Answer:
I. hurricanes
Explanation:
Answer:
C
Explanation:
Reptiles generally pose some sort of natural bewilderment to most people.
The half life of carbon-14 is 5,730 years. ABOUT how old is a sample that has one-fourth of its carbon-14 unchanged?
a.10,000 years
b.15,100 years
c.11,400 years
d.5,700 years
Answer:
C. 11400 years.
Explanation:
The time constant of the isotope is:
[tex]\tau = \frac{5730\,yr}{\ln 2}[/tex]
[tex]\tau = 8266.643\,yr[/tex]
The decay of the isotope is described by the following model:
[tex]\frac{m(t)}{m_{o}} = e^{-\frac{t}{\tau} }[/tex]
[tex]-\frac{t}{\tau} = \ln \frac{m(t)}{m_{o}}[/tex]
[tex]t = -\tau \cdot \ln \frac{m(t)}{m_{o}}[/tex]
[tex]t = -(8266.643\,yr)\cdot \ln \left(\frac{1}{4} \right)[/tex]
[tex]t \approx 11460.001\,yr[/tex]
The right answer is C.
How many moles of magnesium oxide are produced when 7 moles of Mg are reacted ?
Moles are produced when there is magnesium Explanation:
A solution is prepared by mixing 38.0L of pyrimidine and 442.0L of water. What is the percent volume of pyrimidine in this solution?
Answer: 7.92%
Explanation:
I just answered the question and got it correct.
There is a golden role of solubility, polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, the percent volume of pyrimidine in this solution is 79.1%.
What is solution?Solutions are a homogeneous mixture of two or more substances. A solution is a homogeneous mixture of solvent and solute molecules. Solvent is a substance that is in large amount in solution. solute is the substance which is in small amount in a solution.
percent volume=(Volume of Solute/Volume of Solution)×100
Volume of Solute=38.0L
Volume of Solution= 442.0L + 38.0L=480L
substituting all the given values in the above equation, we get
percent volume=(38.0L/480L)×100
percent volume = 79.1%
Therefore, the percent volume of pyrimidine in this solution is 79.1%.
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How many miles of copper, Cu, are in 19.2g of copper
Consider the model of a sodium atom. An orange circle labeled upper N a is surrounded by three concentric circles. The innermost ring has dots at the north and south positions. The next ring has eight dots, evenly spaced, with dots aligning with those in the inner ring. The outermost ring has one dot at the north position. Which feature does the model show accurately?
A) the size of the electrons in different shells
B) the shapes of the orbitals in different shells
C)the distribution of electrons in different shells
D)the orientation of the orbitals in different shells
Answer:
C would be the answer.
Explanation:
Answer:
The answer is C. the distribution of electrons in different shells
Explanation:
I got it right on the test
The wavelength and energy of a wave are inversely proportional. Based on this, which wave listed would have the LOWEST energy.
A) wave with wavelength of 600 m
B) wave with wavelength of 600 cm
C) wave with wavelength of 600 mm
D) wave with wavelength of
Answer:it is a
Explanation:
Which element has the most protons:
Krypton
Argon
Nitrogen
Chlorine
The answer would be A) Kyrpton
---
Krypton has 36 protons.Argon has 18 protons.Nitrogen has 7 protons.Chlorine has 17 protons.After looking at all of these numbers we can see that the element with the highest number of protons is krypton, at 36 protons.
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What determines the color of a rock?
O texture
O grain pattern
O mineral type
O grain shape
The color of a rock is determined by the type of mineral it contains. The presence of certain elements and the way light interacts with these minerals can influence the color. While other factors like texture or grain pattern may affect appearance, they do not fundamentally determine the color.
Explanation:The color of a rock is primarily determined by its mineral type. Different minerals have different colors due to various factors like the way light reflects off their surfaces, their structure, and the presence of certain elements. For example, quartz can be clear or cloudy white, obsidian is a dark, glossy black, and amethyst, a type of quartz, is purple due to the presence of iron. While the texture, grain shape or pattern may affect the overall appearance of a rock, it's the mineral content that fundamentally determines its color.
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Magnesium reacts with hydrochloric acid (HCl) as follows. How many milliliters of hydrogen gas are produced by the reaction 0.020 mol of magnesium with excess of hydrochloric acid at STP? Make sure to use the correct number of significant digits. 0.448 mL 0.45 mL 448 mL 450 mL
Answer:
The answer IS NOT 448
it might be 0.448 but im not sure
Explanation:
i trusted the person above and it was incorrect so wanted to let yall know its not c
The greater the
of a gas at a given temperature, the smaller its volume.
