Science has had no negative impacts on society. Please select the best answer from the choices provided T F

Answer:

0.633L

Explanation:

Answer and Explanation: To get the volume of ethanol, as asked for in the question, we simply divide the given mass of ethanol by the density of ethanol, and convert this calculated volume from mL to L : 500g(mL0.789g)(L1000mL)=0.633L 500 g ( m L 0.789 g ) ( L 1000 m L ) = 0.633 L .

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:

Magnesium loses it's two electrons and Oxygen gains two electrons. Magnesium is now a cation and Oxygen is now an anion. Both become stable.

Explanation:

The type of electron transfer which happens between the Mg and O atom is a complete transfer of electrons from the Mg atom to the O atom in an ionic bond.

The most electropositive electron usually is usually the donor while the most electronegative elements is the acceptor.

As evident in the case above;

Ultimately, an ionic bond is formed between the Mg and O atoms.

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Marie needs to be aware of the time period and element group for each box.

In terms of reactivity, the metals that are listed in the periodic table's lower left corner are the most active. For instance, the elements lithium, sodium, and potassium all react with water.

How does this contribute to the understanding of the variations in metal reactivity within a group. The metals near the bottom are more reactive than those at the top because the valence electrons of the bigger atoms are farther from the nucleus and simpler to extract.

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Answer:

:)

Explanation:

The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.

Answer:

Explanation:

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) is:

HCl(aq) + NaOH(s) → NaCl(aq) + H2O(l)

From the balanced equation, we can see that one mole of hydrochloric acid reacts with one mole of sodium hydroxide to produce one mole of sodium chloride and one mole of water.

First, we need to determine which reactant is limiting, i.e., which reactant is completely consumed in the reaction. To do this, we need to compare the number of moles of each reactant, using their respective molar masses:

Molar mass of HCl = 1.008 g/mol (atomic weight of hydrogen) + 35.45 g/mol (atomic weight of chlorine) = 36.46 g/mol

Molar mass of NaOH = 22.99 g/mol (atomic weight of sodium) + 16.00 g/mol (atomic weight of oxygen) + 1.008 g/mol (atomic weight of hydrogen) = 39.99 g/mol

Number of moles of HCl = mass / molar mass = 30.0 g / 36.46 g/mol ≈ 0.823 mol

Number of moles of NaOH = mass / molar mass = 14.3 g / 39.99 g/mol ≈ 0.358 mol

Since the stoichiometric ratio between HCl and NaOH is 1:1, NaOH is the limiting reactant because it has fewer moles than HCl.

Therefore, we can calculate the maximum mass of NaCl that can be produced by the reaction using the number of moles of NaOH:

Number of moles of NaCl produced = number of moles of NaOH used in the reaction = 0.358 mol

Mass of NaCl produced = number of moles of NaCl produced x molar mass of NaCl

Molar mass of NaCl = 22.99 g/mol (atomic weight of sodium) + 35.45 g/mol (atomic weight of chlorine) = 58.44 g/mol

Mass of NaCl produced = 0.358 mol x 58.44 g/mol = 20.9 g

Therefore, the maximum mass of NaCl that can be produced by the reaction is approximately 20.9 g

Answer:

entire, increasing, decreasing

Explanation:

The EM Spectrum is the entire range of EM waves in order of increasing frequency and decreasing wavelength.

Answer:

the molar mass of Mg(NO3)2

the mass of the water added the density of the Mg(NO3)2

the volume of water used

Calculate the number of moles of Mg(NO3)2 used to make up this solution. 42.0 g of Mg(NO3)2 is equivalent to___ mol Mg(NO3)2.

Now calculate the molarity of the solution, giving your answer to the correct number of significant digits.

Molarity of Mg(NO3)2 = ___M

Answer:

decreases

Explanation:

Melting is the process of turning solid materials into liquids by introducing heat. If the mass of a stick of butter decreases then no mass was created when it melted.

Melting is the process of a solid changing from a solid to a liquid when heated to a specific temperature. The set temperature at which a solid begins to transform into a liquid is known as the melting point.

A substance will change from a solid to a liquid when the temperature is raised to its melting point. since of this, the substance's volume will grow since its molecules will be spaced more apart.

