➷ Fluorine. Carbon needs to gain 4 electrons to get a full outer shell whereas fluorine only needs to gain 1, making it much more reactive.
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To successfully live in a tide pool, organisms must have adaptations that allow it to:
What is the definition of economic value
Economic value can be described as a measure of the benefit from a good or service to an economic agent. It is typically measured in units of currency. Another interpretation is that economic value represents the maximum amount of money an agent is willing and able to pay for a good or service.
Properties of charcoal
The age of fossils can sometimes be determined by radiometric dating, which is based on the constant rate of decay of radioactive isotopes. the time required for half of a radioactive isotope to decay is called the half-life of that isotope. for example, the isotope carbon-14 has a half-life of 5,730 years. suppose it is determined that a fossilized leaf contains 12.5% of the carbon-14 that was present when the fossil formed. how old is the fossil? express your answer numerically.
An isotope of cesium has 55 protons and 78 neutrons. What is the mass number of this isotope?
The only stable caesium isotope is 133Cs, with 78 neutrons.
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The following question appears on a quiz: ""You fill a tank with gas at 60Â°C to 100 kPa and seal it. You decrease the temperature to 10Â°C but keep the volume constant. What happens to the pressure?
Answer: The final pressure will decrease ad the value is 85 kPa
To calculate the final pressure of the system, we use the equation given by Gay-Lussac Law. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant pressure.
are the initial pressure and temperature of the gas.
are the final pressure and temperature of the gas.
We are given:
Putting values in above equation, we get:
Hence, the final pressure will decrease ad the value is 85 kPa
`Silver salts have antimicrobial properties--they can kill bacteria by interfering with certain proteins. Silver nitrate used to be given in drop form to newborns to prevent them from contracting gonorrhea from infected mothers. How many oxygen atoms would be in 2.0 moles of silver nitrate?
3.6 × 10²⁴ atoms of O
Let's consider the molecular formula of silver nitrate: AgNO₃.
We can establish the following relations:
The atoms of oxygen in 2.0 moles of silver nitrate are:
Sublimation can occur because solids and liquids have what in common?
What is the difference between mitosis and meiosis