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Ghella [55]
4 years ago
14

What are the two most common elements in the entire universe

Chemistry
2 answers:
g100num [7]4 years ago
5 0

Answer: Hydrogen and Helium

Explanation: Hydrogen is made from from one proton and one electron, making them one of the simplest forms of elements in the universe. Combining hydrogen atoms creates helium, the second most common element in the Universe.

vfiekz [6]4 years ago
4 0

The two most common elements in the entire universe are Helium and Hydrogen.

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Which is one way that in advance and biotechnology companies unintended consequence is that harm the environment?
pshichka [43]
One way that in advance and biotechnology companies unintended consequence is that harm the environment would be D. Genes implanted into a species of plant can spread to other plants.
6 0
4 years ago
Disadvantage and advantage of iodine ? <br><br><br>- umoren sŭm..​
valina [46]

THE ADVANTAGE OF IODIN

  • IODINE CAN LEAD TO GOITER AND OTHER THYROID PROBLEMS.

THE DISADVANTAGE OF IODIN

  • IODIN MAY LEAD TO THYROIDITIS AND THYROID PAPILLARY CANCER
6 0
3 years ago
What is Haber's process? Write it with chemical reaction.​
Lana71 [14]

Answer: Habers process is the industrial process used for the production of ammonia

N_2(g)+3H_2(g)\rightarrow 2NH_3(g)

Explanation:

Habers process is the industrial process used for the production of ammonia. It uses hydrogen from natural gas and nitrogen mainly from atmosphere under extremely high pressures (150-200atm) and moderately high temperatures (400-450^0C).

The catalyst used in Habers process is iron.

The balanced chemical reaction is:

N_2(g)+3H_2(g)\rightarrow 2NH_3(g)

7 0
3 years ago
Lead(II) nitrate is added slowly to a solution that is 0.0800 M in CT ions. Calculate the concentration of Pb2+ ions (in mol/L)
charle [14.2K]

Answer : The concentration of Pb^{2+} ion is 0.0375 M.

Explanation :

The balanced equilibrium reaction will be:

Pb^{2+}+2Cl^-\rightleftharpoons PbCl_2

The expression for solubility constant for this reaction will be,

K_{sp}=[Pb^{2+}][Cl^-]^2

Now put all the given values in this expression, we get:

2.40\times 10^{-4}=[Pb^{2+}]\times (0.0800)^2

[Pb^{2+}]=0.0375M

Therefore, the concentration of Pb^{2+} ion is 0.0375 M.

8 0
3 years ago
How many moles of calcium carbonate-CaCO3 = 4.15 g​
marin [14]

Answer:

Number of moles = 0.042 mol

Explanation:

Given data:

Number of moles = ?

Mass of calcium carbonate = ?

Solution:

Formula:

Number of moles = mass/ molar mass

now we will calculate the molar mass of calcium carbonate.

atomic mass of Ca = 40 amu

atomic mass of C = 12 amu

atomic mass of O = 16 amu

CaCO₃ = 40 + 12+ 3×16

CaCO₃ = 40 + 12+48

CaCO₃ = 100 g/mol

Now we will calculate the number of moles.

Number of moles = 4.15 g / 100 g/mol

Number of moles = 0.042 mol

3 0
4 years ago
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