Answer:
The mouth uses both mechanical and chemical digestion. Mechanical digestion involves physically breaking down the food into smaller pieces (using the jaw/teeth). However, chemical digestion then takes over and starts breaking down the food into simpler nutrients that can be used by the cells using saliva, which is naturally made within the mouth.
Hope this helps you! Have a great day! :D
Answer:
No
Explanation:
The density of a person stays the same no matter where they are in the universe
The two atoms shown in the equation are CALCIUM and oxygen.
<span>You start off with a neutral calcium atom with a shell of two electrons, a shell of 8 around that, a shell of 8 around that, and a shell containing 2...with no charge. </span>
<span>20 protons + 20 electrons. </span>
<span>You also have an oxygen atom with a shell of 2, and a shell of 6...with no charge. </span>
<span>8 protons + 8 electrons. </span>
<span>Each ionizes to form a calcium ion with 2 electrons removed (from the outer shell), leaving a +2 charge (20 protons, 18 electrons)... </span>
<span>and an oxygen ion with 2 electrons added (to the outer shell), leaving a -2 charge (8 protons, 10 electrons). </span>
<span>Their electrostatic attraction causes them to come together to form an ionic compound of CaO in a crystal lattice.</span>
Answer:
X is an electron and Y is a proton.
Explanation:
The particle X caries negative charge it means it have one extra electron.
When number of electrons becomes greater than protons particle have negative charge and
Particle Y attract particle X it means Y has positive charge because opposite charges attract each other and it must be a proton because proton has positive charge while neutron is neutral.
Symbol and charge of proton= P+
Symbol and charge of neutron= n0
Mass of proton=1.672623×10-27 Kg
Mass of neutron=1.674929×10-27 Kg
Symbol and charge on electron = e-
Mass= 9.10938356×10-31 Kg
Answer:
The answer is A, 1:2 and 1:4
Explanation:
This can be derived from looking at the balanced chemical equation. Notice the coefficients in front of each reactant and product. These show the mole ratios of each compound necessary to form the balanced equation.
N₂H₄ does not have a coefficient, which automatically becomes 1. H₂O₂ has a coefficient of 2, making the ratio between the two 1:2. H₂O has a coefficient of 4 making the ratio between hydrazine and water 1:4. Hope this helps!
