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ratelena [41]
2 years ago
5

Why is the cloning of Dolly the sheep important to humans? Animals that produce human medicines could be cloned. Cloned animals

help us understand how bacteria reproduce. Animals that are cloned produce better meat. Cloned animals can produce more offspring.
Chemistry
2 answers:
hodyreva [135]2 years ago
6 0

Answer:

it is a

Explanation:

Animals that produce human medicines could be cloned.

a_sh-v [17]2 years ago
5 0

Answer:

C. better meat

Explanation:

Farmers always are looking to better their stock to possibly increase milk production or increase the meat quality.

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In a chemical reaction, 300 grams of reactant A are combined with 100 grams of reactant B. Both A and 
IgorLugansk [536]

400 grams. Due to the law of consevation of mass. It states that mass quantitu must remain constant.

6 0
3 years ago
13.What volume of hydrogen gas is produced when 92.4 g of sodium reacts completely according to the following reaction at 25 °C
Anastaziya [24]

Answer:

44.8L of hydrogen gas

Explanation:

The reaction expression is given as:

            2Na   +  2H₂O   →    2NaOH    +  H₂

Given parameters:

Mass of sodium  = 92.4g

Unknown:

Volume of hydrogen gas  =  ?

Solution:

To solve this problem:

            1 mole of a substance at STP occupies a volume of  22.4L

Let us find the number of moles of the hydrogen gas;

 Number of moles of Na = \frac{mass}{molar mass}  

      Molar mass of Na = 23g/mol

 Number of moles  = \frac{92.4}{23}    = 4.02mole

From the balanced reaction expression:

       2 mole of Na will produce 1 mole of hydrogen gas

     4.02 mole of Na will produce \frac{4.02}{2}   = 2mole of hydrogen gas

So

         1 mole of a substance at STP occupies a volume of  22.4L

        2 mole of hydrogen gas will occupy a volume of 2 x 22.4  = 44.8L of hydrogen gas

5 0
2 years ago
A 400. 0 g sample of liquid water is at 30. 0 ºc. how many joules of energy are required to raise the temperature of the water t
Agata [3.3K]

Energy required to raise the temperature from 35°C - 45 °C= 25116 J.

specific heat, the quantity of warmth required to raise the temperature of one gram of a substance by means of one Celsius degree. The units of precise warmth are generally energy or joules consistent with gram according to Celsius diploma. for instance, the unique warmth of water is 1 calorie (or 4.186 joules) according to gram in step with Celsius degree.

solving,

Sample of liquid = 400. 0 g

temperature = 30. 0 ºc

joules of energy are required to raise the temperature of the water to 45. 0 ºc

therefore rise in temperature 45 - 30 = 15°C

Specific heat capacity = 4.186 J/g m °C

In kelvin = 273 + 15 = 288

          = ∴ energy required = Q = m s ( t final - t initial)

            =  400*4.186 * 15

           = 25116 joule

Learn more about specific heat here:-brainly.com/question/21406849

#SPJ4

7 0
1 year ago
Part C<br> Number of molecules in 8.437x10-2 mol C6H6
N76 [4]

Answer:

There are 5.08\times 10^{22}\ \text{molecules of}\ C_6H_6  

Explanation:

In this problem, we need to find the number of molecules in 8.437\times 10^{-2} mol of C_6H_6.

The molar mass of C_6H_6 is 6\times 12+1\times 6=78\ g/mol

No of moles = mass/molar mass

We can find mass from above formula.

m=n\times M\\\\m=8.437\times 10^{-2}\ mol\times 78\ g/mol\\\\m=6.58\ g

Also,

No of moles = no of molecules/Avogadro number

N=n\times N_A\\\\N=8.437\times 10^{-2}\times 6.023\times 10^{23}\\\\N=5.08\times 10^{22}\ \text{molecules}

Hence, there are 5.08\times 10^{22}\ \text{molecules of}\ C_6H_6  

5 0
3 years ago
A compound is 79.94g carbon, 26.82g hydrogen, and 93.24g nitrogen. What is the empirical formula?
Pani-rosa [81]

Answer:

i dont know

Explanation:

sorry

5 0
2 years ago
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