I'm pretty sure it's A because its just sand and everything else is mixed with something Hope that helped Have a good day! :-)
Answer:
4 C2H5 + 13 O2 -> 8 CO2 + 10 H2O
Explanation:
What I do is I make a chart of how many elements the product side and reactant sides have:
Reactants-
2 C
5 H
2 O
Products-
1 C
3 O
2 H
It's easier to see how many coefficients are needed for the reaction to be balanced then. Hope this helped.
Answer:
all atoms of a given element have the same number of protons but may have different masses
Explanation:
After the discovery of isotopes, scientists were able to conclude that all atoms of a given element have the same number of protons but may have different masses.
Isotopes are atoms of an element that have the same atomic number but different mass number.
The atomic number is the number of protons within an atom.
Mass number is the number of protons and number of neutrons.
Therefore, all atoms of a given element have the same number of protons but different mass.
Answer:
1450 k
Explanation:
We are given:
V1 = 250 mL V2 = 500 mL
T1 = 725k T2 = T
V1 / T1 = V2 / T2
Now, replacing the values:
250 / 725 = 500 / T
T = 500 * 725 / 250
T = 2 * 725
T = 1450 k