Answer: Permeable
Explanation:
The cell membrane is the outermost covering around the animal cells but it is also surrounded by the cell wall in the case of the plant cells. The cell membrane plays an important role in the cell that is it allows the entry of only certain substances like ions, molecules, atoms within the cell and only allows the exist of certain substances out of the cell. This is the selective permeability of the membrane. This process occurs through osmosis in which the desired molecules move from higher to lower concentration. Also it helps in maintaining the balance of nutrients and water within the cell. This helps in getting rid of the waste outside the cell. It provides the protection to the organelles and cytoplasm in the cell against the external injury caused by the external stressor outside the cell like water, pressure, pathogen, and others.
A solution's hydrogen ion concentration is 1 x 10-5M.
What is the pH?
Answer:
pH=5
Explanation:
-log(1 x 10-5)=5
Which type of a reaction is best represented by the equation - AB + CD → AD + BC?
Answer:
AB + CD → AD + BC
Explanation:
This is a double displacement reaction. It is also known as precipitation reaction.
What number is pointing to the area where magma is less dense due to
heat?
Answer:
I think it's 2
Explanation:
The magma gets so hot, it floats up before cooling and sinking again
A sample of hydrogen changes its pressure from 756 torr to 499 torr while the temperature remains constant. After the pressure is reduced, the volume of the gas is 789 mL. What was the original volume?
P1 = 756 torr
P2 = 499 torr
V2 = 789 mL
V1 = ?
applying Boyle's Law
P1 * V1 = P2 * V2
756 torr * V1 = 499 torr * 789 mL
V1 = 499 torr * 789 mL / 756 torr
V1 = 520.78 mL
1. This balanced equation represents a chemical reaction.
2C4H10+ 1302
8CO2 + 10H2O
What type of chemical reaction is represented by the equation?
A. Double replacement
B. Combustion
C. Single replacement
D. Synthesis (combination)
Answer:
combustion is the answer
Which of these is a behavioral adaptation?
Answer:
a brown bear hibernates and become inactive during winter
Which of the following would not produce a sound?
some pls help me
Answer:
D
Explanation:
sound waves can not be carried in space
Answer:D
Because space us silent
Oleic acid's melting point is 14°C and it's boiling point is 360°С. What phase is this substance
at room temperature 25°C?*
A. Solid
B. Liquid
C. Gas
D. Impossible to tell
C + O2 + CO2
What type of reaction occurs when carbon dioxide is formed from carbon and oxygen?
Answer:
combustion reaction.Explanation:
It is a combination reaction as carbon combines with oxygen to form carbon dioxide. It is a combustion reaction as carbon is burnt in the presence of oxygen.
Help please if link will report
Help please!!!!!!!!!!!!!!!!!!!!!!!!
What is needed for our cells to get energy from our food?
Answer:
cellular respiration is needed for our cells to get energy from our food.
Explanation:
Through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP.
How could a scientist use a sedimentary rock to provide evidence that the right k cycle is a valid scientific model
Answer:
By closely observing the sedimentary rock and the presence of organic materials and mineral grains in sedimentary rocks
Explanation:
The rock cycle explains how the three types of rock are formed over time from each other.
To use a sedimentary rock to prove that the rock cycle is a valid scientific model is by, closely observing the sedimentary rock. when the sedimentary rock is closed observed the principle of superposition will be seen ( i.e. younger segments deposited on top ), the presence of organic materials and mineral grains that can be found in Igneous or Metamorphic rocks can also be seen and this shows that Sedimentary rocks pass through the rock cycle. hence this proves that the rock cycle is a valid scientific model overtime
Need help on this question asap please
Answer:
The correct answer is - 14.
Explanation:
In the given molecular formula of the aluminum sulphite which is Al2(SO3)3, this molecular formula there different type of elements are bonded together to form this compound each element has a specific number of atoms present. This compound has three elements that are aluminum, sulfur, and oxygen and the atoms are present are:
Al = 2 atoms represented by subscript
S = 3 atoms represented as whole subscripts of sulfite
O = 9 atoms 3 inside bracket and 3 outside of bracket that multiplies.
