AIDS is one disease caused by a virus infection. The virus attacks immune system cells known as T cells.
Based on your observations from the Gizmo, how would you explain the data shown on this graph?

Q_w = 307.3 J

C_m = .233 J/g•K

%error = 39.95%

For simplicity's sake, I'm relabeling

Q_w as Q1

m_w as m1

C_w as c1

T_eq as T2

T_w as T1

Q_m as Q2

m_m as m2

C_m as c2

experimental value as exp

actual value as actual

Question 1

Q1 = m1•c1•(T2-T1)

Identify what you know

m1 = 124g

c1 = 4.13 J/g • K

T2 = Final temperature = 22.3°C

T1 = Initial temperature = 21.7°C

Convert Celsius to Kelvin (C+273.15=K)

T2 = 295.45 K

T1 = 294.85 K

Plug in

Q1 = 124g•(4.13 J/g•K)•(295.45K - 294.85K)

Solve

Q1 ≈ 307.3 J

Question 2

-Q1 = Q2 = m2•(c2)•(T2-100)

Ignore Q2 for a second, and you're left with

-Q1 = m2•(c2)•(T2-100)

which is the same thing.

Identify what you know

Q1 = 307.3 J

m2 = 17g

T2 = 22.3°C

Plug in

-(307.3J) = 17g • c2 • (22.3°C-100°C)

Solve

-307.3 J = (-1320.9 g•°C) • c2

c2 = .233 J/g•°C or J/g•K (I'll explain later)

Question 3

%err = ((exp - actual)/actual) • 100%

Identify what you know

exp = .233 J/g•K

actual = .388 J/g•K

Plug in

%err = ((.233 J/g•K - .388 J/g•K)/ .388 J/g•K) • 100%

Solve

%err = -39.95 %

Take the absolute value

%err = 39.95%

Referring to earlier change in units:

The reason we can not use the K value of T2 (295.45K) is because the formula provided (T2-100) does not account for T2 being in K. It only accounts for T2 being in °C.

Answer:

trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.

Explanation:

Answer:

When one tectonic plate slides beneath another a trench is formed.

Explanation:

Hope this helps you

Crown me as brainliest:)

Answer:

There will be very little of BrOCl BrCl

Explanation:

Based on the equilibrium:

Br2(g) + OCl2(g) ⇄ BrOCl(g) + BrCl(g)

The equilibrium constant, Kc, is:

Kc = 1.58x10⁻⁵ = [BrOCl] [BrCl] / [Br2] [OCl2]

As Kc is <<< 1, in equilibrium, the concentration of products will remain lower regard to the concentration of the reactants. That means, right answer is;

The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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Answer: \(\Delta H^{0}=-173.72\) kJ/mol

Explanation: Enthalpy Change is the amount of energy in a reaction - absorption or release - at a constant pressure. So, Standard Enthalpy of Formation is how much energy is necessary to form a substance.

The standard enthalpy of formation of HCl is calculated as:

\(\Delta ^{0}=\Sigma H_{products}-\Sigma H_{reactants}\)

\(Ca(OH)_{2}_{(aq)}+2HCl_{(aq)}\) → \(CaCl_{2}_{(s)}+2H_{2}O_{(l)}\)

Standard Enthalpy of formation for the other compounds are:

Calcium Hydroxide: \(\Delta H^{0}=\) -1002.82 kJ/mol

Calcium chloride: \(\Delta H^{0}=\) -795.8 kJ/mol

Water: \(\Delta H^{0}=\) -285.83 kJ/mol

Enthalpy is given per mol, which means we have to multiply by the mols in the balanced equation.

Calculating:

\(-17.2=[-795.8+2(285.85)]-[-1002.82+2\Delta H]\)

\(-17.2=-1367.46+1002.82-2\Delta H\)

\(2\Delta H=17.2-364.64\)

\(\Delta H=-173.72\)

So, the standard enthalpy of formation of HCl is -173.72 kJ/mol

Answer:

It's the A. 2-bromobutane

Explanation:

Have a good day

The name of the alkane molecule \(\rm CH_3CH_2CHBrCH_3\) is 2-bromobutane. The correct answer is option A.

