Choloroplasts are unique to plant cells.
They are used to absorb light energy, which animals don’t.
Therefore plants contain chloroplasts and animals don’t.
The molar mass of Na₂SO₄ -
2 x Na - 2 x23 = 46
1 x S - 1 x 32 = 32
4 x O - 4 x 16 = 64
total = 46 + 32 + 64 = 142 g/mol
the molarity of solution - 2.0 M
in 1 L of solution , 2.0 moles
Therefore in 2.5 L - 2 mol/L x 2.5 L = 5 mol
then the mass of Na₂SO₄ required = 142 g/mol x 5 mol = 710 g
<span>Answer: B) sound waves</span>
<span> There are 2 classifications of waves according to the media of propagation.</span>
<span> <span>Mechanical Waves – needs a medium, an example is sound waves. Sound waves do not travel through a vacuum. Sound waves move by replacing one particle with another. Particles vibrate and that is why we hear the sounds.</span> <span>Electromagnetic Waves and electrostatic waves are one but the same. They do<span> not require a medium. – an example is light waves.</span></span> </span>
Answer:
<em>1</em><em>0</em><em>4</em><em>7</em><em>.</em><em>7</em><em>8</em>
<em>nearest</em><em> </em><em>tens</em><em> </em><em>is</em><em> </em><em>1</em><em>0</em><em>4</em><em>7</em><em>.</em><em>7</em><em>0</em>
<em>near</em><em>est</em><em> </em><em>thousandth</em><em> </em><em>is</em><em> </em><em>1</em><em>0</em><em>5</em><em>0</em><em>.</em><em>7</em><em>8</em>