The air helps regulate Earth's atmosphere so that
it is not too cold or too hot for life on Earth. The
air also protects organisms from the sun's
harmful radiation. These are reasons air is an
important resource. Which of these claims
provides a major reason that air is considered an
important natural resource?
Answer:
B
Explanation:
Which of these pumpkins has the most
thermal energy? Explain your answer.
Final answer:
The 3.5kg bowling ball rolling at 30m/s has a higher momentum than the 50kg student moving at 1.75m/s.
Explanation:
The momentum of an object is defined as the product of its mass and velocity. Therefore, to determine which object has a higher momentum, we need to calculate the momentum of each object. The momentum of an object can be calculated using the formula: momentum = mass * velocity.
For the 3.5kg bowling ball rolling at 30m/s, the momentum would be: momentum = 3.5kg * 30m/s = 105kg.m/s.
For the 50kg student moving at 1.75m/s, the momentum would be: momentum = 50kg * 1.75m/s = 87.5kg.m/s.
Comparing the two, we can see that the bowling ball has a higher momentum of 105kg.m/s, compared to the student's momentum of 87.5kg.m/s.
Objects that are able to fall have what type of energy?
a.) Kinetic
b.) Radiant
c.) Potential
d.) Electrical
Answer:
kinetic energy
Explanation:
because of the movement of gravity and space
Which of the following is used as a refrigerant?
methane
esters
freon
fluorine
Answer:
Freon
Explanation:
Answer:
Freon
Explanation:
Freon is used as a refrigerant.
How many grams of propane (C3H8) will react with 3.29 L of O2 at 1.05 atm and -34° C? (Balance & use this equation: __ C3H8 + __ O2 → __CO2 + __ H2O)
Answer:
1.55g of propane, C3H8
Explanation:
Step 1:
The balanced equation for the reaction. This is given below:
C3H8 +5O2 —> 3CO2 + 4H2O
Step 2:
Data obtained from the question. This include the following:
Volume (V) of O2 = 3.29L
Pressure (P) = 1.05 atm
Temperature (T) = –34°C = –34°C +273 = 239K
Number of mole O2 =...?
Gas constant (R) = 0.082atm.L/Kmol
Step 3:
Determination of the number of mole of O2 that reacted.
The number of mole of O2 that reacted can be obtained by using the ideal gas equation as follow:
PV = nRT
Divide both side by RT
n = PV /RT
n = (1.05 x 3.29)/(0.082 x239)
n = 0.176 mole
Therefore, 0.176 mole of O2 was used in the reaction.
Step 4:
Determination of the number of mole of C3H8 needed to react with 0.176 mole of O2.
This can be obtained as follow:
From the balanced equation above,
1 mole of C3H8 reacted with 5 moles of O2.
Therefore, Xmol of C3H8 will react with 0.176 mole of O2 i.e
Xmol of C3H8 = 0.176/5
Xmol of C3H8 = 0.0352 mole
Step 5:
Conversion of 0.0352 mole of C3H8 to grams.
This is illustrated below:
Mole of C3H8 = 0.0352 mole
Molar mass of C3H8 = (3x12) + (8x1) = 44g/mol
Mass of C3H8 =...?
Mass = mole x molar Mass
Mass of C3H8 = 0.0352 x 44
Mass of C3H8 = 1.55g.
Therefore, 1.55g of propane, C3H8 were used in the reaction.
Final answer:
To find out how many grams of propane will react with 3.29 L of O₂ at 1.05 atm and -34° C, we use the Ideal Gas Law to calculate moles of O₂ and then use the stoichiometry of the balanced combustion equation to determine the moles of propane. The final step is to convert the moles of propane to grams, resulting in 1.614 grams of propane required.
Explanation:
The balanced chemical equation for the complete combustion of propane (C₃H₈) is:
C₃H₈(g) + 5O₂(g) → 3CO₂(g) + 4H₂O(l)
Calculating Grams of Propane:
First, we need to use the Ideal Gas Law PV = nRT to determine the moles of O₂. Given that P = 1.05 atm, V = 3.29 L, R = 0.0821 L·atm/mol·K, and T = 239 K (-34 °C + 273 = 239 K), we can solve for n (the number of moles of O₂).
n = PV / RT
n = (1.05 atm * 3.29 L) / (0.0821 L·atm/mol·K * 239 K)
n = 0.183 moles of O₂
From the balanced equation, we see that 1 mole of C₃H₈ reacts with 5 moles of O₂. So, we need to find out how many moles of C₃H₈ will react with 0.183 moles of O₂ by dividing by the stoichiometric coefficient of O₂:
moles of C₃H₈ = 0.183 moles of O₂ / 5 = 0.0366 moles of C₃H₈
Now, we calculate the mass of propane by multiplying the moles of C₃H₈ by its molar mass (C₃H₈ = 44.09 g/mol):
mass of C₃H₈ = 0.0366 moles * 44.09 g/mol = 1.614 grams
Therefore, 1.614 grams of propane will react with 3.29 L of O₂ at 1.05 atm and -34° C.