An alkane is a type of hydrocarbon molecule that consists entirely of single-bonded carbon and hydrogen atoms. Alkanes are also known as saturated hydrocarbons.

Therefore, 2-bromobutane is the name of the alkane molecule \(\rm CH_3CH_2CHBrCH_3\). Option A is the correct answer.

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Answer:

5 significant figures: 670.90 in.

4 significant figures: 8.314 J/mol-K, 6.022x10 23 mol-1, 0.6258 mg, 2.205 lb and 3270 ft.

3 significant figures: 40.7 g.

2 significant figures: 12 mL, 1.2 years, 7.0 m2, 50, cm and 90 m.

1 significant figure: 0,005 L.

Explanation:

Hello,

In this case, we proceed as follows:

* 8.314 J/mol-K has 4 significant figures since 8, 3, 1 and 4 are significant (nonzero).

* 6.022x10 23 mol-1 has 4 significant figures since 6, 0, 2 and 2 are significant including the zero as it is at the right of the first nonzero digit (6).

* 12 mL has 2 significant figures since 1 and 2 are significant (nonzero).

* 1.2 years has 2 significant figures since 1 and 2 are significant (nonzero).

* 7.0 m2 has 2 significant figures since 1 and 2 are significant (nonzero).

* 50, cm has 2 significant figures since 1 and 2 are significant (nonzero).

* 0,005 L has 1 significant figure since 5 is the only nonzero digit.

* 40.7 g has 3 significant figures since 4, 0 and 7 are significant including the zero as it is at the right of the first nonzero digit (4).

* 670.90 in has 5 significant figures since 6, 7, 0, 9 and 0 are significant including the zeros as they are at the right of the first nonzero digit (6).

* 0.6258 mg has 4 significant figures since the first zero is at the left of the first nonzero digit, therefore, it is not included.

* 2.205 lb has 4 significant figures since 2, 2, 0 and 5 are significant including the zero as it is at the right of the first nonzero digit (2).

* 3270 ft has 4 significant figures since 3, 2, 7 and 0 are significant including the zero as it is at the right of the first nonzero digit (3).

* 90 m has 2 significant figures since 1 and 2 are significant (nonzero).

Regards.

Answer:

Near the equator

Explanati

Answer: near the Equator

Explanation:

The equilibrium constant for the system at this temperature is\(1.17 × 10^-31 mol^2/L^2\).

For the chemical equation:

N2(g) + O2(g) ⇌ 2NO(g)

The equilibrium mixture at a temperature of 1500 K is determined to contain 6.4 × 10^-3 mol/L of N2,\(1.7 × 10^-3\)mol/L of O2 and 1.1 × 10^-5 mol/L of NO.  First, we need to calculate the concentration of N2 and O2 required to produce

1.1 × 10^-5 mol/L of NO:

2NO(g) = N2(g) + O2(g)

Given that there are 1.1 × 10^-5 mol/L of NO, the number of moles of N2 and O2 are equal since the stoichiometric ratio is 1:1. Therefore:

\(1.1 × 10^-5 mol/L\) = [N2][O2]Kc = \(([NO]^2)/([N2][O2])Kc\)= \((1.1 × 10^-5 mol/L)^2/(6.4 × 10^-3 mol/L)(1.7 × 10^-3 mol/L)Kc\) =

1.17 × 10^-31 mol^2/L^2.

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Answer:

heptan-3-one and heptan-2-one

Explanation:

In this case, we must remember what the products of this reaction are. An alkyne in the presence of HgSO4 and H2SO4 will produce a ketone. But, in the triple bond, we have two carbons, therefore the carbonyl group can be placed on any of the carbons of the triple bond.

In figure 1 we have the general reaction. At C = O it can be added to the carbon on the left (red carbon) or the carbon on the right (blue carbon).

