# Scientists write down every detail of an experiment. A. so they can do the experiment many times and compare the results. B. because they don't take any pictures. C. because they always need to change their hypothesis. D. so they can leave the experiment alone to run itself.

Answer:  A good procedure is so detailed and complete that it lets someone else duplicate your experiment exactly! Repeating a science experiment is an important step to verify that your results are consistent and not just an accident.

## Related Questions

For which of the following processes would there decrease in entropy? A. melting ice B. separation of a compound C. boiling water D. freezing water

For the answer to the question above, entropy is basically a measure of how organized or disorganized energy is in a system of atoms/molecules.
Melting ice, decomposing a compound and boiling water all cause a greater dispersal of energy, and so for them, entropy is increasing.
I hope this helps
The answer is D. freezing water.

The atomic mass of an atom do not contain electrons because...?

Electrons are usually depicted in drawings as much smaller than protons or neutrons because their mass is so much smaller. In fact, electron mass is so small that it isnot counted in an atom's mass.
hope this helps

How did mendel use his training in mathematics to aid his experiments in life science?

Mendel use his training in mathematics to aid his experiments in life science by using it for the offspring sexual reproduction. He mainly studied pea plants because they had distinguished characteristics and they were quick to grow. Mendel would create hybrids from the plants.

He was the first scientist to use probability to explain heredity.

Explanation:

The mass of one mole of carbon dioxide is _ g. A) 28.01
B) 44.01
C) 384.4
D) 32.00
E) none of the above

B

Explanation:

mass of one mole of carbon dioxide is 44.01g

The mass of each WtWt isotope is measured relative to C−12C−12 and tabulated below. Use the mass of C−12C−12 to convert each of the masses to amuamu and calculate the atomic mass of WtWt.?

The question is incomplete , the complete question is;

The mass of each Wt isotope is measured relative to C-12 and tabulated below. Use the mass of C-12 to convert each of the masses to amu and calculate the atomic mass of Wt.

Wt-296  =  24.6622

The atomic mass of Wt-296 is 195.9464 amu.

Explanation:

1 amu is defined as 1 by twelfth of the carbon-12 mass.

Mass of an isotope Wt-296 = 24.6622

Mass of an isotope Wt-296 in amu = M

The atomic mass of Wt-296 is 195.9464 amu.

Which of the following statements about protons are true? SELECT ALL THAT APPLY

1 Protons have the same magnitude of charge as electrons but are opposite in sign.
2Most atoms have more protons than electrons.
3 Protons have twice the mass of neutrons.
4Protons have a charge of 1+.

4 protons , 3 protons , 2  protons

how many moles of an ideal gas would occupy a 25.0 liter container when the temperature is 295 K and the pressure is 0.850 atm?

Required number of moles of ideal gas is 0.877 moles.

Explanation:

Pressure (P) = 0.850 atm

Temperature (T) = 295 K

Volume (V) = 25 ltr

Universal gas constant (R) = 0.0821

no of moles (n) = ?

we have the ideal gas equation as:

PV= nRT

or, 0.850× 25 = n × 0.0821 × 295

or, n = 0.877 moles

Hence the required number of moles of an ideal gas is 0.877 moles.

What type of mixture scatters light and cannot be filtered

Colloid is a type of mixture that scatters light and cannot be filtered. Colloids are heterogeneous mixtures with a particle size between that of the solutions and that of the suspensions: the size of the particles of a colloid is bigger than the molecules or ions of a solution and smaller than the particles of a suspension. Due to the small size of the particles in the colloids, the diluted colloids seem homogeneous, but those particles are big enough to produce the Tyndall effect, which is the dispersion of the light. Solutions do not show Tyndall effect.

Calculate the vapor pressure (in torr) at 298 k in a solution prepared by dissolving 15.3 g of the non-volatile non-electrolye urea {co(nh2)2} in 107 g of water. the vapor pressure of water at 298 k is 23.76 torr. enter your answer to 2 decimal places