Therefore, the decay rate of the sample in 1000 years is approximately 151.74 decays/minute.

Part B:

To find the decay rate of the sample in 50000 years, we need to determine the number of half-lives that have passed in 50000 years:

Number of half-lives = 50000 years / 5730 years ≈ 8.7257

Using the same logic as in Part A, the remaining fraction after 8.7257 half-lives is:

Remaining fraction = (1/2)^(8.7257) ≈ 0.0632

Now we can calculate the decay rate in 50000 years:

Decay rate in 50000 years = Remaining fraction * Initial decay rate

= 0.0632 * 161.5 decays/minute

≈ 10.24 decays/minute

Therefore, the decay rate of the sample in 50000 years is approximately 10.24 decays/minute.

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That 1500 kJ of energy were transferred to water at 20.0°C. Heat capacity (c) for liquid water is 4.18 J/g C​. mass of water could be brought to the boiling point is 4485 g.

given that :

heat energy = 1500 kJ

heat capacity , c = 4.18 J/g °C

initial temperature = 20.0°C

boiling of water ,final temperature = 100 °C

Q = mcΔT

m = Q / (cΔT)

m = 1500 / ( 4.18 × ( 100 °C - 20 °C )

m = 1500 / 334.4

m = 4.485 kg = 4485 g

Thus, That 1500 kJ of energy were transferred to water at 20.0°C. Heat capacity (c) for liquid water is 4.18 J/g C. ​mass of water could be brought to the boiling point is 4485 g.

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