Answer:
2 vials
Explanation:
The concentration (C) of the drug in the solution is:
C= 500 mg/5 mL = 100 mg/mL
Each vial with a volume (V) of 10 mL, contains the following mass of drug:
V= 10 mL ⇒ C x V = 100 mg/mL x 10 mL = 1000 mg
As you need 2.00 g, and 1 gram is equivalent to 1000 mg, the mass needed is 2.00 g x 1000 mg/1 g = 2000 mg
Thus, you have to divide the mass you need into the mass of each vial:
(2000 mg)/(1000 mg/vial) = 2 vials
Therefore, you need 2 vials.
Help me thank you....
Answer:3
Explanation:
it is b
Answer:
The correct answer is . . . "B" .
♡ ( i just got the answer from that other dude- ) ♡
Explanation:
plzz!!! I need help now
this is science
When an electron falls from an excited state to ground state, is energy released or absorbed?
Answer:
Energy is released.
Explanation:
When an electron absorbs energy, it moves up into an excited state. When it releases energy, it will return to the ground state.
what are 3 atoms that have 4 valence electrons?
What is the molar volume of a gas at standard temperature and pressure? 1.0L, 2.4L, 11.2L 22.4L
Group 13 elements tend to acquire which charge when they form ions?
-3
+5
+3
-5
Answer:
-0
Explanation:
Ello fellers
A chemical change is also known as a:
1.endothermic reaction
2.exothermic reaction
3.solution
4.chemical reaction
Weather includes such conditions as air pressure, wind, _____, and moisture in the air.
Answer:
Weather includes such conditions as air pressure, wind, temperature , and moisture in the air.
ILL PAYPAL YOU 10$ FOR THIS
Answer:
Really $10?
Explanation:
Answer:
I DONT have paypal ok amd which grade are you
when telling the steps in a scientific investigation, they should be relayed in such a way that the audience _______ .
Answer: Im pretty sure its C. or can exactly replicate the procedure
Explanation:
Answer:
it's c I took the test on my but
A brown rabbit is easily hunted and killed in an arctic ecosystem. Which would be expected to appear most often future generations born in the same ecosystem?
A. brown rabbits
B. gray rabbits
C. white rabbits
D. an even mix of brown, gray, and white rabbits
Answer:
D..................ig
How much heat is required to raise 36 g ice at – 10.0oC to steam at 110oC? (get your answers from question #1)
a) Amount of heat to go from –10.0oC to 0.00oC (solid, no phase change)
Answer:
The total heat required to raise ice at -10°C to steam at 110°C = 91606.8 J
Explanation:
The heat involved in this process involves the following:
1. Heat to change ice at -10°C to ice at 0°C;
2. Heat to change ice at 0°C to water at 0°C
3. Heat to change water at 0°C to water at 100°C
4. Heat to change water at 100°C to steam at 100°C
5. Heat to change steam at 100°C to steam at 110°C
Specific heat capacity of ice, c = 2040 J/K/kg, Latent heat of fusion of ice, L = 3.35 × 10⁵ J/kg, specific heat capacity of water, c = 4182 J/K/kg, latent heat of vaporization of water, l = 2.26 × 10⁶ J/kg, specific heat capacity of steam, c = 1996 J/K/kg
Step 1: H = mcθ; where m = 30.0 g = 0.03 g, c = 2040 J/K/kg, θ = (0 - -10) = 10 K
H = 0.03 * 2040 * 10 = 612 J
Step 2: H = mL, where L = 3.35 × 10⁵ J/kg
H = 0.03 * 3.35 × 10⁵ = 10050 J
Step 3: H = mcθ, where c = 4182 J/K/kg, θ = (100 - 0) = 100 K
H = 0.03 * 4182 * 100 = 12546 J
Step 4: H = ml, where l = 2.26 × 10⁶
H = 0.03 * 2.26 × 10⁶ = 67800 J
Step 5: H = mcθ, where c = 1996 J/K/kg, θ = (110 - 100) = 10 K
H = 0.03 * 1996 * 10 = 598.8 J
Total heat required to raise ice at -10°C to steam at 110°C = (612 + 10050 + 12546 + 67800 + 598.8) J = 91606.8 J
Therefore, the total heat required to raise ice at -10°C to steam at 110°C = 91606.8 J
A wave has a wavelength of 1.2 m and frequency of 3 Hz what is the wave speed
Answer:
Speed of wave = 3.6 m/s
Explanation:
Given data:
Wavelength of wave = 1.2 m
Frequency = 3 Hz
Speed of wave = ?
