Un compuesto orgánico que contenía solo H y C fue quemado en corriente de O2, encontrándose que 0.210 g daban 0.660 g de CO2.La densidad del vapor del compuesto es de 1.87 g/dm3 a 273 °K y 1 atm. ¿Cuál es la fórmula molecular?

Answer:

44.10

Explanation:

got it right on odessyware

Answer:

This was not a redox reaction

Explanation:

A redox reaction is one in which a specie is oxidized and another specie is reduced. This means that one specie gains electrons while the other specie looses electrons.

Zinc chloride solid is composed of zinc ions and chloride ions. The ions only become free in solution. There is no change in the oxidation numbers of the ions as they dissolve in water.

Since the oxidation numbers of the species do not change, the process is not a redox reaction

Answer: sodium sulfide

Answer: increasing the number of collisions between reactants

Explanation:

A reaction is possible due to collisions between the reactants to create products. If we increase the concentration of reactants then that means that we are increasing the molecules of the reactants which would give them more chances to collide and make products.

For instance, using a non-chemistry example, if there are few cars in a large city, the accidents there will be less because the cars will have such space that they wouldn't collide with each other. If the number of cars in the city is increased however, there is now less space and more chances for cars to collide.

Answer:

Explanation:

(a) Firstly, caesium abd potassium are both in Group 1 of the periodic table. Group 1 metals (also called alkali metals) are the most reactive metals of the periodic table. Caesium is more reactive than Potassium because it has a higher electropositivity than Potassium. Electropositivity is the tendency of a metal to donate electron(s) to form a cation. Electropositivity increases down the group; this is because it is easier for atoms to loose electrons on the outermost shell that are far away from the central nucleus as against atoms whose outermost electrons are closer to the central nucleus. Thus, the more "bulky" an atom is, the farther it's outermost electrons (valence electrons) get from the central nucleus and the easier it is to lose the outermost electron(s). And the easier it is for the valence electron(s) to be removed, the more reactive the atom would be and vice-versa.

Caesium is more reactive than potassium because it is more bulky than potassium, with an atomic number of 55, while potassium has an atomic number of 19.  

NOTE: The closer an electron is to the nucleus, the more difficult it is to be removed from it's shell.

(b) i. Formula for Caesium Nitrate:

Symbol for Caesium is Cs and Nitrate is NO₃⁻.

Cs⁺ + NO₃⁻  ↔  CsNO₃

Formula for Caesium Nitrate is  CsNO₃

ii. Formula for Caesium sulphate

Symbol for caesium is Cs and Sulphate is SO₄²⁻

Cs⁺ + SO₄²⁻  ↔   Cs₂SO₄  

Formula for Caesium sulphate is Cs₂SO₄

NOTE: When writing the formulae, the charges would be exchanged to form the subscript as seen on the product sides above.

Answer:

ExplaAt high temperatures MgCO3 decomposes to magnesium oxide and carbon dioxide. This process is important in the production of magnesium oxide. This process is called calcining: MgCO3 → MgO + CO2 (ΔH = +118 kJ/mol)

nation:

Answer:

red blood cells and diffusion.

Explanation:

this process involves red blood cells and diffusion. Red Blood cells (RBCs) are a type of blood cell whose role is to transport oxygen from the lungs to the peripheral tissues of the body. Oxygen diffuses from the alveoli of the lungs in to the RBC's, where it binds to hemoglobin.

Diffusion is a very important process within the human body and is essential to the transport of molecules within a number of organs including the lungs, kidneys, stomach and eyes. The lungs process millions of tiny air sacs that are called alveoli, each of which are in close contact with capillaries.

La pregunta está incompleta, la pregunta completa es;

"Para enfriar algo rápidamente, haga una mezcla de hielo cd sal o, si

tenga cuidado, alcohol. El punto de congelación bajará y el hielo

derretir rápidamente. A pesar de parecer haber perdido el frío, la mezcla

formado será en realidad unos pocos grados bajo cero y será

mucho más eficaz para enfriar que los cubitos de hielo sólido. "La

fenómeno reportado corresponde a una consecuencia de: *

una. Aumento del punto de ebullición

B. disminución de la presión de vapor

C. aumento de la presión de vapor

D. disminución del punto de congelación

Answer:

D

Explanation:

Esta pregunta recuerda las propiedades coligativas. Las propiedades coligativas son propiedades de sustancias que dependen de la cantidad de sustancia presente.

