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umka2103 [35]
3 years ago
8

Scienests use critical thinking skills throughout the process of research or experimentation. A student notices than

Chemistry
1 answer:
zhenek [66]3 years ago
4 0

Answer:go read ur book and u will find it!!

Explanation:

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How many ATOMS of sulfur are present in 2.30 moles of sulfur trioxide?
zysi [14]

Answer:

1.39 Atoms

Explanation:

When converting from moles to atoms, multiply the number of moles by Avogadro's number

Multiply 2.30 moles by Avogadro's number (6.022*10^23)

= 1.3851 Atoms

=1.39 Atoms (sigfig)

8 0
3 years ago
How much heat has been lost when a 78 g piece of copper is placed into a calorimeter and cools from 120°C to
lora16 [44]

The amount of heat lost by the copper is 2402.4 J.

To Calculate the amount of heat lost, we use the formula below.

<h3>Formula:</h3>
  • Q = cm(t₂-t₁)................. Equation 1

<h3>Where:</h3>
  • Q = Amount of heat lost
  • c = specific heat capacity of copper
  • m = mass of copper
  • t₂ = Final temperature
  • t₁ = Initial temperature

From the question,

<h3>Given:</h3>
  • m = 78 g
  • c = 0.385 J/g°C
  • t₂ = 120°C
  • t₁ = 40°C

Substitute these values into equation 1.

  • Q = 78(0.385)(120-40)
  • Q = 2402.4 J

Hence, The heat lost by the copper is 2402.4 J

Learn more about heat here: brainly.com/question/13439286

3 0
2 years ago
Please answer!
evablogger [386]
1.) A compound is a substance that originates from two or more separate elements. It shares some similarities with a mixture.

2.) A compound has quite different properties from which it was formed. It also cannot be separated easily. Compounds are formed by chemical reactions.

3.) A pure substance has a constant composition and has consistent properties. It can be a compound or an element, but its composition is constant.

Hope this helps. :)
5 0
3 years ago
What are 5 most abundant elements in the Earth's crust​
allochka39001 [22]

Explanation:

Element Abundance percent by weight Abundance parts per million by weight

Oxygen 46.1% 461,000

Silicon 28.2% 282,000

Aluminum 8.23% 82,300

Iron 5.63% 56,300

4 0
3 years ago
Read 2 more answers
On the seashore pebbles that are rough and uneven become smooth and rounded explain how they become smooth and rounded
Andru [333]
The pebbles become smooth and even because of erosion. the waves from the sea rub against the pebbles this is erosion. x
7 0
3 years ago
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