A space probe is an unpiloted, unmanned device sent to explore space and gather scientific information. A space probe is launched from Earth with a set of scientific instruments and tools used to study the atmosphere and composition of space and other planets, moons, or celestial bodies. A probe may operate far out in space, or it may orbit or land on a planet or a moon. It may make a one-way journey, or it may bring samples and data back to Earth. Most probes transmit data from space by radio. There are different types of space probes because they collect different science information about very different environments. The probes must be able to withstand the various extreme environments to collect data. Humans have been sending space probes into space since the 1950s. The next generation of probes will study samples taken from comets, asteroids, and eventually Mars.
Answer:
Option A. This step is to remove water from the ether layer.
Explanation:
When the goal of an experiment is to conduct a reaction and isolate the product, it is referred to as work-up. The work-up refers to method aimed at purifying the material and most commonly occur in a separatory funnel. Solutions are added to the funnel to either extract or wash the mixture with the goal of isolating the product from excess reagents, catalysts, solvent, side product that may arise from side reactions.
Common washes include: Water, Sodium Bicarbonate, Sodium Carbonate, saturated sodium chloride (brine).
When an organic layer ( e.g. diethyl ether, ethyl acetate) is washed with brine, the purpose of the wash is to REMOVE LARGE AMOUNT OF WATER that may be dissolved in the organic layer.
Brine works to remove water from an organic layer because it is highly concentrated (since Sodium Chloride is highly water soluble. Therefore, the most likely reason for washing a reaction product mixture containing hydrocarbons in diethyl ether with with brine solution in a separatory funnel is to remove the water from the ether layer.
A neutron has a mass of about 1 atomic unit / number.
Answer:
physical change.
Explanation:
because it changes its physical attributes
