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
Leya [2.2K]
2 years ago
14

el diametro de la tierra en el ecuador es de 7926381 ml. redondee este numero a tres cifras significativas y expresel en notcion

exponencial estandar.
Chemistry
1 answer:
elena55 [62]2 years ago
7 0

7.93 x 10⁶mi

Explanation:

Significant figures are numbers that shows how accurate and precise scientific measurements are reported.

Here are some rules to identifying them;

  • All non-zero digits are significant
  • zeros between digits are significant
  • leading zero before a decimal are not significant
  • trailing zero after a decimal are significant
  • trailing zero before a decimal point are significant.

The number 7926381  has 7 significant numbers.

To write in the scientific notation, we simply express as N x 10ᵃ

   N is the number of significant number

   a is the exponent

N here is 7.93

a here is 6

            7.93 x 10⁶mi

learn more:

Significant figures brainly.com/question/2746374

#learnwithBrainly

You might be interested in
Do all multicellular organisms follow the same pattern of organization?
natta225 [31]
So so sorry if i'm wrong but i'm pretty sure no
3 0
3 years ago
One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silv
Flauer [41]

Answer:

1.1 × 10⁻⁴ M

Explanation:

Let's consider the following double displacement reaction.

CuCl₂(aq) + 2 AgNO₃(aq) → 2 AgCl(s)+ Cu(NO₃)₂(aq)

We can establish the following relations:

  • The molar mass of AgCl is 143.32 g/mol.
  • The molar ratio of AgCl to CuCl₂ is 2:1

The moles of CuCl₂ that reacted to produce 7.7 mg of AgCl are:

7.7 \times 10^{-3} gAgCl.\frac{1molAgCl}{143.32gAgCl} .\frac{1molCuCl_{2}}{2molAgCl} =2.7 \times 10^{-5}molCuCl_{2}

The molarity of CuCl₂ is:

M=\frac{2.7 \times 10^{-5}molCuCl_{2}}{0.250L} =1.1\times 10^{-4} M

7 0
2 years ago
Solve pls brainliest
inna [77]

Answer:

Explanation:

The two green substances are not the same.  Most of their properties are different, except some are alike.  Since not all of their properties are matching, they are not the same substance.

I am not sure if this is what you were looking for, but if it is then I am happy to help.  

7 0
2 years ago
Water's ability to dissolve a wide variety of molecules is important, but more important is the hydrophobic effect, which drives
Sliva [168]

Answer:

d. Hydrophobic molecules are attracted to each other.

Explanation:

The term “hydrophobic effect” is associated with the spontaneous tendency of macromolecules, such as proteins, to prefer a conformation in an aqueous medium, with hydrophobic groups facing the interior of the mac romolecule, favoring attractive intramolecular interactions, and hydrophilic groups exposed on the surface, for maximize interactions with water molecules in the medium. This is because the hydrophobic molecules are attracted to each other, allowing them to turn inward.

8 0
3 years ago
The body also loses heat by the evaporation of sweat. How is a tea kettle boiling similar to the evaporation of sweat from the b
egoroff_w [7]
In both cases, water is being left out of a “container” due to heat
5 0
2 years ago
Read 2 more answers
Other questions:
  • What is the correct chemical name for the molecular compound if6?
    5·1 answer
  • Jill is studying the temperature output of an ammonium chloride hand warmer with a calorimeter. What change should she expect to
    10·1 answer
  • Which element has the highest standard reduction potential? fluorine hydrogen lead lithium
    6·2 answers
  • A scientific theory is different than the way we use the word theory in common speech. Which of these is likely to be true about
    12·2 answers
  • Which mass is easily forgotten about when trying to prove the law of conservation of mass in a chemical reaction.
    15·2 answers
  • Help me please <br> Look at the picture linked
    7·1 answer
  • Both artists and scientists contribute to our understanding of the world around us. Identify the ways that
    11·2 answers
  • Calculate the specific heat in calories per °C of a 2.00 lb pure iron bar.<br> Plz help me!!!
    6·1 answer
  • What is the temperature and pressure at STP?
    5·1 answer
  • To make 395 mL of a 0.630 M solution of HCI, how many mL of a 2.4 M solution should<br> be used?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!