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Answer:

Phosphorus P (s)

Neon Ne (g)

Chlorine Cl (g)

Explanation:

Iron: Fe(s) - The (s) denotes that iron is in its solid state.

Phosphorus: P(s) - The (s) indicates that phosphorus is in its solid state.

Neon: Ne(g) - The (g) signifies that neon is in its gaseous state.

Chlorine: Cl₂(g) - The (g) indicates that chlorine exists as a diatomic gas, with the formula Cl2, in its standard state.

Iron (Fe):

Iron is a chemical element commonly found in its solid state under standard conditions. The chemical symbol for iron is Fe, which is derived from the Latin word "ferrum." Iron is a lustrous, silvery-gray metal and is known for its strength and ability to be magnetized. In its standard state, iron exists as a solid, denoted by the (s) symbol. Therefore, the complete chemical formula for iron in its standard state is Fe(s).

Phosphorus (P):

Phosphorus is an element that exists in various forms, with the most common form being a solid known as white phosphorus. Under standard conditions, white phosphorus is the most stable and prevalent form. It is a waxy, white-to-yellowish solid that is highly reactive and combustible. The chemical symbol for phosphorus is P, and it is represented by the (s) symbol to indicate its solid state. Therefore, the complete chemical formula for phosphorus in its standard state is P(s).

Neon (Ne):

Neon is a chemical element that exists as a gas under standard conditions. It is a noble gas and is known for its bright red-orange glow when used in signs and lighting. Neon is chemically inert, meaning it does not readily react with other substances. The chemical symbol for neon is Ne, and it is represented by the (g) symbol to indicate its gaseous state. Therefore, the complete chemical formula for neon in its standard state is Ne(g).

Chlorine (Cl):

Chlorine is a halogen element that exists as a diatomic gas under standard conditions. It is a highly reactive and corrosive substance with a yellowish-green color and a pungent odor. Chlorine exists as a molecule with two chlorine atoms bonded together, forming Cl₂. The (g) symbol is used to indicate that chlorine exists as a gas. Therefore, the complete chemical formula for chlorine in its standard state is Cl₂(g).

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Answer:

the altitude in witch the athlete is running candy help them run faster useing less energy

The athletes acclimate to high altitudes, they have more red blood cells which allow their blood to inhale more oxygen.

In high-altitude environments, we breathe less oxygen per breath than at lower altitudes. Each breath delivers less oxygen to the muscles of our body.  In higher altitudes, a person is getting used to breathing “thinner” air which can enhance athletes’ athletic performance.

Training at high altitudes, feel like they’re putting forth more effort to perform and they do closer to sea level. The increased rate of exertion is caused by hypoxia, which is a reduction in the amount of oxygen to the muscles to burn fuel and produce energy.

Athletes acquire more red blood cells which offer their blood to hold more oxygen.  They get a natural boost to the muscles when additional oxygen is available when they compete at lower altitudes. Therefore, training at high-altitude training help athletes gets more oxygen to their cells.

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Answer:

A puddle

Explanation:

BAHAHAHAHA

Answer:

0.0705 M

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

H₂SO₄ + 2NaOH —> Na₂SO₄ + 2H₂O

From the balanced equation above,

The mole ratio of the acid, H₂SO₄ (nA) = 1

The mole ratio of the base, NaOH (nB) = 2

Next, data obtained from the question. This include the following:

Volume of acid, H₂SO₄ (Va) = 25 mL

Volume of base, NaOH (Vb) = 34.55 mL

Molarity of base, NaOH (Mb) = 0.1020 M

Molarity of acid, H₂SO₄ (Ma) =?

The molarity of the acid, H₂SO₄ can be obtained as follow:

MaVa / MbVb = nA/nB

Ma × 25 / 0.1020 × 34.55 = 1/2

Ma × 25 / 3.5241 = 1/2

Cross multiply

Ma × 25 × 2 = 3.5241

Ma × 50 = 3.5241

Divide both side by 50

Ma = 3.5241 / 50

Ma = 0.0705 M

Therefore, the concentration of the acid, H₂SO₄ is 0.0705 M

Answer:

C=0.140964M

Explanation:

M1V1=M2V2

DATA

M1=?

M2=0.1020M

V1=25.00ML

V2=34.55ML

M*25.00ML=(0.1020M)*(34.55ML)

M*25.00ML=3.5241M*ML

M=3.5241M*ML/25.00ML

M=0.140964M

Therefore, concentration of sulfuric acif is 0.140964M

Explanation:

cold climates hope this helps :)

Answer:

Cold climates

Explanation:

Warm climates favor chemical weathering. Cold climates favor mechanical weathering. Chemical reactions occur faster at higher temperatures.

we can do soo by noticing any colour change, or by the formation of an insoluble precipitate or by the evolution of a gas.

