Answer:
whick level are u on
I am not faking an answer but I cann arrange it to u if possible
two types of fine chemical
Answer:
Flavors and fragrances
Substances that have a pH
7 are considered acidic.
Answer:
False because pH value below 7 are considered acidic.
Answer:
Any solution that has a pH of less than 7 is considered acidic, and anything above a pH of 7 is basic .
Explanation:
Is 1 mole of Na equal or not equal to Avogadro's number?
Answer:
nooooo it is not equal to it
PLEASE HELP !
(In the column for the other reactants and/or products indicate whether they increase, decrease, or stay the same.)
Chemical Reaction:
A (g) + B (g) ←→ 3C (g)
Blue ← → Clear, Colorless
WHAT ARE THE:
Stress , Equilibrium Shift (right or left) , A (g) , B (g) , C (g) , What color?
1. Add A
2. Add B
3. Add C
4. Remove A
5. Remove C
Answer:
See Explanation
Explanation:
We must remember that when a constraint such as a change in concentration, pressure or temperature is imposed on a reaction system in equilibrium, the equilibrium position will shift in such as way as to cancel the constraint.
If more of A or more of B is added to the system, the equilibrium position will shift towards the right and the solution becomes clear and colorless.
If C is added to the system, the equilibrium position will shift towards the left and the solution colour turns blue.
If A is removed from the system, the equilibrium position is shifted towards the left and the solution once again turns blue.
If C is removed from the system, the equilibrium shifts towards the right and the solution turns clear and colorless
if 5.0g zinc reacts with 10.0 g hci to produce h2 gas and znci2 according to the following equation zn=2hci znci2 + h2 what is the limiting reactant and how many grams of h2 will be produced
Answer: The mass of [tex]H_2[/tex] produced is 0.153 g
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
For zinc:Given mass of zinc = 5.0 g
Molar mass of zinc = 65.38 g/mol
Putting values in equation 1, we get:
[tex]\text{Moles of zinc}=\frac{5.0g}{65.38g/mol}=0.0765mol[/tex]
For HCl:Given mass of HCl = 10.0 g
Molar mass of HCl = 36.46 g/mol
Putting values in equation 1, we get:
[tex]\text{Moles of HCl}=\frac{10.0g}{36.46g/mol}=0.274mol[/tex]
The given chemical equation follows:
[tex]Zn+2HCl\rightarrow ZnCl_2+H_2[/tex]
By stoichiometry of the reaction:
If 1 mole of zinc reacts with 2 moles of HCl
So, 0.0765 moles of zinc will react with = [tex]\frac{2}{1}\times 0.0765=0.153mol[/tex] of HCl
As the given amount of HCl is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.
Thus, zinc is considered a limiting reagent because it limits the formation of the product.
By the stoichiometry of the reaction:
If 1 mole of zinc produces 1 mole of [tex]H_2[/tex]
So, 0.0765 moles of zinc will produce = [tex]\frac{1}{1}\times 0.0765=0.0765mol[/tex] of [tex]H_2[/tex]
We know, molar mass of [tex]H_2[/tex] = 2 g/mol
Putting values in above equation, we get:
[tex]\text{Mass of }H_2=(0.0765mol\times 2g/mol)=0.153g[/tex]
Hence, the mass of [tex]H_2[/tex] produced is 0.153 g
Explain why ionic compounds have such high melting and boiling points
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
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.
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
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:
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 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:
