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
arsen [322]
2 years ago
9

20 points to whoever can answer these 3 questions correctly

Chemistry
1 answer:
vazorg [7]2 years ago
5 0

Answer:

1.true

2.2

3. false

Explanation:

.........

You might be interested in
what would be the effect on the properties of the water molecule if oxygen and hydrogen had equal electronegativity?
ohaa [14]

Answer:

It would no longer be a polar molecule with a slightly positive and slightly negative ends. It then would not be able to dissolve ionic salts or polarized organic compounds such as sugar.

Explanation:

7 0
3 years ago
The genetic material of all organisms;made up of two twisted strands in a double helix
viva [34]
Hello!

The genetic material of all organisms which is made up of two twisted strands in a double helix is called DNA (DeoxyriboNucleic Acid)

DNA 
is the basis of all genetic information. It contains all instructions for the development and functioning of all living organisms and some viruses. The main function of DNA is the long-term storage of information to build other cell components like Proteins and RNA. It is composed of two strands with 4 possible bases which are Adenine (A), Thymine (T), Cytosine (C) and Guanine (G).

Have a nice day!
7 0
3 years ago
An Argon laser gives off pulses of green light (wavelength = 514 nm). If a single pulse from the laser has a total energy of 10.
svetoff [14.1K]

Answer:

n=2.59\times 10^{16} photons

Explanation:

E=n\times \frac{h\times c}{\lambda}

Where,  

n is the number of photons

h is Plank's constant having value 6.626\times 10^{-34}\ Js

c is the speed of light having value 3\times 10^8\ m/s

\lambda is the wavelength of the light

Given that, wavelength = 514 nm = 514\times 10^{-9}\ m

Energy = 10.0 mJ = 0.01 J ( 1 mJ = 0.001 J )

Applying the values as:-

0.01=n\times \frac{6.626\times 10^{-34}\times 3\times 10^8}{514\times 10^{-9}}

\frac{19.878n}{10^{17}\times \:514}=0.01

n=2.59\times 10^{16} photons

7 0
3 years ago
I need an example of a chemical change involving water.Pleaseeee.
slava [35]
Chemical change occur when two substances are combined and produces a new substance or decomposes into two or more substances which are entirely different from the original two substances.

There are three types of chemical changes. These are 1) Inorganic Changes, 2) Organic Changes, and 3) Biochemical Changes


Here are some examples of chemicsal changes.

If you combine Sodium and Water, chemical changes causes decomposition into Sodium Hydroxide and Hydrogen.

Sodium + Water  ==>  Sodium Hydroxide and Hydrogen

Na + H2O ====>  NaOH and H

Another example of chemical change is:

Carbon Dioxide and Water will decompose into Sugar and Oxygen

Carbon Dioxide + Water ==> Sugar and Oxygen

CO2 + H2O ==> CnH2nOn (where n is between 3 and 7) and O

 
7 0
3 years ago
What is orbital theory of bonding in metals
lianna [129]
Metals of Group 1 donate 1 electron from its ns orbital to form ionic bond, where n is the no. of its outermost shell. 
Metals of Group 2<span> donate 2 electrons from its ns orbital to form ionic bond, where n is the no. </span>of its <span>outermost shell. </span>
5 0
3 years ago
Other questions:
  • How many grams of chromium (Cr) are present in 4.20 moles of the metal?
    8·1 answer
  • The combustion reaction of propane is described by the reaction. C3H8 + 5O2 ? 4H2O + 3CO2. How many moles of O2 are required to
    8·1 answer
  • Which arrow represents the change of state described
    10·1 answer
  • Pepper is trying to determine the density of her gold ring. The ring’s mass is 100 grams and the volume displaced by the ring is
    14·1 answer
  • Which is an example of making a quantitative observation?
    15·2 answers
  • According to the text, which amino acid(s) contains a side chain..
    14·2 answers
  • Carrots and beets are roots. They are sweet due to sugar. How is this an adaptation for the plant's survival?
    10·2 answers
  • Which correctly lists two characteristics of crystal faces that define crystal systems?
    11·2 answers
  • Tomas takes a walk next to the ocean and finds a jellyfish that has washed ashore. Curious, he does some research about
    5·1 answer
  • How has the U.S. Census Bureau changed the way it records information about relationships?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!