Answer:
6.132
Explanation:
which of the following would remain a liquid longest as the temperature continues to drop? propane, octane, hexane, ethane
Which term goes hand in hand with biodiversity?
(A.) sustainability
(B.) competition
(C.) survival
(D.) homeostasis
Select whether the statement is for Speed, Velocity, or Acceleration.
The earth travels at 30 kilometers per second.
Velocity
Speed
Acceleration
Answer:
I think that the statement is relative to speed because it is saying km per second.
Answer:
Speed
Explanation:
A gas bubble occupies 14.0 mL, what is this volume into L?
give a reason why it is not advisable to heat magnesium before heating ammonium nitrate
Answer:
it can result in an increasing risk of the accumulation of decomposition products, self-heating (from the heat released by the slow decomposition reactions)
Magnesium can result in an increased risk of the accumulation of decomposition products, self-heating (from the heat released by the slow decomposition reactions)
What is ammonium nitrate?Ammonium nitrate is used commonly in fertilizers; in pyrotechniques, herbicides, and insecticides; and in the manufacture of nitrous oxide.
When ammonium nitrate is heated, it decomposes exothermically into nitrous oxide and water.
Hence, Magnesium can result in an increased risk of the accumulation of decomposition products, self-heating (from the heat released by the slow decomposition reactions)
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what type of wave moves the particles parallel to the motion of the wave
a.electromagnetic
b. longitudinal
c. transverse
d.water
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bit.[tex]^{}[/tex]ly/3a8Nt8n
___ act as an energy source? (From work bank)
Explanation:
bit.^{}
ly/3a8Nt8n
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pls help me answer this!
Answer:
neutrons is metal.......
Write two paragraphs about what would happen if your whole body was put in a low pressure environment ?
Answer:
Reduced air pressure also has a serious effect on the human body. Reduced air pressure means that there is less oxygen available to the body. For lungs to inflate, the air pressure in your lungs has to be less than the air outside the lungs. This is because air moves from high-pressure areas to low-pressure areas.
Explanation:
Reduced air pressure also has a serious effect on the human body. Reduced air pressure means that there is less oxygen available to the body. For lungs to inflate, the air pressure in your lungs has to be less than the air outside the lungs. This is because air moves from high-pressure areas to low-pressure areas.
Drag and drop the labels provided into the boxes below to explain how the Earth-Sun-Moon system results in these seasons on Earth.
How are molecules, compounds, and substances related?
Answer:
Molecule is the general term used to describe any atoms that are connected by chemical bonds. Every combination of atoms is a molecule. A compound is a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds.
Explanation:
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The molar mass of element X is 42.3 grams per mol and the molar mass for
element Y is Y 96.7 grams per mol. What is the empirical formula for a substance
containing a mass composition of 52.2% X and the remainder Y?
Answer:
X5Y2
Explanation:
% composition of X = 52.2%
% composition of Y = (100 - 52.2) = 47.8%
This means that there are 52.2g of X and 47.8g of Y in the compound
To calculate the empirical formula of the compound, we first convert the gram value to mole value by dividing by their molar masses.
X = 52.2g/42.3g/mol = 1.234mol
Y = 47.8g/96.7g/mol = 0.494mol
Next, we divide each mole value by the smallest value (0.494mol)
X = 1.234mol ÷ 0.494mol = 2.49
Y = 0.494mol ÷ 0.494mol = 1
We multiply each value by 2
X = 2.49 × 2 = 4.98
Y = 1 × 2 = 2
The simple ratio of X:Y is 5:2, hence, their empirical formula is X5Y2.
A chef uses a large aluminum spoon with a mass of 38.0 g to stir a pot of boiling water. As a result, the spoon’s temperature increases by 3.60°C. Consider that the specific heat capacity of aluminum is 0.90 J/g–°C. How much heat has the spoon absorbed? For credit, you must show all steps of your calculations.
Answer:
12,312 J or 0.12312 kJ
Explanation:
q = mCT
q = J of heat
m = mass
C = heat capacity
T = temp change
q = 38 x 0.90 x 3.6
q = 12312 J
q = 0.12312 kJ
At a fixed pressure, if the temperature is doubled, the volume of a gas will be
Answer:
Doubled.
