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
Olin [163]
3 years ago
6

NEED HELP! An experiment _____. must always be done in a laboratory is best done if only one variable is tested for at a time ca

n be done only by direct observation must always be done in the field
Chemistry
1 answer:
hichkok12 [17]3 years ago
6 0

Answer:

Chemically

in chemistry

You might be interested in
Draw the major byproduct of the reaction (not the minor species discussed in q2b). At which stage did you remove it from your sa
givi [52]

You need to do something like that your self so sorry can help.

3 0
3 years ago
How much water, in grams, can be made from 1.03 x <img src="https://tex.z-dn.net/?f=10%5E%7B24%7D" id="TexFormula1" title="10^{2
krok68 [10]

Answer:

30.8 g of water are produced

Explanation:

First of all we need the equation for the production of water:

2H₂ + O₂ → 2H₂O

2 moles of hydrogen react with 1 mol of oxygen in order to produce 2 moles of water.

As we assume, the oxygen in excess, we determine the moles of H₂.

1.03ₓ10²⁴ molecules . 1 mol/ 6.02ₓ10²³ molecules = 1.71 moles

Ratio is 2:2, so 1.71 moles will produce 1.71 moles of water

Let's convert the moles to mass: 1.71 mol . 18g / 1mol = 30.8 g of water are produced

5 0
3 years ago
What is the maximum number of electrons in the following energy level? n = 2
Dmitry_Shevchenko [17]
<span>What is the maximum number of electrons in the following energy level? n = 2

2

</span>
3 0
3 years ago
Which statement describes heterogeneous mixtures?
Artemon [7]
<span>The righ answer is the option A. They are made up of two or more pure substances that are not chemically bonded. A classicall expample ot heterogeneous mixtures are sugar and salt. Sugar is a pure substance, salt is also a pure substance, when you mixe them you form mixture where salt is still salt and sugar is still sugar, that is what "they are not chemically bonded" means. So you can separate them by physical media. </span>
4 0
3 years ago
Read 2 more answers
How is organic chemistry and biochemistry related?
arsen [322]

Answer:

Organic chemistry is the branch of chemistry in which we study the covalent compounds of carbon and hydrogen and their derivatives

And biochemistry we also study the chemical reaction takes place in the bodies of organism

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following choices represents hydrogen peroxide
    9·2 answers
  • A gaseous mixture of o2 and n2 contains 35.8 % nitrogen by mass. what is the partial pressure of oxygen in the mixture if the to
    6·1 answer
  • Which of the following is FALSE about the atomic models and subatomic particles?
    15·1 answer
  • When 21.45 g of KNO3 was dissolved in water in a calorimeter, the temperature fell from 25.00°C to 14.14 °C. If the heat capacit
    7·1 answer
  • After standardizing a NaOH solution, you use it to titrate an HCl solution known to have a concentration of 0.203 M. You perform
    10·1 answer
  • 2. Identify the limiting reactant when 4.68 g of iron reacts with 2.88 g of sulfur to produce Fes.
    13·1 answer
  • How many mL (to the nearest mL) of 0.140-M KF solution should be added to 400. mL of 0.212-M HF to prepare a pH
    14·1 answer
  • Animals need various nutrients in order to live and grow. Nitrogen, for example, is a nutrient that is needed to form molecules
    7·1 answer
  • How many grams of hcl would be produced if 54 grams of water were used
    5·2 answers
  • Mass of 4.50 moles of oxygen gas. Answer with 3 significant digits
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!