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
Rudik [331]
3 years ago
7

9. i like really really really need help plz don't waste my time , thx

Chemistry
2 answers:
erastova [34]3 years ago
8 0

us very simple

Explanation:

2Mg+2O→4MgO

grigory [225]3 years ago
4 0
2Mg+2O ➡️4MgO.........
You might be interested in
Chem help<br>calculate the wavelength of an electromagnetic wave with a frequency of (in pic)​
olchik [2.2K]

we have,

wavelenght=c/f

where c= 3×10^8 m/s

f=6.3×10^12 s^-1

so wavelength=(3×10^8)/(6.3×10^12)

=0.476×10^-4 m

4 0
3 years ago
1.) Which of the following is an example of using creativity while doing background research?
adoni [48]

1) Answer is: D. Writing a hypothesis.

The scientific method is a process for experimentation that is used to explore observations.

Steps of the scientific method:

1) ask a question about something that is observed.

2) do background research.

3) construct a hypothesis, an attempt to answer questions with an explanation that can be tested.

4) test of hypothesis.

5) analyze collected data and draw a conclusion.

2) Answer is: A. Carbon and oxygen are chemically bonded in it.

A compound (in this example carbon dioxide CO₂) is a pure substance because its molecule cannot be broken down into simpler particles by physical means.

A chemical compound is a chemical substance composed of many identical molecules composed of atoms held together by chemical bonds.

Carbon dioxide (CO₂) are inorganic compounds with covalent bonds between carbon and oxygen.

3) Answer is: B. Components that are mixed can be in different states of matter.

A single substance can be used to make a mixture if the substance is composed of more than one element is not correct, because mixture is composed of at least two substances. For example mixture of water and alcohol ethanol.

There is a definite recipe to make each mixture, so the composition of a mixture is set is not correct, because composition of mixture can vary.

Components that are mixed can be in different states of matter is correct, for example mixture of salt (solid) and water (liquid).

8 0
3 years ago
Ammonia and sulfuric acid react to form ammonium sulfate. Determine the starting mass of each reactant if 20.3 g of ammonium sul
strojnjashka [21]
Hope you are able to see

8 0
3 years ago
Please Help! Asap! :)
yaroslaw [1]

I need details to solve for you

3 0
3 years ago
Read 2 more answers
What is the charge of a magnesium ion?
kupik [55]

2+ charge electrons of course


7 0
3 years ago
Read 2 more answers
Other questions:
  • a square boat made from iron has overall dimensions of 2.00 cm x 11.0 cm x 11.0 cm. it has a mass of 213 g. what is its density
    8·2 answers
  • Which has the greater mass? 1 l copper or 1 l silver?
    15·1 answer
  • What are protons explained simply
    7·2 answers
  • Calculate the root means square velocity of nitrogen molecules in 25 degrees Celsius
    11·1 answer
  • What’s the difference between the three scales used to measure seismic waves
    10·1 answer
  • 45) 2 AgNO 3 (aq) + K 2 CrO 4 (aq) -&gt; Ag 2 CrO 4 (s) + 2 KNO 3 (aq) How many grams of silver chromate will precipitate when 1
    8·1 answer
  • Calculate the standard heat of reaction for the following methane-generating reaction of methanogenic bacteria: 4CH3NH2(g) + 2H2
    14·1 answer
  • Anne completely fills the fuel tank of her car with a mixture of gasoline and ethanol, C2H5OH. When filled, the fuel tank contai
    8·1 answer
  • How much energy does it take to melt 2 kg of ice? (Refer to table of<br> constants for water.)
    8·2 answers
  • Figure 2 shows what happens to the electrons in the outer shells when a sodium atom reacts with a fluorine atom.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!