Answer:
c
Explanation:
just took the test 100 on it the test is simple machines
it takes 125.0ml of 3.5M hydrobromic acid to neutralize 75.0ml of lithium hydroxide. what is the concentration of lithium hydroxide
Answer:
5.83 M
Explanation:
3.5 M * 125.0 ml = M₂ * 75.0ml
437.5 M.ml = M₂ * 75.0 ml
M₂ = 437.5 M.ml / 75.0 ml
M₂ = 5.83 M
The half-life of radium-226 is 1,600 years. It decays into radon-222. What fraction of the original amount of radium-226 in a sample will still be radium
after 8,000 years?
A.1/8
B.1/4
c.1/32
D.1/16
Answer:
Your answer will be C. 1/32
Answer:
C. 1/32
Explanation:
how many total atoms are there is a sugar molecule
Answer:
The white stuff we know as sugar is sucrose, a molecule composed of 12 atoms of carbon, 22 atoms of hydrogen, and 11 atoms of oxygen (C12H22O11). Like all compounds made from these three elements, sugar is a carbohydrate
Calculate the molarity of a solution that contains 4.7 moles in 5.2 liters.
.9 M
24.4 M
1.1 M
.5 /m
Answer:
0.9M
Explanation:
molarity = mols/L
M=4.7mol/5.2L
= 0.9M
What is the relationship between the volume of a gas and its pressure?
O inversely proportional
O Directly proportional
O No relationship
O Every gas has a different relationship with pressure
Answer:
inversely proportional
Explanation:
How many grams of NaOH are needed to make 2.00 L of a 0.200 M solution?
Answer: 16.0 g
Explanation: M(NaOH) = 39.998 g/mol. N = m/M = cV
Mass m = McV = 39.998 g/mol·0.200 mol/l · 2.0 l = 16.0 g
What actions could you take to increase the rate of solution for a solid solute that dissolves endothermically in 100g of water?
Answer:
We will increase the temperature for a solution to be dissolved more into water.
To form a solution, energy is required to break the particles. If more energy is required to break the bonds of solute and solvent than the energy is released, then its called endothermic reaction.
For an endothermic solution, we would have to provide heat / temperature (energy) so that more solute can be dissolved in water which can increase the rate of solution.
Draw or sketch something that you might see move. Write a caption that answers the following questions: How would you describe its motion? Is it moving at a constant speed, or does it speed up and slow down?
Answer:
lets say your doing a frog
it jumps it speeds up and then slows down
Explanation:
formula of atom bomb
Answer:
It says that the energy (E) in a system (an atom, a person, the solar system) is equal to its total mass (m) multiplied by the square of the speed of light (c, equal to 186,000 miles per second).
Explanation:
Need help on this question asap pleasee I would really appreciate it
Answer:
See Explanation
Explanation:
An endothermic reaction is one in which energy is absorbed and the change in enthalpy for the reaction is positive.
If we look at the reaction 2HgO + 45kcal ----> 2Hg + O2; we will notice that
i) 45kcal of energy was taken in (absorbed) for the reaction to occur
ii) The value of the reaction enthalpy is positive
For these two reasons, the reaction is an endothermic reaction as written.
How does circulation help maintain body temperature?
Answer:
Answer Below
Explanation:
Your feet and hands are thin compared to the rest of your body. Thin stuff has a large surface area compared to volume. Surface area is where you lose heat and volume is where you generate heat. Because of this, they lose heat quickly and do not generate enough heat to stay warm. To fix this your body also moves heat around from your warm core to your hands and feet using your blood. Your blood is warm. It gets to be that way because it runs through areas, mostly in your torso, that are always warm
i need answers for each one of these questions, or an explanation on how to find them on a calculator
Answer:
(9.03x10^-14)x(8.455x10^20)=7.634865x10^7
(5.2x10^11)/(2.10x10^-4)=2.476190x10^15
(7.67x10^12)x(3.8x10^15)=29146000000000000000000000000
(9.237x10^20)/(4.5x10^-6)=2.0526x10^26
Explanation:
A gas initial volume and pressure is 5m^3 and 101320 Pa and allows to expand up to 12m^3 then what is the final pressure?
Answer:
New pressure = 42216.66 Pa
Explanation:
Given that,
Initial volume, V₁ = 5 m³
Final pressure, P₁ = 101320 Pa
Final volume, V₂ = 12 m³
We need to find the final pressure of the gas. We know that the relation between pressure and volume is given by :
[tex]P\propto \dfrac{1}{V}\\\\P_1V_1=P_2V_2\\\\P_2=\dfrac{P_1V_1}{V_2}\\\\P_2=\dfrac{101320 \times 5}{12}\\\\P_2=42216.67\ Pa[/tex]
So, the new pressure is equal to 42216.66 Pa.
Which activity is the best demonstration of J.J. Thomson’s use of creativity in his work?
Answer:
The correct answer is making observations in his experiment. In his cathode ray tube experiment J. J. Thomson proved that the cathode rays are indeed negatively charged particles.
Some of the glucose required for cellular respiration in humans is obtained by??