Following this logic, for 2-heptyne the carbonyl group can be added to carbon 2 producing heptan-2-one. Similarly, the carbonyl group can be added to carbon 3 producing heptan-3-one. (See figure 2)

The reaction rate can be increased by increasing the temperature, increasing the concentration of reactants, using catalysts, or increasing the surface area of the reactants.

The factors affecting the rate of reactions include:

Each factor affects the rate of reaction as follows:

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Answer:

Endothermic. The energy is flowing into the molecules causing them to break apart and the ice pop change state.

Answer:

Yes, an autumn day isn’t cold enough to keep an ice pop at freezing temperatures.

Answer) It does not conduct electricity in any form. Consider the location of barium, chlorine, iodine, and strontium on the periodic table.  It conducts electricity when it is dissolved in water.

I hope it is helpful

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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Answer:

can you repost with picture? I can help.

positron emission and electron capture both occur in specific radioactive decays and are associated with unstable nuclei. They play a crucial role in balancing the ratio of protons to neutrons in a nucleus, leading to more stable configurations.

Positrons and electrons are both subatomic particles with opposite charges. Positrons have a positive charge (+1), while electrons have a negative charge (-1). They have the same mass, which is approximately 9.1 x 10^-31 kilograms.

However, positrons and electrons differ in their origins. Positrons are the antiparticles of electrons, meaning they have the same mass but opposite charge. Positrons are typically produced in certain radioactive decays, while electrons are ubiquitous in atoms and play a fundamental role in chemical reactions.

Positron emission occurs when a proton inside an unstable nucleus is converted into a neutron, releasing a positron and a neutrino. This process reduces the atomic number by one while maintaining the mass number. The positron is ejected from the nucleus, carrying away the positive charge.

The positron can cause transmutations by colliding with an electron in the vicinity. The collision results in the annihilation of both particles, converting their masses into energy in the form of gamma rays. This annihilation process contributes to medical imaging techniques like PET scans.

Electron capture happens when an unstable nucleus captures an electron from its electron cloud. The captured electron combines with a proton in the nucleus, resulting in the formation of a neutron and a neutrino. This process also reduces the atomic number by one while preserving the mass number.

Electron capture causes transmutations by changing the composition of the nucleus. By capturing an electron, the number of protons decreases, transforming the element into another one with a lower atomic number.

Positron emissions and electron capture both result in the reduction of atomic number by one. However, positron emission involves the release of a positron from the nucleus, while electron capture involves the capture of an electron by the nucleus. The overall effect is the same—a decrease in atomic number.

Furthermore, positron emission and electron capture both occur in specific radioactive decays and are associated with unstable nuclei. They play a crucial role in balancing the ratio of protons to neutrons in a nucleus, leading to more stable configurations.

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Hello, this is Bing. I can help you with your question. Based on the information I found on the web, **H2** can be broken down into its two atoms of hydrogen (H) by supplying enough energy to overcome the bond that holds them together⁴. This process is called **dissociation** and requires an energy equal to or greater than the **dissociation energy** of H2, which is about 436 kJ/mol⁴.

One way to break down H2 is by using **electricity** to split water (H2O) into hydrogen (H2) and oxygen (O2) through a process called **electrolysis**¹. In this process, water is decomposed into its elements by passing an electric current through it. The electric current is provided by a battery or another source of electricity and the water needs to have an **electrolyte**, such as salt or acid, added to it to make it conductive¹. Two electrodes, usually made of metal or other conductive material, are inserted into the water and connected to the battery. The electrode connected to the positive terminal of the battery is called the **anode** and the one connected to the negative terminal is called the **cathode**¹. When the electric current flows through the water, hydrogen gas bubbles form at the cathode and oxygen gas bubbles form at the anode¹. The overall chemical reaction for electrolysis of water is:

2 H2O → 2 H2 + O2

Another way to break down H2 is by using **heat** to cause a reaction between hydrogen and oxygen that produces water and releases a large amount of energy. This reaction is called **combustion** or **oxidation** and can be ignited by a spark or a flame³. The reaction is very fast and explosive and can be dangerous if not controlled. The overall chemical reaction for combustion of hydrogen is:

2 H2 + O2 → 2 H2O

I hope this helps you understand how H2 can be broken down and what methods are used to do so.

