Answer:
Easy question to answer, you have the concentration and volume of the base and you have the volume of the acid. You need to find the concentration of the acid. C1V1 = C2V2 equation can be used here
Explanation:
Volume of NaOH = 0.0681 L (change mL into L)
Concentration or Molarity of NaOH = 0.143 mol/L
Volume of HCl = 0.025 L (change mL into L)
Concentration or Molarity of HCl = ???
C1V1 = C2V2
Rearrange equation to find C2
(C1 * V1) / V2 = C2
(0.143 * 0.0681) / (0.025)
C2 = 0.389532
Concentration or Molarity of HCl = 0.389 mol/L
Matter is defined as a substance made up of particles that has weight and can occupy space.
There are three main states of matter which include:
Solid: They have their particles vibrate in their fixed positions.
Liquid: The particles are generally slightly further apart than in a solids; and
Gas: particles are widely spaced and tend to be only slightly attracted to each other.
The windsurfer, his board, and his surroundings is made up of particles that are tightly packed together and vibrate in their fixed positions.
Therefore, the components that make up the windsurfer, his board, and his surroundings is matter.
Answer:
what is th question??????????
Someone can help me please??
Answer:
gas heating
Explanation:
the rising curves are the states rising in tempurature while the flat sequences are the states of matter actually changing. A-b is the solid heating, then b-c is the melting (changing into liquid), c-d is liquid heating, then d-e is vaporizing, leaving e-f being gas heating.
edit: typo
Answer:
gas heating
Explanation:
that's all I hope it helps
The atomic weight of an atom is the sum of the mass of the particles in the nucleus of the atom. These particles are called?
a) electrons and neutrons
b) electrons and protons
c) neutrons and protons
d) electrons, protons, and neutrons
Answer:
c) neutrons and protons
Explanation:
The nucleus of the atom contains only neutrons and protons. Electrons are not in the nucleus but outside the nucleus in 'atomic orbitals'.
How does the behavioral adaptation of leaves curling up when touched help a plant survive?
A-Helps generate toxins
B- Acts as a sheild
C- causes predators to lose interest
D-protects pollen
Please Help!!
Answer:
Acts as a sheild so b
Explanation:
Answer
:C- causes predators to lose interest
Explanation:
b was wrong i took the test
What element is the electron configuration representing?
1s2 2s2 2p6 3s2 3p6 4s2.
Answer:
calcium
Explanation:
1s2 2s2 2p6 3s2 3p6 4s2
total number of electrons: 2+2+6+2+6+2=20
the atomic number of the element is 20
the element is calcium
The electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 represents the element calcium (Ca).
The electron configuration notation describes the distribution of electrons in the energy levels or orbitals of an atom. In this case, the numbers and letters indicate the specific orbitals and the number of electrons in each orbital.
Breaking it down:
1s2 represents the 1s orbital with 2 electrons.
2s2 represents the 2s orbital with 2 electrons.
2p6 represents the 2p orbital with 6 electrons.
3s2 represents the 3s orbital with 2 electrons.
3p6 represents the 3p orbital with 6 electrons.
4s2 represents the 4s orbital with 2 electrons.
Considering the filling order of orbitals and the number of electrons, the element with this electron configuration is calcium (Ca).
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I wonder what natural chemicals are
Answer:
An unprocessed chemical is one that is found in nature, such as chemicals from plants, micro-organisms, animals, the earth, and the sea. A synthetic chemical is a chemical that is extracted using a process that does not change its chemical composition but does alter its physical or physiological properties.
Explanation:
Can you mark me brainiest, please?
I need help with this question. I dont understand. Please answer fully since there are 3 marks on question
Answer:
The alpha scattering experiment done by Rutherford proved that an atom is not a bowl of positively charge atom, where the electrons were evenly spread out inside it like the plum pudding model. This is because Rutherford discovered that the atoms are mostly empty space with the aplha particles passing straight through the foil. However, a small number of the alpha particles were deflected and bounced back; meaning that the center of the atom is were the mass was mostly concentrated with a positive charge nucleus.
