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
lapo4ka [179]
4 years ago
9

Is the world really going to end Saturday

Chemistry
1 answer:
lana66690 [7]4 years ago
8 0
Nope, this was confirmed by NASA senior space scientist David Morrison to be a hoax.
There's no such thing as Planet X / Nibiru.
There is no brown dwarf planet on a crash course with Eath.
You might be interested in
9) What is the density of the gold rock with a mass of 386 grams and has a volume of 20 cubic centimeters?
miss Akunina [59]

Answer:

density= mass/volume

hence density of gold rock

= 386/20

=19.3 g/cc

3 0
3 years ago
Which image shows a foliated metamorphic rock?
Sonbull [250]

Answer:

dark coloured rock with coarse grains in parallel layers

Explanation:

8 0
3 years ago
Read 2 more answers
Why is it that in Group 1 elements become more reactive as we go down the group but in Group 7 elements become less reactive as
wariber [46]

Answer:

Group 1 elements become more reactive as we move down the group. These atoms are larger because they have more shells. ... The force of attraction between the nucleus and the electron is less than for smaller atoms, and the outer electron is lost more easily.

5 0
3 years ago
Hotosynthesis can be represented by 6CO2(g)+6H2O(l)⇌C6H12O6(s)+6O2(g) Which of the following will be false when the photosynthes
antoniya [11.8K]

Answer: Option (b) and (d) are correct.

Explanation:

An equilibrium reaction is defined as the reaction in which rate of forward reaction equals rate of backward reaction.

A photosynthesis reaction is the reaction in which plants in the presence of sunlight, water, and carbon dioxide make their own food.  

  • The amount of carbon dioxide consumed will be equal to the rate of formation of oxygen into the atmosphere.

Hence, the statement rate of formation of O_{2} is equal to the rate of formation of CO_{2} is true.

  • Concentration of oxygen may remain constant but it will not decrease. Hence, the statement concentration of O_{2} will begin decreasing, is false.
  • As both oxygen and carbon dioxide are present in an equilibrium reaction, So, their concentration will not change.

        Hence, the statement concentrations of CO_{2} and O_{2} will not change, is true.

  • Concentration of carbon dioxide and oxygen will also depend on the limiting reagent. So, it is not necessary that the concentrations of CO_{2} and O_{2} will be equal.

Some amount of carbon dioxide might escape out into the air.

Hence, the statement concentrations of CO_{2} and O_{2} will be equal, is false.

3 0
4 years ago
For the reaction:
vekshin1

Answer:

0-77.3kj/mol

Explanation:

add all of the mole

3 0
3 years ago
Other questions:
  • What experimental evidence can you provide that the product isolated is 1-bromobutane?
    14·2 answers
  • As the concentration of hydrogen ions in solution increases, what happens to the pH?
    7·2 answers
  • What did Rutherford discover that Thomson did not understand?
    8·1 answer
  • The two naturally occuring isotopes of antimony are 121Sb (57.21%) and 123Sb (42.79%), with isotopic masses of 120.904 and 122.9
    13·1 answer
  • Type the correct answer in the box. Express your answer to two significant figures.
    15·1 answer
  • What is one chemical reaction that begins with petroleum as a starting material
    5·1 answer
  • Milk of magnesia helps to neutralize stomach acid because it is a
    6·2 answers
  • Classify the following compound as an alkane, alkene, or alkyne.
    9·1 answer
  • Bacteria in the human mouth release enzymes to break up sucrose, and then polymerize glucose to form a bacterial plaque. When th
    7·1 answer
  • Why is nucleus of an atom charged is negatively charged?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!