2 years ago

An element has 3 electrons, 3 protons and 4 neutrons. What will be its atomic number and mass number? (

Chemistry

1 answer:

stiv31 [10]2 years ago

8 0

Answer:

its atomic number will be 3 and it's mass number will be 7. it is lithium

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Which is an example of parasitism?

Doss [256]

Answer: A, C, D

Explanation:

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3 years ago

Assuming you have 6.24 x 1014 electrons and the surface area of the pail is 0.2 m2, what is the charge density (C/m2)?

pentagon [3]

Answer:

σ = 4.998 E-4 C/m²

Explanation:

1 Coulomb (C) ≡ 6.241509 E18 electrons (e)

∴ # elect = 6.24 E14 elect

charge (Q):

⇒ Q = (6.24 E14 elect)/( 1 C /6.241509 E18 elect) = 9.998 E-5 C

charge density (σ):

σ = Q/S

∴ surface area (S) = 0.2 m²

⇒ σ = ( 9.998 E-5 C ) / ( 0.2 m²)

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3 years ago

What is the [ H3O+] of a solution with pH = (8.50x10^0)? enter your answer in scientific notation and with three sig figs.

erastovalidia [21]

Answer:

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The pH is calculated with the formula:

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From here the concentration of hydronium ion (H₃O⁺) will be:

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3 years ago

Read 2 more answers

How would the concentration of silver ions compare in a 1.0 x 10-16 L saturated solution to a 1.5 x 10-16 L saturated solution?

VMariaS [17]

The second one is more concentrated as they both times with the same thing but the second one (1.5) is bigger

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3 years ago

you are given 500 mL of a 5M stock solution of ammonium chloride but for your experiment, you only need 100 mL of a 0.65M soluti

mafiozo [28]

Answer:

13ml

Explanation:

to prepare dis solution first you need a volumetric flask of 100ml calibrated .
using dilution formulae u will need 13ml from the stock
measure 13ml of the 5M stock of the 500ml
then drop it into the 100ml calibrated flask
then add water till it reach d mark and you shake thoroughly

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3 years ago

An element has 3 electrons, 3 protons and 4 neutrons. What will be its atomic number and mass number? (​

An element has 3 electrons, 3 protons and 4 neutrons. What will be its atomic number and mass number? (