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AnnZ [28]
3 years ago
6

How many neutrona do Po 211 and Po 215 have?​

Chemistry
1 answer:
Fed [463]3 years ago
3 0

127 and 138

Explanation:

    Atomic representation:

               ²¹¹₈₄Po                     ²¹⁵₈₄Po

An atom is made up of protons, neutrons and electrons:

   The number of protons and neutrons makes up the mass number of an atom

The number of protons are the atomic number

     ²¹¹₈₄Po    

 211 is the mass number of polonium

  84 is the atomic number:

     Number of neutrons = Mass number - atomic number(number of protons)

    Number of neutrons = 211 - 84 = 127

For   ²¹⁵₈₄Po

  Number of neutrons = 215 - 84 = 138

Learn more:

Neutrons brainly.com/question/6837201

#learnwithBrainly

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Warm air _____.
svp [43]

Answer:

cools as it rises, then sinks back down

Explanation:

The movement of air is a convection current. Convection currents occur when warm air rises, cools down, and sinks due to gained density, replacing the warm air closer to the ground, creating a cycle.

5 0
3 years ago
What is the maximum mass of P2I4 that can be prepared from 8.80g of P4O6 and 12.37g of iodine according to the reaction:
Dvinal [7]
The balanced chemical reaction would be as follows:

<span>5P4O6 +8I2 ---> 4P2I4 +3P4O10

We are given the amount of reactants used for the reaction. We first need to determine the limiting reactant from the given amounts. We do as follows:

8.80 g P4O6 (1 mol / </span><span>219.88 g) = 0.04 mol P4O6
12.37 g I2 ( 1 mol / </span><span>253.809 g ) = 0.05 mol I2

Therefore, the limiting reactant is iodine since less it is being consumed completely in the reaction. We calculate the amount of P2I4 prepared as follows:

0.05 mol I2 ( 4 mol P2I4 / 8 mol I2 ) (</span><span>569.57 g / 1 mol) = 14.24 g P2I4</span>
8 0
3 years ago
Read 2 more answers
Anhydrous copper sulphate can be used in a test for water. What two things will happen when water is added to anhydrous copper s
Misha Larkins [42]

Answer:

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2 years ago
1. 17.0 grams of xenon hexafluoride is in a solid container. How many milliliters of that gas
BlackZzzverrR [31]

Answer: The volume of gas is 3020 ml

Explanation:

According to ideal gas equation:

PV=nRT

P = pressure of gas = 821.4 torr =  1.08 atm     (760 torr = 1atm)

V = Volume of gas in L = ?

n = number of moles = \frac{\text {given mass}}{\text {Molar mass}}=\frac{17.0g}{245.28g/mol}=0.069mol

R = gas constant =0.0821Latm/Kmol

T =temperature =302.7^0C=(302.7+273)K=575.7K

V=\frac{nRT}{P}

V=\frac{0.069mol\times 0.0821Latm/K mol\times 575.7K}{1.08atm}=3.02L=3020ml

Thus volume of gas is 3020 ml

4 0
3 years ago
Structural Formulas for Covalent Molecules
rosijanka [135]

Answer:

  1. CFJA17
  2. THZ561
  3. GJA561
  4. GH68
  5. N461
  6. DG56
  7. BSJ57

HOPE IT HELPS THANK ME LATER.

6 0
3 years ago
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