Answer:
.
Explanation:
Some of the glucose required for cellular respiration in humans is obtained by external food source which are rich in carbohydrates.
What is cellular respiration?Cellular respiration is the process in which cells combines the oxygen with the foodstuff molecules, and converting the chemical energy into life sustaining activities as energy.
In the human body, we get the glucose for the cellular respiration from the external food source which are riched in carbohydrates, starch, etc. After converting the chemical energy to glucose then oxygen is absorbed in the lungs and circulate the blood through out the body by red blood cells.
Hence, we get glucose from food source.
To know more about cellular respiration, visit the below link:
https://brainly.com/question/2809259
Who develope the device used to measure the magnitude of an earthquake?
A. Art Smith
B.Charles Richer
C.Edward Sheriden
D.James Hutton
Answer:
B
Explanation:
Figure 1 - Charles Richter studying a seismogram. There are a number of ways to measure the magnitude of an earthquake. The first widely-used method, the Richter scale, was developed by Charles F. Richter in 1934.
Cc
( (CC
?
A man and a woman want to have a child, but the man is heterozygous (Ce) for a
recessive trait that causes a fatal illness. What is the probability of a child inheriting the
trait?
a 50%
b. 25%
c. 0%
d. 75%
Answer:
You should be posting this question under the biology tab, but here's the answer nonetheless.
a. 25% (if the woman is Ce)
c. 0% (if the woman isn't Ce)
In the reaction below, 22 g of H2S with excess
O2 produced 5 g of sulfur.
? H2S + ? O2 → ? S + ? H2O .
What is the percent yield of sulfur?
Answer in units of %.
Answer:
24.1 %
Explanation:
This is the reaction of oxygen between hydrogen sulfide.
The equation is:
2H₂S + O₂ → 2S + 2H₂O
As the oxygen is the excess, limting reagent is the H₂S.
We convert the mass to moleS: 22g / 34.06 g/mol =
0.646 moles
Ratio is 2:2. 2 moles of sulfide can produce 2 moles of sulfur.
Then, 0.646 moles of sulfide will produce 0.646 moles of S.
We convert the moles to mass: 0.646 mol . 32.06 g/mol =
20.71 g
That's the theoretical yield.
% yield = (produced yield / theoretical yield) . 100
% yield = (5 g/ 20.71g) . 100 = 24.1 %
The moon appears to change _________ over the course of the _______________.
Answer:
shape or size? over the course of the month
what is amphotheric oxide give me an two instance
Answer:
Amphoteric oxide is an oxide that reacts with both acids and bases. In other words, it possesses both acidic and basic properties. For example both zinc and aluminium are metals but their oxides, ZnO and Al2O3 are amphoteric oxides as they react with both acids and bases.
Explanation:
Jane made this picture to represent a chemical reaction
Which of the following statements best explains the type of chemical reaction represented by Jane's picture?
It represents a synthesis reaction because one combined reactant forms multiple products
Olt represents a synthesis reaction because the same atoms are present in the reactants and products
It represents a decomposition reaction because one reactant breaks apart and forms two products
It represents a decomposition reaction because the total mass of the products is less than the mass of the reactant.
Answer:
It represents a decomposition reaction because one reactant breaks apart and forms two products
Explanation:
Your welcome
To solve such this we must know the concept of redox reaction. Therefore, the correct option is option C. It represents a decomposition reaction because one reactant breaks apart and forms two products.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Decomposition reaction is a chemical reaction where one reactant breaks down into two or more than two products on supplying energy in form of heat or electricity.
Therefore, the correct option is option C. It represents a decomposition reaction because one reactant breaks apart and forms two products.
Learn more about the chemical reactions, here:
brainly.com/question/3461108
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Which of the following is not a type of covalent bond?
A. Polar
B. Double
C. Non-polar
D. Quadruple
Answer:
letter b
Explanation:
I dunno if I'm right cuz I'm just a grade five sorry if this can't help
how many grams are in 4.28 x 10^2 atoms of Ca?
2.85 grams
4.28x10^2 atoms (40.08 grams of Ca/ 6.02x10^23)
What is the difference between the solid line and the dotted line?
Answer:
it is dotted
Explanation:
in an ionic bond:
A. both atoms share their electrons.
B. one atom accepts electrons from another.
C. The atoms attract each other but their electrons do not interact.
D. The atoms swap electrons
1. Scientists create both scientific theories and scientific laws as they make observations and conduct experiments about the natural world. Which of the following statements most accurately compares the difference between scientific theories and scientific laws?
a) Scientific laws are based on evidence, while scientific theories are not.
b) Scientific theories involve only biology, while laws involve all types of science.
c) Scientific theories involve mathematical equations, while scientific laws are based on observations.
d) Scientific theories are ideas that explain natural events, while scientific laws more reliably predict natural events
Answer:
D
Explanation:
While scientific laws more accurately forecast natural events, scientific theories are beliefs that explain natural happenings. So, the correct option is D.
