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Dmitrij [34]
3 years ago
5

Which atom is abundant on earth​

Chemistry
2 answers:
Nadya [2.5K]3 years ago
4 0

Answer:

Oxygen

Explanation:

Oxygen is abundant on earth

denpristay [2]3 years ago
3 0

Answer:

oxygen

Explanation:

oxygen, which composes about 49.5% of the total mass of the Earth's crust, waters and atmosphere, according to the textbook “Modern Chemistry.” Silicon is second at 28%.28 Mac 1996

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What is the group of elements with the same number of valence electrons?
Leya [2.2K]

Answer:

All groups have the same number of valence electrons.

Explanation:

groups are the columns.

7 0
3 years ago
How many moles of NaCl are contained in 100.0 mL of a 0.20 M solution?​
AURORKA [14]

Answer:

0.02 mol.

Explanation:

8 0
3 years ago
Which property of an ancient rock allowed scientists to determine that Earth was at least 4.3 billion years old?(1 point)
vovangra [49]

Answer:

It Would be radioactive decay of the impurity, uranium, to become lead

Explanation:

3 0
3 years ago
During the reaction P4 + 5O 2 P4 O10, 1.5 moles of product was made in 30 seconds. What is the rate of reaction?
Brut [27]

Answer:

850g/min

Explanation:

The reaction expression is given as:

      P₄  +  5O₂   →   P₄O₁₀

Given that:

Number of moles of product  = 1.5moles

Time  = 30s = 0.5min

Unknown:

The rate of the reaction  = ?

Solution:

Convert the moles given to mass of the product.

     So;

     Mass of product  = number of moles x molar mass

Molar mass of P₄O₁₀   = 4(31) + 10(16)  = 284g/mol

    Mass of product  = 1.5moles x 284g/mol  = 426g

So;

 Reaction rate  = \frac{mass of product}{time}   = \frac{426}{0.5}   = 850g/min

8 0
3 years ago
A_________is the distance from one compression to the next compression in a longitudinal wave. (Page 2 Vocabulary)
Marina86 [1]

Answer:

wavelength

Explanation:

4 0
3 years ago
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