Answer:
4.87 g
Explanation:
The formula between the number of moles, mass and Mr can be used to find the mass of barium.
<em>Number of moles = mass ÷ Mr</em>
So, mass = number of moles × Mr
Mr of Ba = 137.3
∴ Mass = (3.55 × 10⁻²) × 137.3 = 4.87 g
Answer:
na+then mg2+ then al3+
Explanation:
this is due to the distance between their nucleus and valence electron
Answer:
The empirical formula is C₂H₃
Explanation:
The empirical formula of a chemical compound is defined as the simplest positive integer ratio of atoms present in a compound.
The reaction of combustion for a CₐHₓ is:
CₐHₓ + (a+x/4) O₂ → a CO₂ + ˣ/₂ H₂O
The moles obtained are
15,3 g of CO₂ × 
= 0,3476 moles of CO₂≡moles of C
4,70 g of H₂O × 
= 0,2608 moles of H₂O × 2 = 0,5216 moles of H.
The ratio H:C is 0,5216/0,3476= 1,5. That means you have 1,5 H per 1C, that is the same than 3H per 2C. Thus, empirical formula is:
C₂H₃
I hope it helps!
Answer:
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Explanation:
The type of relationship exists between reactant concentration and reaction rate is direct relationship. The type of relationship exists between reaction temperature and reaction time is inverse relationship.
According to the collision theory, the more particles colliding, having the activation energy, the higher the rate of reaction. This implies that if we increase the concentration of colliding particles, the rate of reaction increases accordingly. This is a direct relationship.
We know that for every 10°C rise in temperature, the rate of reaction doubles. This means that there is an inverse relationship exists between temperature and reaction time because higher temperature means shorter reaction time and vice versa.
The more the kinetic energy of the reaction the higher the reaction rate because the particles collide more frequently. This is a direct relationship.
Learn more: brainly.com/question/4147411
