Answer:
Color and Melting Point
Answer:
Explanation:
Color melting point
What is the mass of 2.1 moles of Sodium Chloride?
Answer:
120 g NaCl
General Formulas and Concepts:
Reading a Periodic TableDimensional Analysis (DA)Writing compoundsExplanation:
Step 1: Define
2.1 moles NaCl (sodium chloride)
Step 2: Define conversions
Molar Mass of Na - 22.99 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of NaCl - 22.99 + 35.45 = 58.44 g/mol
Step 3: Convert (DA)
[tex]2.1 \ mol \ NaCl(\frac{55.84 \ g \ NaCl}{1 \ mol \ NaCl} )[/tex] = 122.724 g NaCl
mol NaCl and mol NaCl cancel outleft with g NaCl as final unitsStep 4: Check
We have 2 sig figs. Follow sig fig rules.
122.724 g NaCl ≈ 120 g NaCl
If lamp 1 is unscrewed from its holder, what will happen to lamp 2 and why?
A bond in which two atoms share a pair of electrons is a ionic bond or covalent bond or metallic bond?
Answer:
Covalent
Explanation:
Ionic gives or takes electrons
Metallic isn't really a "type" of bond
Boyles Law P1V1 = P2V2
An arrangement of helium balloons in the back of a delivery truck travels from a town at the base of a mountain up the mountain where the air pressure is half the amount. What do you expect to happen to the balloons?
A.The balloons will increase to twice their original volume.
B. The balloons will decease to one fourth their original size.
.C.The balloons will increase to four times their original size.
D.The balloons will decrease to half their original size.
Answer:
A. The balloons will increase to twice their original volume.
Explanation:
Boyle's law states that the pressure exerted on a gas is inversely proportional to the volume occupied by the gas at constant temperature. That is:
P ∝ 1/V
P = k/V
PV = k (constant)
P = pressure, V = volume.
[tex]P_1V_1=P_2V_2[/tex]
Let the initial pressure of the balloon be P, i.e. [tex]P_1=P[/tex], initial volume be V, i.e. [tex]V_1=V[/tex]. The pressure is then halved, i.e. [tex]P_2=\frac{P}{2}[/tex]
[tex]P_1V_1=P_2V_2\\\\P*V=\frac{P}{2} *V_2\\\\V_2=\frac{2*P*V}{P}\\\\V_2=2V[/tex]
Therefore the balloon volume will increase to twice their original volume.
True or False: There are more air particles in a closed syringe when the air is compressed.
20 points. ASAP!
So u separated Sand and salt from a mixture through evaporation and filtration. Now what is your observations and decision?
Answer:
When two or more substances, that do not react chemically, are blended together,
the result is a mixture in which each component retains its individual identity and
properties.
The separation of the components of a mixture is a problem frequently encountered
in chemistry. The basis of the separation is the fact that each component has a
different set of physical and chemical properties. The components are pure substances
which are either elements or compounds. Under the same conditions of pressure and
temperature, the properties of every sample of a pure substance are identical. Each
sample melts at the same temperature, boils at the same temperature, has the same
solubility in a given solvent, etc.
Steel density of 7.8 g/cm3.what is the volume of a 780 gram piece of steel?
Answer:
The answer is 100 cm³Explanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question we have
[tex]volume = \frac{780}{7.8} \\ [/tex]
We have the final answer as
100 cm³Hope this helps you
What is one cubic centimeter equivalent to
0.06102374 in^3
or in scientific notation would be 1.0 x 10^-6 m^3
pls help me
what bond does not burn
Answer:
Iconic bonds don't burn easily
Explanation:
Covalent bonds are non metals. Covalent bond (sharing), low temp, low temp, burn easily, poor, polar covalent is good and non-polar covalent is bad.
Ionic - metals and nonmetals, ionic bond is when electrons are gained or lost, high temp, high temp, doesn't burn easily, good, good
Answer:
Explanation:
what do you mean by bond?
How do particles in a sample of matter interact when the sample is in a different state (solid,
liquid, and gas)?
