Answer: The volume decreases
Explanation:
Because 4C is a cold temperature and atoms inside the water start to move slowly and begins to cange into a solid formation.
The density of the water increases and it is maximum at 4 degrees Celsius.
What is Freezing Point ?The temperature at which the liquid and solid states of the substance are in equilibrium at atmospheric pressure .
freezing point of water is 0° Celsius or 32° Fahrenheit.
Though liquids expand on heating water does not expand between 0°C to 4°C instead it contracts as water has maximum density at 4°C.
Thus the option C is the right answer , The density of the water increases as water is heated from 0 degree Celsius to 4 degree Celsius
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What type of reaction is illustrated?
C + 2F2 → CF4
Answer:
Synthesis Reaction
Explanation:
An synthesis reaction is one in which two or more atoms/molecules react to create a different molecule. These reactions follow the general structure: A + B --> AB.
More specifically, this is an addition reaction. An addition reaction occurs when two or more atoms/molecules combine to create a larger molecule. In this case, carbon and fluorine react to form carbon tetrafluoride, a larger molecule consisting of all the reactants.
This is not a decomposition reaction because these reactions involve a molecule breaking down into atoms or simpler molecules. These reactions follow the general structure: AB --> A + B.
This is not a single-replacement reaction because these reactions involve atoms replacing atoms of a different element in a compound. These reactions follow the general structure: A + BX --> B + AX.
Key Concepts
Identify the choice that best completes the statement or answers the question.
13. Basalt is a gray or black igneous rock. Pilar uses an absolute dating method to study a sample of basalt. What will the method help her learn about the basalt sample?
F the age of the sample
G the composition of the sample
H the physical structure of the sample
I the geographic distribution of the sample
Answer:
Explanation:
Answer
It tells you what method she used and what she wanted to accomplish. She is using
an absolute dating method to study a sample of basalt
So the answer you should post is F. F and the quotation above say the same thing.
question 2
metallic magnesium reacts with steam to produce magnesium hydroxide and hydrogen gas.
a. if 24.3 g mg are heated with 12.0 g h20, identify the limiting reactant - magnesium or water (steam)?
Explanation:
[tex]molar \: mass(mg) = 24g. {mol}^{ - 1} mass = 24.3g \\ molar \: mass(h20) = 18g. {mol}^{ - 1} mass = 12g \\ n = \frac{mass}{molar \: mass} \\ n(mg) = 1.01mol wich \: is \: substance \: a\\ n(h2o) = 0.67mol \: which \: is \: substance \: b \\ \frac{ |n|a }{ |n|b } : \frac{a}{b} \\ \frac{1.01}{0.67}: \frac{1}{2} \\ 1.51 > 0.50 \\ therefore \: substnce \: b \: which \: is \: water \: steam \: is \: limiting \: reagent [/tex]
how many liters is 3.0 g of o2 gas
1 mole of any gas at standard temperature and pressure (273 K and 1 atm) occupies a volume of 22.4 L.
A gas occupies a volume of 140. mL at STP. What is the volume of the gas at 25°C and 3.00 atm
At STP
pressure is 1atmSo
Apply Boyles law
P1V1=P2V2140(3)=1V2420=V2V2=420mLTwo different shaped containers have the same pressure, temperature and volume. What else must be true?
Answer:
n, the number of moles of gas is the same
Explanation:
PV = n RT if P and V and T and R are the same , the n must be the same
n = numer of moles
What is the number of electrons shared in the multiple carbon carbon.
Answer:
a single bond will share 2 electrons
double will share 4
so triple will share 6
True or false: in an ionic bond, the difference in electronegativities between the two bonding
atoms is greater than the difference in a covalent bond.
Answer:
its true hope this helped :)
what is the molar mass of H,S
Answer:
the answer to your question is 1.00784 u
molar mass of H₂S
= 2.Ar H + 1.Ar S
= 2. 1,00784 u + 1. 32,065 u
= 34.08068 u
Which elements will form a cation?
Oxygen
Helium
Magnesium
Sulfur
Answer:
Magnesium
Explanation:
Magnesium is a metalMetals have tendency to give up the electrons of the outermost shell and forms cation.[tex]Mg \longrightarrow Mg^{2+} + 2e^-[/tex]Acids are released and food is mixed and mashed into a soupy sludge in the ___________.
Answer: Is it multiple choice? The answer should be stomach.
