Answer:
missin a diagram buddy
Explanation:
4. Cell size is limited by the
(a) amount of cytoplasm.
(b) cell's ability to get rid of wastes.
(c) the size of the nucleus.
(d) the size of the plasma membrane.
Answer:
Maybe it's (a) amount of cytoplasm ...
hope its right
Bacteria and mold break down fallen leaves on the forest floor. When they do
this, they release carbon dioxide into the atmosphere and ntrogen to the
soil. Which of the following roles do bacteria and mold have in the
environment?
Answer:
H
Explanation:
not sure tho sorry if I'm wrong
Can someone please solve this?
Answer:
Indirect (B)
Explanation:
When one facter increases the other decreases.
Answer:
INDIRECT- when one factor increases, the other decreases
Consider the balanced equation below.
PC13+ Cl2 → PC15
What is the mole ratio of PCI3to PCI5?
1:1
2:1
3:5
5:3
Answer:
Mole ratio is 1:1
Explanation:
The equation is:
PCl₃ + Cl₂ → PCl₅
We see that is correctly balanced.
1 mol of PCl₃ react to 1 mol of chlorine gas in order to produce 1 mol of PCl₅
That's why, the mole ratio is, 1:1
There is not another number than 1, at stoichiometry of reaction.
What is the charge for the polyatomic ions listed?
ammonium and acetate
Answer:
-1
Explanation:
Many of the common polyatomicions have an electrical charge of.
In which direction does the electric field point a position directly south of a positive charge?
Answer: Outward
Explanation: :The direction of electric field is radially outward for a positive charge and radially inward for a negative charge. Thus, for the electric field points toward south at a position directly south of a positive charge.
What is the molarity of a 6.48 L soda that contains 5.53 moles of sugar?
Answer:
0.853 M
General Formulas and Concepts:
Acid-Base Titrations
Molarity = moles of solute / liters of solutionExplanation:
Step 1: Define
Identify variables
[Given] 6.48 L
[Given] 5.53 mol
Step 2: Solve for Molarity
Substitute in variables: M = 5.53 mol / 6.48 LDivide: M = 0.853395Step 3: Check
Follow sig fig rules and round. We are given 3 sig figs.
0.853395 M ≈ 0.853 M
The diagram below represents particles
of different elements in a crystal.
What type of bond holds these
particles together?
A. Covalent
B. Hydrogen
C. Ionic
D. Polar
Answer:
B. Hydrogen
Explanation:
The diagram represents particles of different elements in a crystal. The bond holds these particles together is hydrogen bond. Therefore, option B is correct.
What is hydrogen bond ?An intermolecular force (IMF) known as a hydrogen bond is created when an electronegative atom with a single pair of electrons and a hydrogen atom connected to a strongly electronegative atom are in proximity to another. Between molecules, there are intermolecular forces (IMFs).
When a hydrogen atom that is connected to an electronegative atom moves toward another electronegative atom nearby, powerful intermolecular forces called hydrogen bonds are produced. The hydrogen bond acceptor's electronegativity will rise, resulting in a stronger hydrogen bond.
The interaction known as hydrogen bonding, which involves a hydrogen atom sandwiched between two other atoms with a high affinity for electrons, is stronger than van der Waals forces but weaker than ionic or covalent bonds.
Thus, option B is correct.
To learn more about hydrogen bond, follow the link;
https://brainly.com/question/15099999
#SPJ2
i need help asap please :) it says to “identify the reactants.”
the options are
A: Carbon Dioxide and water
B: Glucose and oxygen
C: sunlight and chlorophyll
The reactants are A: Carbon Dioxide and water
which of the following is an alkaline earth metal?
A.Silicon (Si)
B.Aluminum (Al)
C.Carbon (C)
D.Magnesium (Mg)
Add 250.0mL to 5.00mL and round off the answer
Answer:
255mL
Explanation:
(250.0 + 5.00)mL = 255.00mL
255mL
What is the strongest force that exists between molecules of nitrogen
monoxide (NO)?
Answer:
Hydrogen Bonding (H-Bonding)
What is ppm?
A. Concentration of a solute in grams/106 grams solution
B. Concentration of a solute in mol/L solution
C. Concentration of a solute in mol/kg solvent
D. Concentration of a solute in mol/mol solution
SUBMIT
HURRY!!!!
Answer:
This is an abbreviation for "parts per million" and it also can be expressed as milligrams per liter (mg/L). This measurement is the mass of a chemical or contaminate per unit volume of water. Seeing ppm or mg/L on a lab report means the same thing.
Explain:
(a) Ethanol should be rectified after distillation.
Answer:
Ethanol (boiling point 78°C) and methanol (boiling point 65°C) are two miscible liquids. There is only a small difference in their boiling points. These two liquids are separated from their mixture by fractional ths distillation.
When vapours of the mixture pass through the fractionating column, repeated liquefaction and vapourisation take place. Subsequently, the vapours of low boiling methanol enter the condenser from the fractionating column, condense to liquid and get collected in the round bottomed flask first. Similarly, ethanol with higher boiling point can be collected later in another round bottomed flask.
Where to connect the lines? Pls answer
Answer: The given factors are matched to the effect it would have on the reaction rate are as follows.
Increase reaction rate- Crushing the antacid tablet
- Using many antacid tables
- Adding a catalyst to the water
Decrease reaction rate- Cooling the water during the reaction
No effect on reaction rate- Adding food coloring to the water
Explanation:
When antacid tablet is crushed then there will be more number of particles available for reaction. Hence, more number of collisions will take place due to which rate of reaction increases.
Using many antacid tables will also increase the number of molecules due to which there will be more collisions. Hence, more will be it's rate of reaction.
A catalyst is defined as a substance which helps in increasing the rate of a reaction without itself getting consumed in the reaction.
