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dolphi86 [110]
3 years ago
11

A _____ is a place where magma reaches Earth's surface to become lava, which can come out of an opening called a _____. A. crate

r; fissure B. fissure; crater C. volcano; crater D. volcano; fissure
Chemistry
2 answers:
IRINA_888 [86]3 years ago
4 0
The answer is:
D. volcano, fissure :)
Temka [501]3 years ago
4 0
C. Volcano;Crater


This is because magma usually comes out of a volcano and the opening is called crater and not fissure as the other person said.
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An atom of fluorine has an atomic mass of 19 u. Keeping in mind that its atomic number is 9, what can you infer about this atom?
Oliga [24]
The fluorine atom has a neutron number of 10 it also have 10 valence electrons
8 0
3 years ago
Problem 12.002 the molar analysis of a gas mixture at 30°c, 2 bar is 40% n2, 50% co2, 10% ch4. determine
andreev551 [17]
The problem is incomplete. However, there can only be two probable questions for this problem. First, you can be asked the individual partial pressures of each gas. Second, you can be asked the volume occupied by each gas. I can answer both cases for you.

1.

Let's assume ideal gas.
Pressure for N₂: 2 bar*0.4 = 0.8 bar
Pressure for CO₂: 2 bar*0.5 = 1 bar
Pressure for CH₄: 2 bar*0.1 = 0.2 bar

2. For the volume, let's find the total volume first.

V = nRT/P = (1 mol)(8.314 J/mol-K)(30 +273 K)/(2 bar*10⁵ Pa/1 bar)
V = 0.0126 m³
Hence,
Volume for N₂: 0.0126 bar*0.4 = 0.00504 m³
Volume for CO₂: 0.0126*0.5 = 0.0063 m³
Volume for CH₄: 0.0126*0.1 = 0.00126 m³
3 0
3 years ago
What is the molarity of a solution with 130g of CoCl2 in 1/2 liter? (can you show the steps please)
Elden [556K]

Answer:

2M

Explanation:

M=mol/L

1. Find moles of CoCl2

mass of substance/molar mass = 130/129.833 = 1.001 mol

3. Substitute in molarity equation

M=(1.001/0.5)

M= around 2M

7 0
2 years ago
Element whose atoms have completed their outer energy level are the ____​
umka21 [38]

Answer:

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Explanation:

nobles gases have their outer energy level complete

5 0
2 years ago
Which of the following is a true statement?
maria [59]

Answer:

the second one seems right :)

Explanation:

3 0
3 years ago
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