Answer:
22.6
Explanation:
I know answer is correct, I got the exact same question :)
The table shows the speed of sound in four substances.
Answer:
15 degree's
Explanation:
it is when sound travels at its lowest
How many moles are there in 122 grams of NO2?
Answer:
1.47 × 10^(23) molecules
Explanation:
When an atom of calcium (Ca) forms an ion by losing two electrons, what is the ion’s type and charge?
cation, 2+
anion, 2−
cation, 2−
anion, 2+
Answer: it would be cation, 2+
Explanation: electrons are negatively charged by 1. So if you get rid of 2 electrons it would be positive and cation is used to represent positive ions.
The electrical charge of the calcium ion is +2.
1. If I add together water and an effervescent tablet, will
the total mass before mixing be less than, equal to, or
greater than the mass after mixing?
I need help on 6 PLEASE!!
Answer:
A) 1 and 2
Explanation:
First law of Thermodynamics
The first law of Thermodynamics usually applies to situations where?
A : Thermal Energy is converted to Mechanical Energy
B : Chemical Energy is converted to electrical energy
C : Light energy is converted to sound Energy
D : Nuclear energy is converted to sound energy
Answer:
Thermal energy is taken from heat sink in higher temperature. A thermal power machine does mechanical energy using part of the heat.
Part of heat taken are given in cold reservoir in lower temperature
Explanation:
Please help me with number 4 and 5 please
Brainliest !!!!!!!!!!!!!!!!!!!! Soil erosion is the process by which soil is formed
True or false
Which type of reaction is NaCI + AgNO3 -----> NaNO3 + AgCI
A Synthesis
B Decomposition
C Oxidation
D Replacement
Answer:
D. Replacement
Explanation:
The positive ions on each compound are being replaced by the other, so therefore it is Replacement. It is also double replacement.
HELP QUICKLY PLEASE!!! Thermal energy is transferred from a hot object to a colder object by means of ___
a. heat
b. energy
c. work
d. temperature
e. none of the above
Answer:
Heat is the transfer of energy
Explanation:
Heat refers to the energy transferred from a hotter object to a cooler one. Heat is transferred in three ways: radiation, conduction, and convection. Radiation is the direct transfer of energy. The direct transfer of heat from one substance to another substance that it is touching is called conduction.
A stone has a mass of 112.5g. When the stone is totally immersed in a measuring cylinder containing water the displaced water moves from 50cm3 to 95cm^3. Find the density of the stone.
Answer:
Mass of the stone=112.5g
Volume of stone=95cm3-50cm3=45cm3
Explanation:
Which statement about covalent bonds and electrons is true?
O A. All covalent bonds are the same.
B. The atom with more electronegativity takes less than its share of
the electrons.
C. Electrons in covalent bonds are always shared equally,
D. If an atom gains an electron, it becomes more negative.
Answer:
D
Explanation:
electrons have a negative charge. gaining electrons increases the negative charge.
Which of the following indicates that a chemical change has happened during cooking?
The food darkens.
Bubbles form in boiling water.
Energy is transferred from the stove to a pan.
Butter melts.
Answer:
The food darkens.
Explanation:
predict how the surface of a sand dune would change if a river began flowing through the area over the course of 10,000 years. Write your explanation in the space
below.
Answer:
the sand dune would become flattened and eventually turn into sedementary rock
plz help this was due yesterday butttttt i didn’t want to do it...
Answer:
It is the same it has cycles related to it (that's what I could think of)
The maps above show a front as it moves east across the United States. Which of these describes the weather change that can be expected for Amarillo, Texas?
A. The cold front will bring cooler temperatures and snow because the cold front is producing large amounts of energy and snow moving southeast.
B. The warm front will bring warmer temperatures with hot air for several days because it pushes the cold air out of the way.
C. The warm front will bring warmer temperatures with light rain for a few days because the warm air rises and cools producing rain.
D. The cold front will bring cooler temperatures with thunderstorms and rain, which causes the moisture in the warm air to condense and release large amounts of energy.
Answer:
D
Explanation:
SCIENCE Which best describes a difference between single-celled organisms and multicellular organisms?
A.
Single-celled organisms are simple, while multicellular organisms are complex.
B.
Single-celled organisms have many functions, while multicellular organisms have one function.
C.
Single-celled organisms can live without water, while multicellular organisms cannot live without water.
D.
Single-celled organisms can only be found in one specific environment, while multicellular organisms can be found anywhere on Earth.
Answer:
A.
Single-celled organisms are simple, while multicellular organisms are complex.
so guys, on tt i posted a video of me dancing and doing tricks, and someone said its from yt. like no? I gave proof two times and I cant rn bc im in school ?? what should i do dont rpeort pls i need help
Just ignore them you dont need to send salty ppl proof of anything
how many electrons does Helium need to have a full outer shell
Answer:
two electrons is the answer.
A sample of a gas at 25°C has a volume of 150 mL when its pressure is 0.947 atm. What will the temperature of the gas be at a pressure of
0.987 atm and the volume changes to 144mL?
Be sure to show all of your work, define variables, show equation and substitute variables. Report you answer in Celcius.
Answer: The temperature of the gas at a pressure of 0.987 atm and volume of 144mL is [tex]25.16^0C[/tex]
Explanation:
The combined gas equation is,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 0.947 atm
[tex]P_2[/tex] = final pressure of gas = 0.987 atm
[tex]V_1[/tex] = initial volume of gas = 150 ml
[tex]V_2[/tex] = final volume of gas = 144 ml
[tex]T_1[/tex] = initial temperature of gas = [tex]25^0C=(25+273.15)K=298.15K[/tex]
[tex]T_2[/tex] = final temperature of gas = ?
