What are the disadvantages of the use of chemical fertilizers?

Answer:

T₂  = 956.0 K

Explanation:

Given data:

Initial temperature = 273.15 K

Initial pressure = 1 atm

Final pressure = 3.5 atm

Final temperature = ?

Solution:

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

1 atm / 273.15 K = 3.5 atm / T₂

T₂  = 3.5 atm ×273.15 K / 1 atm

T₂  = 956.0 atm. K /  1 atm

T₂  = 956.0 K

Answer:

2 A): Fluorine

B): more protons, more force attraction less atomic radius

3A): Helium

B):it has small atomic radius

4 th question is not visible.....

Answer:

yes

Explanation:

i did the test

Answer:

the answer is

a

b

d

c

Explanation:

hopeit help

The correct matches will be:

                     [tex][Cl]=1s^22s^22p^63s^23p^5[/tex]

                     [tex][Ne]=1s^22s^22p^6[/tex]

                       [tex][P]=1s^22s^22p^63s^23p^3[/tex]

                        [tex][S]=1s^22s^22p^63s^23p^4[/tex]

So, from this, we can conclude that the correct matches will be:

Learn more about the valence electrons here:

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Answer:

Pressure is inversely proportional to the volume of a gas at constant temperature and number of moles

Temperature is directly proportional to volume at constant pressure and number of moles

Volume is directly proportional to the number of moles of a gas at constant temperature and pressure

Explanation:

The ideal gas law is derived from a combination of the Boyle's, Charles' and Avogadro's law of gases.

Boyle's law states that at constant temperature, the volume of a given mass of gas (number of moles of gas is constant) is inversely proportional to the pressure exerted by the gas.

V ∝ 1/P (at constant n, T)

Charles'law states that at constant pressure, the volume of a given mass of gas (constant amount, n) is directly proportional to the temperature of the gas; V ∝ T (at constant n, P)

Avogadro’s law states that at constant temperature and pressure, the volume of a given mass of gas is directly proportional to the number of moles of gas present; V ∝ n(at constant T, P)

Combining the three equations gives the following relationship: V ∝ nT/P

By inserting a proportionality constant called the molar gas constant, R, in the relationship above, the ideal gas equation is derived as follows:

V = nRT/P or PV = nRT

Answer:

the third one

Explanation:

Answer:

hr

Explanation:

because it's short for hour

Answer:

I would say that the temp would increase but the liquid would turn into a gas faster. You can always keep heating liquid until it turns into a gas and is no longer in the pan.

Answer: 3. No displacement, zinc is most reactive.

4. Calcium Chloride, Calcium is most reactive.

5. No displacement, Copper is most reactive

6. No displacement, Calcium is most reactive

7. Hydrogen Oxide, Hydrogen is most reactive

8. Carbon oxide, Carbon is most reactive

9. No displacement, Aluminum is most reactive

10. Potassium Kryptide + Lead, no displacement, Potassium is most reactive.

Answer:

A siege engine is a device that is designed to break or circumvent heavy castle doors, thick city walls and other fortifications in siege warfare. Some are immobile, constructed in place to attack enemy fortifications from a distance, while others have wheels to enable advancing up to the enemy fortification.

Explanation:

Answer:

D : oxygen

Explanation:

i took the test <3 good luck

Answer:

its d

Explanation:

Answer:

chlorine and potassium

Explanation:

Answer:

Chlorine and potassium

Answer:

radioactive

nonmetal

hydrogen

liquid

rarely (since they have a full valence electron shell)

inner transition

The new temperature (T₂) in the lab = 25.09 °C

Given

V₁=2.15 ml

T₁ = 17 + 273 = 290 K

P = 740.2 mmHg

V₂ = 2.21 ml

Required

The new temperature (T₂)

Solution

Charles's Law

When the gas pressure is kept constant, the gas volume is proportional to the temperature

[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]

Input the value :

T₂=(T₁.V₂)/V₁

T₂=(290 K x 2.21 ml)/2.15 ml

T₂=298.09 K = 25.09 °C

Answer:

20 g of MgSO₄.

Explanation:

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

Mg + H₂SO₄ —> MgSO₄ + H₂

Next, we shall determine the mass of Mg that reacted and the mass of MgSO₄ produced from the balanced equation. This is illustrated below:

Molar mass of Mg = 24 g/mol

Mass of Mg from the balanced equation = 1 × 24 = 24 g

Molar mass of MgSO₄ = 24 + 32 + (16×4)

= 24 + 32 + 64

= 120 g/mol

Mass of MgSO₄ from the balanced equation = 1 × 120 = 120 g

SUMMARY:

From the balanced equation above,

24 g of Mg reacted to produce 120 g of MgSO₄.

