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Vika [28.1K]
3 years ago
5

PLEASE HELP WITH EASY SCIENCE!

Chemistry
2 answers:
erastovalidia [21]3 years ago
5 0
The answer is B. dependent variable.
tiny-mole [99]3 years ago
4 0

Answer : Option B) Dependent variable.

Explanation : In this experiment the growth of pea plants is a dependent variable because, it depends upon the light which is available to it. As in the experiment James took two pea plants, and placed one in a dark closet and the other on a sunny window sill. Both were located in air-conditioned rooms. But the growth of the plant differs because of the light availability to it. Therefore, it is a dependent variable.

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Teniendo en cuenta los siguientes fenómenos: ebullición del agua- movimiento de un cuerpo- disolución de sal en agua- combustión
miv72 [106K]

Answer:

Las siguientes son reacciones químicas;

combustión de leña

oxidación del hierro

descomposición del agua en hidrógeno y oxígeno

Explanation:

Una reacción química da como resultado la formación de una (s) sustancia (s) nueva (s), mientras que un cambio físico no conduce a la formación de una sustancia nueva.

Las siguientes son reacciones químicas;

combustión de leña: la combustión de madera implica la oxidación del carbono según la reacción; C (s) + O2 (g) -------> CO2 (g)

oxidación del hierro: La oxidación del hierro conduce a la formación de óxidos de hierro. Como; 2Fe (s) + O2 (g) ----> 2FeO (s)

descomposición del agua en hidrógeno y oxígeno: esta es una reacción química en la que el agua se descompone de la siguiente manera; 2H2O (l) -----> 2H2 (g) + O2 (g)

Todos estos procesos enumerados anteriormente conducen a la formación de nuevas sustancias, por lo tanto, son reacciones químicas.

3 0
2 years ago
Why are alloys generally used to make everyday objects
dezoksy [38]
Chem bonds by exchanged charges create new characteristics as a result
4 0
3 years ago
A typical virus is 5x10-6 cm in diameter. if avogadro's number of these virus particles were laid in a row, how many kilometers
Debora [2.8K]
Answer is: line be long 3,011·10¹³ kilometers.
diametar of virus = 5·10⁻⁶ cm ÷ 100000 = 5·10⁻¹¹ km.
line lenght = 5·10⁻¹¹ km · 6,023·10²³.
line lenght = 3,011·10¹³ km.
Avogadro number = 6,023·10²³.
1 cm = 10⁻² m = 10⁻⁵ km.
8 0
3 years ago
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a small deviation from the resting membrane potential that occurs because ligand-gated or mechanically-gated channels open or cl
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Imagine not knowing xhit your literally adc
4 0
3 years ago
Group 17 elements (for example, chlorine) in the periodic table are known as
BaLLatris [955]

Explanation:

The answer is halogens

Halogens are reactive non metallic elements that form strongly acidic compounds with Hydrogen to form simple salts

4 0
3 years ago
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