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Goryan [66]
3 years ago
6

The following diagram of a pendulum shows the path it takes as it swings back and forth.

Chemistry
2 answers:
JulsSmile [24]3 years ago
6 0
The answer would be B
lbvjy [14]3 years ago
4 0
I believe it should be B
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A solution...
steposvetlana [31]

Answer:

A

Explanation:

8 0
3 years ago
Read 2 more answers
When the metal was placed in the calorimeter, its temperature dropped to the equilibrium temperature. Calculate the change in te
MAVERICK [17]

Answer:

1st one= -79.6

2nd one= -80

3rd one= -81.2

Explanation:

Good luck!

5 0
3 years ago
Read 2 more answers
I NEED HELP!!!
True [87]

Answer:

Explanation:

Formula

Heat = m * c * delta t

t = temperature in centigrade.

The first thing you have to do is convert kelvin degrees to centigrade. The conversion factor is - 273. The formula is degrees centigrade = degrees kelvin - 273. It is easier to understand with a couple of examples.

  • 290o K = 290 - 273 = 17
  • 325. K =   325 - 273 = 52

Solution

Heat = 100.0 grams * 4.18 J/g*C * (52 - 17)

Heat = 100 * 4.18 * 35

Heat = 14630 Joules

But you want kj

Heat = 14630 / 100 = 14.63

Answer

Heat = 14.6 kj

6 0
2 years ago
Use stoichiometry to determine how many moles of O2 are needed
STALIN [3.7K]

Answer:

11.25 moles of O₂.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

C₃H₈ + 5O₂ —> 3CO₂ + 4H₂O

From the balanced equation above,

1 mole of C₃H₈ reacted with 5 moles of O₂.

Finally, we shall determine the number of mole of O₂ needed to react with 2.25 moles of C₃H₈. This can be obtained as follow:

From the balanced equation above,

1 mole of C₃H₈ reacted with 5 moles of O₂.

Therefore, 2.25 moles of C₃H₈ will react with = 2.25 × 5 = 11.25 moles of O₂.

Thus, 11.25 moles of O₂ is needed for the reaction.

7 0
3 years ago
Which element has properties most similar to those of chromium? Why?
Ludmilka [50]

Answer:

Answer : Molybdenum (Mo) and Tungsten (W)

Explanation:

because their properties are similar to that of Chromium (Cr) because it belongs to group 6 in the modern periodic table.

3 0
3 years ago
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