Answers
Related Questions
____ are designed to make necessary adjustments to place a satellite into stable orbit.
Answers
there an A B C D thing?
Explanation:
890
Answer: thrusters
Explanation: got it right
How many oxygen atoms are in one mole of carbon dioxide
Answers
Answer:
abt 2 moles
Explanation:
1 mole of carbon atoms per mole of carbon dioxide = 6.02 x 1023 carbon atoms. 2 mole of oxygen atoms per mole of oxygen atoms = 2 x 6.02 x 1023 oxygen atoms.
Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.
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Critical mass can be achieved by compressing the sample of americium-241 and also removing the deflective shield surrounding the sample.
What is critical mass?Critical mass of a nuclear reaction is the mass of nuclear fuel which is just sufficient for a nuclear fission reaction to proceed and be sustained.
In order to achieve critical mass, the density of the fuel is increased by compressing the sample of americium-241 and also remove the deflective shield surrounding the sample.
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Answer: A
Explanation:
describe what happens when water vapour cools to liquid water(change in arrangement,change in movement,change in energy)
Answers
Answer:
CONDENSATION When steam is cooled, it releases thermal energy and turns into its liquid state. This process is called condensation.
Explanation:
You and your classmates are working to develop a prototype for a new type of drone. The drone needs to fly and will be controlled by a remote control. Which STEM fields would be most important for you to have knowledge of to build this drone?
A) chemistry and botany
B) astronomy and geology
C) medicine and geology
D) physics and computer science
Answers
What clues indicate that a chemical reaction has occurred?
Choose all correct answers.
the formation of a new liquid
a color change
a temperature change
the formation of bubbles
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Answer:
its probably all of the above, if not then it should be the formation of a new liquid, and a color change
Explanation:
which term best defines the feeding behavior of most gulls?
Answers
Answer:
Gulls, or colloquially seagulls, are seabirds of the family Laridae in the suborder Lari. They are most closely related to the terns and skimmers and only distantly related to auks, and even more distantly to waders. Until the 21st century, most gulls were placed in the genus
Sodium-24 has a half-life of 15 hours. How much sodium-24 will remain in a 36.0-g sample after 45 hours
Answers
Answer:
4.5 gm left
Explanation:
45 /15 = 3 half lives (1/2 )^3 =1/8 th
1/8 * 36 = 4.5 gm
Why is copper a pure substance? a. because it is an element b. because it is a compund c. because it is a homogenous mixture
Answers
Answer:
a. because it is an element
Explanation:
its pure because it only has one type of atom, making it an element
What is the color of bromocresol green indicator in a solution with a ph value of 2. 0.
Answers
Answer:
The answer would be "Yellow"
Explanation:
Hope this helps!
Which of the following equation is balanced?
Answers
Answer:
2fe2o3+3c=4fe+3co2
Explanation:
because 2×2 =4 fe &2×3=6 so we put it like 3co2
Water has a specific heat of 4.184 J/goC. Copper metal has a specific heat of 0.385 J/goC. What can be said about the amount of heat needed to raise both substances 1 degree Celsius. (In other words, which one will take more heat to raise 1 degree.)
Answers
It can be said that water will take more heat to raise its temperature by 1°C than copper. Details about specific heat can be found below.
What is specific heat capacity?Specific heat capacity of a substance can be defined as the amount of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K or 1 °C.
According to this question, water has a specific heat of 4.184 J/g°C while Copper metal has a specific heat of 0.385 J/g°C. This shows that water has a higher specific heat.
Therefore, it can be said that water will take more heat to raise its temperature by 1°C than copper metal.
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The lewis electron dot system represents electrons in the--
a) outer energy level
b) inner level
c) core level
d) middle level
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Answer:
the correct answer is a. the lewis structure represents only the outer energy level
formation of water: 2H2 + 1 O2 --> 2H20
How many moles of O2 will I need to produce 15 moles of H2O?
Answer don’t delete comment or I’ll report
Answers
Answer:
n=15 moles H2O
1:2
x:15
x=7.5 moles of O2
What is the compound N₂O called?
Answers
Answer:
I believe its preferred to as "Laughing Gas." It's also called, Nitrous Oxide.
PLEASE HELP DUE IN 10 MINUTES In your own words, how does photosynthesis work?
Answers
Answer:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil
What is the poh in a solution if the [oh-] = 5.42 x 10-5 m?
a
5.26
b
7.26
c
4.26
d
6.26
Answers
Answer:
b
Explanation:
is the dictionary definition of a word.
is the feeling or idea associated with a word.