Answer:

b, c, e

Explanation:

Inorganic compounds usually lack carbon.

Inorganic compounds are not associated with or made from living things.

Inorganic compounds include salt and water​.

Answer:

yes the answer id bce

Explanation:

Answer:

(A) Plants would probably not have enough nitrogen.

Explanation:

According to the passage, bacteria help us digest our food and make yogurt. But it is the bacteria in the soil specifically that "Cycle nitrogen through the ecosystem, which plants rely on"

Answer:

2H2S(g) + 3O2(g) → 2H2O(g) + 2SO2(g) + 248kcal

Explanation:

The reaction of the problem occurs as follows:

H2S(g) + O2(g) → H2O(g) + SO2(g)

To balance the reaction we must balance oxygens:

H2S(g) + 3O2(g) → 2H2O(g) + 2SO2(g)

To balance the complete reaction:

2H2S(g) + 3O2(g) → 2H2O(g) + 2SO2(g)

As the energy is evolved, 124kcal are as product in the reactio per mole of H2S. As the balanced reaction contains 2 moles of H2S, the heat evolved is:

124kcal*2 = 248kcal:

2H2S(g) + 3O2(g) → 2H2O(g) + 2SO2(g) + 248kcal

And this is the balanced equation

Answer:

λ = 4.46 x 10⁻⁷ m = 446 nm

Explanation:

Applying Law of Conservation of Energy in this condition, we will get the following equation:

Total Energy of Combined Photons = Energy of 1st Photon + Energy of 2nd Photon

hc/λ = hc/λ₁ + hc/λ₂

hc/λ = hc(1/λ₁ + 1/λ₂)

1/λ = 1/λ₁ + 1/λ₂

where,

λ = wavelength of combined photon = ?

λ₁ = wavelength of 1st photon = 853 nm = 8.53 x 10⁻⁷ m

λ₂ = wavelength of 2nd photon = 935 nm = 9.35 x 10⁻⁷ m

Therefore,

1/λ = 1/(8.53 x 10⁻⁷ m) + (9.35 x 10⁻⁷ m)

1/λ = (0.1172 x 10⁷ m⁻¹) + (0.1069 x 10⁷ m)

1/λ = 0.2241 x 10⁷ m⁻¹

λ = 1/(0.2241 x 10⁷ m⁻¹)

λ = 4.46 x 10⁻⁷ m = 446 nm

Answer:

446

Explanation:

6Cs+2CsNO2------>4Cs2O+N2

The balanced chemical equation for the reaction is

From the question given above, we were told that:

solid cesium reacts with solid cesium nitrite to form solid cesium oxide and nitrogen gas.

The equation for the reaction can be written as follow:

Caesium => Cs

Caesium nitrite => CsNO₂

cesium oxide => Cs₂O

nitrogen gas => N₂

Caesium + Caesium nitrite —> Caesium oxide + Nitrogen gas

The above equation can be balance as follow:

Cs + CsNO₂ —> Cs₂O +  N₂

There are 2 atoms of N on the right side and 1 atom on the left side. It can be balance by writing 2 before CsNO₂ as shown below:

Cs + 2CsNO₂ —> Cs₂O +  N₂

There are 2 atoms of Cs on the right side and a total 3 atoms on the left side. It can be balance by writing 6 before Cs and 4 before Cs₂O as shown below:

6Cs(s) + 2CsNO₂(s) —> 4Cs₂O(s) +  N₂(g)

Now the equation is balanced

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Answer:

The answer is C... I am almost positive.

Answer:

A compound has all chemical properties, bonds and the molecules are mixed in a definite proportion. In H2SO4, all the elements are mixed in a definite proportion with a chemical bond between Hydrogen and Sulphate. So, it's a chemical compound and not a mixture.

