Use the values of A, which follow to answer the questions below.
H=1; C = 12; N= 14; O = 16; Ne = 20; Na = 23;
Mg = 24; S = 32; K= 39; Fe = 56; Cu= 63.5; Zn = 65.
One mole of any gas at rtp occupies 24 dm3.
1 Calculate the number of moles in:
a 2g of neon atoms
b 4g of magnesium atoms
( 24g of carbon atoms.

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

Naoki's bicycle has a mass of 10 kg. if naoki sits on her bicycle and starts pedaling with a force of 168 n, causing an acceleration of 2.8 m/s2, what is naoki's mass?

Remember to use the proper number of significant figures and leading zeros in all calculations.gelatin has a density of 1.27 g/cm³. if you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g2500 g3.9 x 10-43.937x 10-4