CHEMISTRY HIGH SCHOOL

How would you ask a girl out. I know that I can use my voice, but I don’t know what to say.

Answers

Answer 1

Answer:

Answer:

Just go out there and be yourself brother!

Explanation:

If she doesn't like you, she doesn't like the real you, therefore you don't deserve her! lol

Related Questions

For strontium chloride, the light released when electrons transition between energy levels has a wavelength of 630 nm. Calculate:the wavelength in meters the frequency in Hertz the Energy in Joules
List one extensive and intensive property of marker ink
A liquid is placed in an evacuated, sealed flask. When will this closed system reach dynamic equilibrium?
How many Atoms are in 2.3 g of Na? show your work and these question will take two steps
NEED HELP AS SOON AS POSSIBLE!7. How many atoms are present in a 6.00 g sample of silver? a. 1.07 x 10^-1 atoms b. 6.47 x 10^2 atoms c. 3.35 x 10^22 atoms d. 3.61 x 10^24 atoms 8. How many atoms are present in 2.0 x 10^6 mol of carbon? a. 3.3 x 10^-18 atoms b. 4.0 x 10^-17 atoms c. 1.0 x 10^29 atoms d. 1.2 x 10^30 atoms 9. what mass is present in sample of AgNO3 containing 3.14 x 10^19 formula units? a. 5.21 x 10^-5 g b. 8.86 x 10^-3 g c. 1.13 x 10^2 g d. 1.92 x 10^4 g 10. How many molecules are present in 36.6 L of SO2 gas at STP? a. 1.36 x 10^-21 molecules b. 1.63 x 10^0 molecules c. 1.54 x 10^22 molecules d. 9.84 x 10^23 molecules

Identify whether the following is an example of qualitative or quantitative data. the taste of an apple:

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In this item we are to identify if the taste of an apple is a qualitative or a quantitative data. In reporting the taste of an apple, we usually do not use some scale or anything but we are only describing the taste. Thus, it is a qualitative data.

Data can be broadly divided into two types. Quantitative data is made up of numbers. Qualitative data is made up of descriptions. In this case, the taste of an apple is an example of qualitative data since it does not involve numbers but instead a description.

What energy resource can be used instead of fossil fuel

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We could use solar power, wind power, geothermal power, hydroelectric power, or nuclear power. There are probably more but this is what I can think of off the top of my head. I hope this helps. Let me know if anything is unclear.

Values of Ksp greater than 1.0 infer: 1. The solid phase is relatively insoluble.
2. The solid phase is relatively soluble.
3. The chemical reaction proceeds readily to the right.
4. The chemical reaction proceeds readily to the left.

Answers

Values of Ksp greater than 1.0 infer that the solid phase is relatively soluble. The answer is number 2. If Ksp is less than 1 then the solid phase is relatively insoluble.

Which physical change is endothermic?(1) CO2(s)-->CO2(g) (3) CO2(g)-->CO2(l)
(2) CO2(l)-->CO2(s) (4) CO2(g)-->CO2(s)

Answers

Answer: The correct option is 1.

Explanation:Endothermic reactions are the reactions in which heat is provided to break down the reactant molecules.

In option 1:

The stronger intermolecular forces between the particles in solid molecule are broken down to convert into gaseous form. Hence, some energy in the form of heat is provided to move them far apart. Therefore, it is considered as an endothermic reaction.

In option 2, 3 and 4:

All the other processes involves the formation of bonds and thus there is no need to provide any energy.

The physical change that is endothermic is $\boxed{\left( 1 \right){\text{ C}}{{\text{O}}_{\text{2}}}\left( s \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( g \right)}$ .

Further explanation:

Changes are of two types:

(A) Physical changes:

It is the process in which the physical properties of the system are affected. These changes can also be reversed by physical methods. In these kinds of changes, the molecular composition of the substance remains the same. These are reversible in nature and no new substances are formed. For example, boiling of water, chopping of wood, melting of wax are physical changes.

(B) Chemical changes:

In this change, new substances are formed by the chemical combination of the previous substances. The chemical properties of substance changes when it undergoes a chemical change. These are irreversible in nature. For example, fermentation of grapes, burning of wood, rusting of iron are chemical changes.

Endothermic reactions are those in which more energy needs to be supplied to the system than that released by it.

Exothermic reactions are those in which more energy is released by the system than that supplied to it.

(1) ${\text{C}}{{\text{O}}_{\text{2}}}\left( s \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( g \right)$

In this reaction, solid carbon dioxide is converted into gaseous carbon dioxide. The strong intermolecular force of attraction in solid needs to be broken down and energy is supplied for this purpose. Hence this is an endothermic process.

(2) ${\text{C}}{{\text{O}}_{\text{2}}}\left( l \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( s \right)$

In this reaction, liquid carbon dioxide is converted into solid carbon dioxide. The intermolecular forces in liquid molecules are weaker than that present in solid molecules and are broken down easily so energy is released during the process. Hence this is an exothermic process.

(3) ${\text{C}}{{\text{O}}_{\text{2}}}\left( g \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( l \right)$

In this reaction, gaseous carbon dioxide is converted into liquid carbon dioxide. The intermolecular forces in gas molecules are weaker than that present in liquid molecules and are broken down easily so energy is released during the process. Hence this is an exothermic process.

(4) ${\text{C}}{{\text{O}}_{\text{2}}}\left( g \right) \to {\text{C}}{{\text{O}}_{\text{2}}}\left( s \right)$

In this reaction, gaseous carbon dioxide is converted into solid carbon dioxide. The intermolecular forces in gas molecules are weaker than that present in solid molecules and are broken down easily so energy is released during the process. Hence this is an exothermic process.

Learn more:

1. Which of these is an extensive property? brainly.com/question/1398514

2. Which of the phase changes is an exothermic change? brainly.com/question/1875234

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Physical and chemical changes

Keywords: physical change, chemical change, CO2, endothermic, exothermic, solid, liquid, gaseous, intermolecular forces, strong, weaker.

Define physical change and chemical change and give examples of each type of change

Answers

Physical change does not change the composition of the substance for example: water to ice, evaporation of gasoline

Chemical change does change the composition of the substance for example: leaves changing color in fall, when you burn wood or gasoline

A student observed that the rate of a chemical reaction increased as the temperature of the system increased. Which of the following statements best explains why thermal energy caused an increase in the reaction rate?A. The surface area of the product particles decreased.
B. The collision rate of the reactant particles increased.
C. The concentrations of the reactant particles increased.
D. The concentrations of the product particles decreased.

Answers

B, The increased thermal energy makes the particles move faster, making more collisions possible.

The answer is "B. The colllision rate of the reactant particles increased." because as you increase the temperature, the particles move faster and the faster the the particles move, the faster their collision rate.!!!

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While out on a hike, you find an unknown mineral. how would test the mineral to find out what it is?