The activity of the sample when it was shipped from the manufacturer is 4.54 mCi
How to determine the number of half-lives that has elapsedFrom the question given above, the following data were obtained:
Time (t) = 48 hoursHalf-life (t½) = 14.28 days = 14.28 × 24 = 342.72 hours Number of half-lives (n) =?n = t / t½
n = 48 / 342.72
n = 0.14
How to determine the activity of the sample during shipping Number of half-lives (n) = 0.14Original activity (N₀) = 5.0 mCiActivity remaining (N) =?N = N₀ / 2ⁿ
N = 5 / 2^0.14
N = 4.54 mCi
Thus, the activity of the sample during shipping is 4.54 mCi
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Answer:
I'm sorry if this isn't right but I think its Bromine? Lithium Bromide is an ionic bond, but the others don't bond with Lithium. Let me know if I am wrong.
Explanation:
A female spinach plant with flat (Ff) leaves is crossed with (pollination and fertilization occur) a male spinach plant with crinkly (ff) leaves. Explain what genes and traits the offspring will inherit. (Use the punnett square from your previous questions)
Your explanation should:
Identify the type of reproduction.
Compare the genetic variation among offspring (cause and effect)
Include a model to support your written response.
PLEASE HELP 100PTS
Answer:
the genes and traits of the offspring is a 50/50 chance.
Explanation:
The type of reproduction has 2 parents involved
Which of the following is a stock exchange in the United States?(1 point)
U.S. Public Investment Exchange
U.S. Public Investment Exchange
Universal Partnership Exchange
Universal Partnership Exchange
New York Stock Exchange
New York Stock Exchange
Securities and Exchange Commission
Answer:
here are all the answers to this quick check
Explanation:
1. owners have limited liability for debt.
2. A small restaurant chain, founded and operated by a single family, is owned by shareholders who purchase their shares on the stock exchange.
3. New York Stock Exchange
4. The regulations will be more burdensome than in other business structures.
5. Stocks are units of ownership in a corporation, while bonds are certificates of debt.
Hope this helps :)
New York Stock Exchange (NYSE) is the stock exchange in the United States. Option C is correct.
The New York Stock Exchange (NYSE) is one of the world's largest and most well-known stock exchanges. It is located in New York City and is a primary venue for buying and selling a wide range of financial instruments, including stocks, bonds, exchange-traded funds (ETFs), and other securities. The NYSE provides a platform where buyers and sellers come together to trade these financial instruments in a regulated and transparent manner.
The Securities and Exchange Commission (SEC) is not a stock exchange itself but rather a regulatory agency in the United States responsible for overseeing and enforcing federal securities laws. The SEC ensures that the securities markets operate fairly and efficiently and that investors are provided with accurate and timely information about investment opportunities and risks.
Hence, C. is the correct option.
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(SCIENCE)
We know that trees existed millions of years ago because of the existence of ____, which is fossilized tree resin.
A. Amber
B. Coal
C. Shale
D. Slate
WILL MARK BRAINLIEST FOR THE CORRECT ANSWER
if a liquor law is violate the liquor authority can issue a citation today
If a liquor law is violated, the liquor authority can issue a citation of fine. The other consequence of liquor law violation is Liquor- license suspension.
What is liquor law?Liquor law is also called Alcohol laws. Alcohol laws are the laws which are related to the manufacture, use and the sale of alcohol or alcoholic beverages that contains ethanol. If this law is violated, the liquor authority can issue a fine as well as the suspension of Liquor- license so we can conclude that fine and Liquor- license suspension are the consequences of violation of liquor law.
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How many atoms are in 48.8 g of pure aluminum?
there are 1023 atoms in pure aluminium
The degree of contrast between two opposing forces is called______?
Answer:
polarity
Explanation:
Which subatomic particle is directly involved in the bonding of atoms
Answer:
electrons
Explanation:
Of the three subatomic particles, electrons are most involved in forming chemical bonds.
What does an electroscope do?
It adds electrons to an object
It detects negative static electricity when protons are drawn down into the
leaves of an electroscope, causing the leaves to repel one another and move
apart.
