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3 years ago

Can DNA evidence exclusively conclude ancestry?

Chemistry

2 answers:

AnnZ [28]3 years ago

5 0

Answer:

I believe it can. If you give part of your body to a website it will trace back and give you information about your ancestry.

Explanation:

In-s [12.5K]3 years ago

4 0

Answer:yes

Explanation:

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If object A is placed on the pH scale at pH = 3 and object B is placed at pH = 8, which of the following must not be true?

ss7ja [257]

I believe the correct answer is D. Because object A on the pH scale reads pH=3. Which means it is more acidic in nature and thus possess a greater hydrogen or hydronium ion concentration than object B, which has a higher value on the pH scale. Object B would thus have a lower hydronium ion concentration than Object A.

8 0

2 years ago

What is the chemical formula of the following compound

OLga [1]

A. C3H10 is the answer

6 0

2 years ago

How many moles are in 75.0 grams of nitrogen gas, N2?

Westkost [7]

Given:

Mass of Nitrogen (N₂) gas = 75 grams

Finding the number of moles of N₂:

We know that the molar mass of N₂ is 28 grams/mole

Number of moles = Given mass / Molar mass

Number of moles = 75 / 28

Number of moles = 2.68 moles

Hence, there are 2.68 moles in 75 grams of Nitrogen Gas

7 0

2 years ago

It is desired to determine the concentration of arsenic in a lake sediment sample by means of neutron activation analysis. The n

Artyom0805 [142]

Answer:

The daughter nuclide is selenium; 76:34 Se

Explanation:

The complete question is as follows;

is desired to determine the concentration of arsenic in a lake sediment sample by means of neutron activation analysis. The nuclide 75:33 As captures a neutron to form 76:33 As, which in turn undergoes beta decay. The daughter nuclide produces the characteristic gamma rays used for the analysis. What is the daughter nuclide?

solution:

Please check attachment for decay equations and explanations

5 0

2 years ago

Which of the following adaptations found in animals in deciduous forests protects against predators?

statuscvo [17]

Answer:

The answer is D. Camouflage

7 0

2 years ago