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Aleonysh [2.5K]
2 years ago
14

Which of the following is the poorest conductor electricity

Chemistry
1 answer:
mojhsa [17]2 years ago
5 0

Answer:

Fluorine

Explanation:

It is a non-metal does not conduct electricity

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Earth has a magnetic force that is strongest at its core.

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Plants that have nigrogen fixing bacteria in their roots are called​

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Which statement best describes one way that plate tectonics causes change
Romashka-Z-Leto [24]

Answer: Plate tectonics was Wegener's theory that Earth's continents rest on sections of Earth's crust that drift together and apart over time; continental drift is a hypothesis describing how plate tectonics might happen.

 

Explanation: Tectonic plate movement is a long-term environmental change.

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Which source would be the most reliable to validate a claim?
Mekhanik [1.2K]

Answer:

In general, print publications with authors and listed sources tend to be reliable because they provide sources which readers can verify. Likewise, Web postings with a .gov (posted by the United States government) are both current and reliable.

Explanation:

4 0
3 years ago
How many molecules of CF₂Cl₂ are in 45.7 grams of CF₂Cl₂? (Show work)
posledela

Answer:

The answer to your question is: 2.20 x 10 ²³ molecules

Explanation:

Data

mass = 45.7 g

molecules of CF₂Cl₂ = ?

Process

1.- Calculate the mass number of CF₂Cl₂

   C = 12    F =2 x 19    Cl = 2 x 35.5

   total = 12 + 38 + 71

   total = 121 g

2.- Use the Avogradro's number to solve the problem

                       121 g -------------------  6.023 x 10²³ molecules of CF₂Cl₂

                        45.7 g ---------------     x

                        x = (45.7 x 6.023 x 10²³) / 121

                        x = 2.75 x 10²⁵ / 121

                        x = 2.20 x 10 ²³ molecules

4 0
3 years ago
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