Explanation:
Answer:
Blank = Stomach
The stomach mixes food with acids to create chyme, a, "soup" that helps digestive enzymes complete their work.
What is the pH of a solution if the pOH is 7.09?
Answer:
pH = 6.91
Explanation:
Recall that at 25 °C, we have the relationship:
[tex]\displaystyle \text{pH} + \text{pOH} = 14.00[/tex]
Therefore, the pH of a solution with a pOH of 7.09 is:
[tex]\displaystyle \begin{aligned} \text{pH} + (7.09) & = 14.00 \\ \\ \text{pH} & = 6.91 \end{aligned}[/tex]
Organic compounds form the basis of?
A Carbon
B Life
C Water
Answer:
A Carbon
Explanation:
True or False? Mask mandates have been lifted on all college campuses. True False
Answer:
False
Explanation:
Which of the following ions is formed when the positive hydrogen ions from an acid bond to water molecules?
H−
OH−
H2O+
H3O+
Answer:
H20 +
Explanation:
The ion that is formed when the positive hydrogen ions from an acid bond to water molecules is H₂O⁺. The correct option is C.
What are hydrogen ions?
Hydrogen is an element that is present in the first place on the periodic table, and its atom's number is 1. The nucleus of hydrogen contains only one electron, and it contains a positive 1 charge.
Hydrogen is called hydrogen ion when it participates in any chemical reactions. They become charged and participate in electron bonding to form compounds.
The positive Hydrogen ions, when forming a bond to water molecules, will be represented as H₂O⁺ because hydrogen only contains a positive charge on it. The unit positive charge on the hydrogen is the proton present in its nucleus.
Thus, the correct option is C. H₂O⁺
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a common chemicals used as a rising agent
is baking soda. it's chemical name is sodium
bicarbonate. it has a formula of NaHCO3.
what is the molar mass of sodium
bicarbonate?
A. Match the term with its definition. (1 point)
A. Frequency
B. Wavelength
C. Velocity
_____ The direction and speed at which a wave is traveling
_____ The distance between two adjacent wave peaks
_____ The number of waves passing a point in 1 second
B. What is the equation that illustrates the relationship between wave velocity, frequency, and wavelength? (1 point)
Taking into account the definition of wavelength, frecuency and propagation speed:
Frequency: The number of waves passing a point in 1 second.Wavelength: The distance between two adjacent wave peaks.Velocity: The direction and speed at which a wave is traveling.The equation that illustrates the relationship between wave velocity, frequency, and wavelength is v = f×λ.
WavelengthWavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).
FrequencyOn the other side, frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).
Propagation speed or velocityFinally, the propagation speed is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave disturbance propagates along its displacement.
The propagation speed relate the wavelength (λ) and the frequency (f) inversely proportional using the following equation:
v = f×λ
All electromagnetic waves propagate in a vacuum at a constant speed of 2,998 x 10⁸ m / s, the speed of light.
Therefore, the previous expression establishes an inversely proportional relationship between the frequency and the wavelength: The higher the frequency, the lower the wavelength and when the frequency is lower, the greater the wavelength.
SummaryIn summary, the definition of frequency, wavelength and velocity are:
Frequency: The number of waves passing a point in 1 second.Wavelength: The distance between two adjacent wave peaks.Velocity: The direction and speed at which a wave is traveling.Finally, the equation that illustrates the relationship between wave velocity, frequency, and wavelength is v = f×λ.
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PLEASE HELP DUE IN 10 MINUTES In your own words, how does photosynthesis work?
Answer:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil
what is the molarity of liters of an aqueous solution that contains 0.50 mole of potassium iodide, KI
Answer:
The molarity of 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide is 0.25M.HOW TO CALCULATE MOLARITY:The molarity of a solution can be calculated by dividing the number of moles by its volume. That is;Molarity = no. of moles ÷ volumeAccording to this question, 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide. The molarity is calculated as follows:Molarity = 0.50mol ÷ 2LMolarity = 0.25MTherefore, the molarity of 2.0 liters of an aqueous solution that contains 0.50 mol of potassium iodide is 0.25M.Learn more about molarity at: brainly.com/question/2817451
Explanation:
Mark me brainliest please!!! I spent a lot of time on this!!
NEED HELP ASAP!
What is the wavelength of a wave that has a frequency of 6.1 x 10^9 Hz? Remember that c = 2.998 x 10^8 m/s.
