Answer:
add more types of plants
Explanation:are you kidding me i’m doing this stuff and i’m in 7th grade
Water has greatest boiling and melting points because strong hydrogen bonds between water molecules (intermolecular force). That is because oxygen has largest electronegativity and smallest atomic radius of all elements in group. Other elements in this group do not form hydrogen bonds and they are gasses in room temperature, water is liquid and their boiling and melting points are lower. Boiling and melting point of hydrides gradually increases from H₂S to H₂Te because of increase of the radius and molecular mass of atoms from sulfur to tellurium, that is why intermolecular force of attraction of molecules increases. <span>
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Answer:
V = 34.3 L
Explanation:
Given data:
Volume of hydrogen produced = ?
Mass of magnesium = 36.7 g
Temperature and pressure = standard
Solution:
Mg + 2HCl → MgCl₂ + H₂
Number of moles of magnesium:
Number of moles = mass/molar mass
Number of moles = 36.7 g/ 24 g/mol
Number of moles = 1.53 mol
Now we will compare the moles of magnesium with hydrogen.
Mg : H₂
1 : 1
1.53 : 1.53
Number of moles of hydrogen produced = 1.53 mol
Volume of hydrogen:
PV = nRT
V = nRT / P
V = 1.53 mol × 0.0821 atm.L/mol.K × 273 K/ 1 atm
V = 34.3 L
They'd observe any new substances or new color, and temp. that is irreversible.
If this helped and you have any other questions, feel free to comment on my wall. Hope this helped.
Answer: Charles's law, Avogadro's law and Boyle's law.
Explanation:
Boyle's law is: at constant temperature PV = constant
Charles law is: at constant pressure V/T = constant
Avogadro's law is: at constant pressure ant temperature, equal volume of gases contain equal number of moles: V/n = constant
Ideal gas law: PV/nT = constant => PV = nT*constant = PV = nTR