Explanation:
The relationship between the temperature and the volume of a gas at a constant pressure can be described using Charles' law:
V₁*T₂ = V₂*T₁That means that the temperature and the volume of a gas are directly proportional: The higher the temperature, the higher the pressure. If one of those factors is increased twofold, the other one will be increased twofold as well.
3. The hydroxide-ion, [OH-], concentration in a detergent solution is 1.0 x 10-3 M. What is [H+] concentration in the detergent solution?
A) 1.0 x 10^-11 M.
B) 1.0 x 10^-9 M.
C) 1.0 M
D) 0.001 M
Answer:
c
Explanation:
h
You place a balloon in a closed chamber at standard temperature and pressure (STP). You triple the chamber pressure.
What happens to the balloon?
The volume stays the same.
The volume increases to three times its original volume.
The temperature must also change for the volume to change.
The volume decreases to one-third of its original volume.
Answer:
it pops?
Explanation:
Hydrogen is an element.
True
False
Answer:
True
Explanation:
Hydrogen is one of the most abundant elements in the universe so yes
Answer:
true
Explanation:
Hydrogen is an chemical element
For a reaction to be in equilibrium.... *
A. concentration of reactants and products remain constant
B. concentration of reactants and products must be the same
C. the rate of forward reaction is not equal to the rate of backward reaction.
Answer: C) the rate of forward reaction is not equal to the rate of backward reaction. This should be the answer.
Explanation:
What does it mean for heat to be transferred by radiation?
A. Energy is transferred through converting bond energy to kinetic
energy
B. Energy is transferred when one molecule collides with another.
C. Energy is transferred when molecules absorb electromagnetic
waves.
D. Energy is transferred through moving currents of warmer air or
liquid.
SUBMIT
Answer:
C.
Explanation:
Heat transfer by thermal radiation is transfer of heat by electromagnetic wav
The meaning for heat to be transferred by radiation is energy is transferred when molecules absorb electromagnetic waves.
What are electromagnetic waves?Electromagnetic waves are the waves of electromagnetic field. Examples are radio waves, x-rays, and gamma rays.
These waves carry through space with carrying electromagnetic radiations.
Thus, the correct option is C. Energy is transferred when molecules absorb electromagnetic waves.
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pls help will give brainliest
the outermost "layer..............
Answer:
Thin
Explanation:
Dry, hard rock from deep within the earth reacts with water and oxygen on the surface and creates new kinds of minerals
what is elastic energy
Answer:Elastic energy is energy stored in an object for temporary strain. It is basically potential energy.
How many grams of Carbon Dioxide can be produced by the complete combustion of 140.0 grams of propene; C3H6? If the actual yield turns out to be 200.0 grams of carbon dioxide, what is the percent yield?
Answer:
2 C3H6 + 9 O2 6 H2O + 6 CO2
Theo. yield is 440.0 g CO2, % yield = 45.45% Explanation: hope it helps here for ur service
439.16 g of carbon dioxide is produced by complete combustion of 140 g of propene. The percent yield is 45.54%.
What is combustion?Combustion is defined as a high temperature exothermic reaction between a fuel which acts as a reductant and an oxidant which is usually atmospheric oxygen.It does not result in fire as the flame is visible only when substance which undergoes combustion vaporizes.
For combustion reactions to take place stoichiometry is followed according to which mass of reactants or products obtained or required is calculated.
2 C₃H₆ + 9 O₂ [tex]\rightarrow[/tex] 6 CO₂ + 6 H₂O
Here 2 molecules of propene react to give 6 molecules of carbon dioxide.
∴ for 140 grams of propene 140×264/84.16=439.16 g of molecules of CO₂ are produced.
Percent yield is calculated by dividing observed yield by theoretical yield which gives 45.54% according to this example.
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1) Calcula la masa molecular para las siguientes sustancias
f) Mg3(PO4)2
g) Cu(NO2)3
h) C5H12
i) (NH4)4 As2O7
j) I2O7
2)Halla la composición porcentual de cada una de las siguientes sustancias
- H3PO4
• HIO3
• H2C2O4
• C3H6O3
• NH3
• KBr
Porfavor es para mañana mismo
Is hydrogen a metal or a nonmetal? How many valence electrons does a hydrogen atom have?
