Answer:
ΔU = -6.2 × 10⁴ J
Explanation:
The system absorbs 965 J of heat, that is, q = 965 J.
The work (w) can be calculated using the following expression.
w = -P . ΔV
where,
P is the external pressure
ΔV is the change in the volume
w = - (1.90 × 10⁵ N/m²) × (0.51 m³ - 0.18 m³) = -6.3 × 10⁴ J
The change in the internal energy (ΔU) is:
ΔU = q + w = 965 J + (-6.3 × 10⁴ J) = -6.2 × 10⁴ J
Answer:
Nanomachines will work with atoms, not nuclei. The smallest unit of a chemical element, about a third of a nanometer in diameter. Atoms make up molecules and solid objects.
Explanation:
Answer:
The geometric shape of a CH4 molecule distributes the charges symmetrically.
Explanation:
The dipole moment is ruled by the compound's geometry and elements electronegativity difference.
Arranging the forces acording to the elements electronegativity difference withing the molecule geometry will yeld the dipole moment.
If the forces cancel out, it is a nonpolar compound.
If the forces does not cancel out it is a polar compound.
Picture of such analysis for methane is attached.
Use higher concentration of acid to produce 2 moles of hydrogen to form water
Answer:
(b) amino group
e) carboxyl group
Explanation:
The functional group in an organic compound distinguishes it from other compounds. It is usually the site where chemical reactions takes place.
CH₃-HC(NH₂)-COOH
There are two functional groups in this organic compoud:
- The NH₂ group is called the amino group
- The COOH is a carboxyl group
