Answer:
I found on internet may be it helps
Explanation:
Here, we provide a general review of recent studies into the genetic basis of human brain evolution. The insights gleaned from these studies can be broadly divided into three categories: (i) positive selection on protein-coding regions of the genome that lead to changes in the sequences of existing proteins; (ii) duplication and deletion of genes; and (iii) evolutionary changes in non-coding regions of the genome, especially those in cis-regulatory sequences that lead to altered gene expression .
What types of substances are considered drugs?
Answer:
Marijuana
Opiates
Opioids
Explanation:
A 390 mL solutions of 4.6 M HCl is left out over the weekend and 74 mL of solvent evaporates. What is the new concentration of HCl?
Answer:
5.7 M
Explanation:
You have .390 L of 4.6 M HCl.
.390 L * 4.6 mol/L = 1.794 mol HCl
.390-.074=.316 L solvent remaining
1.794 mol/.316 L=5.7 M HCl
Where does a wolf get energy from?
Where does a rabbit get energy from?
Where does a plant get energy from?
Where does a mushroom get energy from?
Answer:
Check Explanation
Explanation:
In this case the Mushroom would get energy from decomposing dead plants and animals in the soil/ground
The plant would get energy from the sun (simplified)
the rabbit would get energy from eating the plant
in this case the wolf would energy from eating the rabbit but in a normal setting the wolf could get energy from eating any animal
Answer:
Explanation: A wolf gets its energy from food and water
A rabbit gets its energy from food and water too
A plant get it energy from sunlight, rain
A mushroom also get its energy from dead plant/animal’s
If this wasn’t the answer you wanted I’m sorry
Acid, Base, or Saft?
USE THE ARRHENIUS DEFINITION TO CLASSIFY IF THE SUBSTANCE IS AN ACID, BASE, OR SALT
» MgF2
» H2SO4
Answer:
MgF2 - Salt
H2SO4 - Acid
Explanation:
Arrhenius Definition
Arrhenius acid is a substance that dissociates in water to form hydroxide (H+) ions.
Arrhenius base is a substance that dissociates in water to form hydroxide (OH–) ions.
H+
OH-
S2-
O2-
MgF2 - Salt as no Hydrogen
H2SO4 - Acid as converts to HSO4- and H+ upon dissociation in water.
When electrons are filling energy levels, the lowest energy sublevels are
occupied first. This is
A. None of these
B. The Aufbau principle
C. Hund's rule
D. Conservation of energy
Reset Selection
Which functional group defines a ketone?
−NH
−PO4
−Na
=O
The functional group that defines a ketone is =O and the correct option is option 4.
What are Ketones?
Ketones are a common functional group in organic chemistry. Ketones have important physiological properties. As a result, they are a part of several sugars and compounds involved in medicinal use such as cortisone, an anti-inflammatory.
In ketones, the carbonyl group has 2 hydrocarbon groups attached to it. These can be either the ones containing benzene rings or alkyl groups. Ketone does not have a hydrogen atom attached to the carbonyl group.
Therefore, the functional group that defines a ketone is =O and the correct option is option 4.
Learn more about Ketones, here:
https://brainly.com/question/4439718
#SPJ3
Which statement best describes what the density
of an object represents?
Density is the mass of an object per unit of
length.
Density is the volume of an object of a
certain mass.
Density is the length of an object for a certain
mass.
Density is the amount of matter in a certain
volume.
Answer:
d
Explanation:
edg2020
PLEASE HELP WILL GIVE 100 points
Record the data from each trial in the data chart below. Be sure to fill in the chart completely.
Test One
Parent 1: FF
Parent 2: FF
Phenotype ratio:
short fur: long fur
Test Two
Parent 1: Ff
Parent 2: FF
Phenotype ratio:
short fur: long fur
Test Three
Parent l: ff
Parent 2: ff
Phenotype ratio:
short fur: long fur
Answer: Test One
Parent 1: FF
Parent 2: FF
Phenotype ratio:
short fur: long fur
Test Two
Parent 1: Ff
Parent 2: FF
Phenotype ratio:
short fur: long fur
Test Three
Parent l: ff
Parent 2: ff
Phenotype ratio:
short fur: long fur
Explanation:
The picture represents _________________.
A . Compounds
B . Mixture of Elements and Compounds
C. Mixture of Elements
D. Elements
E. Mixture of Compounds
The three most common phases of matter are
Answer:
Solid, Liquid, and Gas
Explanation:
There are constantly these three phases of matter around us every day. The water you drink is a liquid, the chair you sit on is a solid, and the air you breathe is a gas.