Solution:
Formula:
Speed of wave = wavelength × frequency
by putting values,
Speed of wave = 1.2 m × 3s⁻¹ (Hz = s⁻¹)
Speed of wave = 3.6 m/s
An independent variable is what you___in an experiment. (There are no selections so please just answer it)
Answer:
Don’t change, keep the same
Explanation:
Thallium-208 has a half life of 3.053 minutes. How much of a 78.7g sample is left after 25 minutes?
Answer:
0.31 g
Explanation:
N/No = (1/2)^t/t1/2
N= Amount of radioactive isotope at time t
No= Amount of radioactive isotope originally present
t= time elapsed = 25 minutes
t1/2 = 3.053 minutes
N/78.7 = (1/2)^25/3.053
N/78.7 = (1/2)^8
N/78.7 = 1/256
256 N = 78.7
N= 78.7/256
N= 0.31 g
The crack shown in the lithosphere was created by the movement of two or more tectonic plates. What is this crack called
Answer:
The lithosphere is made up of pieces of tectonic plates. These plates are constantly changing and move towards the mantle. Non-stop movement of tectonic plates causes stress on the earth's outermost layer i.e,the crust. When these stresses extends it leads to cause cracks called faults.
Explanation:
what evidence is there of energy release after chemical reaction
Answer:
loss of mass
Explanation:
your welcome :)
Lab: Acids and Bases Assignment: Lab Report
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?
Answer:
Lab: Acids and Bases Assignment: Lab Report
The main point is to help the scientific method and to also see how it works.Sometimes people refer to the tentative answer as "an educated guess." Keep in mind, though, that the hypothesis also has to be testable since the next step is to do an experiment to determine whether or not the hypothesis is right! A hypothesis leads to one or more predictions that can be tested by experimenting.>State the hypotheses. Every hypothesis test requires the analyst to state a null hypothesis and an alternative hypothesis. The hypotheses are stated in such a way that they are mutually exclusive. That is, if one is true, the other must be false; and vice versa.>Formulate an analysis plan. The analysis plan describes how to use sample data to accept or reject the null hypothesis. It should specify the following elements.>Analyze sample data.Using sample data, perform computations called for in the analysis plan.>Interpret the results. If the sample findings are unlikely, given the null hypothesis, the researcher rejects the null hypothesis. Typically, this involves comparing the P-value to the significance level, and rejecting the null hypothesis when the P-value is less than the significance level and etc.Section II: Data and Observations
In a lab guide, the key results are those that support my working hypotheses or serve to reject these assumptions. Moreover, the key results may also be other discoveries that are important to understand the processes and/or mechanisms investigated in the experiment.•?
Section III: Analysis and Discussion
Key Results are the measures and milestones that indicate how you know you will accomplish our Objective.A linear pattern is a continuous decrease or increase in numbers over time. On a graph, this data appears as a straight line angled diagonally up or down (the angle may be steep or shallow). So the trend either can be upward or downward.Yes, i was surprised and learn so much and it was no problem.Section IV: Conclusions
Results will tell you which hypothesis is true.describe specific part of the procedure.If I were able to repeat the lab and do it differently I would try to do two different things to improve it. I would try to create the model in a simpler manner that allowed me to better see how the erosion factored in. I would also try to take more detailed notes on it if I were to repeat it.i hope it's helpAnswer:
anyone know the section II answers for a lab like this but its the thermal energy transfer lab
Explanation:
^^
can someone right my lab report for mee
How does Cyanoacrylate compare to the elements that make it up?
