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Sergio039 [100]
2 years ago
12

A 67.6 g sample of zinc is heated, then placed in a calorimeter containing 65.0 g of water. Temperature of water increases from

20.00 oC to 22.50 oC. The specific heat of zinc is 0.390 J/g⋅oC. What was the initial temperature of the zinc metal sample? (final temperatures of zinc and water are the same)
Chemistry
1 answer:
alexira [117]2 years ago
7 0

Answer:

Hi Im an online tutor and i can assist you with all your assignments. We have experts in all fields. check out our website https://toplivewriters.com/

Explanation:

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pav-90 [236]

Answer:

pH =  -  log(7.6 \times  {10}^{ - 5} )  \\ pH = 4.12

8 0
2 years ago
Someone please help me
Setler79 [48]

Answer:

8510 mol

Explanation:you must divide both of the molar masses into each other

5 0
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Which pair must represent atoms of the same element?
andrew-mc [135]
Your answer is B and the element is Carbon

So what your looking for is matching isotopes. Isotopes are elements that are the same in amount of protons but different in mass meaning different number in neutrons. Because when you add the total protons and neutrons together you get your atomic mass. So this can be written as X=said element, top number above=different atomic mass, bottom number below=atomic number. Hope this help!!

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4 0
2 years ago
La TEMPERATURA es un cambio físico o Químico?
gladu [14]
La temperatura es un cambio físico
6 0
3 years ago
When 3.00 moles of hydrogen molecules and 1.50 moles of oxygen molecules react, they form 3.00 moles of water
bearhunter [10]

Mass of Oxygen required : 24 grams

<h3>Further explanation</h3>

Given

3 moles of H

1.5 moles of O

3 moles of H₂O

Required

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Solution

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2H₂ + O₂ ⇒ 2H₂O

Mass of Oxygen for 1.5 moles of O :

= mol x Ar O

= 1.5 moles x 16 g/mol

= 24 grams

7 0
2 years ago
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