A bobsled has a momentum of 4000 0 kg* m/s to the south. Friction on the track reduces its momentum to 500 kg* m/s to the south. What impulse is applied to the bobsled by the friction?
A. 6500 kg* m/s north
OB. 1500 kg* m/s south O
C. 6500 kg* m/s south
O 1500 kg* m/s north
Answer: 1500 kg•m/s north
Explanation:
A PE X
An electron na hydrogen atom moves from level to level 4 The electron then drops from level 4 to level 2. Which statement
bese most likely test
The energy absorbed in the first move equals the energy released in the second move
The energy absorbed in the first move is greater than the energy released in the second move
The energy released in the first move equals the energy absorbed in the second move
The energy released in the first move is greater than the energy absorbed in the second move
Answer:
The energy absorbed in the first move is greater than the energy released in the second move.
Explanation:
The greater the level number the greater the energy.
A movement up a level requires energy so energy id absorbed.
Dropping down a level releases energy.
One million argon atoms is how many mol of argon atoms? (2 significant figures)
Answer:
1.66 * 10^-18 mol of Argon
Explanation:
Avogadro says 1 mol of anything has 6.022* 10^23 atoms/particles. Thus using this principle, 1 million argon atoms will have
[tex]1,000,000 atoms Argon * \frac{1mol Argon}{6.022*10^{23} atoms }[/tex]
[tex]1.66*10^{-18} mol \\\\ of Argon[/tex]
One million argon atoms is equivalent to 1.7 × 10⁻¹⁸ moles of argon atoms.
To convert one million (10⁶) argon atoms to moles of argon atoms, we will use Avogadro's number: there are 6.02 × 10²³ argon atoms in 1 mole of argon atoms.
[tex]10^{6} atom \times \frac{1 mol}{6.02 \times 10^{23}atom } = 1.7 \times 10^{-18} mol[/tex]
One million argon atoms is equivalent to 1.7 × 10⁻¹⁸ moles of argon atoms.
You can learn more about Avogadro's number here: https://brainly.com/question/13302703
Which ion below is present in greatest concentration in a basic (alkaline) solution
Answer:
hydroxide ion / OH-
Explanation:
Basic solutions have a greater concentration of hydroxide ions than hydrogen (H+) ions
CH3CH2CHCH2 + HCl in iupac
Answer:
But-1-ene and Hydrochloric acid
Explanation:
CH3CH2CHCH2
H H H
H - C- C - C = C
H H H
C - Carbon
H - Hydrogen
But-1-ene
H - Cl
H - Hydrogen = 1+ = Hard Acid
Cl - Chlorine = 1- = Hard Base
Hydrochloric acid
1.
A car tire was inflated to 75 kPa at the repair shop where the
temperature is 15 °C. What is the pressure of the tire on the trip home
if the temperature of the road surface is 32 °C? (Write your answer
nearest whole number)
kPa
Answer:
THE PRESSURE OF THE TIRE ON THE TRIP HOME AT THE ROAD SURFACE TEMPERATURE OF 32°C IS 160 kPa.
Explanation:
Initial Pressure = 75 kPa
Initial temperature = 15 °C
Final temperature = 32 °C
Final pressure = unknown
Using the combined equation of gases;
P1V1/T1 = P2V2/ T2
Since the tire will have the same volume of air in it showing that volume of constant both at the repair shop and on the road surface.
The relationship between pressure and temperature is used with constant volume.
P1/T1 = P2/ T2
75 kPa / 15 °C = P2 / 32 °C
P2 = 75 kPa * 32 °C / 15 °C
P2 = 2400 kPa °C / 15 °C
P2 = 160 kPa.
So therefore, the pressure of the tire on the trip home when the temperature of the road surface is 32°C is 160 kPa.
A compound contains 57.2 percent carbon, 6.1 percent hydrogen, 9.5 percent nitrogen, and 27.2 percent oxygen. What the empirical formula of the compound?
Answer:
So the empirical formula is C14H18N2O5
Explanation:
C = 57.2% = 12g/mol
H = 6.1% = 1g/mol
N = 9.5% = 14g/mol
O = 27.2% = 16g/mol
Empirical Formula for compound hmm
Assume
C = 57.2g
H = 6.1g
N = 9.5g
O = 27.2g
So we have
C = 57.2g/12g = 4.76 moles
H = 6.1g/1g = 6.10 moles
N = 9.5g/14g = 0.68 moles
O = 27.2g/16g = 1.70 moles
Divide each mole value by the smallest number of moles calculated. Round to the nearest whole number.