Hope this helps!
plus someone answer
Explanation:
if the first one was just O, then:
i) no of moles = mass/ molar mass
2= m/ 16
m = 16*2
m = 32g
ii) the second answer would be the same.
Please help I’m marking branlist please
Answer:
The answer would be B
Explanation:
It has a different definition than the other options
Draw a wax structure with the lauric acid + hexadecan-5-ol.
Wax is formed from the combination of alcohol and fatty acid.
Structure of wax, lauric acid and hexadecaneA wax is a type of lipid which is formed from the alcohol and a fatty acid in which alcohol contains about 12-32 carbon atoms while on the other hand, Lauric acid is a fat that is found in many vegetable fats and also use by people as medicine.
Hexadecane is an alkane hydrocarbon which consists of a chain of 16 carbon atoms and 34 hydrogen atoms. Its chemical formula is C₁₆H₃₄.
In conclusion, we can say that wax is formed from the combination of alcohol and fatty acid.
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QUESTION 33
If a 100.-g sample of a metal has a volume of 8.65 mL, what is the density of the metal?
O a, none of these
O b. 11.6 g/mL
c. 0.0865 g/mL
Od 1.16 g/mL
O e. 9 g/mL
Answer:
B.
Explanation:
Density = mass / volume
mass = 100 grams
volume = 8.65 mL
Density = 100 / 8.65 = 11.56 B.
which of the following materials is a mixture?
a. compound
b. oxygen
c. water
d. fruit salad
Which of the following describes humidity?
1) The temperature of the air
2) The weight of the air pressing down on you
3) The amount of water vapor in the air
4) The direction the wind is blowing
Answer: 3) The amount of water vapor in the air.
3.
It was so hard
Explanation:
Nothing
TRUE or FALSE
Nonpolar molecules only have nonpolar bonds.
Answer:
its false
Explanation:
srry if its wrong ;-;
Is this right? How to write potassium chloride plus sodium chloride?
The dissolution of ammonium nitrate in water is given by the following equation:
NH4NO3(s) + heat → NH4+(aq) + NO3-(aq)
Which statement best describes what an energy graph of this reaction would look like?
1. The reactants would appear at a lower energy state than the products.
2. The reactants and products would appear at a low energy state.
3. The reactants would appear at a higher energy state than the products.
4. The reactants and products would appear at a high energy state.
In the energy graph of an endothermic reaction, the reactants would appear at a lower energy state than the products.
What is an endothermic reaction?An endothermic reaction is a reaction in which heat is absirbed from the surroundings in order for the reaction to proceed.
In endothermic reactions, the heat content of the products is higher than the heat content of the reactants.
Therefore, in the energy graph of an endothermic reaction, the reactants would appear at a lower energy state than the products.
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The compound barium acetate is a strong electrolyte. Write the reaction when solid barium acetate is put into water.
Include states of matter in your answer.
Answer:
Explanation:
If any doubt comment your question or what needs clarification.
The compound barium acetate is a strong electrolyte. The reaction when solid barium acetate is put into water is written as
Ba(C₂H₃O₂)₂ --> Ba ²⁺ + 2 C₂H₃O₂⁻¹
Barium acetate has the molecular formula of Ba(C₂H₃O₂)₂. It is a strong electrolyte. Strong electrolytes are those substances which when dissolved in water dissociates into ions. So when this specific substance is placed into water, this compound simply dissociates into its corresponding ionic forms, that is shown below
Ba(C₂H₃O₂)₂ (s)--> Ba ²⁺ (aq) + 2 C₂H₃O₂⁻¹ (aq)
So here We must take note that the 2+ and 1- are the charges of the ion.
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At STP, how many liters of hydrogen are needed to react with 88 g of copper (II) oxide?
Answer:
So if we need to react with 88 gm. of copper 2 then at least 3-4 liters.
Explanation:
Two atoms will likely form a polar covalent bond if the electronegativity difference is
a. 0.1.
b. 1.0.
c. 2.5.
d. 4.0.