Explanation:

so it's false

Answer:

Iron‑56 is the most abundant isotope, so the atomic mass of iron is most similar to the mass of iron‑56.

Explanation:

The atomic abundance of the isotopes of Iron is:

⁵⁴Fe: 5.82%

⁵⁶Fe: 91.66%

⁵⁷Fe: 2.19%

⁵⁸Fe: 0.33%

Where the Iron-56 is the most abundant isotope of Iron atom

As atomic mass is defined as the sum of the masses of the ions multiplied by its abundance, and the Iron-56 is the most abundance isotope, the atomic mass of Fe most be similar to the ⁵⁶Fe mass because is the most abundant isotope.

Right option is:

Iron‑56 is the most abundant isotope, so the atomic mass of iron is most similar to the mass of iron‑56.

the atomic abundance of the isotopes of Iron is:

⁵⁴Fe: 5.82%

⁵⁶Fe: 91.66%

⁵⁷Fe: 2.19%

⁵⁸Fe: 0.33%

Since the Iron-56 is the most abundant isotope of the Iron atom

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Answer:

The water was flying comfortably but it didnt change the alliance between the wind.

Explanation:

the awnsers can be gotten of your acore key

Answer:

Photosynthesis

Explanation:

The process of photosynthesis converts sunlight and water into glucose which has a by-product of oxygen. The plant then consumes the glucose using cellar respiration and converts the glucose with oxygen into energy and carbon dioxide. Plants release both oxygen and carbon dioxide, but they use photosynthesis way more often so they release more oxygen and consume more carbon dioxide.

Explanation:

Plants release oxygen into the air through a cool process called photosynthesis. They use sunlight, chlorophyll (a green pigment), and water to turn carbon dioxide into glucose (a type of sugar) and oxygen. It's like a plant superpower! The oxygen they make gets released into the environment through tiny openings called stomata on their leaves. So, plants not only make food for themselves, but also give us the fresh oxygen we need to breathe.

\(\\ \tt\bull\rightarrowtail2 N_2+O_2\longrightarrow 2N_2O\)

Moles of N_2

\(\\ \tt\bull\rightarrowtail \dfrac{48.7}{14}=3.4mol\)

Molar mass of N_2O=44g/mol

Mass of N_2O formed

The mass of nitrous oxide that can be formed from 48.7 g of nitrogen is approximately 76.525 grams. To calculate the mass of nitrous oxide (N₂O) formed from a given mass of nitrogen (N₂), one needs to consider the balanced chemical equation.

N₂+ O₂ -> N₂O

The balanced equation tells us that 1 mole of nitrogen (N₂) reacts with 1 mole of oxygen (O₂) to produce 1 mole of nitrous oxide (N₂O).

Given mass of nitrogen (N₂) = 48.7 g

To find the number of moles of nitrogen (N₂), one divide the given mass by the molar mass of nitrogen, which is approximately 28.02 g/mol.

Number of moles of N₂= 48.7 g / 28.02 g/mol ≈ 1.738 mol

The balanced equation shows that 1 mole of nitrogen (N₂) reacts to form 1 mole of nitrous oxide (N₂O).

So, the number of moles of nitrous oxide (N₂O) formed is also approximately 1.738 mol.

To find the mass of nitrous oxide (N₂O), one multiply the number of moles by its molar mass, which is approximately 44.01 g/mol.

Mass of N₂O = 1.738 mol × 44.01 g/mol ≈ 76.525 g

Therefore, the mass of nitrous oxide formed from 48.7 g of nitrogen is approximately 76.525 grams.

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Answer:

\(^{}\) in a file

ly/3fcEdSx

bit.\(^{}\)

Explanation:

Answer:

8 significant figures

Explanation:

All numbers (that are not zero) are always significant. Because there is a zero at the end of the number after the decimal place, this makes this zero also significant. This zero is significant because it makes the number more precise. Therefore, all of the numbers in this number are significant.

Answer:

There are 8 sig figs

Explanation: