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Schach [20]
3 years ago
5

PLEASE HELP SOMEONE PLEASEEEE

Chemistry
1 answer:
crimeas [40]3 years ago
4 0

Answer:

the answer is b

hope this helps you!!

Have a lovely day!

-millie :D

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Are specimens the best source of DNA
xxTIMURxx [149]

no the best source is blood.

5 0
4 years ago
Ammonia (NH3) is widely used as a fertilizer
ratelena [41]

Answer:

82.28g

Explanation:

Given parameters:

Number of moles of hydrogen gas = 7.26 moles

Unknown:

Amount of ammonia produced = ?

Solution:

We have to write the balanced equation first.

              N₂    +   3H₂    →    2NH₃

Now, we work from the known to the unknown;

   

                  3 moles of H₂ will produce 2 moles of NH₃

                7.26 mole of H₂ will produce \frac{7.26 x 2}{3}  = 4.84 moles of NH₃

Molar mass of NH₃ = 14 + 3(1) = 17g/mol

Mass of NH₃  = number of moles  x molar mass = 4.84 x 17 = 82.28g

3 0
3 years ago
A new process converts potential energy of an object to kinetic energy. Neither work nor eat is added to the system. No reaction
blagie [28]

Answer:

Change in height of the object

Explanation:

Change in height of the object

Since ,

We know potential energy can be written as mgh where

P.E. = mgh

M = mass ,

g = gravity constant

h = height

Kinetic energy can be written as 0.5 mv²

So , the Potential energy = kinetic energy

Then ,

velocity of object = √2 gh

Since g is a constant ,

Hence ,

Height of object will determine the velocity.

5 0
4 years ago
Barium chloride solution was used to test for sulfate ions in the presence of dilute hydrochloric acid. What color precipitate w
Pani-rosa [81]

Answer:

white

Explanation:

A white precipitate of barium sulfate forms if sulfate ions are present. The hydrochloric acid is added first to remove any carbonate ions that might be present - they would also produce a white precipitate, giving a false positive result. Barium nitrate solution can be used instead of barium chloride solution

5 0
3 years ago
18.0 mL of water contains 6.022 x 1023 water molecules. How many hydrogen atoms are in 1.00 L of water? (Each water molecule, H2
brilliants [131]

Solution :

lt is given that in 18 mL of water their are 6.022\times 10^{23} water molecules.

We know, that 1 molecule of water contains 2 atoms of hydrogen.

Hydrogen atom in 18 mL water is,

2\times 6.022\times 10^{23} = 12.044 \times 10^{23} .

So, number of hydrogen atoms in 1 L = 1000 mL are :

N = \dfrac{1000}{18}\times 12.044\times 10^{23}\\\\N = 6.69 \times 10^{25}\ atoms

Hence, this is the required solution.

3 0
3 years ago
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