Atoms are not changed in a reaction. They are just _____
A.conservation
B.equal
C.Equation
D.product
E.reactant
J.rearranged
Help please I need the answer ASAP
Atoms are not created or destroyed in a chemical reaction, they are just rearranged from the reactants to form the products. This is the reason why symbol equations must be balanced.
1. Pure Substances can be broken down by physical changes.
True
False
Answer:
False
Explanation:
What are the criteria for purity
Answer:
melting and boiling points
Explanation:
The technique for determination of melting and boiling points will also be described in this unit. Pure solid and liquid compounds possess sharp melting and boiling points. Therefore, melting and boiling points of a compound
A solution is made by dissolving
3.60 g of sodium chloride in water to
a final volume of 115 mL solution.
What is the weight/weight % or
percent by mass of the solute?
Use 1.00 g/mL for the density of the solution.
Answer: 3.13%
Explanation:
Answer:
3.13
Explanation:
:)
What type of mass movement has materials that move in a single mass or block
Answer:
The correct answer is slump
Explanation:
slump, which occurs when rock and soil slide quickly down a steep slope. Such mass movement is common where road builders have cut highways through hills or mountains.
Answer:
slump
Explanation:
2021 edge
explain the coin and feather experiment. what conclusion can be drawn from experiment
In a vacuum, the objects fall at the same rate independent of their respective masses. That means coin and feather both reach the ground at the same time in a vacuum. Larger objects experience more air resistance than smaller objects. Also, the faster an object falls, the more air resistance it encounters.
Note:
hope this helps
Based on the given reactants, what type of chemical reaction will take place?
Zn + 02 -
Answer:Classify each of the following chemical reactions.
S + O2 → SO2
CaCl2 + 2AgNO3 → Ca(NO3)2 + 2AgCl
Zn + CuSO4 → Cu + ZnSO4
2Na2O → 4Na + O
Explanation:
synthesis and combustion
double replacement
single replacement
decomposition only
Ostriches don’t use their wings for flight, but they do use them for other functions, such as mating rituals and balance. Many ancestors of ostriches did fly. What can you conclude about ostrich behavior from this information? A. Ostriches inherited the genes for wings from their ancestors, even though the function of these structures changed. B. Ostriches developed mutations in their wings to willfully adapt to their current environment. C. Ostriches lack a close evolutionary relationship with these ancestral birds. D. In the near future, ostriches will have no wings because they have no need for them. Reset Next
Answer:
A. Ostriches inherited the genes for wings from their ancestors, even though the function of these structures changed.
Explanation:
What we can conclude from this behavior is that ostriches inherited the genes for wings from their ancestors even though the function of these structures have changed.
Instead of the wings becoming vestigial to non-usage, the ostriches simply adapted them for other purposes. Mutation allows for this change in functions of body parts of organisms to occur.calculate the mass of sodium trioxocarbonate(iv) produced by the complete decomposition of 16.8g of sodium hydrogen trioxocabonate(iv)
Answer:
question for you how does this app work old tell me
2 moles or 168 g of sodium hydrogen trioxocarbonate produce 106 g of sodium trioxocarbonate. Thus 16.8 g of sodium hydrogen trioxocarbonate will produce 10.6 g of sodium trioxocarbonate.
What is decomposition?Decomposition is a type of chemical change in which the a compound decompose or break into its constituent compounds or molecules.
The decomposition of sodium hydrogen trioxocarbonate is written as follows:
[tex]2NaHCO_{3} \rightarrow Na_{2} CO_{3} + H_{2}O +CO_{2}[/tex]
According to this equation 2 moles or 168 g of sodium hydrogen trioxocarbonate produce 106 g or one moles of sodium trioxocarbonate. Molar mass of sodium bicarbonate is 84 g thus 2 moles are 168 g.
Thus, the mass of sodium trioxocarbonate formed from 16.8 g of sodium hydrogen trioxocarbonate is calculated as follows:
mass of product = 16.8 × 106 /168 g
= 10.6 g.
