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natita [175]
4 years ago
11

An element's atomic number is 81. How many protons would an atom of this element have? protons

Chemistry
1 answer:
White raven [17]4 years ago
8 0
The number of protons is same as periodic table number.

In this case 81 Periodic table number element has 81 Protons.
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Why should scientists preform experiments
svetoff [14.1K]

Answer:

To test the accuracy of a hypothesis or any findings that have already been made  

Explanation:

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How many grams S03<br> are needed to make 400g<br> H₂So4 in 49%
NemiM [27]

160 g of SO3 are needed to make 400 g of 49% H2SO4.

<h3>How many grams of SO3 are required to prepare 400 g of 49% H2SO4?</h3>

The equation of the reaction for the formation of H2SO4 from SO3 is given below as follows:

SO_{3} + H_{2}O \rightarrow H_{2}SO_{4}

1 mole of SO3 produces 1 mole of H2SO4

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80 g of SO3 are required to produce 98 og 100%H2SO4

mass of SO3 required to produce 400 g of 100 %H2SO4 = 80/98 × 400 = 326.5 g of SO3

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Therefore, 160 g of SO3 are needed to make 400 g of 49% H2SO4.

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2 years ago
If the partial pressure of a gas produced in a reaction was determined to be 0.35 atm in a 161.0 ml container and at a temperatu
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Thank you for posting your question here at brainly. I hope the answer will help you. The number of moles of gas were produced the answer will be 0.0023 mol. 

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Hear n = 1000 to n = 2 pairs of quantum states of hydrogen has the biggest energy difference between the states

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