A.) 52m
B.) 5.2m
C.) 0.49m
D.) 0.049m
Answer:
speed = wavelength × frequency
wavelength = Speed/frequency
wavelength = 2.998 x 10^8 m/s ÷ 6.1 x 10^9 Hz
wavelength = 0.049m
Calculate the number of joules released when 75.0 grams of water are cooled from
100.0°C to 27.5°C
Answer:
-22750.5J or -2.28× 10⁴J
Explanation:
q=(75.0g)(4.184J)(27.5°C-100.0°C)
q= -22750.5J
q= -2.28× 10⁴J
How can these objects all weigh the same but be different sizes?
What weight (in grams) of h2so4 would be needed to make 750.0 ml of 2.00 m solution?
Answer:
I think the answer should be 147
Explanation:
A telescope would be MOST useful in answering which question? . O How do rockets move in space? What shape is a human skin cell? O What is on the surface of the Moon? O How do worms breathe underground?
Answer:
what is on the surface of the moon.
Explanation:
14
Select the correct answer.
The perihelion is the point at which Earth is closest to the Sun, and the aphelion is the point at which Earth is farthest away. Based on this
information, which statement is true?
O A. Earth moves faster along its orbit during perihelion because of the Sun's gravitational force.
O B. Perihelion marks the beginning of summer, when Earth is closest to the Sun.
• C
The longest day of the year occurs during perihelion due to a lunar eclipse.
© D. The Moon rotates faster during perihelion because of Earth's gravitational force.
Answer: B
Explanation: I know
Everything in the world is made of matter except you??
TrueFalse
Answer:
False.
Explanation:
Humans are made of matter too :)
Based on log rules and the way ph is calculated, what is the difference in [oh– ] concentration between point a and point b. 101 105 106 107
Based on their pOH values, the difference in [OH– ] concentration between point A and point B is 10^6.
What is pH of a substance?The pH is determined by the concentration of Hydrogen ions [H+]. The higher the concentration of H+ ions, the lower the pH of a substance. If the concentration of H+ is greater than OH-, the material is acidic, i.e. the pH value is less than 7
In this case, the formula for this will be:
[tex]pH= -log[H+][/tex]
So we have:
[tex][OH]= 14-1= 10^{-13}\\[OH] = 14-7=10^{-7}[/tex]
Therefore, the difference in [OH– ] concentration between point A and point B is 10^6.
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Answer: 10^6
Explanation: edge2023
If 20 mL of gas is subjected to a temperature change from 10°C to 100°C and a pressure change from 1 atm to 10 atm,
the new volume to the correct number of significant digits is:
O 3 ml
O 12mL
O 24 ml
O 13 ml
O none of these choices
Answer:
E. None of these
Explanation:
We know, By GAS laws,
PV = NRT, where p- pressure, v- volume, n- number of moles, R- gas constant ,and T- temperature
Now, In the question, the number of moles remains the same as the gas is the same. so n is constant so we can compare n before and after a temperature change.
[tex]\frac{P1V1}{RT1}[/tex] = [tex]\frac{P2V2}{RT2}[/tex]
where P1= 1 atm, P2 = 10 atm, V1= 20 mL, T1= 10°C and T2= 100°C
We don't have to worry about the standard units as they are present equally on both the sides and get cut, same goes for R( gas constant)
So putting values, we get
[tex]\frac{1*20}{R*10} = \frac{10*V2}{R*100}[/tex]
Cutting, R on both sides and moving contents to the right so that only V2 is left on the left.
[tex]\frac{1*20*100}{10*10} = V2[/tex]
∴ V2 = [tex]\frac{2000}{100}[/tex]
∴ V2 = 20mL
What would the total surface area be if our large cube were divided into 8000 cubes with each side having a length of 1 cm?
48,000 cm2
8000 cm2
36,000 cm2
96 cm2
Answer:
48 000 cm^2
Explanation:
8000 1cm cubes
each 1 cm cube side is 1 cm^2 and there are six sides to the cube , so each cube has 6 cm^2 surface area
and there are 8000 of them 8000 * 6 cm^2 = 48 000 cm^2
Which of the following happens when a reaction reaches dynamic equilibrium in a closed system?
A) The concentrations of the reactants and products increase.
B) The concentrations of the reactants and products remain constant
C) The rate of the forward reaction is faster than the rate of the reverse reaction.
D) The rate of the forward reaction is slower than the rate of the reverse reaction
Answer: B
Explanation:
At equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction, and thus the concentrations of the reactants and products must be constant.
