Answer: .3 or 3/10
Explanation: The probability that her first answer is correct is 2/5. Since she got the first guess correct, now there is only 1 correct answer out of 4. There is a 3/4 chance she will get the next problem wrong
So: 2/5 x 3/4 = .3
Answer:
Taking into account the definition of avogadro's number, 1.8×10²⁰ atoms of silver are in 2.98×10⁻⁴ moles of silver.
First, you have to know that it is called Avogadro's Number or Avogadro's Constant. By Avogadro's number it is understood the number of elementary entities (that is, of atoms, electrons, ions, molecules) that exist in a mole of any substance. Its value is 6.023×10²³ particles per mole.
Avogadro's number represents a quantity without an associated physical dimension, so it is considered a pure number that allows describing a physical characteristic without an explicit dimension or unit of expression.
Avogadro's number applies to any substance.
Then you can apply the following rule of three: if 6.023×10²³ atoms are contained in 1 mole of silver, then 1.8×10²⁰ atoms are contained in how many moles of silver?
amount of moles of silver= (1.8×10²⁰ atoms × 1 mole)÷ 6.023×10²³ atoms
amount of moles of silver= 2.98×10⁻⁴ moles
Finally, 1.8×10²⁰ atoms of silver are in 2.98×10⁻⁴ moles of silver.
The items that represent the perceived successes of the preparedness movement and those that represent the perceived failures are:
Successes
- It trained soldiers who became the main members of the officer corps.
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It trained people to be better members of the workforce.
- It forced improvements to the U.S military.
- It helped lead the U.S to join the war.
Failures
- It helped spark an arms race between major countries.
<h3>What is the Preparedness Movement?</h3>
The Preparedness movement was initiated by the former president, Theodore Roosevelt. His aim was to convince President Woodrow Wilson and the American citizenry of the need to prepare to join the first world war.
This movement helped to prepare the nation for the war.
Learn more about the Preparedness Movement here:
brainly.com/question/880696
1 disease outbreak would be the flu