Finally, we shall determine the mass of MgSO₄ produced by the reaction of 4 g of Mg. This can be obtained as follow:

From the balanced equation above,

24 g of Mg reacted to produce 120 g of MgSO₄.

Therefore, 4 g of Mg will react to produce = (4 × 120)/24 = 20 g of MgSO₄.

Thus, 20 g of MgSO₄ is obtained from the reaction.

Answer:

The solubility curve helps us to predict which substance will crystallize out first from a solution containing two or more solutes.

The solubility curve helps us to compare the solubilities of different substances at the same temperature.

Solubility curve can be used to determine the amount of substance deposited when the solution is cooled.

It brings the change in the solute composition substance.

Answer:

1, we can know the solubility curve of substances.

2, we can compare the solubility curve of two or more substances in same temperature.

3, we can know the amount of solute and solvent which is used that solubility.

4, we can know that solubility of substances changes with temperature.

Answer: The number of formula units present in 2 moles of [tex]C_6H_{12}O_6[/tex] are [tex]1.2044\times 10^{24}[/tex]

Explanation:

Formula units are defined as the number of molecules or atoms present in 1 mole of a compound or element respectively.

According to mole concept:

1 mole of a compound contains [tex]6.022\times 10^{23}[/tex] number of formula units

Here, 2 represents the number of moles of [tex]C_6H_{12}O_6[/tex]

We are given:

Moles of [tex]C_6H_{12}O_6[/tex] (glucose) = 2 moles

Number of formula units of [tex]C_6H_{12}O_6=(2\times 6.022\times 10^{23})=1.2044\times 10^{24}[/tex]

Hence, the number of formula units present in 2 moles of [tex]C_6H_{12}O_6[/tex] are [tex]1.2044\times 10^{24}[/tex]

Answer:

25N

Explanation:

The force calculated to be 25kgm/s² has a value of 25N.

To solve this problem, we need to consider the unit of force. The unit of force is expressed in N, newtons.

  To find force;

           Force  = mass x acceleration

            Unit of mass  = kg

                      acceleration  = m/s²

 So;

        1N  = 1kgm/s²

Therefore 25kgm/s² is the same as 25N

Explanation:

To calculate the number of atoms in a sample, divide its weight in grams by the amu atomic mass from the periodic table, then multiply the result by Avogadro's number: 6.02 x 10^23.

Answer:

In pretty sure it's B, Beta

Explanation:

Photosynthesis is a chemical change as:

A. New substances are formed with properties that are different from the original substances.

A chemical change happens when one chemical substance is transformed into one or more different substances. A chemical change is different from a physical change, which doesn't rearrange atoms or molecules and produce a completely new substance.

Thus, correct option is A which proves that photosynthesis is a chemical change.

Find more information about Chemical change here: brainly.com/question/453535

Answer:

1. Mass of CaCl2 salt in grams

2. Volume of water in calorimeter

3. Mass of water in calorimeter

4. Mass of salt and water solution

5. Initial temperature of water

6. Final temperature of water

7. Temperature difference or change

Explanation:

The amount of heat absorbed or released during a chemical reaction is measured by the process of calorimetry. A calorimeter is a device used for the heat measurements in calorimetry. It consists of an insulated vessel that prevents heat exchange with the environment. The quantity of heat absorbed or released by a chemical reaction is calculated using the following formula: Q = mc∆t

The molar heat of solution, ∆Hsoln, of a substance is the heat absorbed or released when one mole of the substance is dissolved in water. In determining the molar heat of solution of a salt, e.g. calcium chloride, the following measurements are required:

1. Mass of CaCl2 salt in grams

2. Volume of water in calorimeter

3. Mass of water in calorimeter

4. Mass of salt and water solution

5. Initial temperature of water

6. Final temperature of water

7. Temperature difference or change

Answer:

Its changes over time.

Explanation:

I think because each ocean current has a different temperature.

Answer:

Thermohaline circulation. This is a process driven by density differences in water due to temperature (thermo) and salinity variations in different parts of the ocean. Currents driven by thermohaline circulation occur at both deep and shallow ocean levels and move much slower than tidal or surface currents.

Answer:

its called a runoff :)

Explanation:

hope this helpssss <3