1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Deffense [45]
2 years ago
10

Identify which of the following statements about the isotopes of an element is correct.

Chemistry
1 answer:
kozerog [31]2 years ago
3 0

Answer:

A

Explanation:

because B is wrong as it doesn't have the same mass number. C is wrong as it has different number of neutrons. D is wrong as it has more neutrons than protons.

You might be interested in
How many atoms are in 6.3 moles of lead
densk [106]

Answer:

3.79 x 10²⁴atoms

Explanation:

Given parameters:

Number moles of lead  = 6.3moles

Unknown:

Number of atoms  = ?

Solution:

To solve this problem,

              1 mole of a substance contains  6.02 x 10²³ atoms

            6.3 mole of Pb  will contain 6.3  x 6.02 x 10²³ = 3.79 x 10²⁴atoms

4 0
3 years ago
1. When 8 moles of lithium metal react with excess oxygen gas, how many miles of lithium oxide can be produced?
mash [69]
2 moles of lithium oxide
5 0
3 years ago
Read 2 more answers
What is the molar mass of a gas which has a density of 0.00249 g/mL at 20.0 degrees celcius and 744.0 mm Hg?
creativ13 [48]

61.24 is the molar mass of a gas which has a density of 0.00249 g/mL at 20.0 degrees celcius and 744.0 mm Hg.

Explanation:

given that:

density = 0.00249 g/ml (\frac{mass}{volume})  or 2.49 grams/litre

P = 744 mm Hg OR 0.978 atm

T = 20 Degrees or 293.15 Kelvin

R = 0.08206 Litre atm/mole K

molar mass =?

Formula used/

PV = nRT    equation 1

here n is number of moles:

n = \frac{mass}{atomic mass}

putting the value of n and value of density in the equation 1:

PV = \frac{mass}{molar mass} x RT

molar mass = \frac{mass}{volume} x \frac{RT}{P}

                    = density x \frac{RT}{P}

                     = \frac{2.49 x 0.08276 x 293.15}{0.978}

                     = 61.24 is the molar mass of the gas.

8 0
2 years ago
A store employee first inflated a balloon with 1.53 moles of helium gas. When the customer said it needed to have a volume of 75
Leviafan [203]
The first volume milliliters are 328 mm
3 0
3 years ago
9! Direction: Create a K-W-H-L Chart (as seen below) and fill it to assess your prior knowledge and understanding of the topic.
Contact [7]

Answer:

what i don't understand

4 0
3 years ago
Other questions:
  • Ethene will not typically react with hydrogen gas through simple bimolecular collisions. Using the picture, explain how this rea
    10·1 answer
  • Which factor increases the rate of dissolution in an unsaturated solution?
    13·2 answers
  • One mole of carbon will have the same number of particles as one mole of hydrogen.
    5·2 answers
  • How fast do you think the air particles in this room are moving compared to a car going 50 mph (about 22m/s)? Put your answer is
    11·1 answer
  • A teaspoon of powdered caffeine can be as deadly as a teaspoon of ricin. <br><br> True or False
    9·2 answers
  • Amylose is a form of starch which has ________. only β-1,4-bonds between glucose units only α-1,4-links bonds glucose units hemi
    15·1 answer
  • Which phrase describes the charge and mass of a neutron? 1. a charge of +1 and no mass 2. a charge of +1 and an approximate mass
    8·2 answers
  • All of the following are agents of mechanical weathering EXCEPT ___________. wind temperature water gravity
    9·2 answers
  • Fire ants move in to a new environment with the lizards.what will most likely happen to the lizard population over the next seve
    5·1 answer
  • Match each type of learning to the correct definition
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!