1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lina20 [59]
3 years ago
6

H2 H2O H2O2 CH4 All four examples represent

Chemistry
2 answers:
miv72 [106K]3 years ago
8 0
It is covalent  bonds
satela [25.4K]3 years ago
7 0

Answer: molecules


Justification:


1) Given formulas: H₂, H₂O, H₂O₂, CH₄.


2) A molecule is the chemical combination of two or more atoms through covalent bonds.


3) Non-metals only can bond among them by covalent bond, i.e. by sharing electrons.


Two nonmetals cannot bond to each other in other way (ionic bonds) because any of them will not be willing to release an electron completely.


Since the two nonmetal elements just need a few more electrons to complete their respective valence electron shell, they will do it by sharing electrons instead of releasing them.

You might be interested in
An ionic bond forms between sodium chorine when the sodium atoms _______ electrons.
Natalija [7]

is 7 cus  the valance electron for sodium is Ne 3s1  and for chlorine is Ne 3s13p5

4 0
3 years ago
Which example is a trace fossil? {A} dinosaur egg {B} dinosaur footprint {C} dinosaur bone {D} shark tooth
viktelen [127]

dinosaur footprint

Explanation:

A dinosaur footprint is an example of a trace fossil. A trace fossil is a type of fossil that shows the activities of organisms that lived in the past.

  • Fossils are the preserved remains of organisms that lived several years ago.
  • Fossils are usually found in sedimentary rocks and thick layers of ice in temperate and polar regions.
  • Body fossils are the remains of the body parts of an organism that has been preserved. They can be skeletal parts, teeth, eggs e.t.c
  • A trace fossil shows the preserved remains of the activities of an organism.
  • They can be fingerprints, burrows and borings, feccal pellets e.t.c

Learn more":

fossils and evolution brainly.com/question/12790206

#learnwithBrainly

5 0
3 years ago
Read 2 more answers
Which type of electromagnetic wave has the most energy?
Leto [7]

Answer:

Gamma rays

Explanation:

6 0
2 years ago
Read 2 more answers
A sample of O2 gas occupies a volume of 571 mL at 26 ºC. If pressure remains constant, what would be the new volume if the tempe
Vlad1618 [11]

Answer: The new volume at different given temperatures are as follows.

(a) 109.81 mL

(b) 768.65 mL

(c) 18052.38 mL

Explanation:

Given: V_{1} = 571 mL,       T_{1} = 26^{o}C

(a) T_{2} = 5^{o}C

The new volume is calculated as follows.

\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\\\frac{571 mL}{26^{o}C} = \frac{V_{2}}{5^{o}C}\\V_{2} = 109.81 mL

(b) T_{2} = 95^{o}F

Convert degree Fahrenheit into degree Cesius as follows.

(1^{o}F - 32) \times \frac{5}{9} = ^{o}C\\(95^{o}F - 32) \times \frac{5}{9} = 35^{o}C

The new volume is calculated as follows.

\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\\\frac{571 mL}{26^{o}C} = \frac{V_{2}}{35^{o}C}\\V_{2} = 768.65 mL

(c) T_{2} = 1095 K = (1095 - 273)^{o}C = 822^{o}C

The new volume is calculated as follows.

\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\\\frac{571 mL}{26^{o}C} = \frac{V_{2}}{822^{o}C}\\V_{2} = 18052.38 mL

8 0
2 years ago
A student is instructed to make 1 L of a 2.0 M solution of CaCl2 using dry salt. How should he do this?
Pachacha [2.7K]
<span>The student should follow following steps to make 1 L of </span>2.0 M CaCl₂.<span>
<span>
1. First he should calculate the number of moles of 2.0 M CaCl</span></span>₂ in 1 L solution.<span>

</span>Molarity of the solution = 2.0 M<span>
Volume of solution which should be prepared = 1 L

Molarity = number of moles / volume of the solution

Hence, number of moles in 1 L = 2 mol

2. Find out the mass of dry CaCl</span>₂ in 2 moles.<span>

moles = mass / molar mass

Moles of CaCl₂ = 2 mol</span><span>
Molar mass of CaCl₂ = </span><span>110.98 g/mol

Hence, mass of CaCl</span>₂ = 2 mol x <span>110.98 g/mol
                                     = 221.96 g

3. Weigh the mass accurately 

4. Then take a cleaned and dry1 L volumetric flask and place a funnel top of it. Then carefully add the salt into the volumetric flask and finally wash the funnel and watch glass with de-ionized water. That water also should be added into the volumetric flask.

5. Then add some de-ionized water into the volumetric flask and swirl well until all salt are dissolved.

<span>6. Then top up to mark of the volumetric flask carefully. 
</span>
</span>
7. As the final step prepared solution should be labelled.
4 0
2 years ago
Other questions:
  • Molly made 3600 ml of tea for a party, and she served the tea divided equally in 12 cups. how many liters of tea did molly put i
    14·2 answers
  • How does water get back into the atmosphere
    15·1 answer
  • Water has a density of 0.997 g/cm^3 at 25 degrees C; ice has a density of 0.917 g/cm^3 at -10 degrees C. (question part a) If a
    8·2 answers
  • Why is nature more influential than nurture?
    13·2 answers
  • Explain what happens when a cold air mass overtakes a warm air mass?
    7·1 answer
  • . Which of the following statements best describes the relationship between elements and compounds?
    10·1 answer
  • 7.7. A painter leans his back against a painted wall while looking into a 1m long mirror at the opposite end of a rectangular ro
    5·1 answer
  • Match each term with the appropriate definition.
    11·1 answer
  • A farmer has a bucket of fertilizer that will help her plants grow. She
    5·1 answer
  • What is the oxidation number of carbon in the compound carbon dioxide, CO2?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!