3+
4N
what element is this?
1 answer:
Answer:
Selenium
Explanation:
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Two electrons in it's first energy level; eight electrons in it's second energy level; and six valence electrons in it's outermost energy level
The answer is D because the box b's force to the left is not being cancelled out and box d's force is trying to be cancelled out, but he has more force going up then down so he is moving up
Answer:
155.16 g.
Explanation:
Firstly, It is considered as a stichiometry problem. From the balanced equation: 2NaOH + H₂SO₄ → 2Na₂SO₄ + 2H₂O It is clear that the stichiometry shows that 2.0 moles of NaOH reacts with 1.0 mole of H₂SO₄ to give 2.0 moles of Na₂SO₄ and 2.0 moles of H₂O . We must convert the grams of water (57.0 g) to moles <em>(n = mass/molar mass)</em> . n = (57.0 g) / (18.0 g/mole) = 3.1666 moles .Now, we can get the number of moles of H₂SO₄ that is needed to produce 3.1666 moles of wate r. <em>Using cross multiplication: </em> 1.0 mole of H₂SO₄ → 2.0 moles of H₂O , <em>from the stichiometry of the balanced equation</em>.??? moles of H₂SO₄ → 3.1666 moles of H₂O .The number of moles of H₂SO₄ that will produce 3.1666 moles of H₂O <em>(57.0 g)</em> is (1.0 x 3.1666 / 2.0) = 1.5833 moles .Finally, we should convert the number of moles of H₂SO₄ into grams <em>(n = mass/molar mass)</em> . Molar mass of H₂SO₄ = 98.0 g/mole. mass = n x molar mass = (1.5833 x 98.0) = 155.16 g .
B. Electric current requires a specific path to follow.
The sun heats up the air at different rates. Weather is caused by uneven heating
