How Much Pb(NO3)2 Would Need To Be Added To 100 ML Of Water To Make A Saturated Solution At 40C. (2024)

Answer:

The earth is split into four major layers: the crust, the mantle, the outer core and the inner core

Explanation:

Answer:

A synthesis reaction is a reaction that occurs when two or more reactants combine into one product.

Explanation:

A reaction that occurs when two or more reactants combine into one product is called a synthesis reaction.

A reaction that occurs when one element within a compound is exchanged with another element is called a single replacement reaction.

A reaction that occurs when a substance combines with molecular oxygen, releasing light and energy is called combustion.

A reaction that occurs when a single substance breaks apart and forms two or more new substances is called decomposition.

Answer:

First slide:

1) diffusion

2)water

3)high

4)low

5)balance

Second slide:

1)movement

2)without

3)energy

4)high

5)low

6)equilibrium

Final slide:

1)passive

2)energy

3)randomly

4)high

5)low

6)equilibruim

7)permeable

8)Osmosis

9)water

Hopes this helps! Good luck!

Answer: The heat energy absorbed by glass window is 84420 J.

Explanation:

Given: Mass = 15 kg (1 kg = 1000 g) = 15000 g

Initial temperature = [tex]20^{o}C[/tex]

Final temperature = [tex]26.7^{o}C[/tex]

Specific heat capacity = [tex]0.840 J/g^{o}C[/tex]

Formula used is as follows.

[tex]q = m \times C \times (T_{2} - T_{1})[/tex]

where,

q = heat energy

m = mass of substance

C = specific heat capacity

[tex]T_{1}[/tex] = initial temperature

[tex]T_{2}[/tex] = final temperature

Substitute the values into above formula as follows.

[tex]q = m \times C \times (T_{2} - T_{1})\\ q = 15000 g \times 0.840 J/g^{o}C \times (26.7 - 20)^{o}C\\q = 84420 J[/tex]

Thus, we can conclude that the heat energy absorbed by glass window is 84420 J.

Around Home

1. Conserve Water

Use less water so excess runoff and wastewater will not flow into the ocean.
2. Reduce Pollutants

Choose nontoxic chemicals and dispose of herbicides, pesticides, and cleaning products properly.
3. Reduce Waste

Cut down on what you throw away.
Around Town

4. Shop Wisely

Choose sustainable seafood. Buy less plastic and bring a reusable bag.
5. Reduce Vehicle Pollution

Use fuel efficient vehicles, carpool or ride a bike.
6. Use Less Energy

Choose energy efficient light bulbs and don't overset your thermostat.
On the Water

7. Fish Responsibly

Follow "catch and release" practices and keep more fish alive.
8. Practice Safe Boating

Anchor in sandy areas far from coral and sea grasses. Adhere to "no wake" zones.
9. Respect Habitat

Healthy habitat and survival go hand in hand. Treat with care.
10. Anytime, Anywhere

Volunteer

Volunteer for cleanups at the beach and in your community. You can get involved in protecting your watershed too!

Hope this helps

Answer:

10.3 mol Ga(ClO₃)₃

Explanation:

Let's consider the following balanced thermochemical equation.

2 Ga(ClO₃)₃(s) ⇒ 2 GaCl₃(s) + 9 O₂(s) ΔH = - 130.4 kJ

According to the balanced thermochemical equation, 130.4 kJ of heat are released when 2 moles of gallium chlorate react. The number of moles of gallium chlorate that must react to produce 674 kJ of energy is:

674 kJ × 2 mol Ga(ClO₃)₃/130.4 kJ = 10.3 mol Ga(ClO₃)₃

Thermochemical equations are chemically balanced equations that take into account both the energy change and the physical states of all reactants and products. Energy is a reactant in an endothermic process, whereas it is a product in an exothermic reaction. Here the moles of Ga(ClO₃)₃ is 10.3 mol.

Let's consider the following balanced thermochemical equation.

2Ga(ClO₃)₃(s) ⇒ 2GaCl₃(s) + 9O₂(s) ΔH = - 130.4 kJ

According to the balanced thermochemical equation, 130.4 kJ of heat is released when 2 moles of gallium chlorate react. The number of moles of gallium chlorate that must react to produce 674 kJ of energy is:

674 kJ × 2 mol Ga(ClO₃)₃ / 130.4 kJ = 10.3 mol Ga(ClO₃)₃

To know more about thermochemical equation, visit;

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Answer:

Limiting reactant is FeCl3; 1.7 g of Mg remain.

Explanation:

From the question;

The equation is;

3Mg(s) + 2FeCl₃(s) → 3MgCl₂(s) + 2Fe(s)

Amount of Mg = 41 g/24.31 g/mol = 1.687 moles

The limiting reactant yields the least amount of MgCl2

3 moles of Mg yields 3 moles of MgCl2

Hence 1.687 moles of Mg yields yields 1.687 moles of MgCl2

FeCl₃ = 175 g/162.2 g/mol = 1.0789 moles

2 moles of FeCl3 yields 3 moles of MgCl2

1.0789 moles of FeCl3 yields 1.0789 * 3/2 = 1.61835 moles of MgCl2

Hence FeCl3 is the limiting reactant

3 moles of Mg reacts with 2 moles of FeCl3

x moles of Mg reacts with 1.0789 of FeCl3

x = 3 * 1.0789 /2 = 1.61835 moles of Mg

Mass of Mg reacted = 1.61835 moles * 24.31 = 39.342 g

Mass of excess Mg = 41 g - 39.342 g = 1.7 g

Answer:

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Explanation:

Answer:

Density is the total number of particles in a given volume

Explanation:

As per the particle theory, density is defined as total space occupied by certain number of particles of any given element with in a defined volume is termed as density.

