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3 years ago

May you pls help I'm stuck on a quiz.

Chemistry

2 answers:

soldi70 [24.7K]3 years ago

6 0

Answer: nucleus

Explanation: Most DNA is located in the cell nucleus (where it is called nuclear DNA)

goldfiish [28.3K]3 years ago

5 0

Answer:

nucleus :)

Explanation:

most of the cells DNA is located in the nucleus

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Below is mgo. draw the structure of co2 and use curved arrows to show the movement of electron pairs. include lone electron pair

Mila [183]

The explanation with diagram is attached below

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3 years ago

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Which sequence represents the correct ranking of the amount of nitrogen per molecule, from least to most nitrogen? Urea, uric ac

Reptile [31]

Answer:

Ammonia, urea, uric acid

Explanation:

The given compounds are:-

Urea which has a molecular formula of $CH_4N_2O$ and has 2 atoms of nitrogen per molecule.

Ammonia which has a molecular formula of $NH_3$ and has 1 atom of nitrogen per molecule.

Uric acid which has a molecular formula of $C_5H_4N_4O_3$ and has 4 atoms of nitrogen per molecule.

Thus,

The order from least to most nitrogen is:-

Ammonia, urea, uric acid

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3 years ago

2055 Q. No. 10^-2

insens350 [35]

Answer:

Explanation:

Moles of KOH = $10^{-2}$

Volume of water = 10 liters

Concentration of KOH is given by

$[KOH]=\dfrac{10^{-2}}{10}\\\Rightarrow [KOH]=10^{-3}\ \text{M}$

$[KOH]$ is strong base so we have the following relation

$[KOH]=[OH^{-}]=10^{-3}\ \text{M}$

$pOH=-\log [OH^{-}]=-\log10^{-3}$

$\Rightarrow pH=14-3=11$

So, pH of the solution is 11

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3 years ago

How many grams of i2 are needed to react with 30.1 g of n2h4?

Nina [5.8K]

The reaction is,

H2S + I2 --------------> 2 HI +S

Molar weight of H2S = 34 g per mol

Molar weight of HI =128 g per mol

Molar weight of I2 =254 g per mol

Moles of H2S in 49.2 g = 49.2 /34 mol = 1.447 mol

So according to stoichiometry of the reaction, number of I2 mols needed

= 1.447 mol

The mass of I2 needed = 1.447 mol x 254 g

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3 years ago

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Which of the following choices has the ecological levels listed from largest to smallest?

wariber [46]

Answer:

the answer is something

Explanation:

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