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
myrzilka [38]
3 years ago
5

Many trials are not needed before a hypothesis can be accepted

Chemistry
1 answer:
aalyn [17]3 years ago
6 0
Your hypothesis is at the biggenning or the end of you summary
You might be interested in
A 30ml sample of a liquid has a mass of 50 grams. What is the density of the liquid?
mash [69]

Answer:

<h2>Density = 1.67 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

Density =  \frac{mass}{volume}

From the question

mass = 50 g

volume = 30 mL

Substitute the values into the above formula and solve for the density

That's

Density =  \frac{50}{30}  \\  =  \frac{5}{3}  \\  = 1.66666...

Wr have the final answer as

<h3>Density = 1.67 g/mL</h3>

Hope this helps you

5 0
3 years ago
The solubility of oxygen in lakes high in the Rocky Mountains is affected by the altitude. If the solubility of O2 from the air
IceJOKER [234]

Answer:

1.75\cdot 10^{-4} M

Explanation:

Henry's law states that the solubility of a gas is directly proportional to its partial pressure. The equation may be written as:

S = k_H p^o

Where k_H is Henry's law constant.

Our strategy will be to identify the Henry's law constant for oxygen given the initial conditions and then use it to find the solubility at different conditions.

Given initially:

S_1 = 2.67\cdot 10^{-4} M

Also, at sea level, we have an atmospheric pressure of:

p = 1.00 atm

Given mole fraction:

\chi_{O_2} = 0.209

According to Dalton's law of partial pressures, the partial pressure of oxygen is equal to the product of its mole fraction and the total pressure:

p^o = \chi_{O_2} p

Then the equation becomes:

S_1 = k_H \chi_{O_2} p

Solve for k_H:

k_H = \frac{S_1}{\chi_{O_2} p} = \frac{2.67\cdot 10^{-4} M}{0.209\cdot 1.00 atm} = 0.001278 M/atm

Now we're given that at an altitude of 12,000 ft, the atmospheric pressure is now:

p = 0.657 atm

Apply Henry's law using the constant we found:

S_2 = k_H \chi_{O_2} p = 0.001278 M/atm\cdot 0.209\cdot 0.657 atm = 1.75\cdot 10^{-4} M

8 0
3 years ago
3<br> 3) Write any 4 important of<br> 4 important of measurement <br> Science
kramer

Answer:

A measurement is the action of measuring something, or some amount of stuff. So it is important to measure certain things right, distance, time, and accuracy are all great things to measure. Measurements can also allow us to make desicions based on the outcome of the measurement

7 0
3 years ago
What is glucose? How is it formed?​
Alik [6]
Glucose is a simple sugar with the molecular formula C6H12O6. It is a carbohydrate.
6 0
2 years ago
Read 2 more answers
Transition metals can be found in Families 3 through 12 on the periodic table. What property do transition metals share?
Vedmedyk [2.9K]
The answer might be C
8 0
2 years ago
Read 2 more answers
Other questions:
  • A material that is dissolved in another material
    6·1 answer
  • How many moles are there in 1.2 x 10^2 atoms of sulfur
    14·1 answer
  • A strontium-90 atom that has lost 2 electrons has ________ protons, ________ neutrons, and ________ electrons.
    14·2 answers
  • Tap water used for drinking is considered in the DIL calculations.<br> A. True<br> B. False
    10·1 answer
  • In a pure metal, the electrons can be thought of as [ Select ] throughout the metal. Using molecular orbital theory, there [ Sel
    7·1 answer
  • What is the wavelength of a photon with a frequency of 7.81 x 1014 Hz?
    6·1 answer
  • Cuántos gramos de cloruro de magnesio se pueden obtener si se hacen reaccionar 354,9g de cloruro de titanio (IV) y 285g de magne
    5·1 answer
  • PREDICT How do you think the atoms in metal elements are different from those in
    9·1 answer
  • What has more mass 100 apples or 100 grapes? Why?
    9·2 answers
  • If the atoms that share electrons have an unequal attraction for the electrons, the bond is called
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!