1. Estuaries may be either brackish or
freshwater systems.
True
O False

Answer:

The mass of copper that was heated is 30 g

Explanation:

The formula for the heat supplied, ΔH is;

ΔH = m·c·Δt

Where:

ΔH = Heat supplied = 480 J

m = Mass of the copper sample = Required

c = Specific heat capacity of copper = 0.4 J/(g·°C)

Δt = Change in temperature = T₂ - T₁ = 60° - 20° = 40°C

T₁ = Initial temperature = 20°C

T₂ = Final temperature = 60°C

Therefore, plugging the values, we have;

480 = m×0.4×40

m = 480/(0.4 × 40) = 30 g

The mass of copper that was heated = 30 g.

Answer : The temperature [tex]Cl_2[/tex] gas is, 153 K

Explanation :

Using ideal gas equation:

[tex]PV=nRT[/tex]

where,

P = Pressure of [tex]Cl_2[/tex] gas = 900 torr = 1.18 atm   (1 atm = 760 torr)

V = Volume of [tex]Cl_2[/tex] gas = 0.750 L

n = number of moles [tex]Cl_2[/tex] = 0.0705 mole

R = Gas constant = [tex]0.0821L.atm/mol.K[/tex]

T = Temperature of [tex]Cl_2[/tex] gas = ?

Putting values in above equation, we get:

[tex]1.18atm\times 0.750L=0.0705mole\times (0.0821L.atm/mol.K)\times T[/tex]

[tex]T=152.9K\approx 153K[/tex]

Therefore, the temperature [tex]Cl_2[/tex] gas is, 153 K

Answer:

C₅H₁₀O₄  

Explanation:

The empirical formula is the simplest whole-number ratio of atoms in a compound.

The ratio of atoms is the same as the ratio of moles.

So, our job is to calculate the molar ratio of C:H:O.

Assume 100 g of deoxyribose.

1. Calculate the mass of each element.

Then we have 44.8 g C, 7.5 g H, and 47.7 g O.

2. Calculate the moles of each element

[tex]\text{Moles of C} = \text{44.8 g C} \times \dfrac{\text{1 mol C}}{\text{12.01 g C}} = \text{3.730 mol C}\\\\\text{Moles of H} = \text{7.5 g H} \times \dfrac{\text{1 mol H}}{\text{1.008 g H }} = \text{7.44 mol H}\\\\\text{Moles of O} = \text{47.7 g O} \times \dfrac{\text{1 mol O}}{\text{16.00 g O }} = \text{2.981 mol O}[/tex]

3. Calculate the molar ratio of the elements

Divide each number by the smallest number of moles

C:H:O = 3.730:7.44:2.981 = 1.251:2.50:1 = 5.005:9.98:4 ≈ 5:10:4

4. Write the empirical formula

EF = C₅H₁₀O₄

Answer:

A

Explanation:

like charge repel, unlike attract

Answer:

A.

Explanation:

Particles of the same charge repel each other. E.g. + and + OR - and -.

Question:

Which subscripts complete the chemical formula for the compound?

Answer:

A: 3

B: 8

Answer:

A) 3

B) 8

Explanation:

Answer

B. a fruit falling from a tree

Explanation:

Take, for example, an apple tree. ... The tree uses this energy to build leaves and branches and fruit. When an apple falls from the tree to the ground, its energy of position (stored as gravitational potential energy) is converted to kinetic energy, the energy of motion, as it falls.

Comets have very elliptical orbits, are usually found in the outer regions of the solar system, have irregular shapes, and exhibit a coma and tail when they approach the Sun.

Comets are celestial objects that have very elliptical orbits. Unlike planets, which have more circular orbits, comets follow a path that is elongated and elongated.

Comets are usually found in the outer regions of our solar system, beyond the orbit of Mars, in a region known as the Kuiper Belt or the Oort Cloud. These regions are located far away from the Sun, where the gravitational pull is weaker, allowing comets to maintain their elliptical orbits.

The irregular shape of comets is another characteristic feature. Unlike planets, which have a more spherical shape due to their strong gravitational force, comets have a more irregular shape. This is because comets are made up of a combination of ice, dust, rock, and other materials, which can cause them to have a lumpy or uneven appearance.

When a comet approaches the inner regions of the solar system, it can be observed as a bright coma or "head" surrounding a nucleus. The nucleus is the solid core of the comet, composed mainly of ice and rock. As the comet gets closer to the Sun, the heat causes the ice to vaporize, creating a glowing coma and often a tail that points away from the Sun.

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Answer: 25.3g

Explanation:

The number of moles in chemistry is connected to the Mass and Molar mass of a compond through the following formular;

Moles = Mass (g)  /  Molar Mass (g/mol)

0.25 mol  =  Mass (g) / 101 g/mol

Make 'Mass' the subject of the formular;

Mass = 0.25 mol x 101 g/mol

          = 25.25 approx 25.3g

Answer:

22Mol

Explanation:

2Mg + O2 --> 2MgO

If 11 mols of O2 reacted with excess Mg with 22 MgO moles will be created

Answer:

ANswers is simply

Explanation:

8.73kJ

Answer:

HEAT REQUIRED TO RAISE THE TEMPERATURE OF 179 ACETIC ACID FROM 25 °C TO 82.7°C IS 21 100j OR 21.1 kJ

Explanation:

Heat = mcΔT

m = 179 g

C =  2.043 J.g-1K-1

ΔT = ( 82.70 - 25 ) = 57.7°C

Heat = 179 * 2.043 * 57.7

Heat = 21, 100.72 J

Heat ≅ 21.1 kJ

Answer:

2?????

