nitrogen-15
B.
nitrogen-8
C.
nitrogen-7
D.
nitrogen-1
D nitrogen-1 because you divide the two numbers to get what left of the nitrogen
B.two gases
C.a solid and a liquid
D.a liquid and a gas
The correct answer is b. two gases
The explanation:
-Mixtures can be either homogeneous or heterogeneous. A homogeneous mixture is a type of mixture in which the composition is uniform and every part of the solution has the same properties.\
- Examples of homogeneous mixtures include alloys and alcohol in water. A heterogeneous mixture is a type of mixture in which the components can be seen.
-One example of a mixture is air. Air is a homogeneous mixture of the gaseous substances nitrogen, oxygen, and smaller amounts of other substances.
Answer: B.two gases
Explanation: Homogeneous mixtures are mixtures in which dispersed phase is uniformly distributed throughout the dispersion medium and there is no physical boundary between the dispersed phase and dispersion medium.
Heterogeneous mixtures are mixtures in which dispersed phase is not uniformly distributed throughout the dispersion medium and there is a distinct physical boundary between the dispersed phase and dispersion medium.
a) Two liquids may or may not be completely miscible thus may form a homogeneous (milk and water) or a heterogeneous mixture (oil and water).
b) Two gases always form a homogeneous mixture as there is large vacant spaces present between the molecules.
c) A solid and a liquid may or may not be completely miscible thus may form a homogeneous (salt and water) or a heterogeneous mixture ( sand and water).
d) A liquid and a gas may or may not be completely miscible thus may form a homogeneous (river water) or a heterogeneous mixture (perfume spray).
B) Phil and Bart race down the street to determine who is the fastest.
Eliminate
C) A car company pays participants to test drive and evaluate their new auto.
D) A private company uses a random taste test of three different, unidentified soft drinks.
Answer:
In a community near where we live is such as pond, forest, backyard. There are many types of interaction seen in the backyard.
A lion was running after a deer. This is a type of predation relationship in which the predator is running after prey in order to eat it.
This is because the, the he lion is a predator that will feed on the prey to them.
This interaction can be seen in the forest.
B)Each Oxygen shares 2 electrons with the other
C)Each Oxygen shares 8 electrons with the other
D)Each Oxygen shares 1 electrons with the other
Answer:
The middle, or the transitional metals
Explanation:
When naming elements, we use roman numerals to indicate what their charge is. The charge of an element is affected by their number of valence electrons (outermost electrons).
Transitional metals are generally multivalent, meaning that element has more than one possible number of valence electrons. This makes them have more than one possible charge. Roman numerals indicate which charge of that element is used/discussed.