Therefore, adding catalyst to the water will also increase the rate of reaction.
When water is cooled during the reaction then kinetic energy between molecules decreases due to which there will be less number of collisions. Hence, rate of reaction will decrease.
Adding food coloring will have no effect on the rate of reaction as it is only changing the color of solution and does not participate in the chemical reaction.
Thus, we can conclude that given factors are matched to the effect it would have on the reaction rate are as follows.
Increase reaction rate- Crushing the antacid tablet
- Using many antacid tables
- Adding a catalyst to the water
Decrease reaction rate- Cooling the water during the reaction
No effect on reaction rate- Adding food coloring to the water
Which of the following solutions is the weakest base?
a) pH 2.3
b) pH 4.6
c) pH 6.6
d) pH 7.9
e) 12.5
Answer:
solution d with pH of 7.9
To what extent do covalent compounds conduct electricity?
always
usually
rarely
never
The answer is never because there's no electricity
Answer:
never is the correct answer
Explanation:
why couple use a method of birth control
Answer:
because it will control the birth of a child which can happen alot being overpopulated in the country or world. It also can mange their life and create a small and happy and healthy family.Also the child can get more love and support from their parents if they have less children and it wont be a taruma for the couple as well. because growing a child can be expensive time costly and really hard.
plz mark me as a brainlest a and thanks my answer
Explanation:
and btw i think the subject should be biology not chemestry
If you took a cross-section of soil from your backyard, what would be the correct order of soil layers from top to bottom? parent rock, subsoil, topsoil, humus topsoil, humus, subsoil, parent rock humus, topsoil, subsoil, parent rock, subsoil, hummus, topsoil
humus, topsoil, subsoil, parent rock
Answer:
either 1. organic, topsoil, subsoil, parent rock, bedrock or the opposite, 2. bedrock, parent rock, subsoil, topsoil, organic.
Explanation:
I study. :) Good luck!
What is the energy of a photon that emits a light of frequency 6.42 x 1014 Hz?
Answer:
Option B. 4.25×10¯¹⁹ J
Explanation:
From the question given above, the following data were obtained:
Frequency (f) = 6.42×10¹⁴ Hz
Energy (E) =?
Energy and frequency are related by the following equation:
Energy (E) = Planck's constant (h) × frequency (f)
E = hf
With the above formula, we can obtain the energy of the photon as follow:
Frequency (f) = 6.42×10¹⁴ Hz
Planck's constant (h) = 6.63×10¯³⁴ Js
Energy (E) =?
E = hf
E = 6.63×10¯³⁴ × 6.42×10¹⁴
E = 4.25×10¯¹⁹ J
Thus, the energy of the photon is 4.25×10¯¹⁹ J
Answer:
B. 4.25 x 10-19J is correct via a p e x
Explanation:
[HELP PLEASE !!} Which has a pH below 7?
a
acid
b
base
Answer: A- Acid.
Explanation: Because pH's greater than 7 are alkaline which is basic.
sodium chloride (NaCl) is an ionic compound that we consume everyday as a table salt,
what is the reason that the structure of the ionic compound causes the compound to be hard
and shiny? *
Answer:
See Explanation
Explanation:
Ionic compounds are composed of crystals. The crystal structure of an ionic compound is responsible for its hardness.
A crystalline solid contains a well organized structure which enables it to be hard and have a particular geometric shape as well defined melting point.
Hence, all the observed characteristics of NaCl are the result of its crystalline structure.
Please fill in the blanks:
We should balance out the more ___ molecules first and the ___ particles last.
Answer:
1 large
2 small
balance out means remove
ionic compounds have __ boiling points and molecular compounds have __ boiling points
a: high,low
b: low,low
c: low,high
d: high,high
Answer:
A
Explanation:
because ionic bond have stronger electrostatic force of attraction between oppositely charged particles so it has higher boiling point than molecular which is covalent bond and have low boiling point hope this helps to understand ^_^
what is used to observe things, like cells, that are too small to see with the naked eye.
Answer:
a microscope is used to see little things the naked eye can't
what is the total number of protons in carbonate, CO2/3- please help
Answer:
30 positive charged protons
Hydrogen peroxide (H2O2) decomposes into water (H2O) and oxygen gas (O2). Hydrogen peroxide is a liquid that is stored in dark-colored bottles in a cool location. Which of these is the MOST likely reason for storing hydrogen peroxide in
this way?
A. Hydrogen peroxide forms crystals when warmed.
B. Exposure to light allows bacteria to grow in hydrogen peroxide.
C. Exposure to light promotes the formation of hydrogen gas (H2) instead of oxygen gas.
D. Hydrogen peroxide breaks down quickly when exposed to light.
Answer:
D
Explanation:
the H2O2 under go reduction to remove O2 and then forms water
Hospital patients are administered oxygen from an pressurized
hyperbaric oxygen chamber. 600.0 L of oxygen is compressed in a
cylinder at 160.0 atm. What volume of oxygen can a cylinder supply at a
pressure of 3.0 atm?
Answer:
32000atm
Explanation:
Using Boyle's law equation;
P1V1 = P2V2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (
V2 = final volume (L)
According to the question below:
P1 = 160.0 atm
P2 = 3.0 atm
V1 = 600L
V2 = ?
Using P1V1 = P2V2
160 × 600 = 3 × V2
96000 = 3V2
V2 = 96000/3
V2 = 32000atm
what do the letters in the boxes of the periodic table represent
Answer:
The letters are a one- or two-letter symbol assigned to each element.
Explanation:
What is pOH? ?
A. pOH = Iog[ΟΗ]
Ο Ο Ο
Β. pH = Iog[Η]
Ο C. pH = Iog[ΟΗ]
D. pOH = [Η
(OH)
