Answers
Related Questions
Which two types of waves require matter in order to travel?
О A. Light Waves
О B. Water Waves
О C. Electromagnetic Waves
О D. Sound Waves
Answers
Answer:
water waves and sound waves
Your sick puppy is diagnosed with roundworms. They grow inside of the puppy. What type of symbiotic relationship do the puppy and the roundworms have?
A. Cooperative
B. Commensalism
C. Mutualism
D. parasitism
Answers
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Test #1 - Energetics
Assigned to Guests
by Trudy Jackson
Live Session
4 Questions
1
5
Calculate the standard enthalpy of formation of gaseous diborane (B2H6) using the following thermochemical information:
4B (s) + 3O2 (g)
→\rightarrow
→ 2B2O3 (s);
Δ\Delta
Δ H = -2509.1 kJ
2H2 (g) + O2 (g)
→\rightarrow
→ 2H2O (l);
Δ\Delta
Δ H = -571.7 kJ
B2H6 (g) + 3O2 (g)
→\rightarrow
→ B2O3 (s) + 3H2O (l);
Δ\Delta
Δ H = -2147.5 kJ
(click below to write/draw)
=
B2H6(G)
2B(S)+3H2
Show Your Work
2
5
Hydrogen cyanide can be prepared by the reaction:
CH4 (g) + NH3 (g)
→\rightarrow
→ HCN (g) + 3H2 (g)
What is the heat of reaction at constant pressure? Use the following thermochemical equations:
N2 (g) + 3H2 (g)
→ \rightarrow
→ 2NH3 (g);
Δ\Delta
Δ H = -91.8 kJ
C (graphite) + 2H2 (g)
→\rightarrow
→ CH4 (g);
Δ\Delta
Δ H = -74.9 kJ
H2 (g) + 2C (graphite) + N2 (g)
→\rightarrow
→2HCN (g);
Δ \Delta
Δ H = 270.3 kJ
(click below to write/draw)
3
5
Complete the following Born Haber cycle for barium phosphide, Ba3P2.
(click below to write/draw)
Show Your Work
4
5
Use bond energies to estimate
Δ\Delta
ΔH for the reaction below:
(click below to write/draw)
Show Your Work
You have responded to 1 of 4 questions.
Submit
1
2
3
4
gesture
keyboard_ar
Hydrogen cyanide can be prepared by the reaction:
CH4 (g) + NH3 (g)
→\rightarrow
→ HCN (g) + 3H2 (g)
What is the heat of reaction at constant pressure? Use the following thermochemical equations:
N2 (g) + 3H2 (g)
→ \rightarrow
→ 2NH3 (g);
Δ\Delta
Δ H = -91.8 kJ
C (graphite) + 2H2 (g)
→\rightarrow
→ CH4 (g);
Δ\Delta
Δ H = -74.9 kJ
H2 (g) + 2C (graphite) + N2 (g)
→\rightarrow
→2HCN (g);
Δ \Delta
Δ H = 270.3 kJ
Answers
Answer:
wait what?
Explanation:
Answer:
PLS EXPLAINNNNNNNNNNNNN
What will happen to an object
that is more dense than the fluid
it is in?
A. It will sink.
B. It will float.
C. It will rise to the surface.
D. It will bounce out of the water.
Answers
Answer:
A
Explanation:
For Connexus/Edge
fill in the blank question
please help asap!!!!!!!!!!!!!!
Answers
Answer:
since unlike charges attract, negative side of another water molecule, neutral
What is the name of the following compound?
Al4C3
-Silver carbonate
-Aluminum carbide
-Aluminum carborhte
-Silver carbide
Answers
-Aluminum Carbide
Help!
Which of the following can scientists NOT interpret by examining fossils?
A. How earth's environment has changed overtime.
B. How plants and animals have changed overtime.
C. The age of certain layers of rocks. D. How the pull of gravity has changed.
Answers
Can the structure of an atom be broken down into smaller parts?
Answers
Answer
yes it can because it can be split in to neutrons and electrons.
Explanation:
How many grams are in 2.2 moles of magnesium hydroxide?
128.33g
26.51g
0.04g
Answers
Answer:
128.33g
Explanation:
what is an example of a combustion reaction
if possible, can it come with an explanation pls
Answers
Answer:
An example of a combustion reaction is the burning wood in a fire.