Explanation:

Answer:

NH4+

Explanation:

A Lewis base is a substance with the ability to share or give pairs of electrons.

The NH4 + ammonium ion donates a proton, therefore the ammonium ion is a Lewis acid.

The species that cannot act as a Lewis base NH4+.

It refers to a substance like OH- ion where the pair should be donated of non-binding electrons. It should be treated as the electron-pair donor. Also, the one advantage is that it complements the reduction and oxidation of the reaction model. Moreover, it shows the capability for sharing or providing the pair of electrons. Also, NH4+ donated the portion so ammonium ion is a Lewis acid.

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Answer:

?

Explanation:

Answer : the sky (teehee)

Answer:

Condensation Reaction

Explanation:

Answer:

A. Organic Chemistry

Explanation:

Because Fertilizer is a organic Mixture

Answer:

A. Organic Chemistry

Explanation:

Answer:

Please Mark as Brainliest!!!!!!!!!!

Explanation:

Increasing pressure is causing a smaller change in gas volume. The closeness of particles of gas and their low speeds allow intermolecular forces to become important at certain pressured and temperature

After volcanic eruption the new land will be populated with a large number of organisms called pioneer species. The process is called Primary succession.

The process in which a new land is created or exposed for the first time after volcanic eruption is defined as the primary succession. During this time the lava cools and produces new rocks.

After this first of all the lichens are found to attach themselves to rocks and the plant species which can grow without much soil can appear. Gradually the decomposition of all these plants helps in soil formation.

As a result more and more plants begin to colonize the area. So this land then becomes a fertile land with lot of nutrients and can lead to the formation of forest. Then after secondary succession occurs.

Thus in primary succession the newly formed land has been populated by many living organisms.

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Answer: 4.5

Explanation:

Answer:is 1.08 kg

Explanation:

Just got it wrong and it gave me the answer

47.5atm is the total pressure. The force delivered perpendicularly to an object's surface per unit area across how that force is dispersed is known as pressure

The force delivered perpendicularly to an object's surface per unit area across how that force is dispersed is known as pressure (symbol: p / P).445 Gauge pressure, sometimes written as gauge pressure, is the pressure in relation to the surrounding air pressure.

Pressure is expressed using a variety of units. Some of these come from dividing a unit of force by a unit of area; for instance, the SI unit of stress, the pascal (Pa), is equal to one newton each square metre (N/m2), and the conventional unit of pressure used by both the imperial while US customary systems is the pound-force according square inch of surface (psi, symbol lbf/in2).

Volume of gas = 47.5ML

P x V=51.3

P x  47.5=51.3

P=47.5atm

Therefore, 47.5atm is the total pressure.

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Answer: 1) HI to increase

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

[tex]2HI(g)\rightleftharpoons H_2(g)+I_2(g)+energy[/tex]

As the given reaction is exothermic , on increasing the tempearture, the equilibrium will shift in the direction where decrease in tempearture is taking place.So, the equilibrium will shift in the left direction. i.e. towards reactants. Thus amount of [tex]HI[/tex] will increase.

When the temperature of the system increased so it leads the concentration to option 1. HI to increase.

It defines that if any change in the reaction variables so the equilibrium should be shifted in the direction so the impact should be minimized.

Since the given reaction is considered to be exothermic, so in the case when the temperature is increased so the equilibrium should be shifted in the direction that reduced the temperature.

Therefore, the equilibrium should be shifted in the left direction.

Hence the first option is correct.

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Answer:

0.225M

Explanation:

Step 1:

Data obtained from the question. This includes:

Volume of the stock solution (V1) = 125mL

Molarity of the stock solution (M1) = 0.90 M

Volume of the diluted solution (V2) = 125 + 375 = 500mL

Molarity of the diluted solution (M2) =..?

Step 2:

Determination of the molarity of the diluted solution.

This is obtained by using the dilution formula as follow:

M1V1 = M2V2

0.9 x 125 = M2 x 500

Divide both side by 500

M2 = (0.9 x 125) /500

M2 = 0.225M

Therefore, the molarity of the diluted solution is 0.225M

Answer:

The molarity of the diluted solution of NaOH is 0.225 M NaOH

Explanation:

Here, we have, initial concentration of the solution = 0.90 M NaOH

Volume of initial solution = 125 mL

Volume of added water = 375 mL

Total volume of diluted solution = 375 mL + 125 mL = 500 mL

Number of moles in the diluted solution = 0.9 × 0.125 = 0.1125 moles of NaOH

Derived from the following relation;

0.9 M NaOH indicates that 1000 mL contains 0.9 moles of NaOH

Therefore, 1 mL contains 0.9/1000 moles of NaOH and 125 mL contains 0.9/1000×125 or 0.9 × 0.125 moles of NaOH

Therefore, the diluted 500 mL solution contains 0.1125 moles of NaOH. Therefore, 1000 mL of the diluted solution will contain [tex]1000 \times \frac{0.1125}{500} \ moles[/tex] of NaOH or 0.225 moles of NaOH

Hence the molarity of the diluted solution of NaOH, which is the number of moles per 1000 mL is 0.225 M.

Answer:

False

Explanation:

Answer:

Chemical change

In high frequency waves, the wavelength is short and appears in many short bursts. Meanwhile, in a low frequency wave, the wavelength is longer since it takes it a longer period of time to occur/pass.

Answer:

im not sure exactly what terms this question is in but recycling?

Answer: The muscularis (muscularis externa)

Explanation: please brainliest

the muscle that helps with digestion is a smooth muscle called the tract

Answer:

solar wind

Explanation:

pls pls pls give me brainiesttt tyty

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