Convection currents in the magma drive plate tectonics. Heat generated from the radioactive decay of elements deep in the interior of the Earth creates magma (molten rock) in the aesthenosphere. Theaesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the Earth that extends to 2900 km.
To determine the density, we use the following formula:

mass= 2.813 grams
volume= ?
we need to first calculate the volume before we can solve for the density. since the question states that the sample has a spherical shape, we can use the volume formula of spheres to find it.

radius (r)=

=

let's plug in the values
V=

we need to change the

to

using the following conversion
1 cm= 10 mm

now we can find the density.
density= 2.813 grams/ 0.268 cm=
10.5 g/cm3
Answer:
not a solid/ dissolved in water/ through melting because the ion's electrons have to be able to move freely and they can't do this when they are solids. they can occur
Answer:
Explanation:
Physical and chemical properties of acids:
Acids are sour in taste.
All acids have pH less than 7.
All acids turns blue litmus paper red.
Acids react with metals and form salts.
HCl + Mg → MgCl₂ + H₂
Acids react with base and form salt and water.
HCl + NaOH → NaCl + H₂O
Acids react with carbonates and form carbon dioxide, water and salt.
2HCl + CaCO₃ → CaCl₂ + H₂O + CO₂
Physical properties of bases:
All bases are bitter in taste.
They turn litmus paper from red to blue.
They are slippery.
All bases have pH above 7.
Bases react with acid and form water and salt.
NaOH + HCl → NaCl + H₂O
Bases conduct electricity.
Bases such alkali when react with water produces OH⁻.
Solute can be
1) solid -table salt (solute) and water,
2) liquid - alcohol and water,
3) gas - soft drinks -CO2 and water.