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Akimi4 [234]
3 years ago
9

Erica is competing in the shot put event at a track meet. She hurls a shot with a mass of 4 kilograms at a speed of 9 meters/sec

ond. The shot’s kinetic energy is joules.
Chemistry
1 answer:
saw5 [17]3 years ago
7 0

Answer:

We have: K.E. = mv² / 2

here, m = 4 Kg

v = 9 m/s

Substitute their values into the expression:

K.E. = (4)(9)² / 2

K.E. = (4)(81) / 2

K.E. = 324 / 2

K.E. = 162 Joules

In short, Your Answer would be 162 J

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4.00 moles of CU(CN)2<br><br>Find the number of grams ​
UNO [17]

Hey there!

Cu(CN)₂

Find the molar mass.

Cu: 1 x 63.546 = 63.546

C: 2 x 12.01 = 24.02

N: 2 x 14.07 = 28.14

-----------------------------------

                      115.706 grams

The mass of one mole of Cu(CN)₂ is 115.706 grams.

We have 4 moles.

115.706 x 4 = 463

4.00 moles of Cu(CN)₂ has a mass of 463 grams.

Hope this helps!

6 0
3 years ago
A gas occupies a volume of 750 mL at 101.3 kPa. What pressure (in kPa) is needed to decrease the volume to 250mL?
lidiya [134]

Answer:

The final pressure of the gas comes out to be 303.9 KPa

Explanation:

Initial volume of gas = V = 750 mL

Initial pressure of gas = P = 101.3 KPa

Final volume of gas = V' = 250 mL

Assuming final pressure of the gas to be P' KPa.

Assuming temperature to be kept constant.

The final pressure can be obtained by following expression shown below

PV = P'V' \\101.3\textrm{ KPa}\times 750\textrm{ mL} = P' \times 250 \textrm{ mL}  \\P' = 303.9 \textrm{ KPa}

Final pressure of gas = 303.9 KPa

3 0
3 years ago
PLEASE HELP!! 73 POINTS!!
Reil [10]

Answer:

i am sorry i can not help with that there isnt enough information to work with   if you can tell me what you think about the topic i can help you put together a doc

Explanation:

6 0
3 years ago
What is the electron configuration of ClS2?
miss Akunina [59]

Answer:Chlorine

Explanation:The distribution of electrons in an atom is called as Electronic Configuration. Formula 2n2 helps in the determination of the maximum number of electrons present in an orbit, here n= orbit number. The formula helps in determination of arrangement of electrons and is known as “Bohr Bury Schemes.”

4 0
3 years ago
Write the relation between group number and electronic configration
anygoal [31]

Answer:

Explanation: the number of circles in the electronic configuration of an element is represented in the periodic table as the period number that element is situated in. the number of electrons in the outermost shell of an element is represented in the periodic table as the group number that element is situated in.

6 0
3 years ago
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