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
zhuklara [117]
3 years ago
7

Scientists think the earth is approximately how old?

Chemistry
2 answers:
tiny-mole [99]3 years ago
6 0

I think the answer is approximately 4.12 billion years since the amount of years is 4.543 billion years

AlexFokin [52]3 years ago
4 0

Answer:

Option C. 4.12 Billion years. Hope this helps!!

You might be interested in
For which of the following aqueous solutions would one expect to have the largest van’t Hoff factor (i)? a. 0.050 m NaCl b. 0.50
ira [324]

Answer:

The van't hoff factor of 0.500m K₂SO₄ will be highest.

Explanation:

Van't Hoff factor was introduced for better understanding of colligative property of a solution.

By definition it is the ratio of actual number of particles or ions or associated molecules formed when a solute is dissolved to the number of particles expected from the mass dissolved.

a) For NaCl the van't Hoff factor is 2

b) For K₂SO₄ the van't Hoff factor is 3 [it will dissociate to give three ions one sulfate ion and two potassium ions]

Out of 0.500m and 0.050m K₂SO₄, the van't hoff factor of 0.500m K₂SO₄ will be more.

c) The van't Hoff factor for glucose is one as it is a non electrolyte and will not dissociate.

7 0
3 years ago
A large Ka favors the _____.
SVETLANKA909090 [29]
The first one, "Production of hydronium ions."
6 0
2 years ago
Read 2 more answers
When monovalent cation (X) binds to divalent anion (Y) it will form
Romashka-Z-Leto [24]

When a monovalent cation X binds to a divalent anion Y, a compound with the formula X_2Y would be formed.

A monovalent cation is an atom that has lost an electron. Hence, such cation has a single positive charge. A monovalent cation X will, thus, be X^+

A divalent anion is an atom that has gained two electrons. Such anion has 2 negative charge. Thus, divalent Y would be Y^2^-

Since Y is a divalent anion, it requires 2 electrons in order to successfully bind with another charged atom, a cation to be specific. Thus, two of  X^+ would be required to successfully bind  Y^2^-

   Y^2^- + X^+ + X^+ ----> X_2Y

More on the chemical formula can be found here: brainly.com/question/16741890

8 0
2 years ago
An alkane used as a lubricant contains 25 carbon atoms. How many hydrogen atoms are present in its structure?
nadya68 [22]

Answer:

52

Explanation:

Alkanes are saturated hydrocarbons, that is, they are formed just by carbon and hydrogen atoms bonded through single covalent bonds. The general formula for alkanes is CnH2n+2.

If n = 25 (25 carbon  atoms), 2n + 2 = 2 × 25 + 2 = 52. There are 52 hydrogen atoms in the structure and the alkane has the formula C₂₅H₅₂.

5 0
2 years ago
A 16.9 gram sample of KCl is used to mak a 250 mL KCl solution. What is the molarity of the KCl solution?
Genrish500 [490]

Answer:

0.906 gm/l

Explanation:

We know that molarity of the a solution is given by,

M= \frac{w}{m} \times \frac{1000}{v}, where 'M' is the molarity, 'w' is the weight of the sample, 'm' is the molar mass, and 'v' is the volume of the solution.

Molarity of a solution tells us the concentration of the solute in the solvent.

Molar mass of KCl is = 74.55

Putting the values we get,

M = \frac{16.9}{74.55} \times \frac{1000}{250}=0.906 gm/l

So the molarity of KCl solution is 0.906 gm/l.

5 0
2 years ago
Read 2 more answers
Other questions:
  • Sirius, the brightest star, is 8.8 light-years from Earth. That means
    10·1 answer
  • To titrate 45.00 milliliters of an unknown HCl sample, use 25.00 milliliters of a standard 0.2000 M NaOH titrant. What is the mo
    12·1 answer
  • Webb had calculated the percent composition of a compound. How can he check his results
    11·1 answer
  • A cylinder with a moving piston expands from an initial volume of 0.350 L against an external pressure of 1.90 atm. The expansio
    13·1 answer
  • You are measuring the density of an irregularly shaped object. Using the analytical balance you determine the mass of your objec
    10·1 answer
  • Explain why the dissolved component does not settle out of a solution
    7·1 answer
  • Based on its position on the periodic table, which of the following properties should beryllium (Be) have?
    6·2 answers
  • The information below describes a redox reaction.
    10·1 answer
  • Pls help me. Show proof on why it’s that answer.
    13·1 answer
  • What effect will doubling the initial concentration of crystal violet have on the rate
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!