Answer:
Matter is made of small particles of atoms or molecules. ... The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.
The volume of NO₂=6.25 L
<h3>Further explanation</h3>
Avogadro's stated :
<em>In the same T,P and V, the gas contains the same number of molecules </em>
So the ratio of gas volume = the ratio of gas moles

the volume of each gas (in a container of volume 10L) :
Total mol=10+10+20=40 mol



NO₂ (has increased by 25%) :



The main paragraph says everything and then you predict what’s going to happen
<h2> The amount of Hcn formed in grams is = 0.06223 grams</h2><h3> calculation</h3>
write the equation for reaction
that is; KCn + HCl → KCl + HCn
step 1:find the moles of KCn reacted
moles of KCn = mass of KCn/molar mass of KCn( 65.12 g/mol)
= 0.150 g/ 65.12 g/mol =2.303 x10^-3 moles
step 2: use the mole ratio between KCn :HCn which is 1:1 to determine the moles of HCn which is also 2.303 x 10^-3 moles
step 3: find the mass of HCn =moles of HCn x molar mass of HCn
= 2.303 x10^-3 x 27. 02 =0.06223 grams
Answer:
Energy is never lost, it just changes from one form to another