What is the difference between scientific laws and scientific theories?Scientific laws are explanations for why certain occurrences occur or explanations of the phenomenon occurring itself. The outcomes or the causes of such phenomena are not explained. By stating a link verbally or mathematically, it only clarifies the situation and makes the underlying "science" simpler to comprehend.
On the other hand, scientific theories are those that make an effort to define or clarify why a phenomenon occurs. Its foundation is observation. Before drawing a conclusion, there is still a process of learning or discovery. It is a conceptual framework for explaining and projecting new information.
Thus, the correct option is D.
Learn more about Scientific theories, here:
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PLEASE HELP ASAP
Volcanoes erupt as a result of
A) Two continental plates converging
B) One oceanic plate converging with one continental plate
C) Two tectonic plates transforming
Answer:
B.) One oceanic plate converging with one continental plate.
HOPE THIS HELPS!
Answer:
C: Two tectonic plates transforming
An inherited behavior or physical characteristics that helps an organism survive and reproduce Natural selection Predation Adaptation Competition
look at pic thanks :D
Answer:
it's natural selection
Explanation:
adaptation is when you adapt to some situation
How many molecules are there in 0.655 moles of C6H14
Answer:
[tex]\boxed {\boxed {\sf 3.94 *10^{23} \ molecules \ C_6 H_ {14} }}}[/tex]
Explanation:
1 mole of any substance has the same number of particles: 6.022 * 10²³. This number is as Avogadro's Number.
The particles can be molecules, atoms, formula units, etc. For this problem, the particles are molecules of C₆H₁₄ or hexane.
We can set up a ratio using Avogadro's Number.
[tex]\frac {6.022 *10^{23} \ molecules \ C_6H_{14}}{1 \ mol \ C_6H_{14}}[/tex]
Multiply by the given number of moles: 0.655
[tex]0.655 \ mol \ C_6H_{14} * \frac {6.022 *10^{23} \ molecules \ C_6H_{14}}{1 \ mol \ C_6H_{14}}[/tex]
The moles of hexane will cancel, because one is the "numerator" (techincally 0.655 is over 1) and the other is in the denominator of the ratio.
[tex]0.655 * \frac {6.022 *10^{23} \ molecules \ C_6H_{14}}{1 }[/tex]
[tex]0.655 * {6.022 *10^{23} \ molecules \ C_6H_{14}}[/tex]
[tex]3.94441*10^{23} \ molecules C_6H_{14}[/tex]
The original value of moles has three significant figures, so our answer must have the same. For the number we found, that is the hundredth place.
3.94441The 4 in the thousandth place tells us to leave the 4 in the hundredth place.
[tex]3.94 *10^{23} \ molecules \ C_6H_{14}[/tex]
0.655 moles of hexane is equal to approximately 3.94 *10²³ molecules of hexane.
Instructions
Click the links to open the resources below. These resources will help you complete the assignment. Once you have created your file(s) and are ready to upload your assignment, click the Add Files button below and select each file from your desktop or network folder. Upload each file separately.
Now that the lab is complete, it is time to write your lab report. The purpose of this guide is to help you write a clear and concise report that summarizes the lab you have just completed.
The lab report is composed of four sections:
Section I: Experimental Overview
• Provide background information.
• Include the hypothesis(es).
• Summarize the procedures.
Section II: Data and Observations
• Summarize the data you collected in the lab guide.
• Include information from data tables.
• Include any written observations that are relevant.
Section III: Analysis and Discussion
• Discuss any important calculations or formulas used.
• Identify key results, what the results indicate, and any trends in the data.
• Include graphs (if constructed) that display trends in the data.
• Provide possible reasons for any problems with the experiment, or unexpected data.
Section IV: Conclusions
• Identify if the hypothesis(es) was (were) supported or refuted.
• Provide logical reasoning based on data.
• Explain how the experiment could be improved.
To help you write your lab report, you will first answer the questions listed below by reflecting on the experiment you have just completed. Then you will use the answers to these questions to write the lab report that you will turn into your teacher.
You can upload your completed report with the upload tool in formats such as OpenOffice.org, Microsoft Word, or PDF. Alternatively, your teacher may ask you to turn in a paper copy of your report or use a web-based writing tool.
Questions
Section I: Experimental Overview
• What is the purpose of the lab, the importance of the topic, and the question you are trying to answer?
• What is your hypothesis (or hypotheses) for this experiment?
• What methods are you using to test this (or each) hypothesis?
Section II: Data and Observations
• Locate the data and observations collected in your lab guide. What are the key results? How would you best summarize the data to relate your findings?
• Do you have quantitative data (numerical results or calculations)? Do you have qualitative data (written observations and descriptions)? How can you organize this date for your report?
Section III: Analysis and Discussion
• What do the key results indicate?
• If you constructed graphs, what trends do they indicate in your data?
• Were there any problems with the experiment or the methods? Did you have any surprising results?
Section IV: Conclusions
• What do the results tell you about your hypothesis(es)?
• How do the data support your claim above?
• If you could repeat the experiment and make it better, what would you do differently and why?
Just putting a comment here, I needed to test something