The atomic number is the number of __________________in an atom.
neutrons
electrons
quarks
protons
Answer:
protons
Explanation:
The fishing techniques of bottom trawling and dredging involves dragging huge, heavy nets across the ocean floor. These techniques are more effective than traditional fishing techniques. However, the nets damage the ocean floor and fishing boats empty wastewater into the sea. Which adverse effects do bottom trawling and dredging have on the biodiversity of marine environments? Select all that apply.
Choose all that apply:
Overexploitation
Pollution
Overpopulation
Introduction of invasive species
Habitat destruction
Answer:
pollution and habitat destruction
Explanation:
Brainliest plzz. to help a sister out
What type of bond will form when P and O2 react?
P + O2 → P4O10
Answer:
The answer is covalent bonding.
Explanation:
When both non-metals react, they will form Covalent bond .
When metals react with non-metal, they form Ionic bond .
When phosphorus (P) reacts with oxygen (O2), they form covalent bonds to create phosphorus pentoxide (P4O10), a chemical bond formed by the sharing of electron pairs between atoms.
Explanation:When phosphorus (P) reacts with oxygen (O2), it forms a compound called phosphorus pentoxide (P4O10). The type of bond formed in this reaction is a covalent bond. A covalent bond is a chemical bond formed by the sharing of electron pairs between atoms. In this case, phosphorus and oxygen share electrons to achieve a stable electron configuration. Phosphorus needs 3 more electrons to complete its outer shell, while oxygen needs 2 more. So, they share electrons mutually to meet their requirements, forming covalent bonds.
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Which solution is the most concentrated
Answer:
The most concentrated solution is the one with the highest molarity. Molarity is calculated by taking the moles of solute/ liters of solution. The already gave you the molarity, so you do not need to calculate it. The most concentrated solution is the 0.25 M KCl.
Hope this helps!
question about corona
Answer:
public health
Answer: Clean water is important to (public health). Diseases can spread through cities due to unclean water.
Explanation: I hope this helps!
A 200.9-mL intravenous (IV) solution contains 5.10 g of glucose (C6H12O6). What is the molarity of this solution?
The molarity of the solution is approximately 0.141 M. To find the molarity of the solution, we first need to calculate the number of moles of glucose present in the solution using the given mass of glucose and its molar mass.
The molar mass of glucose (C6H12O6) can be calculated by adding the atomic masses of its constituent atoms:
[tex]\[ \text{Molar mass of glucose} = 6 \times \text{Atomic mass of C} + 12 \times \text{Atomic mass of H} + 6 \times \text{Atomic mass of O} \][/tex]
Using the atomic masses provided by the periodic table:
[tex]\[ \text{Molar mass of glucose} = 6 \times 12.01 \, \text{g/mol} + 12 \times 1.01 \, \text{g/mol} + 6 \times 16.00 \, \text{g/mol} \][/tex]
[tex]\[ = 72.06 \, \text{g/mol} + 12.12 \, \text{g/mol} + 96.00 \, \text{g/mol} \][/tex]
[tex]\[ = 180.18 \, \text{g/mol} \][/tex]
Now, we can calculate the number of moles of glucose using the given mass of glucose:
[tex]\[ \text{Number of moles of glucose} = \frac{\text{Mass of glucose}}{\text{Molar mass of glucose}} \][/tex]
[tex]\[ = \frac{5.10 \, \text{g}}{180.18 \, \text{g/mol}} \][/tex]
[tex]\[ \approx 0.0283 \, \text{mol} \][/tex]
Next, we calculate the volume of the solution in liters:
[tex]\[ \text{Volume of solution} = 200.9 \, \text{mL} \times \frac{1 \, \text{L}}{1000 \, \text{mL}} \][/tex]
[tex]\[ = 0.2009 \, \text{L} \][/tex]
Now, we can find the molarity of the solution using the formula:
[tex]\[ \text{Molarity} = \frac{\text{Number of moles of solute}}{\text{Volume of solution in liters}} \][/tex]
[tex]\[ = \frac{0.0283 \, \text{mol}}{0.2009 \, \text{L}} \][/tex]
[tex]\[ \approx 0.141 \, \text{M} \][/tex]
Therefore, the molarity of the solution is approximately 0.141 M.
