Answer:
yaeh
Explanation:
a)Ca(OH)
2
+CO
2
⟶CaCO
3
+H
2
O
No. of atoms:Ca−1;O−4;H−2;C−1
b)Zn+AgNO
3
⟶ZnNO
3
+Ag
No. of atoms:Zn−1;Ag−1;N−1;O−3.
_Al + _Fe(NO3)2 -->_Fe + __Al(NO3)3
HELP PLEASE ||Suppose you add water to a 6 g of sugar to make a solution with a concentration of 3 g/L. What is the total volume of the solution?
Answer:
2 L
Explanation:
Divide the mass by the concentration to find the volume.
(6 g)/(3g/L) = 2 L
According to the concept of solubility, in order to make solution of sugar the total volume of solution is 2 g/L.
What is solubility?Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
In order to calculate total volume of solution divide mass/ concentration that is 6/3=2 g/L.
Thus, the total volume of the solution is 2 g/L.
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Which of these results in kinetic energy of an object? position mchotion
Answer:
..... yep
Explanation:
tep no yep no hyshshshss
motion results in the kinetic energy of an object
What is the answer?
Answer:
Option A
Explanation:
The atomic number is the number of protons in the nucleus of an atom.
At what point is a base no longer added during a titration?
A. when the pH increases suddenly in the flask
B. when the phenolphthalein remains clear in the flask
C. before the solution in the flask reaches the equivalency point
D. before half of the base is completely drained from the burette
Answer:
when the pH increases suddenly in the flask
Explanation:
I think it's right. :)
When the pH increases suddenly in the flask at that point is a base no longer added during a titration.
What is titration?Titration is a typical quantitative chemical analysis procedure used in laboratories to quantify the concentration of a specified analyte. The titrant or titrator is a reagent that is produced as a standard solution with a known concentration as well as volume.
What is pH?The pH scale, which originally stood for "potential of hydrogen," is used to describe the acidity as well as basicity of aqueous solutions. The pH of acidic solutions is lower than that of basic as well as alkaline solutions.
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HELPPPP!!!
Which element has the greatest atomic size?
a) Francium
b) Hydrogen
c) Rubidium
d) Sodium
Answer:
A. Francium
Explanation:
I'm not for sure but I believe this is correct. Hope it helps:)
Calculate the change in heat (Q) that occurs when 7.58grams of steam at 101°C cools to liquid water at 40°C. (cp = 4.184 J/g°C)
Answer:
Q = 19065.4 J
Explanation:
Q₁ = the required energy for phase change of H₂O from vapor to liquid
Q₁ = mass of H₂O * heat of vaporization
Q₁ = 7.58 g * 2260 J/g
Q₁ = 17130.8 J
Q₂ = energy required to cool the water fro 101°C to 40°C
Q₂ = mass of H₂O * specific heat of H₂O * ΔT
Q₂ = 7.58 × (4.184 J/gC) × (101 - 40)
Q₂ = 1934.6 J
Q = Q₁ + Q₂
Q = (17130.8 + 1934.6) J
Q = 19065.4 J
What type of ion is responsible for activating the vesicles in the axon terminal
а
ОО
Magnesium
Rubidium
b
С
Calcium
d
8
Phosphorus
Fluorine
е
Answer:
Calcium ions
Explanation:
Calcium ions entering the cell initiate a signaling cascade that causes small membrane-bound vesicles, called synaptic vesicles, containing neurotransmitter molecules to fuse with the presynaptic membrane.
Explain why an organism dies if the respiratory and circulatory system 'paused' for a while.
Answer:
Without the respiratory system your blood would be useless. The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body
Explanation:
What is ∆G system for the system that is described by the following data?
∆H system= -232 kJ, T= 293 K, ∆S system= 195 J/K
∆G system= ∆H system - T∆S system
a. -289 kJ
b. -175 kJ
c. 256 kJ
d. 56,903 kJ
Answer:
it is a
watch for kJ vs J as the enthalpy is in kJ and entropy is in J
Explanation:
How is the periodic table organised?
The periodic table brings order to information about the chemical elements. The chemical elements are arranged in order of increasing atomic number. The horizontal rows are called periods and the vertical columns are called groups. Elements in the same group have similar chemical properties.
please help!! will give brainliest if u tell me how
Why does heat transfer from object to object?
Select one:
a.Heat transfers because of the temperature differences between objects
b.Heat transfers because of the mass difference between objects
c.Heat does not transfer between objects
d.Heat is energy so it moves
5. Keratin and collagen are examples of *
li
Answer:
Structural proteins
Explanation:
Glad I could Help Pls Brainliest
Please help Me I really need it
Find the molar mass of CaCO3
Answer:
molar mass of caco3 is
100.0869 g/ mol
In a warehouse, the workers sometimes slide boxes along the floor to move them. Two boxes were sliding toward each other and crashed. The crash caused both boxes to change speed. Based on the information in the diagram, which statement is correct? In your answer, explain what the forces were like and why the boxes changed speed.
Box 1 has more mass than Box 2.
Box 1 and Box 2 are the same mass.
Box 1 has less mass than Box 2.
Answer:
Box 1 and Box 2 are the same mass.
Explanation:
Because they both change speed due to having the same mass!
Hope this helps! :) BRAINLIEST PLZ
How much water is needed to prepare a .50 molal solution using 0.50 moles of sodium chloride??
The amount of water needed to prepare a 0.50 molal solution using 0.50 moles of sodium chloride is 1L.
How to calculate volume?The volume of a solution can be calculated using the following formula:
Volume = no of moles ÷ molarity
According to this question, 0.50 molal solution is used to prepare 0.50 moles of sodium chloride. The volume of the solution is calculated as follows:
Volume = 0.50 moles ÷ 0.5M
Volume = 1L
Therefore, the amount of water needed to prepare a 0.50 molal solution using 0.50 moles of sodium chloride is 1L.
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Describe the radial velocity curve. What is its shape? What is its amplitude? What is the orbital period?
Answer:
The radial velocity curve describes how fast a star is moving in its orbit around a center of mass ( m )
Curve amplitude : This is the maximum value of the radial velocity curve
Radial velocity shape ; The shape of Radial velocity curve is parabolic in nature
Orbital period : Orbital period is the time taken by the star to make one complete rotation in its orbit
Explanation:
The radial velocity curve describes how fast a star is moving in its orbit around a center of mass ( m ) while Curve amplitude is the maximum value of the radial velocity curve also The shape of Radial velocity curve is parabolic in nature. and Orbital period is the time taken by the star to make one complete rotation in its orbit
What happens to the sugar that plants make during photosynthesis?
문
F
It is recycled in the soil and through the roots so other consumers
can grow
It is released by the stoma in the leaves and made available to
other consumers
It is used for growth and maintenance of the plant and a small
amount is available to feed consumers.
None of the above
Answer:
glucose
Explanation:
plants use sunlight water and the gases in the air to make glucose which is aform of sugar
Miscible liquids that have different boiling points can be separated by _______.
A.filtration
B.distillation
C.chromotagraphy
D.evaporation
Please help it's due soon
Diamonds are one of the hardest materials known. Hardness is how resistant a material
is to being scratched by another material. If two samples of metal that appear identical
are scratched by a diamond, is that sufficient to determine that they are the same metal?
Why or why not?
HELP WITH THIS WORD PROBLEMStudents want to gather evidence for the claim that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction. They decide to react vinegar and baking soda in a sealed plastic bag. Which of the following would provide the evidence the students need?
The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.
Bubbles were produced during the reaction, which meant that a gas was being produced
.The plastic bag did not change in any way, indicating that it was not involved in the reaction.
The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.
Important question, please answer(worth 64 points.)
Balance this equation
___C8H18 + ____O2 ⇒ ___CO2 + ___H2O
Answer:
Is is talking about h20 water?
Explanation:
Answer:
2C8H18 + 25O2 ----> 16CO2 + 18H2O
Explanation:
Basically you can first list all your elements from your products and reactants:
C 8 x 2 C 1 x 16
H 18 x 2 H 2 x 18
O 2 x 25 O (2 x 18) + (2 x 16)
A teacher tells the student to dlaw the same wave with double the frequency, while keeping the amplitude the same. How would the student draw the new wave?
Answer:
A.
Explanation:
Frequency is how often one complete cycle or wave takes place. Amplitude is the height of the wave from the midpoint to the crest.
The new drawing should have twice as many waves in the same period of time, with the same height wave.
Answer:
A.)
Explanation:
Frequency is how often one complete cycle or wave takes place. Amplitude is the height of the wave from the midpoint to the crest.
The new drawing should have twice as many waves in the same period of time, with the same height wave.
Help please
what is the half-life of c-14 at 250g?
Answer:
5,730 years
hope im right
Explanation:
Its half-life is 5,730 years. How much of a 250g sample of carbon-14 will be left in 5,000 years?
Number 2 plssssssssssssssssssssssssssssssss
Answer:
Its located on North America
what is change in science
Answer:
Scientific change is: "Any change in the scientific mosaic, i.e. a transition from one accepted theory to another or from one employed method to another. "
Explanation:
Human body cells are made by doing what ?
Answer:
When cells become damaged or die the body makes new cells to replace them. This process is called cell division. One cell doubles by dividing into two. Two cells become four and so on.
Explanation:
Is the fractional distillation of liquefied air a physical or chemical change?
Answer:
Physical Chanhe is the answer : )
W + BgCz2 --> WCz + Bg
Balance this equation
Answer: W + BgCz2 arrow WCz + Bg
2 W + BgCz2 arrow 2 WCz + Bg
Explanation:
Cz has 2 so you balcne the other side of WCz.
Since you Balcanes the Cz you changed the W and you Balcanes the other W on the left side.