Which statement best describes the process of Condensation___________. *

gas turns to liquid
gas turns to solid
liquid turns to gas
solid turns to gas

Answer:

The eccentricity of the ellipse is 0.252.

Explanation:

The eccentricity of an ellipse ([tex]c[/tex]), dimensionless, can be determined by means of the following expression:

[tex]e = \frac{\bar c}{\bar a}[/tex] (1)

Where:

[tex]\bar c[/tex] - Distance between the foci, dimensionless.

[tex]\bar a[/tex] - Length of the major axis, dimensionless.

If we know that [tex]\bar c = 5.2[/tex] and [tex]\bar a = 20.6[/tex], then the eccentricity of the ellipse is:

[tex]e = \frac{5.2}{20.6}[/tex]

[tex]e = 0.252[/tex]

The eccentricity of the ellipse is 0.252.

Answer:

It decreases.

Explanation:

I just took the test.

Answer:

3s^1 would be 3s^2

Explanation:

Answer:

.     (3 pts each) Carry out the following operations, and express the answer with the appropriate number of significant figures:

a.      1.24056 + 75.8 =

1.24056

             +75.8      

              77.04056  -> Round to tenths place:  77.0

b.     320.55 – (6104.5/2.3) =

   320.55

 -2654.1304

 -2333.580  -> round to HUNDREDS place: -2300 or -2.3 x 103

c.      (0.0045 x 20,000.0) + (2813 x 12) =

    90.000

+33756.000

 33846.000 -> round to TEN THOUSANDS place: 34000 or 3.4 x 104

The all-time record lowest temperature ever recorded on this planet is –57.63 oC (recorded on July 21, 1983 in Vostok, the Russian Antarctic station).

a.     Express this temperature in oF.

oF = (9/5)oC + 32

   = (9/5)(-57.63) + 32 = -71.734 oF à -71.73 oF

b.     Express this temperature in Kelvins (K).

K = oC + 273.15

  = -57.63 + 273.15 = 215.52 K à 215.52 K

3.     (10 pts) A 26.27-g sample of a solid is placed in a flask. Toluene, in which the solid is insoluble, is added to the flask so that the volume of the solid and liquid together is 50.00 mL. The solid and liquid toluene together weigh 52.65 g. The density of toluene at the temperature of the experiment is 0.864 g/mL. What is the density of the solid?

solid + toluene =   52.65 g

          solid =   26.27 g

Mass of toluene =   26.38 g toluene

     26.38 g toluene x 1 ml toluene     = 30.53241 mL toluene

             0.864 g toluene

solid + toluene =   50.00 mL

        toluene =   30.53241 mL

          solid =   19.46759 mL

density of the solid = 26.27 g

                      19.46759 mL

                     = 1.34942 g/mL à 1.35 g/mL

4.     (16 pts) Fill in the gaps in the following table:

Symbol

52Cr3+

107Ag+

75As3-

Protons

24

47

33

Neutrons

28

60

42

Electrons

21

46

36

Net Charge

3+

1+

3-

.     (2 pts each) From this list of elements: Ar, H, Ga, Al, Ca, Br, Ge, K, O; pick the one that best fits each of the following descriptions. You may use each element only ONCE.

a.     an alkali metal:                           K                 

b.     an alkaline earth metal:              Ca              

c.     a noble gas:                                Ar              

d.     a halogen:                                  Br              

e.     a metalloid:                                Ge              

f.      a nonmetal listed in group IA:      H                 

g.     a metal that forms a 3+ ion:        Al              

h.     a nonmetal that forms a 2- ion:   O                 

i.       an element that resembles aluminum:   Ga    

6.      (1 pt each) Give the atomic symbol for the following elements:

a.     calcium:                  Ca               

b.     sodium:                  Na               

c.     mercury:                 Hg               

d.     lead:                       Pb               

3 pts each) Write a complete, balanced chemical equation for each of the following reactions:

a.     Solid calcium carbide (CaC2) reacts with water to form an aqueous solution of calcium hydroxide and acetylene gas (C2H2).

HOPE THIS HELPS YOU OUT :3

Answer:

a , b , c are chemical equations

Answer:

D) both the solid and the liquid phase

Explanation:

Metallic substances will conduct electricity in both the solid and liquid phase. Metals are generally conductors of heat and electricity.

Answer:

the answer is B i just took the test on edge <3

Explanation:

because it do what it do

Answer:

The Answer is A on Edge 2021

Explanation:

I took the unit test exam and got a 100%

Answer:

All living things use cellular respiration to turn organic molecules into energy. ... This process makes energy from food molecules available for the organism to carry out life processes. Cellular respiration usually occurs in the presence of oxygen. This is called aerobic respiration.

Answer:

A,B,C,D

Explanation:

all of the above : )

if you had to go with a certain answer go with C im most sure of

A weak acid will not completely dissociate in water due to strong forces

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 0.835 × 3.50 = 2.9225

We have the final answer as

Hope this helps you

Answer: false

Explanation: atomic mass

Answer:

because electron is a negetively charge particle that orbits the outer part of atom and despite being small it is a strong proton.

Explanation:

Answer:

E = 19.89 × 10⁻¹³ J

Explanation:

Given data:

Wavelength of gamma ray= 1.0× 10⁻¹³ m

Energy of gamma ray = ?

