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Deffense [45]
3 years ago
7

James Watson and Francis Crick _____.

Chemistry
2 answers:
Mashutka [201]3 years ago
6 0
The answer is D because Franklin was the one who discovered it but could present it because she passed away
Dimas [21]3 years ago
3 0

Answer:

b

Explanation:

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Calculate these masses.
Alex
A) mass / volume = density
m/6.00cm3 = 13.5939g/cm3
m = 13.5939g/cm3 • 6.00cm3
m = 81.6g

B) mass / volume = density
m/25.0cm3 = 0.702g/cm3
m = 0.702cm3 • 25.0g/cm3
m = 17.6g

1mL = 1cm3
8 0
3 years ago
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Calculate the volume of 0.100 m hcl required to neutralize 1.00 g of ba(oh)2 (molar mass = 171.3 g/mol).
dedylja [7]

The balanced chemical equation between HCl and Ba(OH)_{2} is:

2HCl (aq) + Ba(OH)_{2}(aq) -->BaCl_{2}(aq) + 2 H_{2}O(l)

Moles of Ba(OH)_{2} = 1.00 g Ba(OH)_{2} * \frac{1 mol Ba(OH)_{2}}{171.3 g Ba(OH)_{2}} = 0.00584 mol Ba(OH)_{2}

Moles of HCl required to neutralize Ba(OH)_{2}:

0.00584 mol Ba(OH)_{2} * \frac{ 2 mol HCl}{1 mol Ba(OH)_{2}} =   0.01168 mol HCl

Calculating the volume of HCl from moles and molarity:

0.01168 mol HCl * \frac{1 L}{0.100 mol} * \frac{1000 mL}{1 L} = 116.8 mL

7 0
3 years ago
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Rutherford used his gold foil experiment as evidence for a new atomic model. He suggested that the atom contained a small
mart [117]

Answer:

The plum pudding model of the atom agreed with the nuclear model

Explanation:

6 0
3 years ago
Chemistry help!! I'll give 30 points!!!
malfutka [58]
1. 1/16 x 1 000 000= 62500
2. Each half life is 5750 years long
3. The end of a half life is found by dividing the beginning of the half life by 2.
4. The number 62500 is between the 7th and the 8th half lives (refer to the number of 14C atoms on my table)
5. The 7th half life is 40250 years, and the 8th half life is 46000 years.
6. Therefore, your estimate would be a number roughly in the middle of 40250 and 46000 (for example: 43000)
Hope this helps :)

5 0
4 years ago
An atom with 9 protons and 10 neutrons in its nucleus and 9 electrons in movement around the nucleus would be an atom of which e
Valentin [98]
The correct answer is C.  We know this is true since the number of protons an atom has is its atomic number.  Since this atom  has 9 protons, look for the element on the periodic table that has an atomic number of 9.  The element that has an atomic number of 9 is flouring.

I hope this helps.
5 0
3 years ago
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