Answer:

A

Explanation:

The block’s average speed : 0.36 m/s

Distance is the length traveled by an object within a certain of time .  

Average speed = total distance/total amount of time ,

Can be formulated :

[tex]\tt avg.s(speed)=\dfrac{\Delta D}{\Delta t}[/tex]

ΔD= total distance

Δt= total time

A block is pulled 0.90 m to the right in 2.5 s :

ΔD= total distance = 0.9 m

Δt= total time = 2.5 s

The block’s average speed :

[tex]\tt avg.s=\dfrac{0.9}{2.5}=0.36~m/s[/tex]

Answer:

pH = 3.57 after adding 10ml of 0.125M NaOH

Explanation:

NaOH + HCHO₂ => NaCHO₂ + H₂O

=> 10ml(0.125M NaOH) + 30ml(0.030M HCHO₂)

=> 0.01(0.125)mol NaOH + 0.036(0.030)mol HCHO₂ ***(see reference note at end of problem)

=> 0.00125mol NaOH + 0.00315mol HCHO₂

=> (0.00315mol - 0.00125mol) HCHO₂ = 0.0019mol HCHO₂ in excess

+ 0.00125mol NaCHO₂ formed.

                  HCHO₂           ⇄       H⁺      +        CHO₂⁻

C(i):     0.0019mol/0.040L       0.00M      0.00125mol/0.40L

              = 0.0475M                                    = 0.0313M

ΔC:               -x                           +x                      +x

C(eq):     0.0475 - x                     x                  0.0313 +x

Ka = [H⁺][CHO₂⁻]/[HCHO₂] = (X)(0.0313 + x)/(0.0475) = 1.8 X 10⁻⁴

=> x² + 0.03168x + (-8.55 x 10⁻⁶) = 0

Solve with quadratic equation ...

x = 2.68 x 10⁻⁴M = [H⁺] at equilibrium

pH = - log[H⁺] = -log(2.68 x 10⁻⁴) = -(-3.57) = 3.57

___________________________________

*** remember, => moles = Molarity x Volume in Liters

Answer:

The ratio of concentrations is 79.4

Explanation:

Using Henderson-Hasselbalch equation we can solve the [PE]/[PEH+] ratio:

pH = pKa + log [A-] / [HA]

Where pH is 7.4

pKa of the phenylphrine is 5.5

[A-] is the weak base = [PE]

And [HA] is the conjugate acid [PEH+]

Replacing:

7.4 = 5.5 + log [PE] / [PEH+]

1.9 = log [PE] / [PEH+]

79.4 = [PE] / [PEH+]

The ratio of concentrations is 79.4

Answer:

False

Explanation:

The correct answer would be false.

If a chemical is ingested while working in the lab, the correct thing to do would be to contact the lab instructor right away as eating or drinking of any kind is prohibited in the laboratory.

While drinking milk may help in some cases depending on the nature and amount of the chemical ingested, only the lab instructor has the technical know-how to analyze the situation and administer first aids. Milk has the capacity to act as a buffer in some cases pending the time the victim would be able to get adequate medical attention.

Answer:

Atomic Number

Explanation:

The number of protons an atom has is unique to that element. The number of protons is noted as the atomic number for that element on the periodic table.

Answer:

B) rob is at a higher level of moral reasoning than kelly

Explanation:

i just took the quiz on edge 2020

Based on Lawrence Kohlberg's theory of moral reasoning statement with which Kohlberg agree with is that Rob is at a higher level of moral reasoning than Kelly.

Moral reasoning is an important and often daily process that people use when trying to do the right thing. For instance, every day people are faced with the dilemma of whether to lie in a given situation or not. People make this decision by reasoning the morality of their potential actions, and through weighing their actions against potential consequences.

A moral choice can be a personal, economic, or ethical one; as described by some ethical code, or regulated by ethical relationships with others. This branch of psychology is concerned with how these issues are perceived by ordinary people, and so is the foundation of descriptive ethics. There are many different forms of moral reasoning which often are dictated by culture.

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Answer:

Hey mate here's your answer ⤵️

Lemon juice in its natural state is acidic with a pH of about 2, but once metabolized it actually becomes alkaline with a pH well above 7

so it is necessary to place the coefficient 2 in the front of HCL to balance the chemical equation to prove that

we have two CL and two H atoms in the products and one Cl and one H atom in the reactants so if we dont put 2 in front of HCL the chemical equation will not be balanced

Answer:

0.834 M.

Explanation:

Hello!

In this case, since this is a first-order reaction, we can infer that the half-life and the rate constant are related via:

[tex]t_{1/2}=\frac{ln(2)}{k}[/tex]

Thus, we are able to compute the rate constant:

[tex]k=\frac{ln(2)}{t_{1/2}} =\frac{ln(2)}{32s}\\\\k=0.0217s^{-1}[/tex]

Next, since we have the resulting concentration of the reactant and we need the initial one, we proceed as shown below with the rate law:

[tex]A=A_0exp(-kt)\\\\A_0=\frac{A}{exp(-kt)} \\\\A_0=\frac{0.062M}{exp(-0.0217s^{-1}*2.0min*\frac{60s}{1min} )}\\\\A_0=0.834M[/tex]

Best regards!

