Select the correct answer.
A certain reaction has this form: aA bB.

At a particular temperature and [A]0 = 2.00 x 10-2 Molar, concentration versus time data were collected for this reaction and a plot of ln[A]t versus time resulted in a straight line with a slope value of -2.97 x 10-2 min-1.

How much time is required for the concentration of A to decrease to 2.50 x 10-3 Molar?
A.
70.03 minutes
B.
0.0096 minutes
C.
0.589 minutes
D.
29.70 minutes
E.
100 minutes

Answer:

Solidifications of alloys occurs over a range of temperatures whereas solidification of a pure metal will take place at a constant temperature

Answer:

aerobic (which needs oxygen) and anaerobic (which doesn't need oxygen). Aerobic respiration is a fixed metabolic reaction that takes place in the presence of oxygen, going on in a cell to transform chemical energy into ATPs. Anaerobic respiration is a process of cellular respiration in which the excessive energy electron acceptor is neither oxygen nor pyruvate derivatives

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Answer:

Agriculture, forestry, and fisheries are examples of cultural ecosystem services

Explanation:

They provide food (fisheries, agriculture) to both humans and other animals, and forestry provides recreation for humans and an ecosystem for animals!

Answer:

genatics play a huge part. Your mom may be on the tall side or may have cheated on your father. Plus she may of gotten married before you and her father where married or you may of allready been born before she meant your father meaning you have a differnt biological dad then you think.

Explanation:

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Have A Great Day

~Zero~

Answer:

(a) All are correct

Explanation:

catalyst a substance which speeds up a chemical reaction and remains itself unchanged.

example: Iron used in Haber process for the manufacture of ammonia.

Answer:

Remember that there are 5 moles of water for every 1 mole of hydrate

159.61g mol−1(159.61+5×18.015)g mol−1×100=63.92% CuSO4

This tells you that for every 100 g of copper(II) sulfate pentahydrate, you get 63.92 g of anhydrous copper(II) sulfate. Use this as a conversion factor to get

1.596g CuSO4⋅100 g CuSO4⋅5H2O63.92g CuSO4=2.497 g CuSO4⋅5H2O

Rounded to two sig figs, the answer will be

Answer:the answer is 0.0550L

Explanation:

Answer:

The Kelvin Scale has the highest value fir the boiling point of water. The Kelvin degree is the same size as the Celsius degree; hence the two reference temperatures for Celsius, the freezing point of water (0°C), and the boiling point of water (100°C), correspond to 273.15°K and 373.15°K, respectively.

Answer:

The Answer is Kelvin

Explanation:

Have a nice day/night!!

Answer:

Sodium, Mercury, Argon, and Neon are used in the production of lamps. There are fewer safety guidelines regarding the handling of Neon and Argon than there are for Mercury and Sodium. Which of the following best describes the elements within the group of the periodic table that contains Neon and Argon gas?

A) Solid at room temperature and mostly uncreative with strong acids.

B) Gaseous at room temperature and mostly unreactive with metals.

C ) Solid at room temperature and mildly reactive with strong acids.

D) Gaseous at room temperature and highly reactive with metals.

Explanation:

Answer: C.

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The best statement about the Neon and Argon gas is that they are gaseous at room temperature and mostly unreactive with metals.

The atoms which have complete octet in the outermost shell are known as stable atoms.

Neon and argon gases are the noble gases, as they have stable electronic configuration and shows non reactive nature with other elements. These are present in the gaseous state at room temperature.

Hence, option (B) is correct.

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Answer:the correct answer is A.To open an artery near the heart

Explanation:I just took the test :)

A stent is used to open an artery near the heart and the correct option is option A.

A stent is commonly used in medical procedures to open up narrowed or blocked arteries near the heart. It is a small, mesh-like tube typically made of metal or synthetic materials. The stent is inserted into the affected artery and expands, effectively widening the artery and improving blood flow. This procedure is known as coronary angioplasty or stenting.

The narrowing or blockage of arteries can occur due to atherosclerosis, a condition in which plaque builds up on the artery walls. This can lead to reduced blood flow and potentially result in chest pain (angina) or even a heart attack. By placing a stent, the artery is opened up, allowing for improved blood flow to the heart muscle.

Thus, the ideal selection is option A.

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moles of oxygen: 1/2 x moles of water

= 1/2 x 7.8 = 3.9

Answer:

The new volume if the balloon is cooled at constant pressure is 3.98 L

Explanation:

The new volume is calculated using the Charles law formula

that is V1/ T1 = V2/T2 where,

V1 = 4.24 l

T1= 23c into kelvin = 23 +273 =296 K

T2 = 5.00 c into kelvin = 5.00 + 273 = 278 K

V2 = ?

by making V2 subject the subject of the formula by multiplying both side by T2

V2 = V1 xT2/ T1

V2 = (4.24 L x 278 K) / 296 k = 3.98 L

Answer:

if the colliding objects have unequal mass, they will have unequal accelerations as a result of the contact force that results during the collision.

the answer to your question is

isotope

The outdoor temperature, also known as the ambient temperature, is a measure of the amount of heat in the environment and this depends on the kind of environment.

The outdoor temperature around here is about 33 [tex]^oC[/tex].

The temperature in the tropical area, where this area belongs, varies between 27 to 35 [tex]^oC[/tex] with an annual average of about 28 [tex]^oC[/tex].

In order words, tropical regions are generally warm, unlike temperate regions.

Tropical regions also have two distinct seasons, the rainy and the dry seasons. This is unlike temperate regions that have summer, spring, winter, and autumn.

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Answer:

All are reflective except for stone

i guess it is stone

Explanation:

Hope it helps!!!