Use the electron-dot notation to demonstrate the formation of an ionic compound involving the elements Al and S
Aluminum (Al) loses three electrons to form an Al³+ cation while sulfur (S) gains two electrons to form an S²- anion. These cations and anions combine in a 2:3 ratio to form the compound Al2S3.
Explanation:The electron-dot notation, also known as Lewis symbols, can be used to demonstrate the formation of an ionic compound involving the elements aluminum (Al) and sulfur (S). The aluminum atom loses three electrons to achieve a stable electron configuration, resulting in an aluminum cation with a charge of +3 (Al³+). On the other hand, sulfur gains two electrons to complete its octet, forming a sulfide anion with a charge of -2 (S²-). However, to balance the charges, we need two sulfide ions for every aluminum ion, leading to the formation of the compound Al2S3.
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Can i get 1-10 plzzzzzz
Answer:
For 1-7
Radio Waves
Microwaves
Infrared Waves
Visible Light Rays
Ultraviolet Waves
X-rays
Gamma Rays
And for 8-10
8. shorter
9.higher
10. longer
Answer:
Explanation:
1. Radio Waves
2. Microwaves
3. Infrared Waves
4.Visible Light Rays
5. Ultraviolet Waves
6. x-rays
7. Gamma Rays
8. shorter
9.higher
10. longer
Which of the following explains the process of radiation?
when heat gets transferred through objects that are touching
when the measurement of heat in the atmosphere goes down
when heat gets transferred through electromagnetic waves that move through
space
when heat gets transferred through a liquid or a gas
Answer:
RADIATION IS THE PROCESS WHERE HEAT IS TRANSFERRED THROUGH ELECTROMAGNETIC WAVES THAT MOVE THROUGH SPACE.
Explanation:
Radiation is the transfer of energy in the form of waves through space or a material medium. It involves the emission of energy through electromagnetic waves such as radio waves, x-rays, gamma rays. Also, particles such as electrons, protons and neutrons are regarded as radiations when they travel at high velocities. Radiation are categorized into two; ionizing and non-ionizing radiations depending on the energy the matter carries. In ionizing radiation, matters carry sufficient energy which can be used to ionize atoms or molecules and even break chemical bonds; charged particles or ions are therefore produced in matter and such radiations include gamma rays, x-rays, alpha particles, beta particles.
'B. When heat gets transferred through electromagnetic waves that move through space' explains the process of radiation.
Radiation is a method of heat transfer that does not require any medium. This means that heat energy can travel through the vacuum of space. The Sun warming the Earth is a perfect example of radiation. Here’s how it works step-by-step:
Emission of Electromagnetic Waves: A hot object, such as the Sun, emits electromagnetic waves, which may include infrared radiation, visible light, and others.
Travel Through Space: These electromagnetic waves travel through the vacuum of space; no particles are needed to carry this energy.
Absorption: When these waves reach another object, like Earth, they get absorbed by the object’s surface, warming it up.
Different types of electromagnetic waves include radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Each type carries energy and can transfer heat through radiation.
If the pH of the solution is 7.65, what is the concentration of hydronium ion [H3O+]?
Answer:
.000000022
Explanation:
H3O+=10^-pH
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What is a compound?
a combination of two or more substances that
are not chemically combined
O a combination of two or more elements that
are combined in a certain ratio
What is a solution?
a mixture of two or more substances that are
mixed evenly throughout
a mixture of two or more substances that are
chemically combined
DONE
Answer:
1) B 2) A
Explanation:
just did it on edg 2020
Which allele is recessive?
What is the molarity of a solution with 2.1 mol of HCl in 400 mL of water? (M = mol/L)
A.) 0.00525 M
B.) 5.25 M
C.) 190 M
D.) 2.1 M
Answer:
A
Explanation:
A. What is the solubility in grams for HCl at 40℃?
B. What is the temperature that 65g of NH4Cl reaches solubility?
C. What is the solubility in grams for SO2 at 20℃?
D. Which compound reaches a solubility of 40 g at a temperature of 100℃?
The term solubility has to do with the ability of a solute to dissolve in a solvent.
What is solubility?The term solubility has to do with the ability of a solute to dissolve in a solvent. The solubility of a solute can be obtained by reading of the solubility curve.
The answers to the questions are;
The solubility of HCl at 40° is 60 g/100g of waterThe solubility of SO2 at 20℃ is 10g/100g of waterThe compound that reaches a solubility of 40 g at 100℃ is NaCl.Learn more about solubility:https://brainly.com/question/13110055?
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Which diagram best illustrates the stage in the formation of the solar system at which the sun formed?
Answer:
A
Explanation:
Every thing was first a bunch of gas.