Now put all the given values in the above equation, we get:
[tex]\frac{0.947\times 150}{298.15}=\frac{0.987\times 144}{T_2}[/tex]
[tex]T_2=298.31K=(298.31-273.15)^0C=25.16^0C[/tex]
The temperature of the gas at a pressure of 0.987 atm and volume of 144mL is [tex]25.16^0C[/tex]
answer this question pleas
Answer:nope
Explanation:
Just no
Compare the life cycles of a flowering and a conifer non-flowering plant.
Answer:
The main difference between flowering and nonflowering plants is their method of reproduction. Flowering plants rely on pollination for reproduction, where as nonflowering plants rely on dispersion to continue their life cycle.
Choose ALL that apply for NEAP tides Moon and Sun are at right angles to the Earth gravity of the Sun and Moon work against each other Moon, Sun, and Earth are in alignment smaller than normal range of highs and low tides
Answer:
i think it is..... smaller than normal range of highs and low tides
Moon and Sun are at right angles to the Earth
Explanation:
Moon and Sun are at right angles to the Earth and gravity of the Sun and Moon work against is the right statement about NEAP tides.
What are tides?Tides are the cyclic deformation of water body occur due to external gravitational force.
NEAP tides are also known as small tides as their heights are not very much and this is occur due to opposite attraction of water towards the gravity of the sun and moon. As sun and moon are present in the right angle direction with respect to the earth.
Hence, option (1) & (2) is correct, i.e. gravity of sun and moon is opposite and they are present at the right angle to the earth.
To know more about tides, visit the below link:
https://brainly.com/question/11545040
help help pleaseeeee
Cecilia is combing her hair. She notices that her hair and the comb have developed an electric charge. What will happen when she holds the comb near a small, uncharged object?
Answer:
The object will become statically charged
Explanation:
Which organelle allows plants to make their own food?
A: Chloroplast
B: Vacuole
C: Cell wall
D:
Cell membrane
Help me ASAP
Answer:
chloroplast is the correct answer
I have a solution with a molarity of 5.5M and a volume of
20L, how many moles of solute are present?
Answer:
110moles
Explanation:
Molarity, which refers to the molar concentration, can be calculated using the following formula:
Molarity (M) = number of moles (n) ÷ volume (V)
n = molarity × volume
According to the provided information in this question, a solution with a molarity of 5.5M and a volume of 20L is involved.
n = 5.5M × 20L
n = 110moles
110moles of solute are present.
Calculate the number of grams Fe2O3 produced from 8.93 g 02.
4 Fe +302 → 2 Fe2O3
Hey there!:
Molar mass :
Fe₂O₃ = 159.69 g/mol
O₂ = 31.99 g/mol
By reaction stochiometry :
4 Fe + 3 O₂ = 2 Fe₂O₃
3 * (31.99 g O₂ ) ------------------ 2 * ( 159.69 ) g Fe₂O₃
8.93 g O₂ --------------------------- ( mass O₂)
mass O₂ = ( 8.93 * 2 * 159.69 ) / ( 3 * 31.99 )
mass O₂ = 2852.0634 / 95.97
mass O₂ = 29.71 g Of Fe₂O₃
Hope this helps!
What is the molarity of a solution when 285 grams of HCl are dissolved in 0.350L of solution?
Answer: 22.33 M
Explanation:
molarity = moles of solute/liters of solution or [tex]M=\frac{mol}{L}[/tex]
first we have to find our moles of solute (mol), which you can find by dividing the mass of solute by molar mass of solute
mass of solute: 285 g
molar mass of solute: 36.46 g/mol
let's plug it in:
[tex]\frac{285g}{36.46 g/mol} = 7.817 mol[/tex]
next, we plug it into our original equation:
[tex]\frac{7.817 mol}{0.350 L} = 22.33 M[/tex]
Clear sele 4. Which of the following statements is (are) true about antibiotic - resistant bacteria. (Click all that apply) A. Antibiotic resistance can sometimes be shared among bacteria. B. Mutation can cause antibiotic resistance, C. Bacteria that become resistant are an example of evolution D. Antibiotics killing bacteria while allowing mutated bacteria to live is an example natural selection. 5. Identitfy ONE difference between kingdoms Archaea and Bacteria.
Answer:
A. Antibiotic resistance can sometimes be shared among bacteria.
B. Mutation can cause antibiotic resistance.
D. Antibiotics killing bacteria while allowing mutated bacteria to live is an example natural selection.
Explanation:
Identifying: Archaea have cell walls that lack peptidoglycan and have membranes that enclose lipids with hydrocarbons rather than fatty acids (not a bilayer). ... Bacteria: cell membrane contains ester bonds; cell wall made of peptidoglycan; have only one RNA polymerase; react to antibiotics in a different way than archea do.
Hope this helps, I reported some answer that was absurd, not applicable, incomplete and confusing
Mutation can cause antibiotic resistance, Bacteria that become resistant are an example of evolution. Antibiotics killing bacteria while allowing mutated bacteria to live is an example natural selection The correct options are B, D, and C.
What are archaebacteria and bacteria?Archaea, like bacteria, lack interior membranes but have a cell wall and swim with flagella.
Archaea differ from bacteria in that their cell wall lacks peptidoglycan and their cell membrane contains ether linked lipids rather than ester linked lipids.
The dispersion of antibiotic resistance in pathogenic bacteria is a simple and elegant example of natural selection at work.
Bacteria can develop antibiotic resistance through mutations that alter antibiotic cellular targets or by acquiring dedicated resistance genes from other bacteria.
Antibiotic resistance can be caused by mutation; bacteria that become resistant are an example of evolution. Natural selection is demonstrated by antibiotics killing bacteria while allowing mutated bacteria to live.
Thus, B, D, and C are correct options.
For more details regarding archaebacteria, visit:
https://brainly.com/question/2598723
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