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SVEN [57.7K]
3 years ago
15

This is for anyone who’s good with science coz I absolutely hate it. ILL BRAINLIST U AND GIVE U 5 STAR TO WHOEVER IS GOOD;) be s

pecific and use ur own words please! thankyou. and good luck LOL.
conclusions:

The burning candle is an example of a combustion reaction.
a) What do all combustion reactions require?
b) What do all combustion reactions produce?
c) Write a general word equation for the combustion reaction.
Chemistry
2 answers:
marin [14]3 years ago
6 0

Answer:

a) oxygen is nessasary for all combustion to occur

b)carbon dioxide and water

c)for example combustion of methane:

<h3>CH4+2O2 -------> CO2+H2O</h3>
marusya05 [52]3 years ago
4 0

Answer:

A) Oxygen

B) Heat

C)

Explanation:

Hope it helps

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List two general properties of molecular compounds
Katen [24]

Low melting points and boiling points. ...Low enthalpies of fusion and vaporization These properties are usually one or two orders of magnitude smaller than they are for ionic compounds.Soft or brittle solid forms. ...Poor electrical and thermal conductivity.
5 0
4 years ago
8) Which one of the following can be broken down in to simpler substances<br>​
Sophie [7]

Answer:

Compounds can be broken down into simpler substances by chemical means, but elements cannot. break a compound into simpler substances; oxygen and hydrogen that water contains.

But where is the following?

3 0
3 years ago
Number of
SpyIntel [72]

Answer:

A = 8

B = 8

C = O ( Oxygen )

D = 26

E = 30

F = Fe (Iron)

Explanation:

1)To get "A" we use the following formula

mass number = number of protons + number of. neutrons

15 = number of protons + 7

15 - 7 = number of protons

8 = number of protons

A = 8

2)To find "B"

atomic number = number of protons

Atomic number = 8

B = 8

3)To find "C"

the atomic number is 8 so the element which

has 8 atomic number on periodic table is Oxygen.

C = oxygen

4) To get "D"

Number of protons = atomic number

number of protons = 26

D = 26

5)To get "E"

mass number = number of protons + number of. neutrons

56 = 26 + number of neutrons

56 - 26 = number of neutrons

number of neutrons = 30

E = 30

6) To find "F"

The atomic number is 26 so the element which has 26 atomic number on periodic table is Iron.

hope it helps

for any question comment me ❤❤

4 0
3 years ago
¿recuerdas cuales son los principales sistemas que conforman nuestro cuerpo y sus funciones generales? ​
mixer [17]

Answer:

Los principales sistemas del cuerpo humano son: nervioso, endocrino, circulatorio, digestivo, excretor, respiratorio,  reproductor, muscular, esquelético, linfático, integumentario e inmunológico

Explanation:

En el cuerpo humano, las células se organizan en tejidos, los cuales a su vez forman órganos y finalmente dichos órganos forman sistemas de órganos que llevan a cabo funciones de forma conjunta.

Los principlales sistemas de órganos y sus funciones son los siguientes:

- nervioso: controla los impulsos nerviosos, controlando tanto los movimientos voluntarios del cuerpo como también las funciones cognitivas.

-endócrino: regula diferente funciones del organismo (como por ejemplo, el crecimiento) a partir de la secreción de sustancias químicas denominadas hormonas

-circulatorio: encargado de llevar nutrientes y eliminar desechos de los tejidos a través de la sangre  

-digestivo: encargado de la obtención de nutrientes a través del proceso de digestión de alimentos

-respiratorio: intercambia gases con el medio exterior, obteniendo oxígeno y eliminando dióxido de carbono

-excretor: elimina los desechos del organismo

-reproductor: encargado de perpetuar la especies mediante el mecanismo sexual de reproducción

-muscular: responsable de los movimientos voluntarios e involuntarios  

-esquelético: provee un sostén físico a las diferentes partes del cuerpo  

-inmunológico: encargado de eliminar microorganismos patógenos

-linfático: también implicado en la defensa del organismo contra microorganismos patógenos  

-integumentario: provee una capa que protege al organismo de agentes externos como, por ejemplo, los rayos solares

8 0
3 years ago
What does the Periodic Table tell us about?
Ronch [10]

The periodic table lists all the elements, with information about their atomic weights, chemical symbols, and atomic number. The arrangement of the periodic table leads us to visualise certain trends among atoms.

6 0
3 years ago
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