1. ice melting
<span>2. temperature going down at night </span>
<span>3. water evaporating (like a towel drying out) or water drop on the sink </span>
<span>4. dew forming on the mirror after a shower </span>
Answer:
Faster hydrogen burning means the star will grow larger and more luminous to allow the extra energy created to escape
The gram-formula mass means that the mass of one mole molecule. Then you just need to calculate the elements together. So the gram-formula mass of (NH4)3PO4 is equals to (14+4)*3+31+16*4= 149g/mol. So the answer is (c)
Answer:
Refer to the period table. Use the atomic mass for calculation. Multiply the atomic mass with the number of atoms. For example, Al2(SO4)3. (27 × 2) + (32 x 3) + (16 x 12) = molecular mass
