A gray element that borders on the zigzag line of the periodic table, is ductile and malleable, but is not a very good conductor of heat or electricity is known as which of the following?
A. metal
B. halogen
C. metalloid
D. nonmetal

Answer:

Explanation:

Explanation:

I think its this what you need

they "block the action of a neurotransmitter called acetylcholine. This inhibits nerve impulses responsible for involuntary muscle movements and various bodily functions. These drugs can treat a variety of conditions, from overactive bladder to chronic obstructive pulmonary disorder."

Not sure if 100% right

Elements do emit photons on those colors when electrons decay to a ground level orbit then the each element will produce its own set of color

Photon is the tiny particle of electromagnetic radiation

Light travels as discrete packets of light called photons and each photon will be carrying a certain amount of energy then the energy carried within a photon determines then what color it is with blue photons having about twice the energy as red photon and the fact are given below

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10 milliliters of 0.050 M EDTA are required to react with both 50.0 mL of 0.010 M Ca2+ and 50.0 mL of 0.010 M Al3+.

The balanced equation for the reaction between EDTA and metal ions is as follows:

Ca2+ (aq) + EDTA (aq) → CaEDTA (complex)

Al3+ (aq) + EDTA (aq) → AlEDTA (complex)

Moles of Ca2+:

moles of Ca2+ = concentration of Ca2+ x volume of Ca2+ solution

moles of Ca2+ = 0.010 M x (50.0 mL / 1000 mL)

moles of Ca2+ = 0.010 M x 0.050 L

moles of Ca2+ = 0.0005 moles

Moles of Al3+:

moles of Al3+ = concentration of Al3+ x volume of Al3+ solution

moles of Al3+ = 0.010 M x (50.0 mL / 1000 mL)

moles of Al3+ = 0.010 M x 0.050 L

moles of Al3+ = 0.0005 moles

The stoichiometry of the reaction tells us that 1 mole of Ca2+ or Al3+ reacts with 1 mole of EDTA. Therefore, the moles of EDTA required are also 0.0005 moles.

Volume of 0.050 M EDTA:

moles of EDTA = concentration of EDTA x volume of EDTA solution

0.0005 moles = 0.050 M x volume of EDTA solution

volume of EDTA solution = 0.0005 moles / 0.050 M

volume of EDTA solution = 0.01 L = 10 mL

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Hydrogen atoms are slightly positive and oxygen atoms are slightly negative in water best describes water as polar molecule. Option A is correct.

Due to the molecule's bent shape, water (H₂O) is polar. The shape implies the greater part of the negative charge from the oxygen on side of the particle and the positive charge of the hydrogen atom is on the opposite side of the atom

Two properties of water that outcome from the polar holding between its atoms are attachment and bond. These properties make water atoms 'adhere' to one another and to be drawn to other polar particles.

A polar particle is typically shaped when the one finish of the particle is said to have more certain charges and though the far edge of the atom has negative charges, making an electrical shaft.

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Answer with Explanation:

To determine the amount of water needed to dilute a 2.5 M KCl solution to a 1.0 M solution, we can use the dilution formula:

M1V1 = M2V2

where M1 is the initial concentration, V1 is the initial volume, M2 is the final concentration, and V2 is the final volume.

In this case, we know that:

M1 = 2.5 M

V1 = 550 mL

M2 = 1.0 M

We want to find V2, the final volume of the solution, which will be greater than 550 mL due to the addition of water.

Using the dilution formula, we can solve for V2:

M1V1 = M2V2

2.5 M x 550 mL = 1.0 M x V2

V2 = (2.5 M x 550 mL) / 1.0 M

V2 = 1375 mL

Therefore, we would need to add 1375 mL - 550 mL = 825 mL of water to 550 mL of a 2.5 M KCl solution to make a 1.0 M solution.

Answer:

C.  Galvanometer

Explanation:

A galvanometer measures electrical current.

Answer:

1.904 ppm

Explanation:

Concentration of drug in units of ppm = mass of solute / (mass of solution ) × 1000000

mass of blood = density of blood × volume = 1.05 g / ml × 5000 ml = 5250  g

mass of solution = mass of blood + mass of solute ( statin) = 5250 + 0.01 g  = 5250.01 g

Concentration of drug in units of ppm = (0.01 g / 5250.01 g) × 1000000 = 1.904 ppm

I hope this helps!!

(NH4)2S + 2AgC2H3O2 → Ag2S + 2NH4C2H3O2

Ammonium Sulfide + Silver Acetate = Silver Sulfide + Ammonium Acetate

The data that would demonstrate the action of photosynthesis is:

"When the container included a plant exposed to light, carbon dioxide concentration went from 800 to 600 ppm."

This data shows a decrease in carbon dioxide concentration from 800 to 600 ppm when a plant is exposed to light. During photosynthesis, plants absorb carbon dioxide from the surrounding environment and convert it into glucose and oxygen. The decrease in carbon dioxide concentration indicates that the plant is actively utilizing carbon dioxide for photosynthesis. As a result, the carbon dioxide level in the container decreases, demonstrating the action of photosynthesis. The other provided data points do not specifically indicate the action of photosynthesis. The first data point suggests that multiple plants in the container can prevent the carbon dioxide concentration from exceeding 1,000 ppm, but it does not indicate any decrease in concentration. The second data point mentions plants in darkness, which would not promote photosynthesis.

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In a nuclear reactor the uranium fuel is assembled in such a way that a controlled fission chain reaction can be achieved. The heat created by splitting the U-235 atoms is then used to make steam which spins a turbine to drive a generator, producing electricity.

To name Type 2 ionic compounds such as AuCl₃, you need to use the Stock system or Roman numeral system to indicate the oxidation state of the cation. Some steps are; Identify the cation, Determine the charge, Write the name, and combine two names.

Here are the steps to name AuCl₃; Identify the cation and anion. In this case, the cation is Au³⁺ and the anion is Cl⁻.

Determine the charge on the cation by using the anion's charge and balancing the charges to zero. Since Cl⁻ has a charge of -1 and there are three Cl⁻ ions in the compound, the total negative charge is -3. Therefore, the Au³⁺ ion has a charge of +3.

Write the name of the cation first, followed by the name of the anion with an -ide ending. Since the cation is Au³⁺, we use the name "gold(III)" to indicate the oxidation state of +3. The anion is Cl⁻, so we add the -ide ending to get "chloride".

Combine the two names to get the compound's name: "gold(III) chloride".

Therefore, the name of the Type 2 ionic compound AuCl₃ is "gold(III) chloride".

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Answer:

habitat/shelter

Explanation:

The balanced neutralization reaction between NaOH and HNO₃ is:

NaOH + HNO₃ ----> NaNO₃ + H₂O

The balanced neutralization reaction between NaOH and H₃PO₄ is:

3 NaOH + H₃PO₄ -----> Na₃PO₄ + 3 H₂O

If we compare the coefficients we see that we need the triple volume of the NaOH solution to neutralize the Phosphoric Acid solution.

Answer: Triple.

Having a greater volume definitely means a lower concentration (molarity) of solution. So, the statement is true.

Molarity of a solution is defined as the number of moles of solute present per unit volume of solution.

Here,

Since, the number of moles of solute in one litre of solution is known as the molarity, we can say that the change in volume of the solution will affect the molarity of the solution.

Molarity, M = n/V

where n is the number of moles of solute and V is the volume of solution

From the equation, we can say that the molarity of the solution is inversely proportional to its volume.

We know that, molarity of a solution is a temperature dependent parameter.

As the volume of the solution increases, the temperature also increases( Volume \(\alpha\) Temperature). When the temperature increases, it affects the molarity of the solution such that the number of moles remains constant and as a result of the increasing volume, the molarity decreases.

Hence,

Having a greater volume definitely means a lower concentration (molarity) of solution.

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Answer:

Which part of the immune system is a physical barrier?

> Skin.

How can individuals in communities prevent the global spread of hepatitis C?

> By avoiding the blood of other people.

A)skin is a physical barrier.

The physical barrier is incorporating the stratum corneum, corneocytes, and lipid layers, as well as the nucleated epidermis.

The skin provides an effective barrier between the organism and the environment, preventing the invasion of pathogens and fending off chemical and physical assaults, as well as the unregulated loss of water and solutes.

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2 remedies a seller has under the UCC when the buyer has breached and the seller still possesses the goods are that he can cancel the contract or withhold the delivery.

By contract, what did you mean?

An agreement between parties that establishes legal duties for both parties is known as a contract. Mutual consent, demonstrated by a valid offer and acceptance, sufficient consideration, capability, and legality are the fundamental components needed for the agreement to be a legally enforceable contract.

Contract with example: What is it?

