b. green
water solutions have neutral pH ( ~7) so the indicator will turn green
Bromothymol blue would become green when added to water, due to water's neutral pH of around 7. This response uses pH levels and the color changes of bromothymol blue as indicators of acidity or basicity.
The color of bromothymol blue in water would be green. That's because the pH level of pure water is around 7, which falls within the range of 6 to 8 where bromothymol blue would turn green. Bromothymol blue is an indicator used in chemistry to identify pH levels by presenting different colors in solutions of different pHs: it turns yellow in solutions under pH 6, green between pH 6 to 8, and blue when the pH is above 8.
#SPJ11
(2) 2-chloropropane (4) 2-pentene
b. The mass of the Carbon-14 sample is greater than the Carbon-12 sample, but the reactivity of both samples was the same .
c. The reactivity of the Carbon-14 sample is less than the Carbon-12 sample, but the mass of both samples was the same.
d. The reactivity of the Carbon-14 sample is greater than the Carbon-12 sample, but the mass of both samples was the same.
Answer:
B.
Explanation:
Correct: b. The mass of the Carbon-14 sample is greater than the Carbon-12 sample, but the reactivity of both samples was the same .
- C-14 has two additional neutrons, so is heavier than C-12. The chemical properties will be the same, however.
Natural systems like water in a pond rarely reach thermal equilibrium due to temperature differences and energy transfer limitations.
Natural systems like the water in a pond rarely reach thermal equilibrium due to various factors.
These factors prevent the pond from reaching thermal equilibrium.
#SPJ1
Answer: The correct answer is neutrons.
Explanation:
There are 3 subatomic particles that are present in an atom. They are: protons, electrons and neutrons.
Protons carry positive charge and are found inside the nucleus of an atom.
Electrons carry negative charge and are found around the nucleus in the orbits.
Neutrons does not carry any charge and are found inside the nucleus of an atom.
Hence, the correct answer is neutrons.
Using Reference Table H, the vapor pressure of propanone at 45°C is 33 kPa.
The vapor pressure of a substance changes with temperature and can be accurately determined using a Reference Table H in Chemistry. From the table, we see that the vapor pressure of propanone at 45°C is 33 kPa, which corresponds to option (2). This value shows that the vapor pressure of propanone increases as the temperature rises, which is a characteristic feature of volatile substances like propanone.
#SPJ11
b) the metals strips
c) amount of rust
d) hydrochloric acid
Answer:
b) the metals strips
Explanation:
In an experimental design, an independent variable is a variable that is changed or manipulated in a series of experiments. An independent variable is not dependent on any other variable in the experiment. The hypothesis for this experiment is stated to be: "If the chemical activity of the metallic wrapper is increased, then less rusting of iron will occur. The independent variable relates to the type of metal wrapping strip, and the dependent variables are the amount of rusting and color of the water.