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Your Answer is Here:
I made a hypothesis, observed my experiments, used a procedure, had and prepared materials that are needed, evidence that support my thesis, and made a conclusion.
Hopefully, this helps!
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1. The electronegativities of the period-3 elements are listed on the transparency. Calculate the
electronegativity differences for the following pairs of bonded period-3 atoms.
a. Na and Cl
d. Si and C1
b. Mg and s
e. Si and S
c. Al and P
The roots of a plant help to anchor the plant to soil, and are also used for food storage and water extraction. Roots are made up of tissues, such as xylem, Phloem, and pith. In which level of organization would the roots of a plant most likely be classified?
Answer;
Cells, Organism.
Explanation:
Roots are made up of tissues, such as xylem, phloem, and pith. In which level of organization would the roots of a plant most likely be classified as?
Which of the following equations is NOT balanced?A MgCO3→MgO + CO2 B NaCl + KI →NaI + KCl C Na + O2 →Na2O D Ca + MgSO4→CaSO4+ Mg
Answer: C
Na + O2 →Na2O
Explanation:
A
MgCO3→MgO + CO2 balanced
B
NaCl + KI →NaI + KCl balanced
C
Na + O2 →Na2O not balanced the balanced would be 4Na + O2 →2Na2O
D
Ca + MgSO4→CaSO4+ Mg balanced
Which of the following molecules is most likely an enzyme?
water
glucose
protease
monosaccharide
Answer:
protease is an enzyme
Explanation:
It hydrolyse peptide bonds of proteins and also called proteolytic enzymes.
e the given conversion factors below to convert between mass and number of representative par
plecules, and ions)
oblem: How many molecules of methane (CHA) if there are 9.65 gram of methane ?
Answer:
3.63 x 10²³molecules
Explanation:
Given parameters:
Mass of methane = 9.65g
Unknown:
Number of molecules = ?
Solution:
To solve this problem first, we find the number of moles of the given compound or molecule first.
The given molecule is methane;
CH₄;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of CH₄ = 12 + 4(1) = 16g/mol
Number of moles = [tex]\frac{9.65}{16}[/tex] = 0.603moles
So;
From mole concept;
1 mole of a substance contains 6.02 x 10²³ molecules
0.603moles of methane will contain 0.603 x 6.02 x 10²³
= 3.63 x 10²³molecules
Please help me 30 pointsss dont guess please be sure
Answer:
Acid
Explanation:
;)
What do the letters ESM stand for?
Answer:
European stability mechanism
E. What is one way that your body knows if it is upside-down or not?
Answer:
You get some type of pressure that you start to feel in your muscles and joints from gravity and movement. How do they say it? Something called "seat-of-the-pants" (something like that). You get some type of pressure, and your body senses it, and it knows when you are upside-down or not, because if you're not, then you won't get any pressure in your muscle.
Hope this helped!
Have a supercalifragilisticexpialidocious day!
Imagine being barefoot outside on a hot summer's day in a sunny place ,would
you rather be standing on concrete or grass? Why?
Answer:
Grass
Explanation:
On a hot summers day, while barefoot Concrete normaly has heat absorbed into it. (Or on top) So when you go to Walk on it, It normally burns the heel.
Hope I helped and Have a great day!
brainliest?
Answer:
grass
Explanation:
the concrete has a higher specific heat capacity and is basically hotter than the grass which has a lower one
I KNOW THE ANS JUST NEED AN EXPLANATION...PLEASE I WILL Mark you the brainiest
When you break an iron magnet into two pieces, you get ____.
two north poles
two south poles
two north poles and two south poles
a piece of iron that is no longer magnetic
Answer:
two north poles and two south poles
Explanation:
A single magnet has a north pole and a south pole. If it is broken into two pieces, then each of the two pieces will have a north pole and a south pole.
No matter how many times or into how many pieces a magnet is broken, the resulting pieces will have two poles each.