A commitment made by one party to another that they will or won't take a particular action in the future. As an illustration, I'll offer you $3,500 to buy your car. An acceptance.

Therefore, it usually reflects the conditions of the offer—an indication, through speech or action, that both parties accept the terms of the contract.

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The ball's potential energy is transferring into kinetic energy

Brainly if correct? Thanks!

Answer:

A

Explanation:

The balls potential energy is changing to kinetic energy

Answer:

Coeficient: 70219691

Exponent: 0

Explanation:

3.687×10⁵ = 0.3687×10⁶

Then:

2.589 × 10⁶ ÷ 3.687 × 10⁵ = 2.589 × 10⁶ ÷ 0.3687 × 10⁶

= (2.589/0.3687) × (10⁶ / 10⁶)

= 7.0219691 × 1

= 7.0219691 × 10⁰

Note:

10⁰ = 1

Answer: D. closed

Explanation:

The system was closed in which combustion experiment conducted. Thus, option D is correct.

A closed system is a system in which there is only transfer of energy is takes place this type of system is known as closed system.

Example - Transfer of heat from a cup of tea.

Mainly there are three type of system.

1:- Open System

2:- Closed System

3:- Isolated System

Open system:-

A system in which there is transfer of both energy and mass these types of system is called as open system.

Example:- Flow of water in a canals

Closed System:-

A  system in which there is only transfer of energy is takes place this type of system is known as closed system.

Example - Transfer of heat from a cup of tea.

Isolated system:-

A system in which there is no transfer of energy and mass these type of system is called as isolated system.

Example - A thermoflask

Therefore, the system was closed in which combustion experiment conducted. Thus, option D is correct.

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Answer:

reactants are taken in from the environment by the plant,and products are formed inside the plant.

Explanation:

The mean of the data set is approximately 4.0626, and the 90% confidence interval is [4.060925, 4.064275].

The sample mean (x) is calculated as follows:

x = (4.0620 + 4.0550 + 4.0650 + 4.0740 + 4.0550 + 4.0660) / 6

x ≈ 4.0626 (rounded to four decimal places)

The 90% confidence interval is calculated as follows;

Standard deviation (s):

(4.0620 - 4.0626)² = 0.00000036

(4.0550 - 4.0626)² = 0.00000576

(4.0650 - 4.0626)² = 0.00000006

(4.0740 - 4.0626)² = 0.00001328

(4.0550 - 4.0626)² = 0.00000576

(4.0660 - 4.0626)² = 0.00000012

average of the squared differences:

(0.00000036 + 0.00000576 + 0.00000006 + 0.00001328 + 0.00000576 + 0.00000012) / 6 ≈ 0.00000624

s = √(0.00000624)

s ≈ 0.002496

the standard error of the mean (SEM):

SEM = 0.002496 / √6

SEM ≈ 0.001018

For a 90% confidence interval, the z value is approximately 1.645.

ME = 1.645 * 0.001018 ≈ 0.001675

CI = x ± ME

CI = 4.0626 ± 0.001675

CI ≈ [4.060925, 4.064275]

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The total amount of hydrogen gas generated is 9.76 L, under the condition that 15.9 g of hydrochloric acid reacts with excess zine metal.

Furthermore the balanced chemical equation for the reaction between hydrochloric acid and zinc metal is:
2HCl + Zn → ZnCl₂ + H₂
The molar mass of HCl is 36.46 g/mol.
Then, 15.9 g of HCl is equivalent to 15.9 g / 36.46 g/mol = 0.436 mol of HCl.
As per  the balanced chemical equation, 1 mole of HCl reacts with 1 mole of Zn to produce 1 mole of H₂ gas.
Hence, 0.436 mol of HCl will produce 0.436 mol of H₂ gas.
In Stp (Standard Temperature and Pressure), one mole of any gas occupies 22.4 L.
So, 0.436 mol of H₂ gas will occupy:
0.436 mol × 22.4 L/mol = 9.76 L (approx)
Then, approximately 9.76 L of hydrogen gas will be produced when 15.9 g of hydrochloric acid reacts with excess zinc metal at STP.
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The concentration of the chloride ion. I got 0.9 M is  mathematically given as

[CL^-]=0.9mm

The reactants are listed on the left side of a chemical equation, while the products are listed on the right. Both sides of a balanced chemical equation have the same number of atoms of each element and the same overall charge.

