An object at rest has equal forces acting on it. This can be described as a __________ force.
What elements are in water?
1. Hydrogen and Helium
2. Hydrogen and Oxygen
3. Helium and Oxygen
4. Hydrogen and Nitrogen
Answer:
Hydrogen and Oxygen
Explanation:
The chemical equation for water is H20, meaning Hydrogen and 2 oxygen!
Convert 132°F to Celsius.
Answer:
the answer is 55 degrees Celsius
If an 85.0 mL container of helium gas at standard pressure is heated from 20 C to 91 C and the pressure is increased to 2.8 atm then what would the new volume be for the He gas?
Answer:
V₂ = 37.71 mL
Explanation:
Given data:
Initial volume = 85.0 mL
Initial pressure = 1 atm
Initial temperature = 20°C (20 +273 = 293 K)
Final temperature = 91°C (91+273 = 364 K)
Final volume = ?
Final pressure = 2.8 atm
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
V₂ = P₁V₁ T₂/ T₁ P₂
V₂ = 1 atm× 85.0 mL × 364 K / 293 K × 2.8 atm
V₂ = 30940 atm.mL.K / 820.4 K.atm
V₂ = 37.71 mL
what is the pOH of a solution if the concentration of hydronium ionsis 8.9x10-9
pOH of a solution = 5.95
Further explanationGiven
The concentration of hydronium ions : 8.9 x 10⁻⁹
Required
pOH
Solution
pOH = - log[OH]
[H₃O⁺]= 8.9 x 10⁻⁹
pH = - log[H₃O⁺]
pH = 9 - log 8.9
pH = 8.05
pH + pOH = 14
pOH = 14-pH
pOH= 14-8.05
pOH = 5.95
how many atoms are in sodium hydroxide
Answer:6 atoms
Explanation:Each NaOH has one Na and one O and one H. Therefore, 2 NaOH has 6 atoms.
Answer:
Three atoms
Explanation:
Hope this helps
How many moles are in 3.57 x 10^32 particles?
Answer:
3.57e+32
Explanation:
3.57e+32
please help me please
I think it is A,C,D hope this helps:)
God Bless
A_______ contains specific instructions for making proteins
A- CHROMOSOMES
B- GENE
C- MOLECULES
D- RIBOSOMES
Answer:
D Ribosomes
Explanation:
Answer:
D. Ribosomes
What volume of oxygen (02) gas is equal to 49.5 g 02 gas at STP?
Answer:
The volume of two moles of oxygen at STP is
Assuming that the gas is at standard temperature and pressure (STP), one mole of any gas occupies 22.4 L . This means the number of moles of O2 is 222.4=0.089 mol .
Explanation:
During photosynthesis the chemical bonds between are broken
Answer:
yes they are broken down into smaller units
HELP ASAP!!
Two colorless chemicals combine inside a glow
stick. When the chemicals combine, they produce
brightly colored light. The glow stick's temperature
does not change. (select all that apply)
emission of heat
emission of light
color change
formation of ga
Answer:
Emission of light
color change:)
Explanation:
Answer:
B and C
Explanation:
edge 2021
I just did it
2 points
If an element has 20 protons, 20 electrons and 20 neutrons, what is the
atomic number of this element?
Answer:
20
Explanation:
The atomic number of this element is 20.
Atomic number is the number of protons within an atom.
Since we have been given that the number of protons is 20. Therefore, the atomic number is 20.
Mass number of the atom is the number of protons plus the number of neutrons.
For this atom, mass number = 20 + 20 = 40
Atomic number is 20
What does the 2 in 2 CO represent?
Answer:
It means there are 2 carbon atoms or 2 molecules of Co(I cant tell by spacing but the 1st one is more likely)
Explanation:
A parent with freckles is crossed with a parent without freckles. The Punnett square shows the possible genotypes and phenotypes of the offspring. Which statement accurately describes the probability of phenotypes?
Answer: The likelihood of the offspring having freckles and not having freckles is the same.
Explanation:
Freckles are tiny brown spots on your skin, often in areas that get sun exposure. freckles are harmless. They shape as a consequence of melanin overproduction, which is responsible for skin and hair color (pigmentation). Overall, freckles derive from ultraviolet (UV) light stimulation.
Answer:
The likelihood of the offspring having freckles and not having freckles is the same.
Explanation:
just did it
What does the hydrosphere include?
Glaciers
Groundwater
Lava
Polar Ice
The hydrosphere include glaciers, groundwater, and polar ice. That is option A, B and C.
What is hydrosphere?Hydrosphere is defined as the part of the earth that is made up of water which includes the surface of the planet, underground, and in the air.
The water found in the hydrosphere of earth moves in cycles in such a way that non is lost.
The components of the hydrosphere include the following:
oceans, Polar ice,freshwater,surface water, groundwater, glacial water, and atmospheric water vapour.The polar ice is part of the hydrosphere because it is the frozen part of the earth's hydrosphere.
The lava is not part of the hydrosphere but part of lithosphere and it's released when volcanic eruptions occurs.
Therefore is can be concluded that glaciers, groundwater, and polar ice are parts of the hydrosphere while the lava is not part of the hydrosphere.
Learn more about hydrosphere here:
https://brainly.com/question/25796102
#SPJ1
7 Ba(ClO3)2
How many oxygen atoms are shown?
Which of the following best describes
electromagnetic waves?
A. Electromagnetic waves require the presence of a
medium to be able to transfer energy.
B. Electromagnetic waves can transfer energy through
empty space.
C. Electromagnetic waves can only transfer energy though
water.
Answer:
B.
Electromagnetic waves do not require any type of media.