Answer:
Each piece will still have a north pole and a south pole.
Explanation:
"No matter what phase water
is in, the water molecules
stay the same; they just move
differently."
1: explain why this evidence matters
Answer:
Yes, water molecules remain the same despite the phase
Explanation:
When water is in the form of ice, it molecules remain the same only the distance between the molecule. This distance is higher than that of the inter molecular distance between liquid water molecules. Due to this reason ice is lighter than water.
Now in gaseous phase, the intermolecular distance increases thereby making it lighter than solid ice and liquid water.
Marble chips react with dilute hydrochloric acid to produce carbon dioxide gas. The rate of this reaction can be changed by changing the size of marble chips.
Describe experiments to investigate what effect using smaller marble chips has on the rate of this reaction.
Answer:
See explanation
Explanation:
We know that surface area is an important determinant factor in the study of reaction rate. This is the reason why finely divided marble chips react faster than lumps of marble in the reaction between marble chips and dilute HCl.
Now imagine that i have a lump of marble and i have finely divided marble. Then i also have a solution of 0.5 M dilute HCl. If i introduce 1g of the lump of marble into 250 ml solution of the 0.5 M HCl in one beaker and introduce 1g of finely divided marble into another 250 ml solution of 0.5 M HCl in a separate beaker, we will notice that the finely divided marble chips reacts faster as evidenced by the quicker effervescence of CO2 gas from the later compared to the former.
Hence, smaller marble chips reacts faster with dilute HCl than a lump of marble.
Answer:
yes the above given answer is absolutely correct I agree with u man on the above.
List three accessory organs in the digestive system.
what is the molecular polarity of the following lewis structure
what is the chemical formula of Fire
Answer:
The heat of the flame will keep remaining fuel at ignition temperature. The flame ignites gases being emitted, and the fire spreads. As long as there is enough fuel and oxygen, the fire keeps burning. Fuel + oxygen (from the air) = combustion products (mainly CO2 + H2O) + heat
Explanation:
Answer:
Chemical formula of fire is burning or combustion of air (particularly oxygen).
Explanation:
Please Brainliest
It has been an expense for the Australian government (taxpayers) to try to control the rabbit population
Question 4 options:
True
False
Answer:
true
Explanation:
It has been an expense for the Australian government (taxpayers) to try to control the rabbit population. This statement is true.
Why did the rabbit population grow so quickly in Australia?Aside from the lack of natural predators on the continent, their success is aided by rapid reproduction: They can have more than four litters a year, each with up to five kits (baby rabbits).
The European wild rabbit has become an invasive pest in the southern two-thirds of Australia. They have an impact on natural environments, primary production, as well as townships and infrastructure.
The government turned to biocontrol in the 1950s. They released rabbits infected with myxoma, a virus that only affects rabbits, into southeastern Australia.
Thus, It has been an expense for the Australian government (taxpayers) to try to control the rabbit population. This statement is true.
To learn more about the rabbit population, follow the link;
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PLEASE HURRY !!!!!!!!!!!
Which of the following describes how the San Andreas Fault formed on Earth at a transformed boundary?
Plates moved in closer
Plates moved away from each other
Plates slid past each other
Plates moved with each other in the same direction
Answer: At convergent boundaries, plates move toward each other. They can push together and cause mountain ranges to form. At other times, one plate gets pushed down beneath the other plate. ... At divergent boundaries, plates move apart from each other.
Explanation:
I whould personally go with plates moved in closer
2Na + 2H2O = 2NaOH + H2.
how many moles of H2, could be made from 27.6g H2O?
Answer:
A)27.6g H2O x (1 mole H2O/ 18.02g H2O) x (1 mole H2/ 2mole H2O)
= 0.766 mol H2 x 6.022 x 10^23
= 4.61 x10^23 molecules
B)12.9g H2O x (1 mole H2O/ 18.02g H2O) x (2 mole Na / 2mole H2O)
=0.716 mol Na x 6.022x 10^23
= 4.31 x 10^23 atoms
Explanation:
I hope it's help
Is MgF2 polar or no polar covalent?
