Answer:
5
Explanation:
The atomic number is the number of protons in an atom. Protons are the positively charged particles in the nucleus. The number of protons define the identity of an element. An element with 5 protons is Boron, no matter how many neutrons may be present.
Answer:
2
Explanation:
In the equation, Cl is chlorine and there is a number "2" so that the correct answer is 2.
Answer:
No
Explanation:
The volume of the milk in the measuring cup does not change when it is transferred to the mixing bowl.
Volume is the amount of space a body or substance occupies.
It is determined by the amount of matter that is present within a given measurement.
Since the amount of milk was accurately measured out, the volume is maintained when it is transferred to the mixing bowl. The reason why a measuring cup is used is to keep the consistency of the measurement.
Answer:
Is removed from the atmosphere by photosynthesis.
Explanation:
The carbon dioxide (CO2) is presented in the atmosphere and its cycle began with it's incoming by respiration, combustion of fuels and decomposition. The autotrophs, which realize photosynthesis, use CO2 as fuel to produce their food with Sun rays.
The CO2 comprises about 0.3% of the atmospheric gases, and in the past few years, its input is being higher than its removal of the atmosphere, which is aggravating the greenhouse effect. Besides, the atmosphere of Venus has higher levels of CO2.
The balanced chemical reaction is as shown below,
N₂ + 3H₂ --> 2NH₃
The equation shows that every 3 moles of hydrogen, H2, there would be 2 moles of ammonia, NH3, that is going to be formed. Using this concept, we solve for the unknown in this item.
Since we are restricted only of the number of hydrogen, it becomes our limiting reactant.
(6 moles H2) x (2 moles NH3/3 moles H2) = <em>4 moles NH3</em>
Therefore, given enough amount of N2, the amount of NH3 that can be formed out of the 6 moles of H2 is equal to 4 moles.
