During which month do the suns ray strike the northern part of the world least directly
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Related Questions
Why do you think the location surrounding the pacific ocean is known as the ring of fire
What information could you use to determine the atomic number of an unknown elementthat has a mass number of 22?OA. number of ionsB. number of isotopesC. number of neutronsOD. number of electrons
Why would a large iceberg have more thermal energy than a cup of boiling water?
On the periodic table how many periods are there and how many columns are there
B-Many earthquakes are concentrated in narrow zones at the centers of plates.
C-Many earthquakes are concentrated in narrow zones along plate boundaries.
D-Most earthquakes occur deep under the ocean.
(I was thinking C but i'm not sure...)
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The answer is C-Many earthquakes are concentrated in narrow zones along plate boundaries.
C
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Answer:
mass Mg = 1.937 Kg
Explanation:
from periodic table for Mg:
⇒ molecular mass Mg = 24.305 g/mol
∴ mol ≡ 6.022 E23 atoms
⇒ mol Mg = (4.80 E25 atoms)×(mol/6.022 E23 atoms)
⇒ mol Mg = 79.708 mol
⇒ mass Mg = (79.708 mol)×(24.305 g/mol)
⇒ mass Mg = 1937.3 g
⇒ mass Mg = 1.937 Kg
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Final answer:
If an average cell phone is dropped from a typical cruising altitude of an airplane, neglecting air resistance, it would take about 107 seconds to reach the ground.
Explanation:
The subject this question falls under is physics because it involves the physical principles of gravity and free fall. If we ignore air resistance (a common simplification in basic physics problems), we can solve this problem by employing the equation for the time (t) of a free-falling object:
t = √(2h/g),
where h is the height the object falls from and g is acceleration due to gravity (about 9.8 m/).
Notice that we would need to first convert 37,000 feet to meters (about 11,277.6).
By substituting these values into our formula, we get a value that indicates that a phone falling from the typical cruising altitude of an airplane would take about 107 seconds to hit the ground.
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(2) 194 g/mol (4) 242 g/mol
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The gram-formula mass of Fe(NO₃)₃ is 242 g/mol. Therefore, option D is correct.
Gram-formula mass is also known as the molar mass. It refers to the mass of one mole of a substance. It is expressed in units of grams per mole (g/mol) and is commonly used in chemistry to relate the amount of a substance to its mass.
The atomic mass of Iron= 56 amu.
The atomic mass of Nitrogen = 14 amu.
The atomic mass of Oxygen = 16 amu.
Gram-formula mass of Fe(NO₃)₃ = (Atomic mass of Fe) + 3 × {(Atomic mass of N × 1) + (Atomic mass of O × 3)}
= 56 + 3 × (14 × 1 + 16 ×3)
= 56 + 3 × (14 + 48)
= 56 + 3 × 62
= 56 + 186
= 242 g/mol
Therefore, the gram-formula mass of Fe(NO₃)₃ is 242 g/mol.
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Gram formula mass is the mass of 1 mol of substance.
the given compound is Fe(NO₃)₃
the molar mass of Fe(NO₃)₃ can be calculated taking the sum of the products of the individual elements by the number of atoms of the element making up the compound.
molar mass of Fe(NO₃)₃ = molar mass of Fe + 3 (molar mass of N + (3 x molar mass of O))
molar mass of Fe - 56, N - 14 and O - 16 g/mol
substituting the values in the above formula
molar mass of Fe(NO₃)₃ = 56 + 3 (14 + (3 x 16) )
molar mass of Fe(NO₃)₃ = 56 + 3 (14 + 48) = 56 + 3(62) = 56 + 186 = 242
therefore molar mass of Fe(NO₃)₃ is 4)242 g/mol
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compound !!
B.) property
C.) protein
D.) raw material
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Answer:
particle
Explanation:
if there were more than one kind of particle, it would be a compound.