How many kilojoules of heat energy are

absorbed when 100.0 g of water are heated

from 20.0°C to 30.0°C?

(1) 4.18 kJ

(3) 418 kJ

(2) 41.8 kJ

(4) 0.418 kJ

Element that has two isotopes has an average atomic mass of 199.7. if 75.56% of the atoms of the element have an atomic mass of 197.4, what is the atomic mass of the other isotope?

After a covalent bond has stabilized an atom, the atom will have

Convert. 035 gallons to liters

What will happen to a iron nail kept in water for some day

In a closed system containing three different gases as shown, X2 + Y2 = 2XY

The balanced equation for the generation of sugar from sunlight water and co2 is

Isotopes of the same element have different ... A. Positions on the periodic table b. atomic numbers C. Mass number

How many moles of O2 are needed to make 1.98 moles of SO3

How many protons are in the nucleus of isotopes L?

What is the empirical formula for a compound that contains 38.77% Cl and 61.23% O?