I need to know the element in group 15 in the periodic table .

The model on the right looks bumpy, but when you break a large salt crystal in two, the edges of the split often look straight a

emmasim [6.3K]

There is no problem with the model formed by atoms as solid spheres for macroscopic measurements because the atoms are extremely small.

<h3>What is Dalton's atomic model?</h3>

This was formulated in 1808 and states that atoms with spheres cannot be divided. It also states that solids are formed by contact between the spheres and chemical compounds from joining of atoms of two or more elements.

The size of the atoms in the form of sphere is very small as it is known that it is of the order of 10⁻⁹ m, therefore, having a macroscopic crystal more than 10⁻⁶ m in length which is why the model of the atom as solid spheres for macroscopic measurements has no problem.

Read more about Dalton's atomic theory here brainly.com/question/13157325

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5 0

1 year ago

Compare the compressibility of gases and liquids. Support your answer by describing the arrangement of particles in gases and li

Leokris [45]

Answer:

Gases are more compressible

Explanation:

The particles of gases have weak forces of attraction making them move in constant random motion making them easier to compress

6 0

3 years ago

If you burn 53.8 g of hydrogen and produce 481 g of water, how much oxygen reacted?

olga2289 [7]

The reaction:
2 H 2 + O 2 → 2 H 2 O
2 Hydrogen molecules react with 1 Oxygen molecule to create 2 molecules of water.
We have to convert 53.8 g of Hydrogen into moles:
53.8 : 2.02 g / moles = 26.63 moles
2 moles H 2 ↔ 1 mole O 2
26.63 moles H 2 ↔ 13.32 moles O 2
Mass ( O 2 ) = 13.32 moles · 32 g/moles = 426.2 g
Answer: 426.2 grams of Oxygen.

4 0

3 years ago

Assuming that the density of vinegar is 1.005 g/mL, calculate the molarity of acetic acid in vinegar from your average value for

Lapatulllka [165]

We can divide this problem into 4 steps:
Step 1: Calculate mass of one liter solution from the density
Mass of solution = 1000 ml soln x $\frac{1.005g soln}{1 mL}$ =1005 g soln
Step 2: Calculate the mass of acetic acid
Mass of CH₃COOH = 1005 g soln x (5.2 g / 100 g soln) = 52.26 g acetic acid
Step 3: Calculate the moles of acetic acid:
52.26 g acetic x (1 mole acetic / 60 g acetic) = 0.871 mol
step 4: Calculate the molarity of acetic acid:
molarity = moles of acetic / liters of soln = 0.871 / 1 L = 0.871 mole / L

4 0

3 years ago

Newton's First Law of Motion is also known as the Law of

vovangra [49]

Answer:

His first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. ... The amount of the change in velocity is determined by Newton's second law of motion.

Explanation:

4 0

3 years ago