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Answer: Option B; It traps light energy and converts it into chemical energy.

Answer:

You didn't give any options/statements, so I'm just going to give you context on what catalysts does. Catalysts decrease the activation energy needed, allowing more particles for successful reactions.

I know my colleague tried doing an experiment by using hydrogen peroxide as a catalyst and seeing how rates of reactions were affected. It ended up with a stain on our chemistry lab and him re-doing his entire lab.

Answer: 688 grams

Explanation:

2moles of H₂SO₄ are needed to react with 4 moles of NaOH.

The number of moles present in a compound is the total number of atoms, ions or molecules present in that compound.

Number of moles of any substance

= mass of that substance/molar mass of the substance

1 mole of any substance contains 6.022 × 10²³ number of atoms, ions or molecules. 6.022 × 10²³ is also known as avogadro's number.

The mole ratio of NaOH:H₂SO₄ is 2: 1

Which  means that  1mole of H₂SO₄ require 2 moles of NaOH.

Therefore 4 mole of NaOH will require:  4÷2=2 moles of  H₂SO₄

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Answer:

One plate is going underneath the other plate and sinking into soft rock below.

Explanation:

Tectonic plates will move each other to form rocks and mineral layers. The correct diagram which showing the result of two tectonic plates to each is diagram C.  One plate is going underneath the other plate and sinking into the soft rock below.

Earth's  lithosphere composed of tectonic plates of different sizes and shapes. These plates move away or each other results in the formation of soft rocks and mineral layers.

The magma inside the mantle of earth crust become hot fluid by convection and it flows out. This flow of magma creates slight movement in tectonic plates finally they move in different directions.

The rocks in earth crust will undergoes weathering and results in sand formation. The boundaries of the tectonic plate will be different in different regions and characteristics of that region depends on the type of boundary such as presence of islands volcanoes etc.

When two tectonic plates moves each other one  plate is going underneath the other plate and sinking into the soft rock below. Hence, option C correct.

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Your question is incomplete. But your complete question probably was:

Dr. Steiner and her team have been using GPS to track two plates that are moving toward each other. Which diagram shows what is happening at the place where the plates are moving toward each other?

Diagram A: Two plates are hitting each other, and the plates are breaking into pieces, creating sand.

Diagram B: Two plates are pushing against each other, causing the edges to bend upward.

Diagram C: One plate is going underneath the other plate and sinking into the soft rock below.

Diagram D: One plate is going underneath the other plate and sinking into the ocean below

Explanation:

They have a directly proportional relationship.

i.e.

when one of them varies in magnitude, the others will also vary directly.

Quantities expressed as products of each other are always inversely proportional & those expressed as quotients are directly proportional with each other.

KE = 1/2mv^2

Thus, we know that m & v in KE are inversely related.

Inverse proportionality - when m increases, v decreases. & vice versa.

Direct proportionality - when v increases KE also increases

If Temperature increases then the probability of atoms to randomly collide with each other increases rapidly.

the rapidity of these atoms result from the increase in speed(v). since v & KE have a direct r/n ship, KE also increases. as a result the atoms get a relatively high freedom of movement compared to that of those in solids.

Answer:

volume of HCl remains the same

Reaction

Zn (s) + 2HCl (aq)  ⇒  ZnCl₂ (s) + H₂ (g)

A. gas H₂ collected: true

B. Every chemical reaction produces or absorbs heat. In chemistry, this effect is described as the enthalpy of a reaction.

This reaction releases heat (exothermic) and causes the temperature to increase: true

C. the volume of HCl will decrease because it reacts: false

D. the size of the zinc metal decreases as it reacts: true

Answer:

O₂(g), Br₂(l) Fe(s), He(g)

Explanation:

Those elements that occur naturally in nature are the right answers because it took nothing to make them

Delta. Hf = 0 means no heat was lost or gained

standard enthalpy of formation is defined as the change in enthalpy when one mole of a substance in the standard state is formed from its pure elements under the same conditions

O₂(g): Yes, it is a pure element in the standard state.

N(g): No, the pure element in the standard state is N₂(g).

H₂O(l): No, it is not a pure element but a compound.

Br₂(l): Yes, it is a pure element in the standard state.

Fe(s): Yes, it is a pure element in the standard state.

He(g): Yes, it is a pure element in the standard state.

S₆(s): No, the pure element in the standard state is S₈(s, rhombic).

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The breakdown of NO3 in the day leads to more consumption of N2O5 in the day hence its concentration is greater at night than in the day.

The equilibrium constant is a number that shows how much reactants are converted to products in a reaction. It is often shown as capital letter K in English.

Given the situation described in the question, we know that the concentration of N205 will be higher at night, because the decomposition of NO3(g) in the daytime will result in an increase in the rate of consumption of N2O5(g) to reform NO3(g).

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HI and I⁻ is the acid-conjugate base pair.

According to Bronsted-Lowry definition of acid and base, those pair which are differ in the single no. of proton or H⁺ ion is known as acid and conjugate base pair or base and conjugate acid pair.

Given chemical reaction is:

HI + H₂O → H₃O⁺ + I⁻

Here, HI = acid,

H₂O = base,

H₃O⁺ = conjugate acid and

I⁻ = conjugate base

Hence, option (d) is correct i.e. HI & I⁻ is the acid-conjugate base pair.

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Answer:

d, HI and I–

Explanation:

i copied the other guy

Consider the reaction below.

HI + H2O Right arrow. H3O+ + I–

Which is an acid-conjugate base pair?

HI and H2O

H2O and H3O+

H3O+ and I–

HI and I–

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Study of the absorption and emission of light and other radiation by matter, as related to the dependence of these processes on the wavelength of the radiation.

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