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melamori03 [73]
3 years ago
9

If a 130-kg car is traveling at a velocity of 23 m/s, what is the kinetic energy of the car?​

Chemistry
2 answers:
Iteru [2.4K]3 years ago
5 0

Answer:

1/2*(23 ^2)*130=34385

AnnZ [28]3 years ago
3 0
KE = 1/2 * m * v^2
KE = 1/2 * 130 * 23^2
KE = 34385J
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Which element cannot be the central atom of a lewis structure?.
zalisa [80]

Answer:

Hydrogen

Explanation:

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5 0
2 years ago
How many anions are in 0.500 g of MgBr2
Oksana_A [137]

<u>Given:</u>

Mass of MgBr2 = 0.500 g

<u>To determine:</u>

Number of anions in 0.500 g MgBr2

<u>Explanation:</u>

Molar mass of MgBr2 = 24 + 2 (80) = 184 g/mol

Moles of MgBr2 = 0.500 g/184 g.mol-1 = 0.00271 moles

Based on stoichiometry-

1 mole of MgBr2 has 1 mole of Mg2+ cations and 2 moles of Br- anions

Therefore, 0.00271 moles of MgBr2 will have: 2 * 0.00271 = 0.00542 moles of Br-

Now,

1 mole of Br- contains 6.023 * 10²³ anions

0.00542 moles of Br- contain: 0.00542 * 6.023*10²³ = 3.264*10²¹ anions

Ans: There are 3.264*10²¹ anions in 0.5 g of MgBr2


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3 years ago
Identify an element as a metal or a non-metal according to its position in the Periodic<br> Table
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