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a)There are 0.45 moles of HNO₃ in the bottle.

b)Approximately 13 ml of the solution are required for the reaction.

a. To find the number of moles of HNO₃  in the bottle, we can use the formula:

moles = concentration (M) x volume (L)

Given that the concentration of the nitric acid solution is 6.0 M and the volume is 75.0 ml, we need to convert the volume to liters:

75.0 ml = 75.0 ml x (1 L/1000 ml) = 0.075 L

Now, we can calculate the number of moles:

moles = 6.0 M x 0.075 L = 0.45 moles

So, there are 0.45 moles of HNO₃  in the bottle.

b. To determine the volume of solution required for 5.00 g of HNO3, we need to use the molar mass of HNO3 to convert grams to moles:

moles = mass (g) / molar mass (g/mol)

Given that the molar mass of HNO₃  is 63.01 g/mol and the mass required is 5.00 g, we can calculate the number of moles:

moles = 5.00 g / 63.01 g/mol ≈ 0.079 moles

Now, we can use the concentration to find the volume:

volume (L) = moles / concentration (M)

volume (L) = 0.079 moles / 6.0 M ≈ 0.013 L

Finally, we need to convert the volume to milliliters:

volume (ml) = 0.013 L x (1000 ml/1 L) ≈ 13 ml

So, approximately 13 ml of the solution are required for the reaction.

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According to the ideal gas law, when the temperature of a gas doubles, its volume doubles as well (Option B).

The ideal gas law relates the pressure, volume, number of moles and temperature of an ideal gas.

Let's consider the equation of the ideal gas law.

P . V = n . R .T

V = n . R . T / P

As we can see, there is a direct relationship between the volume and the temperature. Thus, if the temperature doubles, the volume will double as well.

According to the ideal gas law, when the temperature of a gas doubles, its volume doubles as well (Option B).

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Explanation:

the definition of genuine:

genuinly means honestly or truley

Answer:

number of protons

The atomic number helps people identify elements according to the number of protons one atom of the element has. It essentially defines the element. While having a neutral charge, it also provides the number of electrons the element has (in one atom).

hope you understand please give brainliest

Answer:

→ number of protons.

Explanation:

let's take an example of hydrogen:

\( \dashrightarrow \: { \boxed{ \tt{ {}^{1} _{1} H}}}\)

hydrogen has atomic number 1, because it has only one proton

Answer:

A

Explanation:

Answer:

-23.333 °C

Explanation:

(-10°F − 32) × 5/9 = -23.33°C

Answer:

The answer is

Explanation:

To convert from degree Celsius to degrees Fahrenheit we use the formula

\( \degree C = (\degree F - 32) \times \frac{5}{9} \\ \)

Where

°C is the temperature in degree Celsius

°F is the temperature in degree Fahrenheit

From the question

°F = - 10°F

It's equivalent in degree Celsius is

\(°C = ( - 10 - 32) \times \frac{5}{9} \\ = - 42 \times \frac{5}{9} \\ = - \frac{70}{3} \: \: \: \: \: \: \: \: \\ = - 23.333...\)

We have the final answer as

Hope this helps you

Answer:

1. 2+ (\(Cu^{2+}\)).

2. 0 (\(Cu^0\)).

Explanation:

Hello,

In this case, the described chemical reaction is a redox reaction in fact, since the oxidation states of both magnesium and copper change as shown due to the displacement:

\(Mg(s)+Cu(NO_3)_2(aq)\rightarrow Mg(NO_3)_2(aq)+Cu(s)\)

Therefore:

1. Since copper is the cation in the copper (II) nitrate, the (II) means that its charge is 2+ (\(Cu^{2+}\)).

2. Since copper is alone, it means no electrons are being neither shared not given, its charge is 0 (\(Cu^0\)).

Best regards.

Answer: \(Bi(OH)_3+3HNO_3\rightarrow 3H_2O+Bi(NO_3)_3\)

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced equation will be:

\(Bi(OH)_3+3HNO_3\rightarrow 3H_2O+Bi(NO_3)_3\)

Answer:

I'm assuming this is for the SCl₆ compound and not SC₁₆? If so, the molecular geometry is octahedral.

Explanation:

There are 6 regions and zero lone pairs surrounding the central atom (S).

Answer:

H2CO

Explanation:

Becuase it has 2 sigma bonds plus one pi bond and one sigma bond that consitute the double bond between C and O.

Answer:

B. H2CO

Explanation:

Answer:

chemical reaction hope this helps ;)

Explanation:

The units of van der Waals constant 'a'  Pa·m^6/mol^2 in SI units.