Answer:
ionic
Explanation:
In this instance, fluorine is a non-metal while magnesium is a metal. Ionic bonds are always formed when a metal and a non-metal are combined. Therefore, magnesium fluoride is an ionic compound, and an ionic compound's inter-ion force is always an electrostatic force.
The molecule's ionic bond is exceedingly powerful. When a molecule dissolves in water, it releases a significant amount of ions into the mixture. For the same reason, it conducts electricity as well. This explains why magnesium fluoride is naturally polar.
One type of binary ionic compound is magnesium fluoride. It consists of one magnesium atom and two fluorine atoms. In comparison to fluorine, magnesium is a metal with a substantially lower electronegativity.
To know more about ionic compounds, visit;
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The mass of the nails and copper sulfate solution used in this investigation was 250g The mass of the copper and tran sulfate solution produced in this
nvestigation would be
250g
Answer:
He it would because 250g is the answer is to 256g
Explanation:
3.1 Copper is a transition
metal. Which part of the
modern Periodic Table is
copper placed in? (1 mark)
Explanation:
Transition metals occupy the d block of the periodic table. Their location is right between the group 2A and 3A. Copper (Cu) is in the first row of the d-block elements. The image attached illustrates the position of the transition metals relative to other elements in the periodic table.
Write any four properties of water.
Answer:
it is in liquid state.
it shapes as the object is .
it can change into gas state by heating .
it has on colour.
One problem with fuel-cell cars is that
gas is not readily available in
pure form.
Answer here
Answer: Hydrogen.
Explanation: One problem with fuel-cell cars is that hydrogen gas is not readily available in pure form. Fuel cell vehicles use hydrogen gas to power an electric motor. Unlike conventional vehicles which run on gasoline or diesel, fuel cell cars and trucks combine hydrogen and oxygen to produce electricity, which runs a motor. Hope this helps ^-^.
Answer:
Hydrogen.
Explanation:
how many total atoms are in v2o5
Answer:
7 atoms
Explanation:
When a compound such as X2Z4 is created, what would be the
correct simplified chemical formula?
Answer:
XZ2
Explanation:
There are different ways in which compounds can be represented. Broadly, we have three different types of formula;
- Structural formular: This shows how th atoms in te compound are connected to each other.
- Molecular formular: This shows the actual number of atoms of element present in the compound
- Empirical Formular: This is the simplest formular of a compound. It basically shows the number of atoms in simple ration to each other.
This question requires us to input the empirical formular;
X2Z4
The ratio of the elements is; 2 : 4 which can be simplified into 1 : 2
This means the empirical formular is XZ2
why do water bodies evaporate.
Plss I need help
Answer:
the heat from the sun makes the water molecules move faster and faster, until they move so fast they escape as a gas.
Explanation:
please tell me if I'm wrong
How does dormancy most likely help a plant survive?
A.It helps a plant grow taller.
B.It helps a plant absorb sunlight.
C.It helps a plant conserve energy.
D.It helps a plant camouflage itself.
Answer:
C. It helps a plant conserve energy.
Explanation:
Dormancy is a time in a plants life that it stops all physical growth, therefore conserving energy.
Hope this helps.
A small bubble rises from the bottom of a lake, where the temperature and pressure are 8°C and 6.4 atm, to the water's surface, where the temperature is 25°C and pressure is 1.0 atm. Calculate the final volume (in ml) of the bubble if its initial volume was 2.1 ml.
a. 0.070 ml
b. 21 ml
c. 14 ml
d. 42 ml
Answer:
b
Explanation:
How many atoms are present in 2.30 moles of Carbon?
3.82 x 10-24 atoms -a
3.82 x 1023 atoms-b
1.38 x 1024 atoms-c
6.02 x 1023 atoms-d