How long does it take for a purple stem plant to grow

What is the molarity of 1.5 liters of an aqueous solution that contains 52 grams of lithium fluoride, LiF, (gram-formula mass =2

denis23 [38]

The answer is (1) 1.3 M. The first thing you need to do is to convert the unit of gram to mole. The mol number of LiF is 52/26=2 mol. Then using the volume to calculate the molarity: molarity=2/1.5=1.3 M.

5 0

4 years ago

Which of the following carbon-based molecules stores information

Eduardwww [97]

The following carbon-based molecules store information are found in living things.

All organism are made of 4 type of carbon-based= carbon hydrate, lipids, proteins, and nuclear acid

8 0

4 years ago

Please help its due at 2

Verizon [17]

Answer:

3. One example of condensation is dew forming on grass or leaves early in the morning when the air is cooled/cooling.

4. This is called freezing. For example, when water turns into ice (a solid) because it freezes.

5. This is called melting. The butter reached its melting point and turned into a liquid.

6. Adding or removing energy causes changes in states of matter. Temperature for example can cause melting and freezing.

7. Water which collects as droplets on a cold surface when humid air is in contact with it.

8. Evaporation/vaporization

9. before- particles are compact

during- particles vibrate

after- the particles move freely

10. condensation because it is going from gas into a liquid

11. Evaporation, I know because when liquid gets heated after a period of time and it reaches its boiling point, it will begin evaporating.

12. When a solid is heated the particles gain energy and start to vibrate faster and faster. ... Although the particles are still loosely connected they are able to move around. At this point the solid is melting to form a liquid. The particles in the liquid are the same as in the solid but they have more energy.

13. Sublimation is the process of transformation directly from the solid phase to the gaseous phase, without passing through an intermediate liquid phase.

14. freezing because particles are becoming compact and getting slower because of decrease in temperature

15. Examples are mothballs, dry ice, snow in the winter months, freeze-drying (ice crystals in a frozen food bag), air fresheners, and printers that print out high-resolution images.

16. Try and think of it in terms of the molecules. The temperature is such that the molecules are all bound together into a solid. Occasionally a surface molecule picks up enough energy to break it bond,.. a statistical probability ,and drifts away. The overall temperature of the solid is reduced by that event,as temperature is just an average of the energy. A little more heat flows into the material ,from the ambient environment, and another molecule escapes, and so the process continues….. if the concentration of the molecules in the vapour space above the solid, is low the reverse process of molecules condensing onto the surface,and releasing energy back into the solid is low.

Explanation:

sorry it took a little bit, it wouldnt let me copy and paste what i had typed /:

8 0

4 years ago

*PLEASE HELP*

slava [35]

1 Double displacement

2 A) a reaction in which the exchange of electrons (or oxygen) occurs

3 A) Silver has a lower activity than hydrogen and cannot replace it.

4 C) 2C₂H₆ + 7O₂ → 4CO₂ +6H₂O

5. two

6.C) redox

7.B) The ions of two ionic compounds switch places and a gas is formed.

Explanation:

Problem 1:

Equation of the reaction:

Na₂S + Cd(NO₃)₂→CdS + 2NaNO₃

The above reaction is a double displacement reaction in which ions of two ionic compounds changes position to form new products.

A double displacement reaction is also known as metathesis.

The reaction involves actual exchange of partners to form new products.
In most double displacement reactions, precipitates are usually formed.
There might also be formation of water and any non-ionizing compound.
liberation of a gaseous product.

Learn more:

precipitates brainly.com/question/8896163

Question 2

A) a reaction in which the exchange of electrons (or oxygen) occurs:

Redox reactions are reactions in which one species is reduced and another species is oxidized simultaneously.

In this reaction types, there is exchange of electrons between reacting species.
In non-redox reactions, there is no exchange or transfer of electrons.
Redox reactions involves the transfer of electrons in which a specie gains and the other loses.

Learn more:

Oxidation brainly.com/question/2086855

Question 3:

A) Silver has a lower activity than hydrogen and cannot replace it.

H₂O + Ag→no reaction

The reaction above is a single replacement reaction

The replacement of a metallic ion in solution by a metal higher in the activity series than the metal in solution is this kind of reaction.
The positions of the two elements in the activity series provides the driving force for this reaction.
Hydrogen is higher than Ag in the reactivity series.
Since hydrogen is more reactive, Silver cannot displace it and the reaction will not occur.

Learn more:

Reactivity brainly.com/question/2193659

Question 4:

4 C) 2C₂H₆ + 7O₂ → 4CO₂ +6H₂O

Solution:

C₂H₆ + O₂→CO₂+H₂O

For combustion reactions in hydrocarbons, we use the expression below:

CₓHₙ + x + $\frac{n}{4}$ O₂ → xCO₂ + $\frac{n}{2}$ H₂O

x = 2 , n = 6

x + $\frac{n}{4}$ = 2 + $\frac{6}{4}$ = $\frac{7}{2}$

$\frac{n}{2}$ = $\frac{6}{2}$ = 3

multiply the coefficients by 2:

2, 7, 4 and 6

learn more:

Combustion brainly.com/question/1971314

Question 5

four

2NaNO₃ + CaCl₂ → 2NaCl + Ca(NO₃)₂

To find the number of atoms of Na, we must understand what an atom really is;

An atom is the smallest particle of an atom that takes part in chemical reaction. Distinct elements are made up unique types of atoms.

In the above reaction, we have:

2moles of NaNO₃ on the left hand side:

we have 2 Atoms of Na,

2 atoms N

6 atoms of O

2 moles of NaCl contains:

2 atoms of Na

2 atoms of Cl

In all, we have 4 atoms of Na

learn more:

Atoms brainly.com/question/10216585

Question 6

C) redox

AgNO₃(aq)+Cu(s)→Ag(s)+Cu(NO₃)₂(aq)

In a redox reaction, a specie is reduced and another is oxidized in the reaction.

In this reaction, one specie loses electrons and the other gains it.
Certain reactants change their oxidation state so as to form products.

In the reaction above,

Ag undergoes reduction; it goes from Ag⁺ to Ag from a +1 to zero.

whereas Copper goes from O to 2+ oxidation state.

Actually, this reaction is more appropriately described as a single displacement reaction in which atom higher in the activity series displaces the lower one.

learn more:

Redox Oxidation brainly.com/question/2086855

Question 7:

B) The ions of two ionic compounds switch places and a gas is formed.

A double displacement reaction is also known as metathesis or double replacement reaction.
It usually involves ionic compounds.
The reaction involves an exchange of partners to form new compounds.

One of the following serves as driving force for double displacement reactions:

formation of an insoluble compound called precipitate
formation of water or any other non-ionizing compound
liberation of a gaseous product.

Learn more:

Precipitate formation brainly.com/question/8896163

#learnwithBrainly

7 0

3 years ago

If measurements are all consistent, such as 3.4, 3.6, 3.5, these numbers are said to have

barxatty [35]

A I think I’m sorry I’m not sure

8 0

3 years ago