How can these objects all weigh the same but be different sizes?
Answers
WILL GIVE BRAINLIEST
If an element is in period 6, what is the highest possible number of electrons that can be in that atom?
Answers
I need this now for a test
explain why the dust clouds that moved to the east coast of the united states during the 1934 storm were composed mostly of silt and clay particles
instead of sand
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Dust clouds that moved to the east coast of the united states were composed mostly of silt and clay particles due to constant ploughing during drought.
What is Drought?This is defined as dry period in the climate due to insufficient rainfall in the area at a given time.
The drought led to the soil being constantly ploughed thereby loosening and changing the soil type which is susceptible to wind erosion.
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If the molar mass of aluminum chloride was actually 400 g/mol, what would the molecular formula of aluminum chloride be?
Answers
Answer:
3AlCl₃
Explanation:
molar mass of aluminum chloride AlCl₃ is 133.33 g/mole
133.33 times 3 is 400
put 3 in front of AlCl₃
3AlCl₃
https://study.com/academy/lesson/aluminum-chloride-formula-molar-mass-decomposition.htm
How many kilojoules of heat are produced when 34.0 g of Fe2O3 reacts with an excess of CO according to the following reaction? Fe2O3 + 3 CO 2 Fe + 3 CO2 ΔH = -26.3 kJ
Answers
The heat produced when iron oxide reacts with carbon monoxide is -23.47 kJ/mol.
What is the enthalpy of reaction?
The standard enthalpy of the reaction is given by the enthalpy of formation of the products and the reactants. The reactants and the products of the reaction are:
Fe₂O₃ (s) + 3CO (g) → 2Fe(s) + 3CO₂ (g)
We know,
The standard enthalpy of formation of iron oxide = −825.50 kJ/mol
The standard enthalpy of formation of carbon monoxide = −110.53 kJ/mol
The standard enthalpy of formation of carbon dioxide = −393.52 kJ/mol
The standard enthalpy of reaction is calculated as:
[tex]\rm \Delta H_{rxn}[/tex] = [2(0) + 3(−393.52)] - [1(-825.50) + 3(-110.53)]
= (0−1180.56+825.50+331.59)
= −23.47 kJ/mol
Therefore, −23.47 kJ/mol is produced.
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A semiconductor:
A.
always allows charge to flow.
B.
never allows charge to flow.
C.
cannot be used at normal temperatures.
D.
has characteristics between conductors and insulators.
Answers
Answer:
D. has characteristics between conductor and insulator
What property of copper makes it ideal to create thin sheets of
copper?
Answers
Copper is a soft, ductile, and malleable metal that bends and stretches easily without breaking. Copper is a versatile metal for construction and manufacturing because of this.
Calculate the number of joules released when 75.0 grams of water are cooled from
100.0°C to 27.5°C
Answers
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 does an unconformity affect our geological knowledge of an area?
Answers
Answer:
Because the Earth is always shifting, so research has to constantly be updated.
how many grams of sodium Phosphate is needed to prepare 5.0 L of a 2.6M solution ?
Answers
Molarity is the ratio of the moles and the volume. The mass of 2.6 M sodium phosphate solution is 2131.22 gms.
What is mass?
Mass is the product of the moles and the molar mass of the substance. It is given as,
Mass = Moles × Molar mass
The moles from molar concentration is used to calculate mass as:
Mass = Molarity × volume × molar mass
= 2.6 × 5.0 × 163.94
= 2131.22 gms
Therefore, 2131.22 gms is the mass of sodium phosphate.
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A nuclide of phosphorus 3015P decays into a nuclide of silicon 3014Si. In order to satisfy charge conservation and lepton number conservation the other products must be __________.
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In order to satisfy charge conservation and lepton number conservation the other products must be neutron.
What is conservation of mass?
The principle of conservation of mass states that, the sum of the initial mass of reactants must be equal to final mass of the products.
[tex]_{15}^{30}P\ --- > \ _{14}^{30} Si \ + \ ^{0}_{1} n[/tex]
The balanced reaction of radioactive decay of phosphorous shows conservation of mass.
Thus, in order to satisfy charge conservation and lepton number conservation the other products must be neutron.
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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?
Answers
Answer:
what is on the surface of the moon.
Explanation:
Protons and neutrons are made from which of the following particles?
Down quarks only
Hadrons
Up quarks and down quarks
Up quarks only