El punto de congelación es una propiedad coligativa. Se sabe que la presencia de impurezas reduce el punto de fusión y congelación. Esto se llama depresión del punto de congelación.

Por lo tanto, la observación registrada en la pregunta es el resultado de la disminución del punto de congelación.

Answer:

copper

Explanation:

so for this you can work out the mass for both and compare

so mass = moles × mr

so mass of sodium = 1 × 23= 23 g

and mass of copper = 1 × 63.5= 63.5 g

so copper have more mass :)

Answer:

sry I don't know much about chemistry

Answer:

Rare earth elements are lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium - that appear in low concentrations in the ground.

Explanation:

The rare earth elements (REE) are a set of seventeen metallic elements. These include the fifteen lanthanides on the periodic table plus scandium and yttrium. Rare earth elements are an essential part of many high-tech devices.

Answer:

1) Uranium atoms are split

2) Enrico Fermi creates the first known nuclear chain reaction

3) Atomic bombs are dropped on Japan at the end of WWll

4) The first fusion bomb is tested

5) The first nuclear-powered submarine is put into action

Answer:

Methane

Explanation:

Alkanes have the molecular formula of "CnH2n+2" which means for every carbon molecule there are two hydrogens plus two more. For example when there is one Carbon there are four hydrogens, this molecule is known as "Methane"

Answer:

your image is not proper

Answer:

deez

Explanation:

Answer:

True po

Explaination :

I hope it helps

Answer:

The Ideal gas law

Explanation:

From the given question, we have:

V [tex]\alpha[/tex] [tex]\frac{nT}{P}[/tex]

where each variable has its usual meaning.

Thus,

V = [tex]\frac{nRT}{P}[/tex]

where R is the ideal gas constant

cross multiply to have;

PV = nRT

This implies that the volume of the gas is directly proportional to the number of moles of the gas.

Therefore, the law can be used to determine the relationship between the volume and number of moles is the ideal gas law.

AMSWER IN THE ATTACHMENT.

Answer:

109.7K

Explanation:

Using Charles law equation as follows;

V1/T1 = V2/T2

Where;

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

V1 = 0.67L

V2 = 0.21L

T1 = 350K

T2 = ?

Using the formula above;

0.67/350 = 0.21/T2

0.001914 = 0.21/T2

0.001914T2 = 0.21

T2 = 0.21/0.001914

T2 = 109.7K

Answer:

Grand Tourer  Injection

The first diagram shows the covalent bonds most likely form in a phosphorous trichloride molecule. Hence, option A is correct.

Covalent bonds can be polar or nonpolar depending on the electronegativity difference between the atoms involved. In a nonpolar covalent bond, the electrons are shared equally between the atoms. In a polar covalent bond, the electrons are shared unequally.

Phosphorus trichloride (PCl₃) is a covalent compound that consists of one phosphorus atom and three chlorine atoms. The three chlorine atoms are located in a plane that is perpendicular to the phosphorus atom, forming an equilateral triangle with bond angles of 120°.

The molecule has a trigonal pyramidal shape, with the phosphorus atom at the apex and the three chlorine atoms at the base of the pyramid. The fourth hybridized orbital of phosphorus contains a lone pair of electrons that is located above the trigonal plane, giving the molecule a distorted tetrahedral geometry.

Thus, option A is correct.

To learn more about the covalent bond, follow the link:

https://brainly.com/question/10777799

#SPJ2

Answer:

Yes.

The nuclear equation {226/88 Ra → 222/26 Rn + 4/2 He} is balanced. As we know that an alpha particle is identical to a helium atom. This implies that if an alpha particle is eliminated from an atom's nucleus, an atomic number of 2 and a mass number of 4 is lost.

Therefore, the equation will be reduced to:

226 - 4 = 222

88 - 2 = 86

Hence, the equation is balanced.

Explanation:

Answer:

yes

Explanation:

s]imple yes

Answer:

29

Explanation:

since protons are a constant and unique characteristic of an element it's considered as he atomic number of that element.

Answer:

ClxOy + H2 > HCl + H2O

HCl = 0.233/37 = 0.006 mol H2O = 0.403/180.02 mol

HCl = 0.006/0.022 H2O = 0.022/0.006

= 1 = 4

Cl2O4 + 5H2 > 2HCl + 4H2O

I'm think that's the answer

Answer:

4 is chemical and 6 is a

Explanation:

hope this helps

Answer:

Electrons are lost during oxidation (LEO)

Answer: D

Explanation:

I just did it