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r-ruslan [8.4K]
4 years ago
13

Which group was fighting communists in Nicaragua in the 1980s?

Chemistry
1 answer:
stira [4]4 years ago
7 0
The answer is A, the contras  x Good luck!! :)

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At a transform fault boundary
tiny-mole [99]

Answer:

Most of these faults are hidden in the deep ocean, where they offset divergent boundaries in short zigzags resulting from seafloor spreading, the best-known (and most destructive) being those on land at the margins of continental tectonic plates. A transform fault is the only type of strike-slip fault that is classified as a plate boundary.

Explanation:

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What is science? (1 point) Experimentation that discovers laws about the world around you. A body of knowledge and a process of
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What is the oxidation number of manganese (Mn) in potassium permanganate (KMnO4)?
andrezito [222]

What is the oxidation number of manganese (Mn) in potassium permanganate (KMnO4)?

+3
+5
+6
+7

The oxidation number of manganese (Mn) in potassium permanganate (KMnO4) is +5. 

7 0
3 years ago
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What volume of 0.10 M NaOH is required to neutralize 30 mL of 0.10 M HCl?
coldgirl [10]
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5 0
3 years ago
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A chef plans to mix 100% vinegar with italian dressing. the italian dressing contains 13% vinegar. the chef wants to make 150 mi
charle [14.2K]
To determine the volume of both concentration of vinegar, we need to set up two equations since we have two unknowns. 

For the first equation, we do a mass balance:

mass of 100% vinegar + mass of 13% vinegar = mass of 42% vinegar

Assuming they have the same densities, then we can write this equation in terms of volume.

V(100%) + V(13%) = V(42%)
   we let x = V(100%)
             y = V(13%)

x + y = 150

For the second equation, we do a component balance:

1.00x + .13y = 150(.42)
x + .13y = 63

The two equations are
x + y = 150
x + .13y = 63

Solving for x and y,
x = 50
y = 100

Therefore, you need to mix 50 mL of the 100% vinegar and 100 mL of the 13% vinegar.

6 0
3 years ago
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