B.Several chemical changes occurred. I conclude that a chemical reaction took place
Explanation:
From the observation, Jason can conclude that several chemical changes occurred and a chemical reaction has taken place. In a chemical change, often times, new products are usually formed.
- A chemical change is one in which new kind of matter is formed.
- Chemical changes are products of chemical reactions.
- The rearrangement of atoms in reacting species and the formation of bonds leads to chemical reactions.
- Chemical changes are irreversible, no change in mass(mass is conserved) and they require considerable amount of energy.
Learn more:
chemical change brainly.com/question/9388643
#learnwithBrainly
Answer:
Molarity tell us about the concentration of moles of solute in a solution.
Explanation:
Chemical substances are measured in terms of mole. Mole is defined as the amount of substance which contains 6.022×10²³ particles, ions or atoms. In System of international, amount of substance is measured in moles. So molarity tells us more information about amount of solute in a solution as compared to percent solution.
Answer:
Sun's energy
Explanation:
because Without the energy produced by the fusion of hydrogen in the sun, the Earth would quickly change into a cold planet that could not support life as we know it.
Respuesta:
14,9 g
Explicación:
Paso 1: Calcular los moles de gas
Una garrafa contiene 9 L de gas a 18°C (291 K) y 780 Torr. Podemos encontrar los moles de gas (n) usando la ecuación del gas ideal.
P × V = n × R × T
n = P × V/R × T
n = 780 torr × 9 L/(62,4 Torr.L/mol.K)/ × 291 K = 0.387 mol
Paso 2: Calcular la masa molar del gas
El gas tiene una densidad (ρ) de 2 g/L a 80 °C (353 K) y 1,5 atm. Podemos calcular la masa molar (M) del gas usando la siguiente fórmula.
ρ = P × M / R × T
M = ρ × R × T / P
M = 2 g/L × (0.082 atm.L/mol.K) × 353 K / 1,5 atm = 38,59 g/mol
Paso 3: Calcular la masa del gas (m)
Usaremos la siguiente formula.
m = n × M = 0.387 mol × 38,59 g/mol = 14,9 g
