Answer:
Rn-224 --> Fr-224 + beta
Explanation:
Hi
When an isotope of radon 224 undergoes a radioactive decay by emitting a beta particle, an isotope of francium 224 is obtained.
Remember that the first letter of a chemical symbol is written with a capital letter
.
Radon: Rn
Francium: Fr
success with your homework
If the enthalpy change is negative, then the reaction is exothermic because heat energy was lost to the surroundings.
If the enthalpy change was positive, then the reaction was endothermic because heat energy was gained from the surroundings!
Hope this helps!! x
Answer:
0.75moles of H₄SiO₄
Explanation:
Given parameters:
Number of moles of H₂O = 1.5moles
Unknown:
Number of moles of H₄SiO₄ = ?
Solution:
To solve this problem, we need to write the reaction equation first;
SiO₂ + 2H₂O → H₄SiO₄
From the balanced reaction equation:
2 moles of water will produce 1 mole of H₄SiO₄
So 1.5 moles of water will produce 
= 0.75moles of H₄SiO₄
Answer:
B
Explanation:
I'm not 100% sure, but B seems like the most likely answer because the shape of a molecule usually is a major factor in how molecules interact with each other.
I hope that helps.
