Answer:
prison cells
Explanation:
Robert hook thought of prison cells when he first was the cells
Answer:
Robert Hooke called what he saw a cell because it reminded him of the cells in a monastery.
I hope this helps you
Which type of reaction is represented?
(1) single replacement (3) synthesis
(2) double replacement (4) decomposition
Answer: (1) single replacement
Explanation:
A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.Thus magnesium can easily lose electrons as compared to silver and result in the formation of magnesium nitrate and silver.
Double displacement is a chemical reaction in which ion exchange takes place.
Synthesis reaction is a chemical reaction in which two reactants combine to give a single product.
Decomposition is a chemical reaction in which one substance decompose to give two or more than two products.
B) 2HCL + Mg(OH)2 --> 2HOH + MgCl2
C) 2NaCl + H2SO4 --> Na2SO4 + 2HCl
D) Ca(OH)2 + Pb(NO3)2 --> Ca(NO3)2 + Pb(OH)2
I know the answer is A, but confused as to why that is. Can someone explain this for me? Thanks.
b. oxidation
c. decomposition
d. none of the above
Answer:
Option (A)
Explanation:
Radioactivity is defined as a process in which an unstable atomic nucleus decays continuously and after a specific period of time changes into a much more stable element. During this time of decay, the nucleus emits charged particles (energy) which are known as the α, β and γ particles. These are often emitted in the form of electromagnetic energy and are very dangerous to health.
The radioactive elements decay at a certain rate which is commonly known as the half-life. Half-life is basically defined as the time required by a radioactive substance to decay half of its initial composition.
Thus, the correct answer is option (A).
Answer:
No
Explanation:
Hello,
Since the sealed glass container is isolated (closed system) no escape of boiled water (steam) was presented, so it is obvious that the alchemists were wrong, it is impossible that the water turns into "earth" because it has components that water does not have by itself (metallic and nonmetallic ions and molecular compounds) that is why the solid residue could have come from suspended solids or simply solids that were initially dissolved and due to the boiling of water, they remained at the bottom of the flask. Nevertheless, the experiment done by Lavoisier was more precise because the conclusion based on the initial and final masses, accounts for the boiling process; besides, the mass agreement substantiates that no mass was removed due to the isolation of the flask.
Best regards.