Answer:nate should take away two markers from him
Explanation:
Answer:
2
Explanation:
they would take two away from him
Even though the molecular formula of acetylene is C2H2, and that of benzene is C6H6, these compounds have the same percent composition and therefore the same empirical formula. What is their empirical formula?
Answer:
CH
Explanation:
The empirical formular is the simplest formular of a compound. It shows the relative number of elements present in a compounds. It shows the number of atoms of elements present in simple ratios.
In both compounds, the ratio of the carbon to hydrogen s 1:1
In C2H2;
C : H = 2 : 2 (Which is equivalent to 1 : 1)
In C6H6;
C : H = 6 : 6 (Which is equivalent to 1 : 1)
This means the empirical formular is CH
A scientist who collects and analyzes DNA from a crime scene is a
Answer:
forensic scientist
Explanation:
forensic science is the discipline in which professionals use scientific means to analyze physical crime evidence. this evidence is then presented in court in order to help determine the innocence or guilt of a specific suspect.
Answer:
Its a forensic scientist :D
Explanation:
I took a test and got it wrong but it showed the right answer and its a forensic scientist
(don't ask how i got it wrong i was rushing!!)
If the hydronium ion concentration of a substance is 1.0 X 10-6 M, what would be the pH of that substance??
Show/Describe your work.
please tell me which one?
Answer:
i think its c
Explanation:
What is the mass of 0.25 mole of sodium?
How many Sr2+ ions are present in 0.314 moles of Sr3(PO4)2?
Answer:
5.67x10²³ ions
Explanation:
By looking at the molecular formula, we can tell that there are three Sr²⁺ ions per Sr₃(PO₄)₂ molecule.
We convert Sr₃(PO₄)₂ moles into Sr₃(PO₄)₂ molecules by using Avogadro's number:
0.314 moles * 6.023x10²³ = 1.89x10²³ moleculesFinally we multiply that number by 3 in order to convert Sr₃(PO₄)₂ molecules to Sr²⁺ ions:
1.89x10²³ * 3 = 5.67x10²³ ions.1 point
Which element requires the least amount of energy to remove its valence electron(s)?
barium
chlorine
oxygen
carbon
What volume. In liters, of H2O(g) measured at STP is produced by the combustion of 15.63 g of natural gas (CH4) according to the following equation? CHale) +20269) CO2 + 2H2008)
Answer:
V = 43.95 L
Explanation:
Given data:
Mass of CH₄ decomposed = 15.63 g
Volume of H₂O produced at STP = ?
Solution:
Chemical equation:
CH₄ + 2O₂ → 2H₂O + CO₂
Number of moles of CH₄:
Number of moles = mass/molar mass
Number of moles = 15.63 g/ 16 g/mol
Number of moles = 0.98 mol
Now we will compare the moles of H₂O with CH₄.
CH₄ : H₂O
1 : 2
0.98 : 2×0.98 = 1.96 mol
Volume of hydrogen:
PV = nRT
1 atm × V = 1.96 mol × 0.0821 atm.L/mol.K × 273.15 K
V = 43.95atm.L / 1atm
V = 43.95 L
Mixtures that have the same composition throughout are ________.
Why do gases diffuse more quickly than liquids?
Choose the correct answer.
A) Liquids can be compressed easily.
B)The particles in gases are not mobile.
C)Liquids are always at lower temperatures than gases.
D)Gas particles move rapidly and have space between them.
Answer:
D)Gas particles move rapidly and have space between them.
Explanation:
Matter exists in three states namely: solids, liquids and gases. The particles contained in these three states are different from one another. In the gaseous state, the particles are FAR APART from one another i.e. space exists and they move at a very fast rate in contrast to the particles of a liquid, which have less space and move slower.
This rapid movement of gas particles within a less restricted space accounts for the reason why gaseous substances DIFFUSE more quickly than liquids.
formal charge of hcooh
Answer:
What is the question?
If a catalyst lowers the activation energy, what raises the activation energy?
heat
a reaction
another catalyst
an inhibitor
Answer:
an inhibitor
Explanation:
An inhibitor will raise the activation energy of a chemical system because it works in the opposite way a catalyst works.
A catalyst is any chemical substance the increases the rate of chemical reaction. They simply bind the substrate and bring them into reaction instead of passing through the high energy peaks.
An inhibitor works in an opposite way. They raise the activation energy of a reaction and prevents a reaction from taking place.
Answer:
An inhibitor
Explanation:
i did this on edge2020
have a good day
25. Which of the following statements concerning atomic structure is/are correct?
1. The nucleus contains most of an atom's mass.
2. The nucleus contains all the positive charge of an atom.
3. Electrons surround the nucleus and account for the majority of an atom's volume.
1 only
2 only
3 only
2 and 3
1, 2, and 3
Answer:
It would be 2 and 3
The image shows the structure of an atom, I hope it helps :)
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, the correct option is option 2,3.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron. The nucleus contains all the positive charge of an atom. Electrons surround the nucleus and account for the majority of an atom's volume.
Therefore, the correct option is option 2,3.
To know more about atom, here:
https://brainly.com/question/13518322
#SPJ2
A beverage manufacturer wants to increase The solunility of carbon dioxide in its carbonated drinks as beverages produced which action will increase the solubility of CO2 gas the most
A. Decreasing the pressure on it
B. Increasing stirring
C. Decreasing its temperature
D. Increasing its temperature
Answer: C
Explanation:
20 POINTS
What is true about the Sun, light bulbs, and flames?
AThey are all made of fire.
BThey are all made by people.
CThey are all found in nature.
DThey are all sources of light energy.
Answer:
D
Explanation:
Light blubs are not made of fire.
The sun wasnt made by humans.
You cant find Light bulbs in nature.
Meaning it is D.
PLEASE HELP IM TIMED
Which of the following is not an oxidation-reduction reaction?
Upper X e upper F subscript 6 (s) right arrow upper X e upper F subscript 4 (s) plus upper F subscript 2 (g).
2 upper C s (s) plus upper I subscript 2 (g) right arrow 2 upper C s upper I (s).
2 upper H subscript 2 upper S upper O subscript 4 (a q) plus 2 upper B a (upper O upper H) subscript 2 (a q) right arrow 2 upper B a upper S upper O subscript 4 upper H subscript 2 upper O (l).
Upper Z n (s) lus 2 upper A g upper N upper O subscript 3 (a q) right arrow upper Z n (upper N upper O subscript 3) subscript 2 (a q) plus upper A g (s).
Answer: choice 2
Explanation:
Does water take up space (have volume)? Yes or no
Answer:
Yes
Explanation:
The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed below. Which of these elements is in this group?
Characteristics of a group of elements
•is shiny
•is solid at room temperature
•has atoms with two valence electrons
A-silicone
B-lithium
C-strontium
D-aluminum
Answer:
C:Strontium
Explanation:
What total volume of ozone measured at a pressure of 24.5 mmHg and a temperature of 232 K can be destroyed when all of the chlorine from 15.5 g of CF3Cl goes through 10 cycles of these reactions
Answer:
[tex]1.75272\ \text{m}^3[/tex]
Explanation:
The breakdown reaction of ozone is as follows
[tex]CF_3Cl + UV \rightarrow CF_3 + Cl[/tex]
[tex]Cl + O_3 \rightarrow ClO + O_2[/tex]
[tex]O_3 + UV \rightarrow O_2 + O[/tex]
[tex]ClO + O \rightarrow Cl + O_2[/tex]
It can be seen that 2 moles of ozone is required in the complete cycle
So for 10 cycles, 20 moles of ozone is required
m = Mass of [tex]CF_3Cl[/tex] = 15.5 g
M = Molar mass of [tex]CF_3Cl[/tex] = 104.46 g/mol
P = Pressure = 24.5 mmHg
T = Temperature = 232 K
R = Gas constant = [tex]62.363\ \text{L mmHg/K mol}[/tex]
Number of moles is given by
[tex]n=\dfrac{m}{M}\\\Rightarrow n=\dfrac{15.5}{104.46}\\\Rightarrow n=0.1484\ \text{moles}[/tex]
[tex]20\ \text{moles} = 20\times 0.1484 = 2.968\ \text{moles}[/tex]
From ideal gas law we have
[tex]PV=nRT\\\Rightarrow V=\dfrac{nRT}{P}\\\Rightarrow V=\dfrac{2.968\times 62.363\times 232}{24.5}\\\Rightarrow V=1752.72\ \text{L}=1.75272\ \text{m}^3[/tex]
For 20 cycles of the reaction the volume of the ozone is [tex]1.75272\ \text{m}^3[/tex].
The Total volume of Ozone measured is = 1.7527 m³
Given data :
Mass of CF₃Cl = 15.5 g
Molar mass of CF₃Cl = 104.46 g/mol
Pressure ( P ) = 24.5 mmHg
T = 232 K
Gas constant ( R ) = 62.363 L mmHg/K mol
Note : For a complete ozone cycle 2 moles of ozone is required therefore for 10 cycles 20 moles of ozone will be required
First step : Determine number of moles in each cycle reaction
n = m / M ----- ( 1 )
m = mass = 15.5 g
M = molar mass = 104.46 g/mol
∴ n = 15.5 / 104.46 = 0.1484
Hence the number of moles in 10 cycle = 20 * 0.1484 = 2.968 moles
Next step : Apply Ideal gas law to determine the volume of Ozone
PV = nRT ----- ( 2 )
n = 2.968
V = ?
R = 62.363 L mmHg/K mol
T = 232 K
P = 24.5 mmHg
∴ V = nRT / P --- ( 3 )
= ( 2.968 * 62.363 * 232 ) / 24.5
= 1752.72 L ≈ 1.7527 m³
Hence we can conclude that the Total volume of Ozone measured is = 1.7527 m³
Learn more : https://brainly.com/question/20335707
Salt is water solution is made salt or water
Answer:
Both
Explanation:
because salt water comes from water mixing with salt
what elements make up duralumin( an alloy)?
Answer:
In addition to aluminium, the main materials in duralumin are copper, manganese and magnesium.
Answer:
The original composition has been varied for particular applications; it may contain about 4 percent copper, 0.5–1 percent manganese, 0.5–1.5 percent magnesium, and, in some formulations, some silicon.
Analysis of the water content of a lake found in the desert showed that it contained 17.5 percent chloride ion, and has a density of 1.23 g/mL. What is the molarity of the chloride ion in the water
Answer:
The molarity is 6.0 M.
Explanation:
The concentration of a solution is the amount of solute present in a given amount of solvent, or a given amount of solution.
In this problem, we are asked to convert percent by mass to molarity, which are two different concentration units.
The percent by mass is the ratio of the mass of a solute to the mass of the solution, multiplied by 100 percent. On the other hand, molarity (M) is defined as the number of moles of solute per liter of solution.
If we have 17.15 percent chloride ion, that means that we have 17.15 grams of chloride ion in 100 grams of solution. The density provided is the density of the solution, so we calculate how many mL correspond to 100 grams of solution:
1.23 g ----------- 1 mL
100 g ------------ x= 81.3 mL
Therefore, 17.5 grams of chloride ion are contained in 81.3 mL. Now we need to convert these grams into moles.
The atomic mass of chlorine is 35.5 g/mol:
35.5 g --------------- 1 mol
17.5 g --------------- x= 0. 49 mol
This 0.49 moles are contained in 81.13 mL, the definition of molarity says that this moles are contained in a liter (or what is the same, 1000 mL):
81.3 mL --------------- 0.49 mol
1000 mL ------------- x= 6.0 M
The molarity of the chloride ion will be 6.0 M.
1. How many energy sublevels are in the second principal energy level? 4 3 1 2
Answer:
2
Explanation:
TRUE OR FALSE? Alloys are used more than pure metals because they are generally softer and less likely to react with air or water.
Alloys are used much more than pure metals because they are generally stronger and less likely to react with air or water...
So I would say false
All the following are physical properties of metals EXCEPT
a. malleability
c. conductivity
b. brittleness
d. ductility
Explanation:I think it's option b) brittleness
I hope this might help u
What is the concentration of silver ions in a saturated solution of Ag3PO4? Ksp (Ag3PO4) = 8.9 x 10−17.
Answer:
4.3x10⁻⁵ mol/L.
Explanation:
Hello there!
In this case, since the dissolution of silver phosphate is not completely achieved due to its low solubility in water, we can represent this as an equilibrium problem by which it separates into silver and phosphate ions:
[tex]Ag_3PO_4(s)\rightleftharpoons 3Ag^+(aq)+PO_4^{3-}(aq)[/tex]
Which are slightly soluble in water; it means that the equilibrium expression is:
[tex]Ksp=[Ag^+]^3[PO_4^{3-}][/tex]
Thus, since we know the solubility product and the concentration of these ions in a saturated solution is represented by the reaction extent [tex]x[/tex], we can write:
[tex]8.9x10^{-17}=(3x)^3(x)[/tex]
Thus, solving for [tex]x[/tex] we obtain:
[tex]x=\sqrt[4]{\frac{8.9x10^{-17}}{27} } \\\\x=4.3x10^{-5}M[/tex]
Thus, the molar concentration of silver ions is 4.3x10⁻⁵ mol/L.
Best regards!
Which energy transformation produces electricity and is least likely to negatively impact the environment?
Generating electricity from a natural gas-fired power plant
Generating electricity from a natural gas-fired power plant
Generating electricity from a coal-fired power plant
Generating electricity from a coal-fired power plant
Generating electricity from a nuclear power plant
Generating electricity from a nuclear power plant
Generating electricity from a solar panel system
Generating electricity from a solar panel system
electricity from solar panels
Explanation:
All other options produce something after or during the time electricity is made. That something is gas. Not solar
When a material gains thermal energy and melts, it is undergoing a physical change.
Answer:
True, it undergoes a physical change.
Explanation:
A physical change is a change that does not change the chemical makeup of a material. This includes altering its shape.
a goup of cells that work together to perform a specific function.
Answer:
Cell Differentiation and Tissue.
Explanation:
tissues are organized communities of cells that work together to carry out a specific function.
PLEASE HELP ME! I am confused on this.
Answer:
Mohammed has less kinetic energy
Explanation:
m=Kg
V= m/s
KE= kinetic energy = J
the way you work out the answer is:
KE = 1/2 × m × v squared