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
gulaghasi [49]
3 years ago
12

(scientific investigations) help please.

Chemistry
1 answer:
Novosadov [1.4K]3 years ago
8 0

I agree with what you've chosen for question two and three.

I would choose C for the fourth question and argue that you shall also go with C for question five.

One of the main ideas about repetition is to have multiple <em>Trials</em>- or independent experiments-<em> </em>for a single independent variable using identical experimental setup. The table presented in option C is the only one among the four choices that allots spaces for measurements from multiple independent experiments.

Hypotheses are predictions of the outcome of a particular experiment. A hypothesis is <em>correct</em> only if it accurately describes the outcome of an experiment. The <em>hypothesis</em>, not the data, would have to be revised if the two doesn't fit. The researcher could keep developing and testing new hypotheses until arriving at a correct one.

Additionally, I would prefer option B over option D in the first question- responses to that question can depends on what your teacher says about the validity of different sources, given that <em>neither </em><em>B</em><em> nor </em><em>D</em><em> </em> are reliable as sources that one would like to cite in a paper.

You might be interested in
What STARTING element undergoes alpha decay to yield uranium-234 (U) as a PRODUCT?
nadezda [96]
Uranium-238 is the element that undergoes decay to yield uranium-234
3 0
3 years ago
A diatomic molecule shares three pairs of electrons. What type of bond is present in the molecule? A single covalent bond becaus
VMariaS [17]
<h3><u>Answer</u>;</h3>

A triple covalent bond because each atom requires three more electrons to complete its octet.

<h3><u>Explanation</u>;</h3>
  • A triple covalent bond is a covalent bond formed by atoms that share three pairs of electrons.
  • For example;<em><u> in a diatomic molecule such a nitrogen; A nitrogen atom has five valence electrons, which can be shown as one pair and three single electrons. </u></em>When combining with another nitrogen atom to form a diatomic molecule, the three single electrons on each atom combine to form three shared pairs of electrons.
3 0
3 years ago
Read 2 more answers
The pKa of formic acid is 3.75. At pH of 5.00, _______ .
AlladinOne [14]

The pKa of formic acid is 3.75. At pH of 5.00, b) [formate] > [formic acid].

Formic acid is a weak acid. Thus, together with its conjugate base (formate) they form a buffer system. We can calculate the pH of a buffer system using Henderson-Hasselbach's equation.

pH = pKa + log \frac{[formate]}{[formic\ acid]} \\\\5.00 = 3.75 + log \frac{[formate]}{[formic\ acid]}\\\\\frac{[formate]}{[formic\ acid]}  = 17.8

As expected, at a pH above the pKa, the concentration of formate is higher than that of the formic acid.

The pKa of formic acid is 3.75. At pH of 5.00, b) [formate] > [formic acid].

Learn more: brainly.com/question/22821585

5 0
3 years ago
Both cholesterol and oleic acid are lipids. What property do they have in common?
OLga [1]
Cholesterol and oleic acid are non-polar (hydrophobic) compounds, soluble in organic solvents. Most membrane lipids are amphipathic, having a non-polar end and a polar end. Oleic acid and other fatty acids are hydrophobic (not soluble in water).

Please mark as brainliest if it helps
8 0
3 years ago
during a 2 hour trip,a family is able to travel 140 kilometers. what is the average speed of the family during this portion of t
TiliK225 [7]

The average speed of the family : 70 km/h

<h3>Further explanation</h3>

Given

time = 2 hour

distance = 140 km

Required

The average speed

Solution

Distance is the length traveled by an object within a certain time  

Average speed = total distance/total amount of time

Can be formulated :

 Avg speed = d : t

Total distance traveled : 140 km

Total time : 2 hr

Avg speed = 140 : 2 = 70 km/h

5 0
3 years ago
Other questions:
  • The atomic symbol Superscript 206 subscript 82 upper P b. represents lead-206 (Pb-206), an isotope that has 82 protons and 124 n
    6·2 answers
  • How many microliters are in 0.68 liters? 
    10·1 answer
  • Opal is a hydrated form of silica. If a laboratory analysis of a sample of opal reveals it to contain29.2% Si, 33.3%O, and 37.5%
    11·1 answer
  • The Lucas test has _______ results based on the type of alcohol present because the reaction involves a _________, which is ____
    7·1 answer
  • When an element exist in nature by itself, it must have a charge of
    11·1 answer
  • What is the molarity of a solution made from 325.4g of Aluminum chloride with enough water te
    13·1 answer
  • (7th grade science question)
    14·1 answer
  • _Al + _Fe(NO3)2 --&gt;_Fe + __Al(NO3)3
    7·1 answer
  • -Question 2 please help me! -ASAP-
    9·1 answer
  • Alan wants to identify an unknown solid compound. Which statement correctly describes a method he could use to identify the comp
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!