Solution:

Formula:

E = h c/λ

h = plancks constant  = 6.63× 10⁻³⁴ js

c = speed of light = 3 ×10⁸ m/s

by putting values,

E = 6.63× 10⁻³⁴ js × 3 ×10⁸ m/s /1.0× 10⁻¹³ m

E = 19.89 × 10⁻²⁶ J.m/ 1.0× 10⁻¹³ m

E = 19.89 × 10⁻¹³ J

The metal = Platinum(Pt)

FCC : Face centered cubic : the unit structures of the unit cell((other than BCC, HCP)

In FCC ⇒ atoms on every corner and side (total 4 atoms)

The length of the face diagonal (b) = 4 times the atomic radius  (r)

Formula :

[tex]\tt b=4r[/tex]

[tex]\tt a=r\sqrt{8}[/tex]

[tex]\tt V=16r\sqrt{2}=a^3[/tex]

[tex]\tt \rho=\dfrac{n.Ar}{V.No}[/tex]

Ar = atomic mass, g/mol

No = Avogadro number = 6.02.10²³

n = number of atoms

V = volume (cm³)

a = side length  

b = diagonal of the side surface  

r = atomic radius

a= 392 pm=3.92 x 10⁻⁸ cm

ρ = 21.45 g/cm³

[tex]\tt V=a^3\\\\V=(3.92\times 10^{-8})^3\\\\V=6.024\times 10^{-23}~cm^3[/tex]

The atomic mass :

[tex]\tt 21.45~g/cm^3=\dfrac{4\times Ar}{6.024\times 10^{-23}\times 6.02\times 10^{23}}\\\\Ar=194.47\approx 195~g/mol[/tex]

radius :

[tex]\tt a=r\sqrt{8}\\\\3.92\times 10^{-8}=r\sqrt{8}\\\\r=1.386\times 10^{-8}~cm[/tex]

Element with atomic mass 195 g/mol and radius = 139 pm (1.386x10⁻⁸cm) = Platinum(Pt)

Answer:

See explanation

Explanation:

We know that

pH = - log [H^+]

but [H^+] = 1.15x10^-2M

Hence;

pH =  - log(1.15x10^-2)

pH = 1.94

And;

pH + pOH = 14

pOH = 14-pH

pOH = 14 - 1.94

pOH = 12.06

Since;

pOH = - log [OH^-]

hence;

[OH^-] = Antilog (-pOH)

[OH^-] = Antilog (12.06)

[OH^-] = 8.7 * 10^-13 M

Answer:

All the atoms in its structure are linked to each other by strong covalent bonds. The atoms are joined to each other in a regular arrangement, forming a giant covalent structure. There is no set number of atoms joined together in this type of structure.

Explanation:

All the atoms present in  silicon(IV) oxide are linked together  by covalent bonds as there is slight difference in electronegativity of silicon and oxygen atoms.

Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.

Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.

Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.

Learn more about covalent bond,here:

https://brainly.com/question/19382448

#SPJ2

Answer:

D- a base

Explanation:

edge 2021

Soap has the base properties in its composition that make it slip on the hand.

The most commonly used are sodium hydroxide (NaOH), potassium hydroxide (KOH) and sodium carbonate (Na2CO3). All are solid and white in color. Additives: in general, these are the products that provide the soap's fragrances and coloring.

They are chemical compounds (lipids) originated from the reaction between glycerol (alcohol) and saturated or unsaturated fatty acids, which have long chains, containing a carboxyl group at one end.

See more about soap at brainly.com/question/14765205

Answer:

A. Adhesion

Explanation:

The prefix ad- means "to, toward". Most terms like that describe something connect to another.

Answer:

B. Cohesion

Explanation:

A water drop is composed of water molecules that like to stick together-an example of the property of cohesion

Answer: Stay the same

Explanation:

Boyle's law is one of the fundamental gas laws, that describes the state of an ideal gas at a constant temperature. It states that the volume of a gas is inversely proportional to the external pressure applied at a constant temperature.

If a sample of air in a closed container was heated, the total pressure of the air would increase.

Let's suppose we have a sample of air in a closed container. We heat the container and we want to predict what would happen to the pressure.

According to Gay-Lussac's law, the pressure of a gas is directly proportional to its absolute temperature.

[tex]P \propto T[/tex]

Thus, if we increased the temperature of the air by heating it, its pressure would increase.

If a sample of air in a closed container was heated, the total pressure of the air would increase.

Learn more: https://brainly.com/question/23830485

Answer:

See the answer below

Explanation:

No, water cannot be used to remove stains from the permanent makers. However, alcohol can be used.

Since the inks of permanent markers are insoluble in water, trying to clean a stain created by a permanent marker with water would be a waste of effort. Only alcohols can be used to successfully remove the stain because the inks will dissolve in the alcohols.

Answer:

2nd one

Explanation:

Answer:

The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide) and was developed by Carl Josef Bayer. Bauxite, the most important ore of aluminium, contains only 30–60% aluminium oxide (Al2O3), the rest being a mixture of silica, various iron oxides, and titanium dioxide.

Answer:

1. B

2. C

Explanation:

1. There are 15 electrons which means that the element is phosphorus. We know it is in the excited state because an electron from the second ring has moved to the third one, typically it would be 2 - 8 - 5.

2. An element with 3 valence electrons will be 3 spaces from the left side of the periodic table. Sodium is 1, Magnesium is 2, Aluminium is 3, and Silicon is 4. Noble gasses on the right have all 8.

Answer: 70 percent

About 97 percent of Earth's water is in the ocean.

The ocean covers more than 70 percent of the surface of our planet. It's hard to imagine, but about 97 percent of the Earth's water can be found in our ocean. Of the tiny percentage that's not in the ocean, about two percent is frozen up in glaciers and ice caps.

Hope this helps...... Stay safe and have a Merry Christmas!!!!!!!!!!! :D

Explanation:

Answer:

Explanation:

Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances. Tin, sulfur, and diamond are examples of pure substances that are chemical elements.

Answer:

Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances. Tin, sulfur, and diamond are examples of pure substances that are chemical elements

Explanation:

Answer:

The part of the atom that is involved in bonding is Valence electrons.