Why does scientist use the metric system?

1 answer:

5 0

The metric system is easy for scientists all around the world, cause its a system used by everyone around the world to solve problems

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Absolute zero is

Dmitrij [34]

Answer:

The coldest temperature possible

Explanation:

Absolute zero = 0 K

A. is wrong. 0 °C = 273 K

B. is wrong. -210 °C = 63 K

C. is wrong. 32 °F = 273 K

E. is wrong. -196°C = 77 K

5 0

3 years ago

5. Hydrogen & oxygen react chemically to form water. How much water

stepladder [879]

39.25 g of water (H₂O)

Explanation:

We have the following chemical reaction:

2 H₂ + O₂ → 2 H₂O

Now we calculate the number of moles of each reactant:

number of moles = mass / molar weight

number of moles of H₂ = 14.8 / 2 = 7.4 moles

number of moles of O₂ = 34.8 / 32 = 1.09 moles

We see from the chemical reaction that 2 moles of H₂ will react with 1 mole of O₂ so 7.4 moles of H₂ will react with 3.7 moles of O₂ but we only have 1.09 moles of O₂ available. The O₂ will be the limiting reactant. Knowing this we devise the following reasoning:

if 1 moles of O₂ produces 2 moles of H₂O

then 1.09 moles of O₂ produces X moles of H₂O

X = (1.09 × 2) / 1 = 2.18 moles of H₂O

mass = number of moles × molar weight

mass of H₂O = 2.18 × 18 = 39.25 g

Learn more about:

limiting reactant

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6 0

3 years ago