Answer:The mineral that reacts to hydrochloric acid (HCl) only when powdered is calcite. Calcite is a carbonate mineral composed of calcium carbonate (CaCO3). When calcite is in its powdered form, it readily reacts with hydrochloric acid to produce carbon dioxide (CO2), water (H2O), and calcium chloride (CaCl2). This reaction can be described by the chemical equation:
CaCO3 (s) + 2HCl (aq) → CO2 (g) + H2O (l) + CaCl2 (aq)
The reaction occurs because the surface area of the powdered calcite is increased, allowing for a greater contact area between the mineral and the hydrochloric acid. This increased contact area facilitates a faster and more vigorous reaction compared to when the calcite is in its solid, non-powdered form.
It's important to note that not all minerals react with hydrochloric acid. Only minerals that contain carbonate ions (CO3^2-) will react with hydrochloric acid to produce carbon dioxide gas. Other common minerals that exhibit this reaction include limestone and marble, which also contain calcium carbonate.
By understanding this reaction and its characteristics, you can identify calcite and other carbonate-containing minerals by their reaction to hydrochloric acid when in powdered form.
Calcite is a mineral that reacts to hydrochloric acid (HCl) only when powdered. This reaction produces carbon dioxide gas.
The mineral that reacts to hydrochloric acid (HCl) only when powdered is calcite.
When solid calcite is exposed to hydrochloric acid, it does not undergo any noticeable reaction. However, when powdered calcite is mixed with HCl, it readily fizzes and releases carbon dioxide gas.
This reaction occurs because the acid dissolves the calcite, converting it into dissolved calcium ions and carbon dioxide gas.
Learn more about Calcite mineral reaction with hydrochloric acid here:
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b. 3d
c. 3s
d. 2f
Certain conditions provide less than 10% yield of NH3 at equilibrium. Which statement describes this equilibrium?
This equilibrium has a low yield of NH3 and can be improved by adjusting the conditions and using the principles of Le Chatelier.
This equilibrium can be described as an equilibrium with a low yield of NH3. The fact that less than 10% yield of NH3 is obtained suggests that the forward reaction (N2(g) + 3H2(g) -> 2NH3(g) + energy) is not favored under the given conditions. To increase the yield of NH3, the conditions can be adjusted to shift the equilibrium towards the product side.
The Le Chatelier's principle can be applied to achieve a higher yield of NH3. One possible way is to increase the concentration of the reactants (N2 and H2) or decrease the concentration of the product (NH3). Another way is to increase the temperature, as this reaction is exothermic. By increasing the temperature, the equilibrium will shift in the reverse direction to consume the excess energy.
In summary, this equilibrium is characterized by a low yield of NH3, which can be improved by adjusting the conditions and using the principles of Le Chatelier.
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b. gas tail
c. dust tail
d. Giant Red Spot
Answer: Ocean surface wind
Explanation: Ocean surface wind are generated in the ocean due to the abrasion or rubbing between the prevailing wind and the surface waves. They are formed at the top of the ocean surface.
When the wind is very strong, it generates surface waves of bigger wavelength and bigger height. But at the bottom, the waves moves at a slower rate. This waves are formed due to the wind.
This waves can rise upto hundreds of feets during tsunamis. Thus, this waves breaks as they reach the shoreline.
Show calculation steps
Answer:
Conversion gives 42,107 km in total
Explanation:
A marathon covers 26 miles and 285 yards.
If 1 kilometer is 0.6214 miles, then how many kilometers are 26 miles, then:
1 km = 0.6214 miles
X = 26 miles
X = 41,841 km
Now if 1 yard is 36 inches, how many inches is 285 yards?
1 yard = 36 inches
285 yards = X
X = 10260 inches
If an inch is equal to 2.54 cm, how many centimeters are 10260 inches?
1 inch = 2.54 cm
10260 cm = X
X = 26060.4 cm
And 26060.4 cm is 0.260604 km
Finally, the sum of the distance would be:
41.841 km + 0.260604 km = 42.107 km
It's easier for elements with low ionization energy to form cations. Examples include elements in the first group of the periodic table such as Lithium and Sodium. As more electrons are removed from an atom, the ionization energy increases due to stronger electrostatic attraction.
In the context of ion formation, it is easier for an element with low ionization energy to form a positive ion or a cation. Ionization energy is the minimum amount of energy required to remove an electron from an atom in its ground state. Elements with low ionization energy can easily lose an electron to form cations as the energy required to remove the electron is not high.
For example, elements in the first group of the periodic table, such as Lithium (Li), Sodium (Na), and Potassium (K), have relatively low ionization energies and thus, easily lose their one valence electron to form cations. On the contrary, elements with high ionization energies have a stronger hold on their electrons and are thus less likely to lose an electron and form a positive ion.
Furthermore, the successive ionization energies for a single element always increase. This is because removing an electron from an already positively charged ion or cation requires more energy due to the stronger electrostatic attraction that the ion has for its electrons. This makes it progressively harder to remove additional electrons, and create ions with higher positive charges.
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