Answer:

id say c though im not sure

Explanation:

Cooling towers are primarily used for heating, ventilation, and air conditioning (HVAC) and industrial purposes.

Answer:

c

Explanation:

i had this on my test

Answer:

D

Explanation:

The particles will move side to side over large areas.

Answer:

The particles will move side to side over large areas.

Explanation:

Answer:8

Explanation:

Atomic number = 8

Mass number = 18

The number of protons and the number of electrons is equal to the atomic number.

The number of neutrons in the nucleus is given by the difference in mass number and atomic number.

So, number of protons are 8

number of electrons = 8

number of neutrons = 18 - 8 = 10

Answer:

2.54 Centimeters.

Answer:

2,3,5

Explanation:

Got correct on EDG

Answer:

it is c

Explanation:

Answer:

C2H5OH(l)+3O2(g)⟶2CO2+3H2O(l)

Explanation:

The balanced equation for the combustion of ethanol will be

[tex]C_{2}H_{5}OH+3O_{2}------- > 2CO_{2}+3H_{2}O[/tex]. According to this carbon dioxide and water will be the product.

Combustion is a chemical process during which a material reacts quickly with oxygen and generates heat.

The original substance is referred to as the fuel, and the supplier of oxygen is referred to as the oxidizer. The fuel can be solid, liquid, or gas, but it is usually a liquid for airplane propulsion.

Combustion is a chemical reaction between two or more substances, usually involving oxygen, that produces light and heat in the form of a flame.

The products of complete ethanol combustion are carbon dioxide and water, as well as the start releasing of light and heat.

The equation will be:

[tex]C_{2}H_{5}OH+3O_{2}------- > 2CO_{2}+3H_{2}O[/tex]

Thus, in this way, the combustion of ethanol occurs.

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Answer:

-2.7 ×10²

Explanation:

Scientific notation is the way to express the large value in short form.

The number in scientific notation have two parts.

. The digits (decimal point will place after first digit)

× 10 ( the power which put the decimal point where it should be)

for example the number 6324.4 in scientific notation will be written as = 6.3244 × 10³

Given measurements = 4.3×10² - 7.0 ×10²

= -2.7 ×10²

Answer: [tex]Fe^{2+}[/tex] is the reducing agent

Explanation:

Oxidation reaction : When there is an increase in oxidation state number.

Reduction reaction : when there is a decrease in oxidation state number.

[tex]5Fe^{2+}(aq)+MnO_4^-(aq)+8H^+(aq)\rightarrow 5Fe^{3+}(aq)+Mn^{2+}(aq) +4H_2O(l)[/tex]

Fe has undergone oxidation, as its oxidation state is changing from+2 to +3.

Mn has undergone reduction, as its oxidation state is changing from +7 to +2.

The chemical agent which itself get oxidized and reduce others is called reducing agent.  [tex]Fe^{2+}[/tex]  is a reducing agent.

The chemical agent which itself get reduced and oxidize others is called oxidizing agent. [tex]MnO_4^-[/tex] is an oxidizing agent.

.

Answer:

It's actually D. 86.4%

Explanation:

When you combine coal, other gases, petroleum, nuclear, and natural gas, you get 86.4, which is the correct answer.

Answer:

b. hydride shift from C-3 to C-2.

Explanation:

Markovnikov's rule states that *in the addition of a protic acid HX or other polar reagent to an asymmetric alkene, the acid hydrogen (H) or electropositive part gets attached to the carbon with more hydrogen substituents, and the halide (X) group or electronegative part gets attached to the carbon with more alkyl substituents* (wikipedia).

This rule implies that the hydrogen of HBr will be attached to C-1 and the carbocation will be on C-2. Remember that the order of stability of carbocations is tertiary > secondary > primary > methyl. A hydride shift can yield a tertiary carbocation.

C-3 is a tertiary carbon atom. If the hydride on carbon 3 shifts to carbon 2, a tertiary and more stable carbocation is formed. This accounts for the major product in the reaction.

Answer:

Mass = 58.5 g

Explanation:

Given data:

Volume of solution = 4 L

Molarity of solution = 0.25 M

Grams of NaCl required = ?

Solution:

Formula:

Molarity = number of moles / volume in L

By putting values,

0.25 M = number of moles / 4 L

Number of moles = 0.25 mol/L × 4 L

Number of moles = 1 mol

Mass in gram:

Mass = number of moles × molar mass

Mass = 1 mol × 58.5 g/mol

Mass = 58.5 g