Answer: Chris is right because some of the mass of the reactants escaped as gas.
Explanation:
The law of conservation of mass is a universal law: it is obeyed always.
Since when the two substances were combined they reacted with lots of fizzing and bubbling, it is clear that some gas was formed. This is, one or more products were in the form of gas.
In this case, the law of conservation of mass leads to the conclusion that part of the original mass contained in the reactant substances ended in the products that escaped as gas.
In fact, if all the measurements were made carefully, the difference of the masses before and after the reaction corresponds exactly to the mass of the products that evolved as gas and were not collected. This is, the law of conservation of mass permits to calculate the mass of the gaseous products that couldn't be directed determined because the gases were not confined inside the walls of a vessel.
The people cut down the trees
The equation looks like this:
KBr + AgNO3 —-> KNO3 + AgBr
The products are potassium nitrate and silver bromide
A-14
Explanation:
Mass number (MN) = Proton number + Neutron number
MN=7+7
MN=14
Answer:
1837.89 Lt
Explanation:
The chemical reaction for this situation is:
NaHCO₃ + HCl → NaCL + H₂O + CO₂ ₍g₎
Where the mola mass we need are:
M NaHCO₃ = 84 g/mol
M CO₂ = 44 g/mol
As we have 6.00 Kg of sodium bicarbonate, then:
6 Kg NaHCO₃ = 71.43 moles of NaHCO₃
Due the stoichiometry of this chemaicl reaction:
1 mol NaHCO₃ = 1 mol CO₂
71.43 moles NaHCO₃ = 71.43 moles CO₂
And considering that CO₂ is an ideal gas, we can use the following formula:
PV=nRT
V = (nRT)/P
n = 71.43 mol
R = 0.083 Ltxatm(molxK)
T = 37°C = 310 K
P = 1 atm
So: V = (71.43x0.083x310)/1
V CO₂ = 1837.89 Lt