Answer:
The element potassium(K) with atomic number 19 has the largest atomic radius ( around 225 picometers ).
Explanation:
There is the general expected decrease from left to right with increasing nuclear charge without quantum level expansion or increase in shielding and so pulling the outer electrons closer. The 3d block of metals (Z = 21 to 30) tend to be similar and in fact tend to go through a small minimum at Mn/Fe.
The potassium been on the left most part of period , has largest radius due to least nuclear pulling effect.
Answer:
Option 4) equal to
Explanation
When having a reversible reaction, this reaction (or system) reaches the balnace, it is observed that relative quantitives for all compounds (this is, reactives and products), remain constant
The species concentration does not change over time, and; in the same way; there are no physical changes as time goes by
For example, for the following reaction :
aA + bB ⇔ cC + dD
Compounds A and B react to give products C and D. The two way arrows means that this systme has reached the balance (is in equilibrium)
The chemical formula for steam is H2O(g)
mass of steam = mole of steam * molar mass of H2O
= 1 * (1*2+16) = 18 g
by E = m * c * change in temperature,
From 140C steam to 100C steam
18 * 2.01 * (140-100) = 1447.2J
latent heat of vaporization of water = 2.26x10^6 J/kg* 0.018 = 40680 J
From 100C water to 0C water
18 * 4.2 * (100-0) = 7560 J
latent heat of fusion of ice = 334 J/g * 18 g = 6012 J
From 0C ice to -45C ice
18 * 2.09 * (45-0)
= 1692.9 J
1447.2 + 40680 + 7560 + 6012 + 1692.9 = 57392.1 J
Answers (Based off of my understanding
1.) False, slowing down is decelerating, not accelerating.
2.) True, acceleration is the change in the rate of DISTANCE over time.
3.) True, even though an object is moving, it’s rate of movement is not changing, therefore it is not accelerating.
4.) False, if the plane rose 100mph in 2 hours, 2 / 100 = 50 mph.
5 & 6) Sorry man, can’t see the graphs, if you show them later though I can help you.
Go to the spanish site because I don’t think people here would be able to answer