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Oxana [17]
3 years ago
12

Questions related to Metals​

Chemistry
1 answer:
valentina_108 [34]3 years ago
7 0

Answer:

what are metals and non metals ?

define sulphur ?

Explanation:

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Why do intermolecular forces exist between water molecules?
fenix001 [56]

Answer:

I dont really know but they  are really small

Explanation:

hope this helps

3 0
3 years ago
Read 2 more answers
When 40.0 mL of 0.200 M HCl at 21.5°C is added to 40.0 mL of 0.200 M NaOH also at 21.5°C in a coffee-cup calorimeter, the temper
MakcuM [25]

Answer:

The enthalpy change for the reaction is ΔH = - 54.3 kJ/mol

Explanation:

The reaction between HCl and NaOH is a neutralization reaction:

HCl + NaOH \rightarrow NaCl + H2O

Heat released during neutralization = Heat gained by water

i.e. \qrxn = -\q(solution)-----(1)

where:

\q(solution) = mc\Delta T-----(2)

m = total mass of solution

m = density*total\ volume = 1.00g/ml*(40.00+40.00)ml = 80.00\ g

ΔT = change in temperature = 22.8 - 21.5 = 1.3 C

c = specific heat = 4.18 J/g C

\q(solution) = 80.00g*4.18J/gC*1.3C = 434.7 J

As per equation (1): qrxn = -434.7 J

The reaction enthalpy ΔH is the heat released per mole of acid (or base)

Moles\ of\ HCl = V(HCl) * M(HCl) = 0.040 L*0.200moles/L = 0.008\ moles

\Delta Hrxn = \frac{q}{mole}=\frac{-434.7J}{0.008mole}=-54337 J/mol=-54.3 kJ/mol

7 0
3 years ago
Select the TRUE statements below regarding the coordination compound prepared in lab. Group of answer choices The coordination c
Vanyuwa [196]

Answer: Hello the compound is missing but I was able to get the Full question and missing compound . ( compound = copper sulfate )

<em>answer</em> : statement ; 2 , 3 and 5

Explanation:

The true statements regarding the coordination compound ( copper sulfate ) are :

  • The ligand must have at least one unshared pair of valence electrons in order to covalently bond with transition metal in the coordination compound ( statement 2 )
  • Ethanol was used during crystallization of the coordination compound because the compound is soluble in ethanol ( statement 3 )
  • The colors of many coordination compounds are the result of light absorption by the d electrons on the transition metal ( statement 5 )

During the coordination of compounds dative bonds exits between the transition metals and the Ligands molecules

7 0
4 years ago
Penny has a pencil that is 19 cm long. How long the pencil In inches
JulijaS [17]
You divide 19 centimeters by 2.54 making 19 centimeters equivalent to 7.48 inches
8 0
3 years ago
Read 2 more answers
True/False<br> 1. A compound makes up an atom<br> Explain
lana [24]

Answer: True

Explanation: The answer is true because A compound is a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds. … There are two main types of chemical bonds that hold atoms together: covalent and ionic/electrovalent bonds. Atoms that share electrons in a chemical bond have covalent bonds.

5 0
2 years ago
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