Answer:
100008
Explanation:
The v/v concentration of 160ml pure acetic acid in 650ml solution is 24.61 %.
There is 160ml of pure acetic acid in the 650 ml solution of acetic acid.
The volume/volume concentration of acetic acid can be calculated as:
Volume/Volume = [tex]\rm \frac{volume\;of\;acetic\;acid}{Volume\;of\;solution}\;\times\;100[/tex]
v/v = [tex]\rm \frac{160}{650}\;\times\;100[/tex]
v/v = 0.2461 [tex]\rm \times[/tex] 100
v/v = 24.61 %
The concentration of pure acetic acid in the 650 ml solution is 24.61 % (v/v).
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The energy of a pendulum is recorded at different positions in the table below. Use the data in the table to determine the amount of kinetic energy the pendulum had at Position 2.
Answer:
46.5 J
Explanation:
I did it in stemscopes.
1. Using what you know about the of molecules in a liquid, explain alcohol moves down a cooled thermometer.
2. The animation shows that the molecules spread out slightly when heated. Do you think the thermometer would work as well if the tube of red liquid were wider? Why or why not? Use evidence to support your answer.
Answer:
oss sees djjekejjddhiwiwjjxbuekes
What are the signs of a chemical reaction?
A. Color change and gas released
B. Color, Gas, Explosion, Smoke,
Precipitate
C. Color, Gas, Light, Temperature, Precipitate
Answer:
C
Explanation:
Because i just had to do this on my assignment and got 100
Answer:
hey , its option c because in chemical reaction colour + evolution of gas takes place + temp. + precipitation. but also light can come in the case of chemical reaction.
2 points
2. CsH&BrCl is a compound. What is the ratio of carbon to bromine atoms
in the molecule?
O 1:1
1:3
O 1:6
3:1
3:6
61
361
Answer: The ratio of carbon to bromine atoms in the molecule is 3:1
Explanation:
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass. It can be decomposed into simpler constituents using chemical reactions.
Chemical formula shows the elements in a compound and the relative proportions of those elements.
The chemical formula given for the compound is [tex]C_3H_6BrCl[/tex] which means the ratio of carbon to bromine atoms is 3: 1.
Thus the ratio of carbon to bromine atoms in the molecule is 3:1
Positive oxidation number suggest the element wants to ____ (gain/lose) electron
Answer:
lose electron
Explanation:
If the oxidation number is positive, this means that the atom loss electrons.
Losing electrons makes the atom lose some of its negative charge and become more positively charged.
Hope that helps.
Does this equation follow the laws of conservation of mass? why?
CuO(s) + H2(g) = Cu(s) + H2O(g)
(twos are subscript_)
Answer:
Yes
Explanation:
Chemical equation:
CuO + H₂ → Cu + H₂O
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
In given reaction:
CuO + H₂ → Cu + H₂O
there are 1 copper atoms, one oxygen atoms and two hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
Need Help ! ASAP !! Please
Answer:
Option 1.
Explanation:
3.6cm * 1inch/2.54 cm = 1.417 inch
How many formula units are in 9.3 g of alumina (Al2O3)?
Answer in units of formula units.
Answer:
5.5 × 10²² formula units Al₂O₃
General Formulas and Concepts:
Chemistry - Stoichiometry
Reading a Periodic TableDimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
9.3 g Al₂O₃
Step 2: Define conversions
Avogadro's Number
Molar Mass of Al - 26.98 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of Al₂O₃ - 2(26.98) + 3(16.00) = 101.96 g/mol
Step 3: Convert
[tex]9.3 \ g \ Al_2O_3(\frac{1 \ mol \ Al_2O_3}{101.96 \ g \ Al_2O_3} )(\frac{6.022 \cdot 10^{23} \ formula \ units \ Al_2O_3}{1 \ mol \ Al_2O_3} )[/tex] = 5.4928 × 10²² formula units Al₂O₃
Step 4: Check
We are given 2 sig figs. Follow sig fig rules.
5.4928 × 10²² formula units Al₂O₃ ≈ 5.5 × 10²² formula units Al₂O₃
How many total oxygen atoms are in 2Ba(NO3)2
Answer:
6
Explanation:
How many inner transition metals are there?
Answer: 28 inner transition elements
Animals and humans obtain the energy they need from what?
A. food
B. water
C. carbon dioxide
D. photosynthesis
Answer:
A. Food
Explanation:
Water alone does not give energy, Carbon Dioxide cannot be consumed healthily, and photosynthesis is for plants.
A chemical equation can be used to solve stoichiometry problems provided that it....
indicates only the forward reaction and not the reverse.
indicates that reactants are in the gas phase and are not solids or liquids.
includes the coefficients that are needed for balancing the equation.
includes the state of matter after each substance.
Answer:
includes the coefficients that are needed for balancing the equation.
Explanation:
A chemical equation can be used to solve stoichiometry problems provided that it includes the coefficients that are needed for balancing the equation.Hence, Option (C) is Correct.
What is Balanced Equation ?
An equation that has an equal number of atoms of each element on both sides of the equation is called a balanced chemical equation, i.e., the mass of the reactants is equal to the mass of the products.
Therefore, A chemical equation can be used to solve stoichiometry problems provided that it includes the coefficients that are needed for balancing the equation.Hence, Option (C) is Correct.
