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Yuki888 [10]
3 years ago
5

How can a scientist minimize bias in a scientific investigation

Chemistry
1 answer:
Viefleur [7K]3 years ago
5 0
By forming a conclusion or resolution based on only evidence.
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How many atoms are there in each of the following substances?
juin [17]

To know the number of atoms, it will be necessary to use the formula of avogadro. We calculate the number of moles then we can calculate the number of avogadro.

The molar mass of:

Phosphorus = 31g / mol

Mercury = 200 g / mol

Bismuth = 209 g / mol

Strontium = 87 g / mol.

The number of avogadro (N) is 6.023 10 ^ 23

n = m (mass) / M  (molar mass)

number of atoms = n. N = m / M  . N

number of phosphorus atoms = 5.14/31 . 6.023 10^23 = 9.98 10 ^ 22 atoms

Number of atoms of mercury = 2.16/200 . 6.023 10^23 = 6.5 10 ^ 21 atoms

Number of bismuth atoms = 1.8/209 . 6.023 10^23 = 5.18 10 ^ 21 atoms

Number of strontium atoms = 8.8 x 10-2 /87 . 6.023 10^23 = 6.09 10 ^ 20 atoms

3 0
3 years ago
Which statement is true about the atoms in helium gas?
True [87]
They are not closely packed or arranged orderly.

Hope this helps!
6 0
4 years ago
Read 2 more answers
What would be the pressure of a 5.00 mol sample of Cl₂ at 400.0 K in a 2.00 L container found using the van der Waals equation?
marusya05 [52]

Answer:

57.478atm

Explanation:

T = 400k

n = 5mol

v = 2.00

a = 6.49L^{2}

b = 0.0652L/mol

R = 0.08206

Formula

P =  \frac{RT}{(\frac{v}{n} )-b} - \frac{a}{(\frac{v}{n} )^{2} }

P = \frac{0.08206 * 400}{(\frac{2.00}{5.00} )-0.0652} - \frac{6.49}{(\frac{2.00}{5.00} )^{2} }

P = \frac{32.824}{0.3348} - \frac{6.49}{0.16}  

P = 98.041 - 40.563

P = 57.478atm

8 0
3 years ago
Can anyone help with any of these questions :)
hoa [83]

Answer: 1.D

2. A

3. D

Explanation:

6 0
3 years ago
Write your idea on the saying."we are what we eat"​
erma4kov [3.2K]

Explanation:

A way to maintain good health is from exercise, eating healthy foods, getting enough rest, keeping .The first mention of the phrase 'you are what you eat' came from the 1826 work Physiologie du Gout, ou Medetations de Gastronomie Transcendante, in which French author Anthelme Brillat-Savarin wrote: “Tell me what you eat and I will tell you what your are.”

8 0
3 years ago
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