Answer:
72g
Explanation:
How many atoms are there in 0.075 mol of Pb
Answer:
There are 4.517x10^23 atoms of Zn in 0.750 mols of Zn
Explanation:
Define balanced forces(giving Brainly)
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
What part of a chemical is represented by the letters
Answer:
It's compound? It's chemical compound would be represented my letters or numbers
Answer:
The letters in a chemical formula are the symbols for the specific elements. So for example, H means hydrogen, O means oxygen, S means sul fur, C u means copper, F means fluorine, Fe means iron and Au means gold.
Explanation:
Yea, Hope I helped
Brainly appreciated
balance the following equations
1) 2KI + Cl2 → 2KCl I2
2) 2C2H6 + 7O2 → 4CO2 + 6H2O
3) 3Mg(NO3)2 + 2K3PO4 → Mg3(PO4)2 + 6KNO3
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.
Answer:
A
Explanation:
For Connexus/Edge
please help me on this question
Answer:
B
Explanation:
That seem the most locigal to me
How are the cells produced through mitosis and meiosis different?
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)
What are prevailing winds?
A) winds found along the equator that vary in speed
B) winds that change seasonally and vary in speed
C) winds found at the poles at a consistent speed
D) winds that blow in the same direction at a consistent speed
Answer:
D) winds that blow in the same direction at a consistent speed
Explanation:
i took the quiz got it right so i know the answer please trust me i know this is right i promise with all my heart
Describe the behavior of water molecules during each stage of the water cycle.
Hurry pls this is due by the end of the class period so like 10 MINUTES HELP
Answer:
chupapi muano goagaag djdu
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
How many milliliters are in 458 liters?
Answer:
458000
Explanation:
heat flows naturally from objects that have higher energy to those with?
Answer:
heat flow
Explanation:
heat flow moves to a higher temperature to a lower temperature
If a species is unable to adapt within a
changing environment what can happen to
that species?
Answer:
That species will most likly go extinct.
Explanation:
When a species cant adapt, thay will have a hard time finding food, shelter ext. Because of this they will most likly die out.
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.
The thin muscular wall that separates the right side of the heart from the left side is called the
How many grams of water can be heated from 25°C to 70°C using 15,000 J?
What is the name of the following compound?
Al4C3
-Silver carbonate
-Aluminum carbide
-Aluminum carborhte
-Silver carbide
fill in the blank question
please help asap!!!!!!!!!!!!!!
Answer:
since unlike charges attract, negative side of another water molecule, neutral
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?
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 :)
keyboard_arrow_left
Exit
notifications
MR
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
Answer:
wait what?
Explanation:
Answer:
PLS EXPLAINNNNNNNNNNNNN
How do ionic bonds form between atoms?
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...
Answer:
1. Mountain ranges
2.
3.pacific ocean ??
4.tempature
I'm not really sure on 2 bit trying to help you :)
What are facts about Cells
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)
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
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
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:
A reaction yields 6.25 grams of a product. What is the percent yield if the theoretical yield is 18.8 grams?
Answer:
Ans. 33.2%
Explanation:
Teacher Told me
Can the structure of an atom be broken down into smaller parts?
Answer
yes it can because it can be split in to neutrons and electrons.
Explanation:
Why does increasing temperature generally increase the rate of a chemical reaction?
A. It increases the amount of reactant
B. It decreases the size of the reactant particles.
C. It causes the particles of the reactants to move faster and collide more often.
D. It increases the space between reactant particles so they have more room to move apart
balance the equation C2H5OH + 3O2 → CO2 + H2O
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
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?
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