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STatiana [176]
4 years ago
7

Okay so I have this presentation in science and I just have a quick question so my topic is “Ellipse” and I honestly don’t under

stand how the heck am I suppose to give a presentation abt a oval?? Can you guys give me Ideas I can do with my topic just ideas I’ll do the research lol cause I honestly don’t understand I know that earth orbits around the sun is the shape of an ellipse but’s that’s all I have thx guys
Biology
1 answer:
Roman55 [17]4 years ago
5 0
One topic you can talk about its closed plane curve, or talk about how it was discovered lol. Thats all i got never heard of a school working on “ellipse” thats crazy
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What will be the theoretcal yield of tungsten(s) ,W, if 45.0 g of WO3 combines as completely as possible with 1.50 g of H2? WO3(
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Answer:

Theoretical yield of tungsten produced = 35.6836915592  ≈ 35. 68 g

Explanation:

The chemical equation can be expressed as follows;

WO3 (s) + 3H2(g) → W(s) + 3 H20(g)

Note that the equation is already balanced.

Molecular Mass of WO3= 183.84 + 15.999 × 3 = 183.84 + 47.997  = 231.837 g

From the equation 1 mole of WO3 reacts with 3 mole of hydrogen molecule.

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1 mole of tungsten was produced from the chemical equation.

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From the equation,

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grams of tungsten produced = 183.84 × 45 /231.837

grams of tungsten produced = 8272.8 /231.837

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