Answer:
No, the reaction was not carried out in a closed system
Explanation:
Recall that a closed system is one in which there is no exchange of materials nor energy. Hence there is no movement of matter in or out of the system. The total mass and energy present in the system is constant.
On the reactant side we have that the total mass of baking soda and vinegar is 47g + 13 g = 60g.
However on the product side, we have only a total of 56g which implies that a mass of 4g was lost in the reaction. This loss of mass can not happen in a closed system.
Hence the system is not a closed system because some mass was lost.
Answer: situation ubiquitous presence in our lives
Ubiquitous means found everywhere or ever-present. A high stress job, overcrowding and commuting are daily stress creating circumstances. In this lifestyle stress is nearly unavoidable because it is everywhere.
Answer:laboratory experimentation
Explanation:
The type of investigation that represent the descriptive method of scientific inquiry are; observation, case study and survey.
- Providing humanitarian aid, including clothing.
- Sending food and clean water.
- Providing medicine and immunizations
The correct answer is Risk group 2
Explanation: Risk Group is a population group exposed to a given “Factor” or identified with a particular “Risk Marker”.