Explanation:
In the combustion reaction, the carbohydrates in wood combine with oxygen to create water and carbon dioxide. This reaction is very energetic, and it generates heat and light as it releases said energy.
Hope this helps! Have a nice day! (And please mark me brainliest)
A reaction yields 6.25 grams of a product. What is the percent yield if the theoretical yield is 18.8 grams?
Answers
Answer:
Ans. 33.2%
Explanation:
Teacher Told me
A neutral atom possesses an atomic number of 13 and an atomie mass of 27. Three electrons are lost.
From what region of the atom are they lost?
outside the atom
inside the nucleus
outside the nucleus
both inside and outside the nucleus
Answers
How many atoms are there in 0.075 mol of Pb
Answers
Answer:
There are 4.517x10^23 atoms of Zn in 0.750 mols of Zn
Explanation:
Which organelle is found in both prokaryotes and eukaryotes?
a. Mitochondria b. Ribosomes c. Cell
Answers
Answer: It would be ribosomes..
Explanation:
The Big Bang Theory is a hypothesis that states that all matter
and energy were at one time compressed into a small volume
and then _________
Answers
Answer:
I’m not sure how they want you to answer the fill in blank.
Explanation:
The Big Bang is a theory where 14 billions years ago all matter and energy in the universe was compressed into an extremely small volume that exploded and began expanding in all directions.
The big bang theory is a hypothesis that states that all matter and energy were compressed into a small volume at one time and then expanded outward.
What is Big Bang Theory?The big bang model of the universe can be described as the model to identify the beginning of the universe. The big bang model is a cosmological model which is described by the software development life cycle.
The Big Bang theory is the dominant model of the observable universe from its beginnings to large-scale evolution. This model explains how the universe is expanded from a state of high density and temperature. It provides an explanation for phenomena, such as cosmic microwave background radiation, the abundance of light elements, and large-scale structure.
Due to the big bang as we know, the universe has been created existing about 12 - 15 billion years ago. According to the theory that the Big bang was a gigantic explosion that formed all of the energy and mass in less than a second in the universe.
Learn more about Big Bang Theory, here:
https://brainly.com/question/1160650
#SPJ5
Define balanced forces(giving Brainly)
Answers
Answer:
Explanation:
Balanced forces are opposite in direction and equal in size.
Balanced forces are in a state of equilibrium.
Answer:
Balanced forces are forces whose net amount remains zero.
This can take place when two equal forces are acting in opposite direction.
Balanced forces don't make any change in the position of objects
please help me on this question
Answers
Answer:
B
Explanation:
That seem the most locigal to me
The thin muscular wall that separates the right side of the heart from the left side is called the
Answers
What are two things in nature that solar energy powers?
Answers
Answer: light and heat
Explanation:Our sun is the source of all life on Earth, and solar energy is useful to us in many different ways. The sun creates two main types of energy - light and heat - that we can harness for many activities ranging from photosynthesis in plants to creating electricity with photovoltaic (PV) cells to heating water and food.
How many grams of water can be heated from 25°C to 70°C using 15,000 J?
Answers
heat flows naturally from objects that have higher energy to those with?
Answers
Answer:
heat flow
Explanation:
heat flow moves to a higher temperature to a lower temperature
Select the correct text in the passage.
Which statements in this passage about volcanoes do not contain factual errors?
The Hawaiian islands are known for their volcanic activities. In fact, the islands were formed from volcanoes. Before a volcano erupts, earthquake activity beneath the volcano decreases. Scientists use seismometers to measure the earthquake activity that occurs beneath a volcano. They then predict the eruption of that volcano. When a volcano erupts, the amount of carbon dioxide and sulfur dioxide emitted decreases. Scientists measure the amount of these gases to determine the amount of magma present in the volcanic reservoir.
(I couldn't find the science subject so I just put chemistry)
Answers
Answer:
The answers are
1. Scientists use seismometers to measure the earthquake activity that occurs beneath a volcano. They then predict the eruption of that volcano.