Hence, Thus 16.8 g of sodium hydrogen trioxocarbonate will produce 10.6 g of sodium trioxocarbonate.
To find more about decomposition reactions, refer the link below:
https://brainly.com/question/8009068
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How many atoms are in 2.12 moles of C₂H₆
Answer:
1.28 x 10²⁴atoms
Explanation:
Given parameters:
Number of moles of C₂H₆ = 2.12moles
Unknown:
Number of atoms = ?
Solution:
A mole of a substance is used to quantity the number of atoms or other particles in a substance.
1 mole of a substance = 6.02 x 10²³ atoms
To solve this problem;
2.12 moles of the C₂H₆ will contain 2.12 x 6.02 x 10²³ atoms
= 1.28 x 10²⁴atoms
In the photo above what does the Frisbee represent? Explain why.
Name the change of state when a liquid becomes a gas
Answer: Evaporation
Explanation: the process of turning from liquid into vapor
decrease in vapour pressure will cause?
A. an increase in boiling point
B. a decrease in boiling point
C. no effect
Answer:
A. an increase in boiling point
Explanation:
A decrease in vapor pressure will cause an increase in the boiling point of a substance.
An increase in vapor pressure will decrease the boiling point.
Vapor pressure is a measure of the tendency of a liquid to change into gaseous form. The boiling point is the temperature at which the vapor pressure equals the atmospheric pressure. When vapor pressure reduces, there would be an elevation of the boiling point. This is why pressure cookers causes water to boil faster because they lower the boiling point.How are zinc and sodium alike?
A.they are both solids at room temperature.
B.they have the same hardness at room temperature.
C.they have the same boiling point.
D.they have the same color.
Answer: both are solid at room temperture
Explanation:
Answer:
A
Explanation:
Heat being transferred from a hot pan to our food while cooking is an example of... *
conduction
convection
radiation
transpiration
A.conduction i hope it helps
Answer:
conduction
Explanation:
Knowing the gravity on the moon is 1.6m/s what is your weight?
What is a metallic bonding? A) The chemical bonding that takes place between metal atoms when they share electrons. B) The chemical bonding that takes place between metat atoms when they transfer electrons. C) The chemical bonding that takes place from the attraction of metal atoms and the other elements. D) The chemical bonding that takes place from the attraction of metal atoms and the surrounding sea of electrons.
Answer:
D) The chemical bonding that takes place from the attraction of metal atoms and the surrounding sea of electrons.
Explanation:
TOOK THE TEST
the chemical bonding or connection that occurs when metal atoms share electrons
The correct answer is A
Why is chemical bonding significant, and what is it?Chemical bonds that hold molecules together also form temporary connections vital for life. Ionic, covalent, hydrogen, and London dispersion forces are examples of chemical bonding.
How are chemcial bonds created?An attraction between ions or atoms is referred to as a chemical bond. Atoms trade or exchange valence electrons to create bonds. To reach a complete outer energy level, which is the most stable configuration of electrons, atoms must form chemical bonds.
To know more about chemical bonding visit:
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30 POINTS!!!
A chemical reaction that has the general formula of AB + C –> CB + A is best classified as a ______
reaction.
A. Synthesis
B. Polymerization
C. Decomposition
D. Oxidation
E. Replacement
Answer:
E. Replacement
Explanation:
A chemical reaction that has the general formula of AB + C --> CB + A is best classified as a replacement.
Answer:
A chemical reaction that has the general formula of AB + C → CB + A is best classified as a reaction.
Explanation:
e- replacement
on edge
HELP ASAP PLEASE I'LL GIVE BRAINLIEST
Answer:
Radiowave,Microwave, Infared,UV,X-Ray, Gamma
radio,microwave, ultraviolet,x ray,gamma ray
Explanation:
I looked it up at a NASA link
Complete the sentence by using the drop-down menus
to choose the words that describe the image most
accurately
To make an omelet, first
the egg and then let
the insides slide
into the bowl.
Answer:
1st one: crack
2nd: carefully
Explanation:
Answer:
Crack and then carefully
Explanation:
I just did it in edgen 2020