Density is not the denseness of a single unit but the space occupied by many single units with in a given volume V

Hence, density is the total number of particles in a given volume.

Answer:

An environment is a local area of living creatures existing related to the nonliving segments of their current circ*mstance, interfacing as a framework. These biotic and abiotic segments are connected together through supplement cycles and energy streams.

Explanation:

Answer:

Living organisms require a proper, stable ecosystem/envirornment to function

Explanation:

B- Mechanical digestion begins in the mouth, and includes the tearing and grinding of food with teeth.

C- Mechanical digestion uses teeth to grind food and saliva to moisten the food

making it easier to chew.

These points are true.

Answer:

b) Weeding is the process of growing weed

Explanation:

Wedding is an agricultural process carried out to ensure maximum you won't do. It is the process by which weeds i.e. unwanted plants are removed.

As rightly stated in the question;

- Weeding is either done by manual means e.g Cutlasses or use of weedicides, which are chemicals.

- Weeding is best done during tiling operations.

The incorrect option is that "Weeding is the process of growing weed" rather it is a process of removing weed.

Answer: Option C is correct

Grams solid x mol/g * A Hfusion

Explanation:

This is because from fusion is associated to melting and this is a process where solid particles or substances goes through transition phase and turn to liquid.

There for the stoichiometry is used to calculate energy absorbed when solid mass melt with the formula Grams solid x mol/g * A Hfusion.

Answer:

0.5 M

Explanation:

Molarity = moles of solute / liters of solution

Answer:

Due to the presence of 4 valence electrons.

Explanation:

The tetrahedral arrangement of bonds formed by carbon and its relevance In the interaction of biomolecules occurs because the carbon atom has four electrons in their outermost shell and the four hydrogens has one electron each which result is a total of eight electrons distributed in four bonding orbitals making the structure of tetrahedral and the bond angles between these carbon atoms is approximately 109.5 degree.

a. Radio waves.

Radio waves are the lowest-energy electromagnetic waves. They also have the longest wavelengths and the lowest frequencies. Hope this helps!

Answer:

32.3%

Explanation:

Percent yield is defined as:

Actual yield (125.5g) / Theoretical Yield * 100

To find theoretical yield we have to find the moles of aluminium. As 2 moles of Al produce 2 moles of AlCl3, the moles of Al = Moles AlCl3.

With these moles we can find the mass assuming a 100% of yield (Theoretical Yield) as follows:

Moles Al = Moles AlCl3 (Molar mass Al = 26.98g/mol)

72g Al * (1mol / 26.98g) = 2.67 moles AlCl3

Mass AlCl3 (Molar mass: 133.34g/mol)

2.67 moles AlCl3 * (133.34g / mol) = 355.8g AlCl3

Percent Yield = 125.5g / 355.8g * 100 =

32.3%

Answer:

The correct answer is B

Explanation:

Genetic engineering is an example of which application of because the genes are changed to get the desired features in an organism.

What is genetic engineering?

Genetic engineering is the process in which we alter the genetic makeup of an organism to produce desired characterictics in that organism.

So we can conclude that Genetic engineering is an example of which application of because the genes are changed to get the desired features in an organism.

Learn more about here Genetic engineering: https://brainly.com/question/2780091

Answer:

2.20*4.5=?? you have to solve the multiplication ok, or its not learning

Explanation:

Answer:

Its physical structure

Explanation:

Explanation:

so for this u have to use this equation where

Moles = number of particle/6.02×10^23

= 3.045 × 10^24/6.02×10^23

= 5.0581

write it to 3 S.F so 5.06 moles

Answer:

Coal is burned at power plant.

Explanation:

the chemical Energy is released as coal changes

have a good day

Answer:

2.5×10^20atoms

Explanation:

number of moles= number of particles/Avogadro's constant

number of particles=Avogadro's constant × number of moles

number of particles=(6.02×10^23) × (4.1×10^-4)

number of particles=2.5×10^20

Answer:

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Answer: There are 1566 joules of heat needed to raise the temperature of 30.0 g of aluminum from 22°C to 80°C, if the specific heat of aluminum is 0.90 J/g°C.

Explanation:

Given: Mass = 30.0 g

Specific heat = [tex]0.90 J/g^{o}C[/tex]

[tex]T_{1} = 22^{o}C[/tex]

[tex]T_{2} = 80^{o}C[/tex]

Formula used to calculate the heat energy requires is as follows.

[tex]q = m \times C \times (T_{2} - T_{1})[/tex]

where,

q = heat energy

m = mass of substance

C = specific heat capacity of substance

[tex]T_{1}[/tex] = initial temperature

[tex]T_{2}[/tex] = final temperature

Substitute the values into above formula as follows.

[tex]q = m \times C \times (T_{2} - T_{1})\\= 30.0 g \times 0.90 J/g^{o}C \times (80 - 22)^{o}C\\= 1566 J[/tex]

Thus, we can conclude that there are 1566 joules of heat needed to raise the temperature of 30.0 g of aluminum from 22°C to 80°C, if the specific heat of aluminum is 0.90 J/g°C.

Explanation:

The right answer is C

Hope i could be helpful

the iron and sulfur still behave like iron and sulfur in the mixture, but iron sulfide has different properties from both iron and sulfur.

you can separate the iron from the mixture using a magnet, but this does not work for iron sulfide

Answer:

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Explanation:

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