Thus, total number of atoms are 2+3+9 = 14
Which shows substances placed in order from strongest to weakest attractive forces at room temperature?
es )
A)
1. Br (s) 2. Br (9) 3 Br (1)
B)
1. Br (s) 2. Br (1) 3 Br (9)
1. Br (9) 2. Br (1) 3 Br (s)
D)
1. Br (aq) 2. Br (1) 3 Br (9)
Dhusical Dror
Explanation:
es la b es ciertos que es el resultado
Before a child takes a bath, his mother mixes bubbles into bath water. Physical or Chemical Change?
Answer:
so i think correct answer is chemmical
3)
:NEN:
How many nonbonding electrons are on each nitrogen atom?
A)
0
B)
2
c)
4
D)
6
4)
-))
Answer:
your answer is C
Explanation:
The electron-dot structure of NH3 places one set of nonbonding electrons in the valence shell of the nitrogen atom. that means there are three bonded atoms and one single pair for a coordination number of four surrounding the nitrogen, the same occurs in water to. along with the Lewis dot structure for ammonia, NH3. the non bonding atoms are basically like hydrogen atoms the try to refuse to bond and they can't be fused unless the right conditions are met.
is the distilled water/acidic/basic/netural?
Distilled Water Has A Neutral pH, Which Means It Is Neither Acidic Nor Basic. Therefore, It's Neutral.
The chemical symbols of hydrogen, calcium and chlorine are:
H, C, Cl
H, C, Cn
H, Ca, Cl
Hn, Cal, Cl
Answer:
H, Ca, Cl is the answer dude
Answer:
hydrogen is H
calcium is Ca and chlorine is Cl
. Chalk is made of CaCO 3 . How many molecules are in 5 grams of chalk?
Answer:
20.02 grams of chalk.
Explanation:
formation of ionic bond is affected by
Answer:
Ionization energy, electronegativity, and lattice energy are the factors that influence the formation of ionic bonds of elements.
Calculate the molarity of a sugar solution if 4 liters of the solution contains 12 moles of sugar.
Answer:
3M
Explanation:
Molarity is one of the measures of the molar concentration of a solution, which can be calculated by using the formula below:
Molarity = number of moles ÷ volume
From the information given in this question, 4 liters of a solution contains 12 moles of sugar. This means that n = 12mol and V = 4L
Molarity = n/V
Molarity = 12/4
Molarity = 3
Hence, the molarity of the sugar solution is 3mol/L or 3M
When converting from grams to the must be used as a conversion factor
Gold can be pounded out to make a foil only a few atoms thick because of
A. Metallic Bonds
B. Ionic Bonds
C. Valence Bonds
D. Covalent Bonds
Answer:
A. Metallic Bonds
Explanation:
Metallic bonding is a type of chemical bonding that arises from the electrostatic attractive force between conduction electrons and positively charged metal ions.
what is the advantage of rusting
Answer:
Provide more strength
Explanation:
Rust is metal that has been oxidised . Oxides are usually more fragile and porous than their crystals metal equivalents. Some oxides, such as Aluminum oxide, are useful because they have a thin, strong shell that protects the metal from further corrosion.
pls help, what is this compound called?
Answer:
Ammonium
Explanation:
ammonium is a compound because it has 2 elements
What are the chemical reactions involved in CO2 emission?
Venus Fly trap is a great example of which type of tropism?
a
Thigmotropism
b
Gravitropism
c
Phototropism
d
Hydrotropism
Explain how to count the number of elements in a compound.
Answer:
Simply identify what elements are in a compound
Explanation:
For example in NaCl we have sodium (Na) and Chlorine (Cl)
In order to do this you would need to recognise the symbols for a certain element: O for oxygen; N for nitrogen; H for hydrogen etc.
What are the products we get out of this
reaction? (check picture)
Explanation:
two compounds because element is the very smallest part of any mixture