Answer:
hydrogen is a non-metal and it has 1 valence electron
Explanation:
You can find the valence electrons on the bottom left of your periodic table, it is under the atomic number. Hydrogen is a non-metal because hydrogen conducts heat and electricity poorly.
Is the kool-aid man the jar or the liquid?
I know that this is for school but like i need to know
Answer:
I think both
Explanation:
HI dissociates to form 12 and Hz: 2HI(g) → H2(g) + 12(9) If the concentration of Hl changes at a
rate of -0.45 mol L's? what is the rate of appearance of 12(g)?
Based on the rate of disappearance of HI, the rate of appearance of I₂ is 0.225 mol/L/s.
What is rate of reaction?
The rate of a reaction is the rate at which reactant molecules are converted to product or the rate at which product molecules are formed.
Rate of reaction = change in concentration of reactant or product/timeFrom the equation of the reaction, 2 moles of HI produces 1 mole of I₂.
The rate of disappearance of HI is -0.45 mol/L/s
The rate of appearance of I₂ will be 0.45/2 mol/L/s = 0.225 mol/L/s.
Therefore, the rate of appearance of I₂ is 0.225 mol/L/s.
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PLEASE HELP!!! Explain how the periodic table tells you about the atomic structure of an element. (this is for my physical science class)
Answer:
The number of outer shell electrons determines the group number of the element. The number of occupied principle quantum shells (energy levels) determines the period of the element. The proton number determines the element itself and its position.
Explanation:
Genetic material (_____) is passed from cell to cell.
Answer:
DNA
Explanation:
Genetic material DNA is passed from cell to cell.
What is DNA?DNA is Deoxyribonucleic acid. It is a polymer composed of two polynucleotide chains. These chains coil around each other to form a double helix. The polymer carries genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. It keeps on transferring from generation to generation. Two types of Nucleic acids are DNA and ribonucleic acid.
In DNA, 4 bases are present that are Adenine, Guanine, Cytosine and Thymine. Whereas Thymine is replaced by Uracil in case of RNA.
These bases are connected by hydrogen bonds with each other.
The configuration of the DNA molecule is highly stable, allowing it to act as a template for the replication of new DNA molecules, as well as for the production (transcription) of the related RNA (ribonucleic acid) molecule.
Therefore, Genetic material DNA is passed from cell to cell.
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This gland of the endocrine and digestive systems produces insulin to help control the body's sugar levels and enzymes which aid in digestion.
Answer:
Pancreas.
Explanation:
Living systems are self-organized life forms and are known to be very much interactive with their surroundings or environment. Also, living systems are dependent on the flow of information, matter and energy at various levels.
Some examples of living systems in organisms are respiratory system, nervous system, digestive system, and circulatory system.
Additionally, living systems comprises of the following components; cells, organs, muscle, tissues, blood, etc.
An endocrine system refers to a series of ductless glands and organs responsible for the production and secretion of hormones that are used by the body for the performance of various functions such as metabolism, controlling growth, reproduction, mood, sleep, etc. These hormones are secreted directly into the circulatory system (blood) and then transported to the organs and tissues in the body.
Pancreas is one of the glands of the endocrine and digestive systems that produces insulin to help control the body's sugar levels and enzymes which aid in digestion.
How can you figure out the properties of a star?
Answer:
Measuring distances to stars through stellar parallax. Measuring distances to stars through the moving cluster method. Astronomers measure the temperature of a star by looking at the star's color and its spectrum. The apparent brightness of a star tells how bright it seems to us
Explanation:
Answer:
Analyze the Characteristics of a Star
Explanation:
Surface Temperature
First, you want to determine the color of the star - this can determine the heat and age of the star.
Second, you want to measure the spectrum and get the spectral type.
Chemical Composition
Determine which lines are present in the spectrum.
Luminosity
Measure the apparent brightness and compensate for distance
Radical Velocity
Measure the Doppler shift in the spectrum.
Rotation
Measure the width of spectral lines.
Mass
Measure the period and radial velocity curves of spectroscopic binary stars.
Diameter
1. Measure the way a star’s light is blocked by the Moon.
2. Measure the light curves and Doppler shifts for eclipsing binary stars.