The units of van der Waals constant 'b' are m^3/mol in SI units.

The van der Waals equation is an equation of state that accounts for the deviations of real gases from the ideal gas behavior. The equation is given by:

(P + a(n/V)^2)(V - nb) = nRT

Where:

P = pressure

V = volume

n = number of moles

T = temperature

R = gas constant

a = van der Waals constant that accounts for the intermolecular attraction

b = van der Waals constant that accounts for the size of the molecules

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The number of moles of silver present in a silver spoon that has a mass of 12.86g is 0.12 moles.

The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass as follows:

The mass of a substance is the quantity of matter which a body contains, irrespective of its bulk or volume.

The mole of a substance is the amount of substance of a system which contains exactly 6.02214076 × 10²³ elementary entities e.g. atoms, molecules.

moles = mass ÷ molar mass

According to this question, silver spoon has a mass of 12.86g. The number of moles can be calculated as follows:

Molar mass of silver (Ag): 107.8682g/mol

moles = 12.86g ÷ 107.8682g/mol

moles = 0.12 moles

Therefore, 0.12 moles of silver are present in the silver spoon.

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The Confidence interval i.e, CI is calculated by the formula

CI= x±  zs/ √N

where,

z= Confidence level value

s= standard deviation

N= Total number of measurements taken

So, we know that,

For 95% confidence level,

z=1.96

For 96% confidence level ,

z= 2.58

We know that,

s= 0.27 mgCu/mL

x= 7.91 mg Cu/ mL

A)

99%CI = 7.91± 2.58×0.27/√1

= 7.91± 0.70 mgCu/mL

95% CI=  7.91± 1.96×0.27/ √1

= 7.91± 0.53mgCu/mL

B)

99%CI = 7.91± 2.58×0.27/√4

= 7.91± 0.35 mgCu/mL

95% CI=  7.91± 1.96×0.27/ √4

= 7.91± 0.26mgCu/mL

C)

99%CI = 7.91± 2.58×0.27/√16

= 7.91± 0.17 mgCu/mL

95% CI=  7.91± 1.96×0.27/ √16

= 7.91± 0.13 mgCu/mL

The  99% and 95% confidence level interval for single analysis can be calculated, and also for the mean of 4 and 16 analysis by changing the value of N.

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Answer:

Percent yield = 91%

Explanation:

Given data:

Theoretical yield of SF₆ = 124.3 G

Actual yield of SF₆ = 113.7 g

Percent yield of SF₆ = ?

Solution:

Formula:

Percent yield = (actual yield / theoretical yield)× 100

By putting values,

Percent yield = (113.7 g/ 124.3 g) × 100

Percent yield = 0.91 × 100

Percent yield = 91%

Answer:

it's exothermic reaction, becasue it have negative energy and the temperature increases

If 60 grams of the substance are added to 100 g of water, the solution can be categorized as supersaturated.

The graph shows the number of grams that can be dissolved in 100 grams of water at different temperatures. In general, solubility increases with temperature.

According to the graph, at a temperature of 30°C, it is possible to dissolve a total of 48 to 49 grams of \(KNO_{3}\). This information implies that if we add 60 grams at this temperature not all the substance would be dissolved, and therefore the solution would be supersaturated.

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Answer:

hello your question is incomplete and lacks the required figure  below is the missing part

The two sides of the DNA double helix are connected by pairs of bases (adenine, thymine, cytosine, and guanine). Because of the geometric shape of these molecules, adenine bonds with thymine and cytosine bonds with guanine shows the thymine adenine bond. Each charge shown is ±e, and the H−N distance is 0.110 nm

answer : net force due to O-H-N combination = -5.03354 * 10^-9 N

              net force due to N-H-N combination = -3.822 * 10^-9 N

              net force that the thymine exerts on adenine =  -8.8558 * 10^-9 N

Explanation:

considering only the forces due to O-H-N and N-H-N to determine the net force been exerted on adenine by thymine

we have to make some assumptions

we have to assume force towards thymine to be negative

Net force that thymine exerts on Adenine

= net force due to 0-H-N  + net force due to N-H-N

= ( -5.03354 * 10^-9 ) +  ( - 3.822 * 10 ^-9 )

=  -8.8558 * 10 ^-9 N

ATTACHED BELOW IS THE REMAINING PART OF THE SOLUTION