Answer: The elements of the cyanoacrylate are different as compared to the main cyanoacrylate.
Explanation:
The cyanoacrylate is a adhesive water based substance. It is used for developing fingerprints by fuming method. It is the acrylic monomer which has property to develop into a plastic form after application another of its composition is the acrylic resin which imparts adhesiveness to the cyanoacrylate.
Under Organic compound
Please draw the structure of this compound
3,3-diethyl-2-methyl heptane?
Answer:
SEE ATTACHMENT- GRADED AT 100%
Explanation:
A compound has an empirical formula of SO3 and a molecular mass of 152. What is the molecular formula?
Answer:
Molecular formula = S₂O ₆
Explanation:
Given data:
Empirical formula = SO₃
Molecular formula = ?
Molecular mass = 152 g/mol
Solution:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
Empirical formula mass = 80 g/mol
n = 152 g/mol / 80 g/mol
n = 2
Molecular formula = n (empirical formula)
Molecular formula = 2(SO₃)
Molecular formula = S₂O ₆
Which object has the greatest inertia
Answer:
D
Explanation:
lighter objects have higher inertia
What would be another good title for this passage mood and tides, the moons of our solar system, the moon phase is in order, benefits of knowing the moon phases
Here is the picture to the reading of the question
what's the formula mass of barium iodide
Answer:
BaI2
Explanation:
Which is a statement of the second law of thermodynamics?
O A. Entropy tends to increase in a system.
O B. Molecular motion stops at absolute zero.
O C. The net reaction rate is zero at equilibrium.
O D. Energy cannot be created or destroyed.
Answer:
A: Entropy tends to increase in a system
Which is a statement of the second law of thermodynamics?
O A. Entropy tends to increase in a system.
O B. Molecular motion stops at absolute zero.
O C. The net reaction rate is zero at equilibrium.
O D. Energy cannot be created or destroyed.
ITS A
What steps should you take to respond to an
accident?
Notify the teacher immediately.
Notify the teacher only if the accident was not
your fault
Immediately wash off any chemicals on skin
or eyes with cool running water.
Remain calm and help others remain calm.
Pick up any broken glass and throw it in the
trash.
Answer:
Notify the teacher immediately.
Immediately wash off any chemicals on skin or eyes with cool running water.
Remain calm and help others remain calm.
Explanation:
Just did it on edge
Response to an accident can be made by informing the teacher, washing off chemicals ,being calm and picking of broken glasses.
Thus option A,C,D and E are correct.
What safety precautions are to be followed in laboratory?
While working in labs it is of utmost importance to work carefully while handling chemicals and glassware apparatus. In some unforeseen circumstances where accidents take place while working in labs it should be notified to the authorities immediately.
In case there is a spill of chemicals on skin or eyes it should be immediately washed under running water as the chemical spilled can cause irritation to the skin or eyes.In case of accidents it is advised to remain calm and calm others as well.
If there is a breakage of glassware it should be immediately be thrown away in the trash as the glass can pierce into the skin and cause injury.
To learn more about precautions in laboratories click here:
https://brainly.com/question/10900782
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Explain how scientists know the composition of the bottom layer of the crust?
Helium is a colorless gas that does not react with other elements. Using what you know about valence electrons, which other elements would you expect to have similar properties as Helium? Explain.
Answer:
Neon, Argon, Krypton, Xenon and Radon
Explanation:
The other elements that would be expected to have similar properties as the Helium from the periodic table are the noble gases.
The noble gases are a special group of elements belonging to the last group of the periodic table.
They are called the O group or inert group because elements in this group do not combine with other atoms due to their completely filled outermost shell.
This makes them unreactive and do not readily combine with other atoms.
Please help me I’m struggling!!
I’ll mark brainliest!!
CHEMISTRY
Answer:
the 4th one
Explanation:
2NACL 2NA + CL2
Answer:
It's B, the previous answer is wrong
Explanation:
