Answer:
yes
Explanation:
the name for the following formula C9H18 should be
O octane
O octene
O nonane
O nonene
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:
Add 250.0mL to 5.00mL and round off the answer
Answer:
255mL
Explanation:
(250.0 + 5.00)mL = 255.00mL
255mL
Which of these is NOT a predator or a prey?
A : Ant
B : corn
C : crocodile
D : antelope
Answer:
predator: crocodile, antelope
prey: ant
corn
Please do these questions, will give brainliest
Answer:
1.c 2.a.3.d 4.a
Explanation:
that is tge answer
A baseball player hits a ball. Which is the best description of the energy of the ball as it flies over the pitcher's head?
O chemical
O kinetic
O nuclear
O thermal
The simple activities like walking, jumping, throwing and falling usually involves kinetic energy. Here the energy of ball when a baseball player hits a ball is kinetic energy. The correct option is B.
What is kinetic energy?The kinetic energy of an object is defined as the measure of the work that an object does by virtue of its motion. When work is done on an object, energy is transferred and the object moves with a constant speed. This energy transferred is kinetic energy.
It is possible to transfer kinetic energy between objects and can be transformed into other form of energy. The SI unit of kinetic energy is Joule and it is proportional to the square of velocity and mass of the object.
Here the moving ball has kinetic energy due to its stae of motion.
Thus the correct option is B.
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What is the mole fraction of ethanol when 23.2 g of ethanol(C2H5OH) are mixed with 73.1 g of water(H2O)?
(atomic mass of C= 12, H = 1, O = 16,)
Answer:
0.111
Explanation:
Step 1: Calculate the moles corresponding to 23.2 g of ethanol
The molar mass of C₂H₅OH is 46 g/mol.
23.2 g × 1 mol/46 g = 0.504 mol
Step 2: Calculate the moles corresponding to 73.1 g of water
The molar mass of H₂O is 18 g/mol.
73.1 g × 1 mol/18 g = 4.06 mol
Step 3: Calculate the total number of moles
n = nC₂H₅OH + nH₂O = 0.504 mol + 4.06 mol = 4.56 mol
Step 4: Calculate the mole fraction of ethanol
We will use the following expression.
Χ(C₂H₅OH) = nC₂H₅OH / n
Χ(C₂H₅OH) = 0.504 mol / 4.56 mol = 0.111
where is distillation used
Answer:
During separation of substances with different boiling points, fractional distillation is used.
During separation of substances in an eutectic mixture or azeotropic mixture, steam distillation is used.
How many atoms are in 10.1 g Ne
Answer:
3.01 × 10²³ atoms Ne
General Formulas and Concepts:
Atomic Structure
Reading a Periodic TablesMolesStoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
Identify
[Given] 10.1 g Ne
[Solve] atoms Ne
Step 2: Identify Conversions
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
[PT] Molar Mass of Ne: 20.18 g/mol\
Step 3: Convert
[DA] Set up: [tex]\displaystyle 10.1 \ g \ Ne(\frac{1 \ mol \ Ne}{20.18 \ g \ Ne})(\frac{6.022 \cdot 10^{23} \ atoms \ Ne}{1 \ mol \ Ne})[/tex][DA] Divide/Multiply [Cancel out units]: [tex]\displaystyle 3.01398 \cdot 10^{23} \ atoms \ Ne[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
3.01398 × 10²³ atoms Ne ≈ 3.01 × 10²³ atoms Ne
What are the constituents of the gases in the atmosphere
Answer:
Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases. Trace amounts of carbon dioxide, methane, water vapor, and neon are some of the other gases that make up the remaining 0.1 percent.
Explanation:
Read the following reactions.
Reaction 1: NaCl(s) -> Na+ (aq) + CI-
Reaction 2: N2 + 3H2 -> 2NH3
Which reaction leads to an increase in entropy?
Only Reaction 1
Only Reaction 2
Both Reaction 1 and 2
Neither Reaction 1 nor 2
Answer:
Only Reaction 1
Explanation:
In reaction 1, there is a change in state from solid to liquid. Hence, there is an increase in number of ways particles and their energies could be arranged. As a result, entropy increases.
In reaction 2, there is a decrease in amount of gas particles (4 mol to 2 mol). Hence there is a decrease in the number of ways particles and their energies could be arranged. As a result entropy decreases
Only Reaction 1 will lead to an increase in entropy.
What is Entropy?This is the degree of disorderliness or randomness of a particle and it is
denoted as S.
In states of matter, conversion from solid to other states such as liquid
brings about increase in entropy which is why only reaction 1 experienced
this phenomenon.
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What must happen to the atoms before they are accelerated in the mass spectrometer?
Answer:
Atoms and molecules can be deflected by magnetic fields - provided the atom or molecule is first turned into an ion. Electrically charged particles are affected by a magnetic field although electrically neutral ones aren't. The atom or molecule is ionised by knocking one or more electrons off to give a positive ion.
Explanation:
Please Mark me brainliest
The atom must first be ionized.
The mass spectrometer is an important analytical tool in chemistry. It is used to identify atoms and molecules.
However, the atom or molecule to be analysed must first be converted into an ion.
This happens when the instrument imparts an electrical charge to the molecule or atom then the electrically charged ions are read as electrical current. The ion is accelerated towards a detector which analyses the deflected ions.
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Which of these takes place when a chemical change occurs?
A. Bonds connecting atoms in products and reactants form.
B. Bonds connecting atoms in products and reactants break.
C. Bonds connecting atoms in reactants break, and bonds connecting atoms in products form.
D. Bonds connecting atoms in reactants form, and bonds connecting atoms in products break.
Answer:
In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.
Explanation:
Anyone tryna help mee
Answer:
It is a solid
Calculate the volume in Liters of 15 moles of Neon gas (at STP)
Al + AgNO3 -> Al(NO3)3 + Ag. As a balanced equation
Answer:
Al + 4AgNO3 >>Al(NO3)3+ 3Ag
Explanation:
the number of moles of No3 of the products is 3 therefore we have to balance the reactants by adding 3 before the "AgNO3" which also leades us to adding 3 mols to Ag on the products side
Which environment has lower temperatures at higher elevations?
A: Desert
B: Grassland
C: mountain
D: Swamp
Explain the difference between solid liquid and gaseous states using the theoritical
Answer:
solid is the substance which is hard
liquid is the substance which we get in liquid form for example water milk etc
gases are those substance which we cannot touch and see
The chemical equation of rusting of iron is given
Fe + O2 → 2Fe2O3
a) Write the reactants and products in this reaction
b) Write the total number of reactant atoms
c) Can you balance the above equation?
Answer:
[tex]{ \tt{(a). { \bf{reactants : { \tt{iron \: and \: oxygen}}}}}} \\ { \bf{products : { \tt{iron(iii)oxide}}}} \\ \\ { \tt{(b).}} \: { \bf{1.204 \times {10}^{24} \: atoms}} \\ { \tt{(c).}} \: { \tt{4Fe +3 O _{2} → 2Fe _{2}O _{3}}} \\ \\ { \underline{ \blue{ \tt{becker \: jnr}}}}[/tex]
number of moles of sodium azide
Answer:
0.015382279644614 mole.
Answer:
yes this is the answer for that quaz
How many atoms are in a 1.8 mol sample of Magnesium (Mg)?
Answer:
1.1 × 10²⁴ atoms Mg
General Formulas and Concepts:
Atomic Structure
MolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
Identify
[Given] 1.8 mol Mg
[Solve] atoms Mg
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[DA] Set up: [tex]\displaystyle 1.8 \ mol \ Mg(\frac{6.022 \cdot 10^{23} \ atoms \ Mg}{1 \ mol \ Mg})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 1.08396 \cdot 10^{24} \ atoms \ Mg[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
1.08396 × 10²⁴ atoms Mg ≈ 1.1 × 10²⁴ atoms Mg
Answer: 1.0836 * 10^24 atoms
This value is approximate
===========================================================
Explanation:
1 mole = 6.02*10^23 atoms approximately
This applies to any element.
Multiply both sides by 1.8 and we get...
1 mole = 6.02*10^23 atoms
1.8*1 mole = 1.8*6.02*10^23 atoms
1.8 mole = 10.836*10^23 atoms
1.8 mole = (1.0836*10)*10^23 atoms
1.8 mole = 1.0836 * 10^(1+23)
1.8 mole = 1.0836 * 10^24 atoms
Is the reaction shown, relating carbon dioxide and pH, a reversible process?
Answer:
Yes it is reversible for the reaction.
Which gas would effuse more slowly:
Xe
CO2
CH4
N2
N2 should be the gas to effuse more slowly
balance equation
Mg + HN03 -> Mg (N03)2 + N0 + H20
As the waves travel across the pan, matter is transported and hits the side of the pan
true or false?
metals and their ore
Answer:
Zinc
Zinc blende
(ZnS)
-----------------
Lead
Galena
(PbS)
-----------------
Mercury
Cinnabar
(HgS)
----------------
Copper
Copper glance
(Cu2S)
-------------------
Explanation:
Had to learn this for a test
Also, I plead the 5th
Which yield comes from measurements obtained during a real experiment?
A) actual yield
B) theoretical yield
C) percent yield
Answer:
A) actual yield
Explanation:
Actual yield is the amount of product that is actually produced in a chemical reaction.
Theoretical yield is the amount of product expected based on stoichiometry.
Per cent yield is the actual yield over the theoretical yield.
Which cannot be chemically broken down into simpler substances?
compound
element
solution
mixture
Answer:
B.
Explanation:
elements
When you perform a stoichiometry calculation, you are determining the ...
A) actual yield
B) theoretical yield
C) percent yield
Answer:
B. Theoretical yield
Explanation:
Hope its help:)
The balanced equation below represents the reaction between carbon and hydrogen to produce
ethane.
2C(s) + 3H2(g) → C2H6(g) + energy
Determine the number of moles of O2(g) needed to completely react with 8.0 moles of CO(g).
Please help!!!
Answer:
4.0 moles
Explanation:
Based on the given reaction between carbon and hydrogen, the equation of the reaction between O₂ and CO is as follows:
2CO(g) + O₂(g) → 2CO₂(g)
The number of moles of O₂ needed to completely react with 8.0 moles of CO can be calculated knowing that 2 moles of CO react with 1 mol of O₂:
[tex] n_{O_{2}} = \frac{1 mol O_{2}}{2 moles CO}*8.0 moles CO = 4.0 moles O_{2} [/tex]
Therefore, the number of moles of O₂ needed is 4.0.
I hope it helps you!