How can a scientist prevent bias in a scientific investigation

Answers

Answer 1

Answer: they must make sure that all things pointed out are fact, not opinion.

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In a periodic table, dots around an elements symbol indicate the number of valence electrons in an atom ? True Or False

A 8 g object displaces 50 mL of water. What is its specific gravity?

Answers

The specific of gravity is 0.16

Hope this helps :)

Answer:

he is right it is 0.16

Explanation:

What does the . mean in Fe2O3.H2O ???

Answers

Alright so
The "Fe" is just the symbol for Iron. Due to me not knowing if it is sitting above or below the baseline, but I'll assume it's below. This means that "Fe2" means there are 2 iron atoms.

And then the O3 represents 3 oxygen atoms in the compound.

And then the H2O is just the chemical formula for water, which consists of 2 hydrogen atoms and one oxygen atom.

CAN ANYONE ANSWER THIS PLZZZ ?!?

Answers

Answer:you need to write the equation of the reactions in each question.

you need to calculate the mol for each substance which mass for which mass is given

then you do mol ratio.

I hope this shows you a hint and helps you not to depend completely on brainly.

plz put me as Brainliest

Explanation:

Can someone help , I don’t understand how to do this

Answers

Answer:

Sometimes reading it again will help. Sometimes it really is that simple. The information doesn’t all find its way

Ask questions. I will always do my best to explain things to students, but it helps if I know when they haven’t

Figure out the best time for you to learn. I mean the best time for you to study on your own. Are you a night owl

Take good notes. I’m not going to tell you how to take good notes – it’s different for everyone.

Explanation:

Magnesium and bromine cation and anion

Answers

Answer:

Mg²⁺ cation

Br⁻ anion

Explanation:

Magnesium is present in group two of periodic table.

It is alkaline earth metal.

It has two valance electrons.

Thus by losing two valance electrons it complete the octet. The common oxidation state of magnesium is +2.

The bromine is present in group seventeen.

It has seven valance electrons.

It is the member of halogen family.

To complete the octet bromine required one electron. By gaining the one electron it showed -1 oxidation state.

When bromine combine with magnesium both formed MgBr₂.

The one atom of Mg have +2 oxidation state while bromine have -1 that's why to make the overall compound neutral two bromine atoms combine with one atom of magnesium.

Trejo reacts 5.0 moles of hydrochloric acid (HCI) with 1.5 moles of barium hydroxide (Ba(OH)2). Which reagent is the limiting reagent and which is in excess?

Answers

the balanced equation for the above reaction is as follows
Ba(OH)₂ + 2HCl ----> BaCl₂ + 2H₂O
stoichiometry of Ba(OH)₂ to HCl is 1:2
number of Ba(OH)₂ moles - 1.5 mol
number of HCl moles - 5.0 mol
limiting reactant is fully consumed during the reaction and amount of product formed depends on amount of limiting reactant present
excess reactant only a fraction of the amount present is used up in the reaction
if Ba(OH)₂ is the limiting reactant
if 1 mol of Ba(OH)₂ reacts with 2 mol of HCl
then 1.5 mol of Ba(OH)₂ reacts with 2 x 1.5 = 3.0 mol of HCl
but 5.0 mol of HCl is present and only 3.0 mol is required
therefore excess reagent is HCl and limiting reactant is Ba(OH)₂

Other Questions

Use 'organic matter' in a sentence (Does not have to be complex)

The failure to regulate the pH of the blood can affect the activity ofenzymes that clot bloodred blood cells that make antibodieschlorophyll that carries oxygen in the bloodDNA that control starch digestion in the blood

What is number 1 and 2

Please help with the last problem!