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
4vir4ik [10]
3 years ago
8

What is used to find true north on a compass? a. equator c. magnetic declination b. prime meridian d. cardinal directions Please

select the best answer from the choices provided A B C D
Chemistry
2 answers:
Flauer [41]3 years ago
6 0

Answer:

The correct answer is Magnetic Declination

Explanation:

This is the angle on the horizontal plane that is in the middle of north and geographic north. A compass point in the direction of the magnetic north inteasd of the true north. If the truth north is wanted to be read, then a change is gonna happen adding the magnetic declination to reading to get to the true north.  

uysha [10]3 years ago
4 0

the answer is C magnetic declination


You might be interested in
Why do we use the mole concept ??
Kaylis [27]

Answer:

Here

Explanation:

Chemists need the mole concept to bridge the gap between the microscopic world of atoms to the macroscopic world of humans. As you know, the molecular level consists of particles that are invisible to us.

7 0
2 years ago
Read 2 more answers
Aluminum metal and manganese (IV) oxide react to produce aluminum oxide and manganese metal. What mass of manganese (IV) oxide r
gayaneshka [121]

Answer: 1.77 kg of manganese (IV) oxide reacts to produce 1.12kg of manganese metal.

Explanation:

The balanced chemical equation is:

4Al+3MnO_2\rightarrow 2Al_2O_3+3Mn

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

moles of manganese = \frac{1.12\times 1000g}{55g/mol}=20.4mol

According to stoichiometry :

3 moles of Mn is produced by = 3 moles of MnO_2

Thus 20.4 moles of Mn is produced by =\frac{3}{3}\times 20.4=20.4moles  of MnO_2

Mass of MnO_2=moles\times {\text {Molar mass}}=20.4moles\times 86.9g/mol=1773g=1.773kg    (1kg=1000g)

Thus 1.77 kg of manganese (IV) oxide reacts to produce 1.12kg of manganese metal.

6 0
3 years ago
1. Which of the following best describes the relationship
Ipatiy [6.2K]
D there is one kind of cell of which all living things are made
8 0
3 years ago
Human activities, like burning fossil fuels and deforestation, have greatly contributed to global warming. In this discussion as
Travka [436]

Answer

Africa

Explanation:

Burning fossil fuels and deforestation is disturbingly heightened in Africa with almost no viable measure taking to control it's effect. No effective programs are presently in place to control excessive tree falling used for herbs, firewood, charcoal business and a whole lot. Below standard carbon rating PMS are in high circulation with fumes, carbon monoxide is full abundance in the atmosphere. Presently, all these unchecked activities have resulted into unexplainable excessive increase in temperatures, breeding neck twisting diseases, severe skin infections, dehydration and increase diabetes. Drought has eaten up landlocked cities in Nigeria and Central Africa. Infact farmers have lost count of the usual natural cycle of rainfall and the beginning of each farming season due to this essential evil of climate change

4 0
3 years ago
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. Show the for
Alexus [3.1K]

Answer:

See explanation below

Explanation:

In this case, let's see both molecules per separate:

In the case of SeO₂ the central atom would be the Se. The Se has oxidation states of 2+, and 4+. In this molecule it's working with the 4+, while oxygen is working with the 2- state. Now, how do we know that Se is working with that state?, simply, let's do an equation for it. We know that this molecule has a formal charge of 0, so:

Se = x

O = -2

x + (-2)*2 = 0

x - 4 = 0

x = +4.

Therefore, Selenium is working with +4 state, the only way to bond this molecule is with a covalent bond, and in the case of the oxygen will be with double bond. See picture below.

In the case of CO₂ happens something similar. Carbon is working with +4 state, so in order to stabilize the charges, it has to be bonded with double bonds with both oxygens. The picture below shows.

5 0
3 years ago
Other questions:
  • Which of the following is the correctly balanced chemical equation for the reaction Ca(OH)2 and HNO3
    10·2 answers
  • As you sit on a dock, you notice a wave crest pass. You count another 10
    8·1 answer
  • What is the valence electron configuration of the group 2a elements?
    7·1 answer
  • Why has JET not been able to get fusion reactions to work?
    13·1 answer
  • Boron occurs naturally as two isotopes. What is the difference between these isotopes?
    10·2 answers
  • Consider this reaction:
    11·1 answer
  • What block does sodium belong to? s-block p-block d-block or f-block
    9·2 answers
  • Which is the correct electron configuration for the element nitrogen
    8·1 answer
  • a 150 j of energy is added to a system that does 50 j of work is done.by how m uch will tyhe internal energy of system be raised
    12·1 answer
  • Calculate the gravitional force in between two object of mass 25kg and 20kg if distance between them is 5m?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!