The correct statement is " Electromagnetic waves can transfer energy through".
What is electromagnetic wave?Electromagnetic waves are synchronized vibrations of electric along with magnetic fields that travel across a vacuum at the speed of light. The oscillations of the two fields generate a transverse wave since they are perpendicular to each other and to the direction of energy as well as wave propagation.
What is energy ?The capacity to work is defined as energy. It can take the form of potential energy, kinetic energy, thermal energy, electrical energy, chemical energy, nuclear energy, or any other form.
Therefore, the statement "Electromagnetic waves can transfer energy through" will best describe electromagnetic waves.
Hence, the correct answer will be option (b).
To know more about energy and electromagnetic waves.
https://brainly.com/question/3101711.
#SPJ2
The image below shows how warm and cool
air moves over Earth
What is this type of air movement called?
A. convection current
B. atmospheric current
C. horizontal air current
D. prevailing surface winds
Answer:
convection current
Explanation:
A sample of hydrogen gas at a pressure of 0.926 atm and a temperature of 29.5 C, occupies a volume of 457 mL. If the gas is allowed to expand at constant temperature until its pressure is 0.447 atm, the volume of the gas sample will be ___ mL.
Answer:
V₂ = 946.72 mL
Explanation:
Given data;
Initial pressure = 0.926 atm
Initial volume = 457 mL
Temperature = constant = 29.5°C
Final pressure = 0.447 atm
Final volume = ?
Solution:
The given problem will be solved through the Boyle's law,
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
by putting values,
P₁V₁ = P₂V₂
0.926 atm × 457 mL = 0.447 atm × V₂
V₂ = 423.18 atm. mL/ 0.447 atm
V₂ = 946.72 mL
Which of the following reactions is balanced?
A. caC12 + H2C03 2CaC03 + HCI
B. caC12 + caC03 + 2HCl
C. caC12 + 2H2C03 caC03 + HCI
D. 2caC12 + H2C03 cac03 + HCI
Answer:
B. CaCl₂ + H₂CO₃ → CaCO₃ + 2HC
Explanation:
A balanced reaction has the same number of atoms in the both sides of the reaction. In the options:
A. CaCl₂ + H₂CO₃ → 2CaCO₃ + HCI
In this reaction there is 1 Ca in reactants and 2 in products -The reaction is unbalanced-
B. CaCl₂ + H₂CO₃ → CaCO₃ + 2HCl
There is 1 Ca is both sides, 2Cl, 2H, 1C and 3 Oxygens -The reaction is balanced
C. CaCl₂ + 2H₂CO₃ → CaCO₃ + HCI
There is 1 Ca in both sides but 2Cl in reactants and 1 in Cl -The reaction is unbalanced-
D. 2CaCl₂ + H₂CO₃ →CaCO₃ + HCI
There are 2 Ca in reactants and 1 in Ca -The reaction is unbalanced-
I need help with this question
what is the boiling point of a solution of 0.150mole Al(No3)3 in 0.500kg water. kb= 0.512
The boiling point of a solution : 100.1536 °C
Further explanationGiven
0.150 mole Al(NO₃)₃ in 0.500 kg water. kb= 0.512
Required
The boiling point
Solution
Colligative properties
ΔTb = Kb . m
m = molality = mol solute per kg solvent
m = 0.15 moles : 0.5 kg
m = 0.3
ΔTb = 0.512 x 0.3
ΔTb = 0.1536
ΔTb = Tb solution - Tb solvent (solvent=water, boiling point = 100 °C)
0.1536 = Tb solution - 100
Tb solution = 100.1536 °C
AlBr3 reacts with Fe(NO3)2. Which of these is a likely product of this reaction?
Answer:
FeBr2
it is what it is indeed
I have a project and I need help with a diagram. What do the moon, sun, and earth look like at night in the Americas? (diagram)
Answer: Hope This Helps
Explanation:
PET plastic # 1 is used in water bottles and pop bottles. Why should they be recycled but not be reused?
They should be recycled but not reused because the "repeated use increases the risk of leaching and bacterial growth." Also, recycling PET plastic "results in reduced energy consumption, lower cost, and reduced environmental impact."
Identify the nervous system responsible for calming the body and conserving energy.
Answer:
The parasympathetic nervous system is responsible for calming the body and conserving energy.
Explanation:
As the body conserves energy, pupils contract, heartbeat slows, blood pressure decreases, and digestion is stimulated.
It functions to restore homeostasis and is active when the body is at rest and recuperating.
16.
Which of the following elements is a metalloid?
a. As
c. Br
b. Se
d. Kr
Answer:
a. As
Explanation:
In a DNA molecule, the adenine always pairs with the
Answer:
Adenine always pairs with thymine in a DNAmolecule.
Explanation:
PLZ HELP THIS IS DUE RN!!!!!! NO ONE IS HELPING ME :(
You hold a 50N bowling ball above your head for 15 minutes. How much work have you done? Why?
9. You run the 100 M race in 15 seconds and your identical twin runs it in 14s. Who did more work? Why?
Answer:
Eght: 0
Explanation:
The work formula is W = F*d where d is displacement (which means the direction matters)
Same amount of work.
Eight
Time does not matter in Work. Force and Distance do.
F = 50 N
s = 0 The only work you have done is move the ball above your head. Thereafter you just held it.
t = 15 but no work is done. Tell your tired muscles that as they try and deal with holding a 5 kg mass above you head.
W = 0
Nine
Again from the last question you should be able to tell that time does not matter. The force is the same for both of you (that's why he's your identical twin).
So the work is the same. You both weigh the same. You both went the same distance.
8