Answer:
b. 1.0
Explanation:
In the reaction of hydrogen gas and oxygen gas to form water, the glowing splint..
provides the kinetic energy for the reaction
is one of the products of the reaction
provides the activation energy for the reaction
is one of the reactants of the reaction
The glowing splint in the reaction of hydrogen gas and oxygen gas to form water provides the activation energy for the reaction.
Reaction of hydrogen gas and oxygenA chemical reaction involves the combination of two or more substances to yield a new substance which is different from the starting materials. It may also involve the break up a substance.
Since energy is required for a chemical reaction to take place, the glowing splint in the reaction of hydrogen gas and oxygen gas to form water provides the activation energy for the reaction.
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why must you replace the lids of chemicals immediately
Naturally occurring Indium has two isotopes.
4.28
%
4.28
%
of the atoms are
Indium
−
113
Indium
-
113
(
113
In
113
In
) with a mass of
112.9
u
112.9
u
and
95.72
%
95.72
%
of the atoms are
Indium
−
115
Indium
-
115
(
115
In
115
In
) with a mass of
114.9
u
114.9
u
. Calculate the average atomic mass of Indium with the correct number of significant figures.
Answer:
Average Molar mass is 114.8u
Explanation:
» From the formula of average Relative Atomic Mass [ RAM ]
[tex]{ \rm{RAM = \sum \frac{(isotopic \: mass \times \%abundance)}{100} }} \\ [/tex]
» We have two isotopes of Indium,
Indium-113, mass » 112.9u, % » 4.28%Indium-115, mass » 114.9u, % » 95.72%[tex]{ \tt{RAM = \frac{ \blue{(112.9 \times 4.28)} + { \green{(114.9 \times 95.72)}}}{100} }} \\ \\ { \tt{RAM = \frac{11481.44}{100} }} \\ \\ { \underline{ \underline{ \tt{ \: RAM = 114.8\: }}}}[/tex]
Determine the empirical formula of an oxide of nitrogen containing 70% of oxygen. If the relative molecular mass of the oxide is 92. Deduce its molecular mass
The iron oxide has 69.9
Classify what type of reaction occured in these 3 problems.
1. Hg0------Hg+02 is a decomposition reaction
2.Ca+H20------Ca(OH)2+H2 is a combination reaction
3. KBr+ Cl2-----KCl+Br2 is a displacement reaction
please choose me as BRAINLIEST
A student studied some rocks found beneath the ground surface and learned that heat and pressure within Earth can change these rocks. Which statement describes how the rocks can change? (LT 4)
Your answer:
The heat and pressure can destroy the minerals in the rocks.
The heat and pressure can erode the rocks to form minerals.
The heat and pressure can rearrange the minerals in the rocks
:()
Answer:
The heat and pressure can rearrange the minerals in the rocks
What volume would be occupied by 100. g of oxygen gas at a pressure of 1.50 atm and a temperature of
25 °C?
Answer:
Use PV = nRT. Don't forget T must be in kelvin.
Explanation:
How does the amount of force applied to an object affect its motion?
The greater the mass the greater the amount of force needed to accelerate the object. More force is required to move a heavier object than a lighter object.
What is the frequency of a 1 MeV gamma ray?
1 Mev = 1.602 x 10⁻¹³ J
E = hf
h = Planck's constant (6.626.10⁻³⁴ Js)
Input the value:
f = E : h
f = 1.602 x 10⁻¹³ J : 6.626 x 10⁻³⁴ Js
f = 2.42 x 10²⁰ Hz
A compound contains 70.9% potassium and 29.1% sulfur, what is the empirical formula?
P2O5
P8O20
P6O15
P4O10
Answer:
i think its P6O15
Explanation:
Which metal does not react with dilute hydrochloric acid?
A. Iron
B. Sodium
C. Zinc
D. Copper
Answer:
D. Copper
Explanation:
Less reactive metals like Copper, gold and silver does not react with dilute HCl to produce Hydrogen gas.
Answer:
D. Copper
Explanation:
Copper is less reactive than Hydrogen.