Negligible volume of gas molecules and are not attracted to other gas particles.
1) Left up: a chemical change. We can see new substance (red-blue) is formed from one blue and one red atom.
In chemical change new substances are formed, the atoms are rearranged and the reaction is followed by an energy change.
2) Left down: a chemical change. We can see new substance (red-blue) is formed from two blue and one red atoms.
3) MIddle: a physical change. There is no new substance. Bonds are not broken.
4) Right up: a chemical change. Bonds are broken.
5) Right down: a physical change. Change of state of matter.
Answer:
Two Sections that contain nitrogen of a nucleotide that bond together to connect strands of DNA or RNA.
Explanation:
Answer:
CH₄ + 2O₂ → 2H₂O + CO₂
Explanation:
Chemical equation:
CH₄ + O₂ → H₂O + CO₂
Balanced chemical equation:
CH₄ + 2O₂ → 2H₂O + CO₂
Option d is correct option.
1st step:
CH₄ + O₂ → H₂O + CO₂
Left hand side Right hand side
C = 1 C = 1
H = 4 H = 2
O = 2 O = 3
Step 2:
CH₄ + O₂ → 2H₂O + CO₂
Left hand side Right hand side
C = 1 C = 1
H = 4 H = 4
O = 2 O = 4
Step 3:
CH₄ + 2O₂ → 2H₂O + CO₂
Left hand side Right hand side
C = 1 C = 1
H = 4 H = 4
O = 4 O = 4
Calculate the heat gained by the water first.
q = mCpΔT
m = 20.0 g
Cp = 4.186 J/g°C
ΔT = T(final) - T(initial) = 15.0°C - 10.0°C = 5.0°C
q = (20.0)(4.186)(5.0) = 419 J
This is equal to the heat lost by the metal, so calculate Cp for the metal, given:
q = -419 J (negative because heat was lost)
m = 5.00 g
ΔT = 15.0°C - 100.0°C = -85.0°C (negative because the temperature decreased)
q = mCpΔT —> Solve for Cp —> Cp = q/mΔT
Cp = -419 / (5.00 • -85.0) = 0.986 J/g°C