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
Tasya [4]
3 years ago
14

When naming covalent compound both the first and second element in the fomula always receive

Chemistry
1 answer:
Len [333]3 years ago
8 0

Answer:

Yes.

Explanation:

Yes,  both the first and second element in the formula of covalent compound always receive  a prefix to represent the number of each element present in the formula in order to show the percentage or proportion of each element in the formula of covalent compound. Prefix refers to  addition of word, letter, or number at the beginning of something so here number placed in front of element indicates the prefix.

You might be interested in
How many HCL-molecules in 1,5mol HCL
Vera_Pavlovna [14]

Answer:

number of molecules =9.03×10^23

Explanation:

use the equation

n=number of molecules /Av.constant

make number of Molecules become the subject of the formula by multplying Av.constant on both sides of the equation,

number of molecules=n×Av. constant ,where Av.constant is 6.02×10^23

number of molecules=1.5mol×6.02×10^23

=9.03×10^23

3 0
3 years ago
The teal line of the hydrogen emission spectrum has a wavelength of 486.0 nm. A hydrogen emission spectrum has a violet, a blue,
Sloan [31]

Answer:

The correct answer to the following question will be "4.08 × 10⁻¹⁹ Joule".

Explanation:

Given:

Wavelength, λ = 486.0 nm

As we know,

E=h\upsilon =\frac{hc}{\lambda}

On putting the estimated values, we get

⇒          =\frac{1241.5 \ ev\ nm}{486 \ nm}

⇒          =2.554 \ ev

∴ 1 ev = 1.6 × 10⁻¹⁹ J

Now,

Energy, E=2.554\times 1.6\times 10^{-19}

⇒               =4.08\times 10^{-19} Joule

7 0
3 years ago
Match the following items. Match the items in the left column to the items in the right column. 1. general or nonspecific observ
ivann1987 [24]
when column B is like the attached pic: (missing in your question)

so the matches will be like that:

1- Qualitative :

as Qualitative is a general or nonspecific observation, they also don't require

measurements and even can't be measured, that is because of the reality is

being approximated only. It  describes qualities and uses opinion

2- Hypothesis : 

as a hypothesis is an educated guess quantitative, and it is a prediction stated

in " If and then " form. a hypothesis to be valid need a research such as:

-Encyclopedia & state and local research facilities & scientific journals.

3- Direct relationship:

as a Direct relationship is when two variable change in the same direction,

and one remaining larger than the other by the same factory.  

- this is a type of a relationship in which there is a change with one variable, and corresponding with the change in the other. and because this corresponding change with the other variable in the same direction so it refers to a positive relationship. 

4- Quantitative:

as Quantitative is a measured observation, It's an information or data based

on quantities obtained. And using numbers, equipment and standard units.

5- Control :

as control is standard, reference data or experiment qualitatively. this is what

you compare your experimental results to. This is for comparing results, it

used as a standard for comparison and use baseline measurements to use in

the comparing.

6- Theory :

 as Theory is a presently accepted explanation of how something happened.

 Scientifically acceptable general principles to explain phenomena. It the

general or abstract principles of the science. for example the  wave theory of

light.

7- Law :

as a law is a statement that explains what something does under the same

conditions. when we take about law in science, it is a general rule to explain

the observations in the form of a mathematical statement. Scientific law may 

be stated in words or expressed as a mathematical equations.

8- Best fit curve:

as best fit curve is a curve drawn to average the data's deviations direct

relationship. It is a process of constructing a curve that has best fit to a

series of data points. 

7 0
3 years ago
true or false, Discovering which of two materials can scratch the other is a way to compare the hardness of the materials
Shkiper50 [21]
True, the hardness of all materials in relative <span />
7 0
3 years ago
Read 2 more answers
Which element has the greatest number of valence electrons available for bonding?
IrinaVladis [17]
Which element has the greatest number of valence electrons available for bonding? Chlorine
7 0
4 years ago
Other questions:
  • Consider this equilibrium: COCl2(g) CO(g) + Cl2(g) Keq = 8.1 x 10-4. What is true for this system?
    8·1 answer
  • Help please!!!! I dont understand how to tell if it is single replacement or double replacement.
    10·1 answer
  • 1). The Kinetic Molecular Theory 5 points
    5·1 answer
  • Many gardeners add earthworms to their soil if none are already living there. Why would gardeners do this?
    13·1 answer
  • When mechanical energy is transformed,
    10·1 answer
  • Use the periodic table from the lesson to answer the following question.
    14·1 answer
  • Which generates waves that are capable of traveling through a vacuum?
    6·1 answer
  • Antacids relif hyperacidity. why? plz help me!!!!​
    12·1 answer
  • One of the forms of asexual reproduction is the most common in algae
    9·1 answer
  • which of the following does not describe a metal? question 7 options: good conductor of heat good conductor of electricity tends
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!