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
vlada-n [284]
3 years ago
10

The scientific notation 2 x 10-2 has what value? 0.02 0.002 0.2 0.0002

Chemistry
2 answers:
Vikki [24]3 years ago
8 0

Answer : The correct option is, 0.02

Explanation :

The scientific notation is a way of the representation of the very small or very large number.

The given scientific notation is, 2\times 10^{-2}

That means,

2\times 10^{-2}=\frac{2}{100}=0.02

Hence, the scientific notation of 2\times 10^{-2} has 0.02 value.

Marta_Voda [28]3 years ago
7 0
Since the exponent is negative, you move the decimal (2.0) to the left two spots leaving you with .02
You might be interested in
Consider a balloon that has a volume V. It contains n moles of gas, it has an internal pressure of P, and its temperature is T.
Dmitry [639]
B.) it stays the same
6 0
3 years ago
Read 2 more answers
Compute the boiling point of this solution:
ryzh [129]

Answer:

The boiling point of the solution is 101,42ºC

Explanation:

Formula for boiling point elevation is:

ΔT = Kb · molality . i

Water boils at 100ºC, at 1 atm.

NiSO4 ----> Ni2+  +  SO4-2  (assume 100% ionization, the value of i, is 2)

Tº boiling point solution - Tº boiling point = Ebulloscopic constant . molality . Van't Hoff factor.

Tº bp solution - 100ºC = 0,512 ºC/molal . molality . 2

Molality means moles of solute in 1kg of solvent (1000g)

Molar mass NiSO4 = 154,75 g/m

Mass/ Molar mass = Moles --> 21,6 g / 154,75 g/m = 0,139 moles

These moles are in 100 g of H2O, so we have to make a rule of three to find, the moles in 1000g

100 g _________0,139 moles

1000 g _______ 1,39 moles (molality)

Tº bp solution - 100ºC = 0,512 ºC/molal . 1,39molal . 2

Tº bp solution = (0,512 ºC/molal . 1,39molal . 2) + 100ºC

Tº bp solution = 101,42ºC

4 0
3 years ago
50 POINTS
Luba_88 [7]
The answer is D. easier, higher
5 0
3 years ago
Read 2 more answers
A new grill has a mass of 30.0 kg. you put 1.5 kg of charcoal in the grill. you burn all the charcoal and the grill has a mass o
atroni [7]

The reaction for burning of charcoal or complete combustion is as follows:

C(s)+O_{2}(g)\rightarrow CO_{2}(g)

From the above balanced reaction, 1 mole of carbon releases 1 mole of CO_{2} gas.

Converting mass of charcoal into moles as follows:

n=\frac{m}{M}

Molar mass of pure carbon is 12 g/mol thus,

n=\frac{1.5\times 10^{3} g}{12 g/mol}=125mol

The same moles of CO_{2} is released. Converting these moles into mass as follows:

m=n×M

Molar mass of CO_{2} is 44 g/mol thus,

m=125mol\times 44 g/mol=5.5\times 10^{3}g

Converting mass into kg,

1g=10^{-3}kg

Thus, total mass of gas released is 5.5 kg.

7 0
3 years ago
Which statement is true about BF3, a nonpolar molecule? It has nonpolar bonds and a symmetrical structure. It has nonpolar bonds
konstantin123 [22]
I think the correct answer is the first option. It has nonpolar bonds and a symmetrical structure. The structure of a BF3 molecule shows a symmetrical trigonal geometry. The net dipole moment of the molecule is zero therefore it is polar.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Is NaF an acid, base or salt?
    8·2 answers
  • In bohr's atomic theory when electron moves from one energy level to another energy level closer to the nucleus:
    13·1 answer
  • Is the color In each pen the result of single dye or multiple dyes
    11·1 answer
  • Suppose that 1.06 g of rubbing alcohol (C3H8O) evaporates from a 72.0 g aluminum block. If the aluminum block is initially at 25
    6·1 answer
  • How many moles of HCl are needed to react with 0.87 mol Al?
    8·1 answer
  • PLZ HELP ME WITH MY WORK​
    5·1 answer
  • The daily dose for aspirin recommended by doctors is 81 mg/ day to reduce heart disease. a) In a week how many milligrams are ad
    6·1 answer
  • Which words help you to determine the meaning of the word declerate in paragraph 3 ?
    7·1 answer
  • If you compare the mass of a
    9·1 answer
  • 3c reaction time =138.5 sec reation rate=
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!