Generally, the chemical equation for the question  is  mathematically given as

b) If the solution is \($\mathrm{Fe}_{3}(a \omega)$\)

\(\begin{aligned}\mathrm{FCl}_{3} & \rightarrow \mathrm{a}^{+3}+3 \mathrm{Cl}^{-} \\& 1 \mathrm{Fe}^{+3} \mathrm{~S} 3 \mathrm{al} \text { ions incota. } \\\Rightarrow\left[\mathrm{El}^{-}\right] &=\frac{3}{4} \mathrm{Cl}^{-}+4 \mathrm{Cl}^{-} \\therefore\left[\mathrm{Cl}^{-}\right] &=1.2 \mathrm{~mm} \times \frac{3}{4} \\&=0.9 \mathrm{~mm}\end{aligned}\)

In conclusion, the concentration of the chloride ion. I got 0.9 M is

[CL^-]=0.9mm

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Ai. The car's initial kinetic energy is 22657.94 J

Aii. The car's initial potential energy is 939960.1 J

B. The car's final kinetic energy is 171420.38 J

C. The car's change in kinetic energy is 148762.44 J

Ai. How do I determine the car's initial kinetic energy?

We can obtain the initial kinetic energy of the car as illustrated below:

KE₁ = ½mu²

KE₁ = ½ × 566.99 × 8.94²

KE₁ = 22657.94 J

Aii. How do I determine the car's initial potential energy?

The car's initial potential energy can be obtained as shown below:

PE₁ = mgh

PE₁ = 566.99 × 9.8 × 169.164

PE₁ = 939960.1 J

B. How do I determine the car's final kinetic energy?

The final kinetic energy of the car can be obtained as illustrated below:

KE₂ = ½mv²

KE₂ = ½ × 566.99 × 24.59²

KE₂ = 171420.38 J

C. How do I determine the car's change in kinetic energy?

The change in the kinetic energy of the car can be obtained as follow:

ΔKE = KE₂ - KE₁

ΔKE = 171420.38 - 22657.94

ΔKE = 148762.44 J

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The percent by mass of the nitrogen is  82.4%.

We have to note that the percent by mass can be obtained when we know the molar mass of the compound and that is the first thing that we would need to find in the problem that we have in the question that have been asked.

The molar mass of the compound is; 14 + 3(1) = 17 g/mol

The percent by mass = Mass of N/ molar mass * 100/1

= 14/17 * 100/1

= 82.4%

The nitrogen would have a percent by mass in the compound of about  82.4%

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we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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Answer:

B) A drawn bow is released, causing an arrow to fly across the field

Explanation:

Potential energy can be thought of as "potential" to do something. For eg, putting a ball on top of hill causes the ball to have the potential to roll down the hill if released. Here the ball converts the potential energy into kinetic energy (energy of motion) to roll down.

Similarly, the bow has been stretched (potential to fly if released), and when its released, it converts the potential energy into kinetic energy.

The empirical mass of the compound, given that the molecular formula of the compound is N₂O₂, is 60 g/mol

First, we must understand here that empirical mass of a compound is simply the molar mass of the compound.

This means that if we obtain the molar mass of a compound, then we have equally obtain the empirical mass of the compound.

Now, we shall obtain the molar mass of the compound. Details below:

Molar mass of N₂O₂ = (14 × 2) + (16 × 2)

Molar mass of N₂O₂ = 28 + 32

Molar mass of N₂O₂ = 60 g/mol

From the above, the molar mass of the compound is 60 g/mol

Thus, we can conclude that the empirical mass of the compound is 60 g/mol

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Answer:

Force is measured in Newtons

Explanation:

To find normal force on an incline, use the equation N = mg cos(x), “m” being the object's mass, “g” being the acceleration of gravity, and “x” being the angle of incline. Then, use a calculator to find the cosine of the angle and write down that value.

When the moving car brakes to the stop the kinetic energy of car will be converted to the heat energy.

The mechanical brake will be applies to the friction force and it convert the kinetic energy of the car into the thermal energy that which then dissipates on atmosphere. The process of the braking will follow the principle of the conservation of the energy.

The conservation of the energy is the principle, that is expressed in its the most general form, and it is the first law of the thermodynamics. The first law of thermodynamics explains that "the energy of the universe remains the same."

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This question is incomplete, the complete question is :

A car in motion has kinetic energy. A moving car is suddenly stopped. Why does the car stop? Where did the energy go?