<u>Step 1- Find each element's molar mass:</u>
K=39.1, Cr=52, O=16
<span><u>Step 2-Multiply by their subscripts:</u>
</span> K=39.1*2=78.2
Cr=52*1=52
O=16*4=64
<span><u>Step 3-Find the molecule's molar mass:</u>
</span> 78.2+52+64= 194.2
<u>Step 4- Divide each element's mass by the </u><span><span><u>molecule's:</u>
</span> K: </span>78.2/194.2= 40.3%
Cr: 52/194.2=26.8%
O: 64/194.2=32.9%
<em>(if this helped, can I get Brainliest? Competing against a friend. Thanks!)</em>
Answer:
testosterone is released from their testes!
Answer:
6.022x10^23 molecules
Explanation:
Since it's one mole of CaCO3, multiply by Avogadro's number to get molecules
Answer:
Explanation:
a )
CH₃CH₂CH₂CH₂CH₂Br + KOH ⇒ CH₃CH₂CH₂CH₂CH₂OH
CH₃CH₂CH₂CH₂CH₂OH + acidic potassium dichromate ⇒ CH₃CH₂CH₂CH₂COOH
b )
CH₃CH₂CH₂CH₂CH₂Br + KCN ⇒ CH₃CH₂CH₂CH₂CH₂CN Hydrolysis ⇒ CH₃CH₂CH₂CH₂CH₂COOH .
c )
CH₃CH₂CH₂CH₂CH₂Br + KOH ⇒ CH₃CH₂CH₂CH₂CH₂OH
CH₃CH₂CH₂CH₂CH₂OH + acidic potassium dichromate ⇒ CH₃CH₂CH₂CH₂COOH + SOCl₂ ( thionyl chloride ) ⇒ CH₃CH₂CH₂CH₂COCl
d )
CH₃CH₂CH₂CH₂CH₂Br + KCN ⇒ CH₃CH₂CH₂CH₂CH₂CN Hydrolysis ⇒ CH₃CH₂CH₂CH₂CH₂COOH + PCC ( NH₃ ) ⇒ CH₃CH₂CH₂CH₂CH₂CONH₂
e )
CH₃CH₂CH₂CH₂CH₂Br + KCN ⇒ CH₃CH₂CH₂CH₂CH₂CN Hydrolysis ⇒ CH₃CH₂CH₂CH₂CH₂COOH + C₂H₅OH ( Ethyl alcohol + H⁺ )⇒
CH₃CH₂CH₂CH₂CH₂COOC₂H₅ ( ethyl hexanoate )
Answer: -1,030 kJ
Explanation:
To calculate the number of moles we use the equation:
.....(1)
Putting values in equation 1, we get:
The balanced chemical reaction is:
Given :
Energy released when 1 mole of combusts = 726k J
Thus Energy released when 1.42 moles of combusts =
Thus 1030 kJ of heat is released and as is negative for exothermic reaction,