Is there a graph presented?
I need to see it in order to answer.
Answer:
4.87×10²⁴ molecules
Explanation:
Given data:
Mass of glucose = 1456 g
Number of molecules = ?
Solution:
Number of moles of glucose:
Number of moles = mass/molar mass
Number of moles = 1456 g/ 180.156 g/mol
Number of moles = 8.1 mol
1 mole of glucose contain 6.022×10²³ molecules
8.1 mol × 6.022×10²³ molecules / 1 mol
48.7×10²³ molecules
4.87×10²⁴ molecules
True.
Polyhedrons are closed figures which are bounded by polygons such as cube, prism, pyramids.
Non-polyhedrons are solid figure which have sides but are not polygons such as sphere, cone and cylinder.
Please see the attached figure for polyhedron:
Hence, the given statement is true i.e. other polyhedrons are present other than prisms and pyramids.
I think that, considering that a mole contains an Avogadro's number of elements, there should be 6.2× an Avogadro's Number of atoms of Al. 6.2×6.022×1023=3.733×10<span>24 atoms</span>
Answer:
The temperature will decrease to 50 K
Explanation:
Step 1: Data given
Temperature = 127 °C = 400 K
Pressure = 2.00 atm
The pressure decreases to 0.25 atm
Volume and number of moles do not change
Step 2: Calculate the new pressure
p1/T1=p2/T2
⇒with p1 = The initial pressure = 2.00 atm
⇒with T1 = The initial temperature = 127 °C = 400 K
⇒with p2 = the new pressure = 0.25 atm
⇒with T2 = the new temperature = TO BE DETERMINED
2.00 atm / 400 K = 0.25 atm / T2
0.005 = 0.25 / T2
T2 = 0.25/0.005
T2 = 50 K
The temperature will decrease to 50 K