Answer:
29.85°C
Explanation:
0°K is absolute zero. That is is same as -273.15°C.
To find C, subtract 273.15 from the temperature in °K.
303K - 273.15°C = <em><u>29.85°C</u></em>
The mass of Au is 19.7 g
The chemical reaction may be
Au₂S₃ + 3H₂ → 2Au + 3H₂S
1 mole of Au₂S₃ gives 2 mole of Au
Then 0.0500 mol of Au₂S₃ gives
0.0500 × 2 / 1
= 0.10 moles.
To find mass
Mass = moles × molar mass
Moles = 0.10.
Molar mass = 197 g
Mass = 0.10 × 197
= 19.7 g
Hence the mass of Au produces is 19.7 g
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It is C. An increase of temperature results in an increase in kinetic energy of the molecules of the substance. For example, in a gas the molecules will move about faster.
Answer:a successful classification or division implies the presence of the object own of each science and its relations with other related areas, the method or requirement of each science to face its object, and also its purpose for which poduce the fact of investigation.
Explanation:
Science is divided into numerous areas, each of which has as its object only a part of all the knowledge acquired, through experience and research.
The primary objective of science, is to improve the quality of life of humans, also helps solve everyday questions.
Science can be subdivided according to its object, its method, others by its affinity, complexity and dependence, however all classification tends to seek the links or relationships between the different disciplines or forms of knowledge, thus a successful classification or division implies the presence of the object own of each science and its relations with other related areas, the method or requirement of each science to face its object, and also its purpose for which poduce the fact of investigation.
When the balanced reaction equation is:
P4O10 + 6H2O→ 4 H3PO4
when we have the mass of P4O10 = 10 g and the molar mass of P4O10=284 g/mol & we have the molar mass of H3PO4 =98 g/mol so we can get the mass of H3PO4 by substitution by:
mass of H3PO4 = (mass of P4O10)/(molar mass of P4O10) * 4(mol of H3PO4)*molar mass of H3PO4
∴mass of H3PO4 = (10 / 284) * 4 * 98 = 13.8 g
