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
Likurg_2 [28]
4 years ago
10

Dmitri Mendeleev and Henry Moseley developed their periodic tables about forty years apart. During that time, many discoveries i

n chemistry were made. Which fact was most likely discovered between the time of Mendeleev’s table and the time of Moseley’s table that helped Moseley develop his version? Atomic mass is the average mass of different samples of the same element. Different elements can have similar chemical properties even if their atomic masses are different. The number of protons in an atom is different than the atom’s total mass. Protons strongly affect an element’s atomic mass, while the electrons in atoms do not.
Chemistry
2 answers:
Travka [436]4 years ago
6 0

Answer:

Its C

Explanation:

Sindrei [870]4 years ago
4 0

Answer:

The first one I think

Explanation:

You might be interested in
In the following compound (HCl) How many electrons are gained and lost by each atom?
Verizon [17]

Explanation:

In HCL, one positive atom is given to chlorine from hydrogen so that it can complete it's octate. chlorine take one electron from hydrogen.

In NaCl, Sodium takes one electron from chlorine to complete its orbit with eight electrons. Chlorine gives one electron to sodium.

8 0
3 years ago
In water, Vanillin, C8H8O3, has a solubility of 0.070 moles of vanillin per liter of solution at 25C. What will be produced if 5
Rufina [12.5K]

Answer:

The full amount (5.00 g) will be dissolved in 1 L of water at 25°C.

Explanation:

The molecular weight (MW) of Vanillin (C₈H₈O₃) is calculated from the chemical formula as follows:

MW(C₈H₈O₃) = (12 g/mol x 8) + (1 g/mol x 8) + (16 g/mol x 3) = 152 g/mol

If 0.070 mol of C₈H₈O₃ are soluble per liter of water at 25°C, the maximum mass that can be dissolved in 1 L is:

0.070 mol x 152 g/mol = 10.64 g

Since 5.00 g is lesser than the maximum amount that can be dissolved (10.64 g), the added amount will be completely dissolved in 1 L of water at 25°C.

7 0
3 years ago
I am the alkali metal that would be most likely to melt on a very hot day.
zalisa [80]
Rubidium is the alkali metal that would melt on a hot day.
5 0
3 years ago
How many neutrons does an element have if its atomic number is 41 and its mass number is 170?
BARSIC [14]

atomic number = protons.

protons+neutrons=atomic mass.

170 (mass) - 41 (proton/number) = 129

that should be ur answer. I hope this helps!

7 0
4 years ago
Which type of force is the magnet using to move the nail?
geniusboy [140]

Answer: Nail moving towards a magnet

Explanation: Since the iron nails and pins move towards the magnet, it means that the magnet exerts a force on them. The force exerted by a magnet is called magnetic force.

7 0
3 years ago
Other questions:
  • Whitch of the following is a true statement about the magnetic field between two magnets
    6·1 answer
  • How many oxygen molecules are in 22.4 liters of oxygen gas at 273 K and 101.3 kPa?
    8·1 answer
  • Name the five practices that are part of the scientific inquiry process.
    15·1 answer
  • 11. The least chemically reactive of the hydrocarbon
    15·1 answer
  • A sample of nitrogen gas had a volume of 500. mL, a pressure in its closed container of 740 torr, and a temperature of 25 °C. Wh
    15·1 answer
  • What is the difference between a heterogeneous mixture and a solution?
    5·1 answer
  • The standard free-energy changes for the reactions below are given.Phosphocreatine → creatine + Pi ∆ G'° = –43.0 kJ/molATP → ADP
    7·1 answer
  • What is the standard enthalpy change for the decomposition of one mole of SO3?
    13·1 answer
  • Oxygen Supply in Submarines Nuclear submarines can stay under water nearly indefinitely because they can produce their own oxyge
    14·1 answer
  • If 18.7ml of 0.01500M aqueous HCl is required to titrâtes 15.00ml of an aqueous solution of NaOH to the equivalence point, what
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!