2. Scientists measure the amount of these gases to determine the amount of magma present in the volcanic reservoir.
Explanation:
When a volcano is near eruption Earthquake activity gets stronger and stronger. Scientists use a wide variety of techniques to monitor volcanoes, including seismographic detection of the earthquakes and tremor that almost always precede eruptions, precise measurements of ground deformation that often accompanies the rise of magma, changes in volcanic gas emissions, and changes in gravity and.
Scientists can use the FTIR or Fourier Transform Infrared Spectrometer to measure dissolved volatile concentrations as described above or can be used to measure several gases emitted from a volcano simultaneously. The device can be used both as an open-path or closed-path system. I had just taken the test and got the question right as well
The statements in this passage about volcanoes which do not contain factual errors are scientists use seismometers to measure the earthquake activity that occurs beneath a volcano.Scientists measure the amount of these gases to determine the amount of magma present in the volcanic reservoir.
What are errors?Errors in chemical analysis are defined as a result when there is a difference between observed value and the true value.If the magnitude of errors is large , it results in a decrease in accuracy, reproducibility, and precision.
There are three types of errors present:1) random error 2) systematic error 3) human error.The cause of random errors are difficult to quantify while the human errors can be minimized by taking a range of readings or observations to reduce the error.
Errors while measuring boiling point may be human errors while noting down the boiling temperature or instrumental error or systematic error if there is a fault in the thermometer.
Learn more about errors,here:
https://brainly.com/question/30931350
#SPJ3
balance the equation C2H5OH + 3O2 → CO2 + H2O
Answers
Answer:
C2H5OH + 3O2= 2C02+ 3H20
Thus we have
2 Carbons on the left and 2 on the right
6 Hydrogen on both sides
1 oxygen from Ethanol and 6 from O2 for the left side, 4 from CO2 for the right and 3 from H20
Explanation:
hopefully this is right lol
How do ionic bonds form between atoms?
Answers
How are the cells produced through mitosis and meiosis different?
Answers
Answer:
In mitosis 2 identical cells are created, but in meiosis 4 sex cells are created.
Explanation:
In mitosis there are 5 stages. These stages are prophase, prometaphase, metaphase, anaphases, and telophase. In meiosis there are also 5 stages, they are the same phases, they just end with II. (Ex. Prophases II)
balance the following equations
Answers
1) 2KI + Cl2 → 2KCl I2
2) 2C2H6 + 7O2 → 4CO2 + 6H2O
3) 3Mg(NO3)2 + 2K3PO4 → Mg3(PO4)2 + 6KNO3
We have 548 grams of CaCl2. How many molecules of CaCl2 do we have? (The molar mass of CaCl2 is 110.98 g/mol)
Group of answer choices
2.97 x 10^24 molecules
3.66 x 10^28 molecules
9.1 x 10^22 molecules
4.37 x 10^22 molecules
Answers
Answer:
Try everything
2.97 x 10^24 molecules
3.66 x 10^28 molecules
9.1 x 10^22 molecules
4.37 x 10^22 molecules
Explanation:
Directions: Fill in the blanks with the correct terms to complete the statements. Write your answer on your answer
sheet.
1. Landforms like tall_______
act as an obstacle to traveling air masses, forcing them to rise over the peaks.
2.A___________is likely to dissolve or decrease its wind speed when it passes over a mountain or a mountain range.
3. Bodies of water like________is the main factor in the formation of typhoon.
4. The air in bodies of water is__________due to the evaporation of water.
5. Warm air builds up or increases the__________of a tropical cyclone.
help this question plzzss
I gave brainlest...
Answers
Answer:
1. Mountain ranges
2.
3.pacific ocean ??
4.tempature
I'm not really sure on 2 bit trying to help you :)
If a Maritime Tropical Air mass begins in the Southern United States and keeps traveling North directly over the central USA, will it remain a Maritime Tropical air mass? Why?
Answers
Answer:
If a Maritime Tropical Air mass begins in the Southern United States and keeps traveling North directly over the central USA, it will turn into a polar air mass.
Explanation:
because Northern USA is colder than the South :)
Thermal energy is added to water to raise the temperature to 250F.
Which of the following models BEST describes the movement of the particles after the thermal energy is added?
Answers
Answer:A
Explanation:the water will start to boil representing the yellow particles.
Answer:
A
Explanation:
Lol I'm doing the test right now and I have notes