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podryga [215]
3 years ago
8

What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large

atoms d. Atoms at the top of the periodic table
Chemistry
2 answers:
r-ruslan [8.4K]3 years ago
5 0

Answer:

large atoms (B)

Explanation:

garri49 [273]3 years ago
4 0

Answer:

large atoms

Explanation:

its kinda obvious

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Scientist think that many species have one common ancestor. Which answer choice best tells why scientists think this way?
BigorU [14]

Answer:

homologous structures.

Explanation:

If you look at many different organisms, you will see similar structures. Like humans have a forearm, birds have a wing, whales have fins, leopards have legs. The bones evolvolved to fit the animal

3 0
3 years ago
F. give some examples of how it might be useful to know the melting or boiling points of a substance. think in terms of both sci
Delvig [45]
Hello!

To know the melting or boiling points of substances is extremely important:

-In a Scientific Setting, it would help identify and separate unknown substances, as the melting or boiling points are unique for each compound, and their determination is useful for identifying and separating them. 

-In an Industrial Setting, it would help engineers to know the storage temperatures of compounds. Some compounds if stored at temperatures above their boiling points will evaporate and when stored at temperatures under their melting points will solidify. In some cases this behavior is undesired and knowledge of boiling and melting points is important. 

Have a nice day!
6 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
HELPPP ASAP PLEASE .
Viktor [21]

Answer:

ok       .

Explanation:

    .

5 0
3 years ago
Many homes in rural america are heated by propane gas, a compound that contains only carbon and hydrogen. Complete combustion of
jek_recluse [69]

Answer:

            C₃H₈

Solution:

Step 1: Calculating Moles for each Element:

C  =  Mass of CO₂ × (1 mol of CO₂÷ M.Mass of CO₂) × (1 mol of C ÷ 1 mol of CO₂)

C  =  2.641 g × (1 mol of CO₂÷ 44.011 g.mol⁻¹) × (1 mol of C ÷ 1 mol of CO₂)

C =  0.0600 mol


H  =  Mass of H₂O × (1 mol of H₂O ÷ M.Mass of H₂O) × (2 mol of H ÷ 1 mol of H₂O)

H  =  1.442 g × (1 mol of H₂O ÷ 18.106 g.mol⁻¹) × (2 mol of H ÷ 1 mol of H₂O)

H =  0.159 mol

Step 2: Calculate the Smallest whole number ratio as,

                                  C                                                        H

                               0.0600                                               0.159

                       0.0600/0.0600                                  0.159/0.0600

                                    1                                                    2.654

Multiply ratio by 3,

                                    3                                                      7.96

Or,

                                    3                                                        ≈ 8

Result:

           Empirical Formula of Propane is C₃H₈

3 0
3 years ago
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