C = 4.76 moles / 0.68 moles = 7
H = 6.10 moles / 0.68 moles = 9
N = 0.68 moles / 0.68 moles = 1
O = 1.70 moles / 0.68 moles = 2.5
Ok so we now have the ratios but for O it's 2.5, have to be whole numbers so we will need to double all the numbers.
C = 14
H = 18
N = 2
O = 5
So the empirical formula is C14H18N2O5
which of the following is a basic salt solution?
A. NH3 (aq)
B. NH4I (aq)
C. KNO3 (aq)
D. Na2CO3 (aq)
Answer:
D. Na2CO3
Explanation:
I'm just guessing tbh
Rice has a bulk density of 0.9 g/mL, but an individual grain of rice has a
density of 1.1 g/mL. Water has a density of 1.0 g/mL. What would happen to
a cup of rice when poured into a pot of water?
Answer:
Individual grain of rice will sink.
Explanation:
Given:
Rice bulk density = 0.9 g/ml,
Individual grain of rice density = 1.1 g/ml
Water density = 1.0 g/ml
Find:
What happens with a cup of rice when poured into water =?
Explanation:
Each piece of grains of rice will sink into the water because individual grains of rice has a higher density than water.
PLZ HELP QUICKLY!!!!!!!!
Portfolio: Reflection
Review everything from your portfolio thoughtfully. Answer the following questions carefully and specifically. Use your answers as a guide to prepare for your presentation. Your presentation will focus on your goals and your development and improvements this semester. As you answer these questions, evaluate your strengths as a student. Consider how your growth this semester has prepared you for advancement. Use complete sentences or a paragraph to respond to each item.
WHAT DOES THIS QUESTION MEAN: When you look through your portfolio, what improvements do you notice in your work?
What do they mean by WORK?
Answer:
they meen like what youve learned or like what youve been tonight....all that is work stuff you did for example school work.
Name three group l bases and three group ll bases
Answer:
Group 1: LiOH, NaOH, KOH
Group 2: Ca(OH)2, Sr(OH)2, Ba(OH)2
Explanation:
What’s the answer to this question?
Answer:
“The answer to this question” is more general. The preposition to denotes assignment - that the answer is being “applied” to the question, whether the answer is right or wrong. Conceptually, that makes a lot more sense than the previous one. This is also the more common usage.
What is the primary difference between a hypothesis and a theory?
Answer: A hypothesis is an explanation for observations. A theory is an explanation for what has been shown many times.
Explanation:
a student is asked to draw an atom of sulfur on a board. the pictures below represents what the student drew. what is wrong with this sulfur atom
plzzzz help i need to finish up
How are molecules and ionic compounds
the same?
What determines how much kinetic energy an object has?
A.Mass and speed/velocity
B.only speed
C.Only mass
D.Height and mass
Determine the power of 900 joules of work done in 4 seconds
A) 3600 W
B) 225 W
C) 904 W
D) 450 W
Answer:
B. 225 W
Explanation:
Power is the measure of the amount of work done in a certain time frame. It can be found using the following formula.
p=w/t
where w is the amount of work done in joules and t is the amount of time in seconds.
We know that 900 joules of work was done in 4 seconds.
w=900 J
t= 4 s
Substitute these values into the formula.
p=900 J/ 4 s
Divide 900 by 4
900/4=225
p= 225 J/s
1 Joules of work per second (J/s) is equal to 1 Watt (W). Therefore, we can substitute Watts for Joules per second.
p= 225 Watts
The power is 225 Watts, and the correct answer is B.
Neutralization Reactions
PREDICT THE PRODUCTS OF THE FOLLOWING REACTIONS
+
HNO3+ Ba(OH)2
+
H3PO4 + Ca(OH)2
→
Answer:
2HNO3+ Ba(OH)2 = Ba(NO3)2 + 2H2O
H3PO4 + Ca(OH)2 = Ca3(PO4)2 + 6H2O
Explanation:
2HNO3+ Ba(OH)2 = Ba(NO3)2 + 2H2O
H3PO4 + Ca(OH)2 = Ca3(PO4)2 + 6H2O
H+
O2-
OH-
Ba2+
Ca2+
NO3-
P 5+, 3+, 3-
H2O
What is the shape of the H2S molecule?
bent
pyramidal
linear
trigonal planar
Answer:
The answer is bent
Answer:
The molecule is bent
Explanation:
What is amplitude in chemisty
Answer:
CHEMISTRY GLOSSARY
Amplitude is the displacement of a wave from zero. The maximum amplitude for a wave is the height of a peak or the depth of a trough, relative to the zero displacement line
