Answer:
grams per milliliter.
Explanation:
While any units of mass and volume can be used to calculate density the most common are grams (g) and milliliters (ml). This gives density the units of grams per milliliter (g/ml).
Answer:
energy is released as potential energy decreases
Explanation:
EGD2020
B. Jupiter
C. Mars
D. Neptune
Answer: Jupiter is believed to have prevented the asteroids in the asteroid belt from forming a planet.
Answer
1.60217662 × 10-19 coulombs
Explanation:
.
(2) C6H12O(s) and HCl(g)
(3) KI(s) and NaCl(s)
(4) NaCl(s) and HCl(g)
Answer is: (2) C6H12O(s) and HCl(g).
Covalent bond is bond between nonmetals.
Carbon, hydrogen, chlorine and oxygen are nonmetals.
Hydrogen chloride (HCl) has polar covalent bond between hydrogen and chlorine.
Potassium iodide (KI) and sodium chloride (NaCl) are ionic compounds.
Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).
Among the four options, option (2) C6H12O(s) and HCl(g) represent covalent compounds as they consist only of nonmetals.
The question asks which of the given sets of substances are covalent compounds. Covalent compounds are formed when two nonmetals combine. By looking at the given options, option (2) C6H12O(s) and HCl(g) correspond to covalent compounds. C6H12O(s) is glucose, a sugar composed of carbon (C), hydrogen (H), and oxygen (O) - all nonmetals. Likewise, HCl(g) is hydrochloric acid, composed of hydrogen (H), a nonmetal, and Chlorine (Cl), another nonmetal. The other options include substances like KI and NaCl which are ionic compounds, not covalent, because they are formed from a metal and nonmetal.
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(1) Rb (3) Si
(2) Rn (4) Sr
Element which has both metallic and non-metallic properties is silicon as it is a metalloid.
Metalloids are defined as the elements which possess properties of both metals as well as non-metals.These elements are present only in the p-block of the periodic table.
In the p-block of the periodic table, these are the elements which separate the metals from the non metals by forming a zig-zag line between them.
These elements have 4 electrons in their valence shell which indicates that they can neither loose nor accept electrons rather share them between the 2 atoms.
As the elements are present between metals and non-metals they resemble both categories of elements in terms of their properties.They usually possess metallic appearances but are brittle.
Chemically, the behave as non-metals and have a characteristic property of forming alloys.They can form amphoteric or weakly acidic oxides.
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a. Volcanoes always contribute to flooding, which enriches the soil.
b. Volcanoes aid in the formation of new rocks, which help form fertile soil.
c. Particles released in the air by volcanoes fall to the ground and enrich the soil.
Answer:
The correct statement is option c, that is, particles discharged in the air by volcanoes fall to the ground and enrich the soil.
Explanation:
The eruptions of volcanoes lead to the dispersion of ash over the broader regions surrounding the site of eruption. On the basis of the chemistry of the magma, the ash will be comprising different concentrations of soil nutrients. While the major elements found in the magma are oxygen and silica, the eruptions also lead to the discharging of carbon dioxide, water, hydrogen sulfide, sulfur dioxide, and hydrogen chloride.
In supplementation, the eruptions also discharge bits of rocks like pyroxene, potolivine, amphibole, feldspar that are in turn enriched with magnesium, iron, and potassium. As an outcome, the areas which comprise huge deposits of the volcanic soil are quite fertile.
Answer:
Option (C)
Explanation:
The volcanic eruptions are usually very destructive but it also has some advantages of which, one is that it makes the soil fertile in the nearby region.
During the time of the volcanic eruption, a large number of pyroclastic materials, blocks and ashes that are comprised of various gases are released, which eventually adds to the soil of the nearby areas. These materials ejected from the volcano are rich in various minerals such as oxygen, silicon, and some amount of CO₂, SO₂, and HCl which facilitates the growth of the soil and increases its productivity.
Thus, the soil around a volcanic region is much fertile.
Hence, the correct answer is option (C).