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Arada [10]
3 years ago
10

2. You used a calorimeter in the Heat Transfer lab. Explain how the calorimeter works, and how to calculate the heat given off o

r absorbed by the reaction being studied.
Chemistry
1 answer:
Phoenix [80]3 years ago
6 0
A calorimeter works by having a known mass of known material combust or react in an enclosed space. The calorimeter has an agent for absorption of the heat released during the process of combustion or reaction. For example, the heat absorbing agent may be water. The change in temperature of the heat absorbent along with its specific heat capacity and mass are used to compute the energy released using the equation:
Q = mCΔT
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5. The element copper has naturally occurring isotopes with mass numbers of 63
natali 33 [55]

Answer:

63.616

Explanation:

DATA

1. first atomic mass;m1=63

  1. second atomic mass;m2=65
  2. first percentage;p1= 69.2%
  3. second percentage me;p2=30.8%
  4. average mass;avg= ?

SOLUTION

avg=<u> (m1)(p1) + (m2)(</u><u>p2</u><u>)</u>

100

avg= <u>(63)(69.2) + (65)(30.8)</u>

100

avg= <u>4</u><u>3</u><u>5</u><u>9</u><u>.</u><u>6</u><u> </u><u>+</u><u> </u><u>2</u><u>0</u><u>0</u><u>2</u>

100

avg= <u>6361.6</u>

100

avg= 63.616

4 0
3 years ago
Read 2 more answers
How many moles of KNO3 are needed to make 600 ml of a 1.3M solution?
ludmilkaskok [199]
M = n / V

Where, M is molarity (M or mol/L), n is number of moles of the solute (mol) and V is volume of the solution (L).

Here the solute is KNO₃.
 The given molarity is 1.3 M
 This means 1L of solution has 1.3 moles of KNO₃.

Hence moles in 600 mL = 1.3 M x 0.6 L = 0.78 mol

Therefore to make 1.3 M KNO₃ solution, needed moles of KNO₃ is 0.78 mol
7 0
3 years ago
Aces true or false, negatively charged particles in an atom are called electrons?
ZanzabumX [31]
True... atoms contain what are called electrons and protons. the protons being possitively charged and the elctrons being negatively charged
5 0
3 years ago
What happens to a sheet of copper as the average kinetic energy of the copper molecules decreases?
JulsSmile [24]

Answer:

<h2>It gets cooler.</h2>

Explanation:

<h2>Hopes this helps. Mark as brainlest plz!</h2>
8 0
3 years ago
Read 2 more answers
White phosphorus, P4, is prepared by fusing
damaskus [11]
2Ca3(PO4)2 + 6SiO2 + 10C ---> P4 + 6CaSiO3 + 10CO

1 mole of Ca3(PO4)2 = 310g
1 mole of P4 = 124g

according to the reaction:
2*310g Ca3(PO4)2----------------124g P4
x g Ca3(PO4)2 ------------------------ 30g P4
x = 150g Ca3(PO4)2

so, your answer is good
3 0
3 years ago
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