The Answer is "None of the Above"
Climate can determine a lot of things, but it especially determines what kind of plants and animals can live in an area. For example, polar bears need a cold climate. They would be terribly hot and would die quickly in the desert. When climates start to change, animals and plants become endangered.
Winds are generally in the same direction in certain places over the oceans. They have names like the North East Trade winds and Westerlies. These winds are important in climates and were also important to ancient sailing ships which needed the power of the wind to travel.
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Answer:
2.34 mins
Explanation:
The regression equation in mathematical terms, shows the relationships between a dependent variable (reaction time) and one or more independent variables (exposure to a chemical level).
It also shows the effect of exposure to chemical on the reaction time.
The linear regression equation Y=2.3X-1.8 can be used to make predictions about about Y which is the reaction time for a given value of X which is the level of exposure to chemical.
From the question, X (level of exposure to chemical) is 1.8
The regression equation becomes
Y=2.3(1.8) - 1.8
Y= 4.4 - 1.8
Y= 2.34
There fore, the reaction time is 2.34 mins
Answer:
1.68 × 10²³ Molecules
Explanation:
As we know that 1 mole of any substance contains exactly 6.022 × 10²³ particles which is also called as Avogadro's Number. So in order to calculate the number of particles (molecules) contained by 0.280 moles of Br₂, we will use following relation,
Moles = Number of Molecules ÷ 6.022 × 10²³ Molecules.mol⁻¹
Solving for Number of Molecules,
Number of Molecules = Moles × 6.022 × 10²³ Molecules.mol⁻¹
Putting values,
Number of Molecules = 0.280 mol × 6.022 × 10²³ Molecules.mol⁻¹
Number of Molecules = 1.68 × 10²³ Molecules
Hence,
There are 1.68 × 10²³ Molecules present in 0.280 moles of Br₂.
Dear friend,
Because the water remains water throughout this process, it is not undergoing any chemical change. There is no new substance or element added but only a change of form.