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Silver is mainly recovered as a byproduct of the bulk mining of other metals such as copper, lead, zinc and gold. Where in the United States do you think silver recovery would happen?
Answer:
Explanation:
This question appear incomplete because of the absence of options. However, places where silver recovery would happen in the United States are states where huge mining of copper, lead, zinc or gold are been mined. Examples of such places include Arizona, California and Oregon; where copper (and some other metals in some cases like gold in Oregon) is heavily mined and silver is recovered as a byproduct.
I need help pleases and can you explain
Answer:butterflies
Explanation:
Nah man you are on your own.
The Mississippi River carries tons of tiny rock fragments called sediments into the Gulf of Mexico. What do you think will happen to these sediments after a few million years?
Answer:build up
Explanation:
Answer:
The sediments will be transformed into rock.
Explanation:
Hope this helps, Good Luck, let me know if i am wrong, and Brainliest?
Which area of the atom
contains the most mass, but
the least volume?
Answer:
It is nucleus.
Explanation:
As you see in pic in center you see protons and neutrons. And electrons are surrounding them.
The mass of proton and neutron us close together but electron has the less mass.
When an object that is made of magnetic material but is not a magnet comes in contact with a magnet _____. PLS ANSWER FAST
Answer:
Magnetic domains fall into alignment and it begins to attract other objects.
Which of the following accurately describes a synthesis reaction?
Answer:
The 5th answer
Explanation:
This can be easily remembered by
A + B --> AB
ex:
2Na(s) + Cl2(g) --> 2NaCl(s)
10. Write the formula for the compounds: copper (1) chloride and copper (II) chloride
Answer:
Copper(II) chloride (CuCl2) reacts with several metals to produce copper metal or copper(I) chloride (CuCl) with oxidation of the other metal.
Explanation:
There are two types of chemical compound one is covalent compound and other is ionic compound. The formula for the compounds: copper(I) chloride and copper (II) chloride are CuCl and CuCl[tex]_2[/tex] respectively.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion. Covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron.
The chemical formula for Copper(II) chloride is (CuCl[tex]_2[/tex]). The chemical formula for copper(I) chloride (CuCl). The number in the roman is the oxidation state of the metal. Copper(II) is called cupric, copper(I) is called cuprous.
Therefore, the formula for the compounds: copper(I) chloride and copper (II) chloride are CuCl and CuCl[tex]_2[/tex] respectively.
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Okay so I am working on polyatomic ions and need help what is the name of this element KCH3COO
Answer:
its potassium acetate
Explanation:
.............................
What is the volume of 8.80 g of CH4 gas at STP?
Answer:
12.32 L.
Explanation:
The following data were obtained from the question:
Mass of CH4 = 8.80 g
Volume of CH4 =?
Next, we shall determine the number of mole in 8.80 g of CH4. This can be obtained as follow:
Mass of CH4 = 8.80 g
Molar mass of CH4 = 12 + (1×4) = 12 + 4 = 16 g/mol
Mole of CH4 =?
Mole = mass/Molar mass
Mole of CH4 = 8.80 / 16
Mole of CH4 = 0.55 mole.
Finally, we shall determine the volume of the gas at stp as illustrated below:
1 mole of a gas occupies 22.4 L at stp.
Therefore, 0.55 mole of CH4 will occupy = 0.55 × 22.4 = 12.32 L.
Thus, 8.80 g of CH4 occupies 12.32 L at STP.
Fields allow some objects to exert forces on each other even when they are not ________.
Answer:
in contact
Explanation:
Fields allow some objects to exert force on each other even when they are not contact with one another.
The region of space where the effect of a force is felt is know as a field.
Field forces for provides a non-contact means of exerting forces. They objects do not have to be in contact before the force is felt. An example is the gravitational force field.Fields allow some objects to exert forces on each other even when they are not in contact .
Which cellular process produces simple sugars?
A. mitosis
B. photosynthesis
C. respiration
D. waste elimination
Answer:
The answer is C. Hope this helps you out!
Answer:
C. Respiration
✂---------------
What would happen to a plant if you grew it in a room without cabon dioxide
Answer:
One of the byproducts of respiration is CO2, this is the opposite of photosynthesis. It is not unusual for plants to stop taking in carbon dioxide to uptake small amounts of oxygen at night. In the event that plants cease to take up CO2 all together, they will cease to convert sunlight into carbohydrates, and die.17/01/2019
Explanation:
how did quantum mechanics change our understanding of atoms
Answer:
in quantum mechanics, electrons exist in a cloud-shaped area outside the nucleus.
Explanation:
How many parts does CsF ( Cesium Fluoride ) have?
Plz help hurry! I will give brainlest
Answer: mitochondria
Explanation:
it affects the cell because it produces the power of the cell, let me know if this helpes
i need help please will give brainliest
Answer:
1) Least reactive 2) Halogens 3) Nonmetals
Explanation:
Can someone please help and list what each type of thing they are? (Element, Compound, Mixture of elements, Mixture of compounds, Mixture of elements and compounds)
Can somebody plz help answer all of these questions right it’s very important. If u can that will be amazing thanks!
WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST :DDD
Answer:
1. Mechanical energy
2. Heat/thermal energy
3. Electrical energy
4. Heat energy
5. Electrical energy
Explanation:
Hope this helped!