It calculates the amount of electrons in an object therefore knowing what kind of
element something is
Electroscopes do not exist, they are a Hollywood Sci-Fi creation
Answer:
It detects negative static electricity when protons are drawn down into the
Explanation:
electroscope, instrument for detecting the presence of an electric charge or of ionizing radiation, usually consisting of a pair of thin gold leaves suspended from an electrical conductor that leads to the outside of an insulating container.
10000 g = 1 kg
Group of answer choices
this is a correct equality
this is an incorrect equality
Answer:
This is an incorrect equality
Explanation:
There is 1000g in 1 kg
How does a fire extinguisher stop a combustion reaction?
[tex] \: \huge\begin{gathered} {\underline{\boxed{ \mathcal{\orange{Answer}}}}}\end{gathered}[/tex]
Carbon dioxide is heavier than air and does not support combustion. Carbon dioxide extinguishes fire by displacing oxygen or by taking away oxygen from the fire triangle.
Carbon dioxide is also very cold when it comes out of the extinguisher.
Thus, it reduces the temperature of the fuel as well.
list the following gases in order of increasing average molecular velocity
I hope this will help !!!
You will need to prepare 12 mL of 25% Sodium Phosphate Buffer (pH 4) solution for Activity 2. What volume of the stock Sodium Phosphate Buffer and Water will you need to measure out
Assuming the concentration of stock solution is 50% sodium phosphate buffer solution, the volume of stock solution required is 6 mL and the volume of water required is 6 mL.
What volume of a stock Sodium phosphate buffer and water is needed to 12 mL of 25% sodium phosphate buffer of pH 4?The process of preparing solutions from stock solutions of higher concentration is known as dilution.
Dilution is done with the aid of the dilution formula given below:
C1V1 = C2V2where
C1 is the concentration of stock solutionV1 is the volume of stock solution required to prepare a diluted solution C2 is the concentration of the diluted solution preparedV2 is the final volume of the diluted solutionFrom the data provided:
C1 is not given
V1 is unknown
C2 = 25%
V2 = 12 mL
Assuming C1 is 50% solutionVolume of stock, V1, required is calculated as follows:
V1 = C2V2/C1
V1 = 25 × 12 /50
V1 = 6 mL
Therefore, the volume of stock solution required is 6 mL and the volume of water required is 6 mL.
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Balance the following chemical equation (if necessary):
C6H6 (I) + O2(g) → H2O(g) + CO2 (g)
[tex]\\ \sf\longmapsto 2C_6H_6+15O_2\longrightarrow 6H_2O+12CO_2[/tex]
On reactant side
C=12H=12O=30On products side
C=13O=30H=12Hence balanced
what is the mathematical relationship between the independent and dependent variables? Justify your answer.
Answer:
The independent variable influences change in the dependent variable whether the points on the scatterplot go up or down from left to right.
Explanation:
waves in the ocean are 6m apart and pass a surfer every 2 s. what is the wave speed
[tex]\\ \tt\hookrightarrow Speed=\dfrac{Distance}{Time}[/tex]
[tex]\\ \tt\hookrightarrow Speed=\dfrac{6}{2}[/tex]
[tex]\\ \tt\hookrightarrow Speed=3m/s[/tex]
Answer:
Given, Distance travelled(d)=6m
Time taken(t)=2sec
Speed(s)=?
We know that,
[tex] \purple {speed(s) = \frac{distance \: travelled(d)}{time \: taken(t)}} [/tex]
[tex] \purple{speed(s) = \frac{6m}{2sec} }[/tex]
[tex] \purple{speed(s) = 3 m /s}[/tex]
2,2-dichlorohexane 4 , 4 Give two reason, explain why 2,2-dichloro-3-methylbutane has structure isomer of 2, 2 dichloropentane.
Answer:explain why 2,2-dichloro-3-methylbutane has structure isomer of 2, 2 dichloropentane. Although there are 12 hydrogen atoms in the molecule, there only 4 possible 1H chemical environments for the hydrogen atoms in 2-methylbutane molecule.
Explanation:
Ammonia reacts with fluorine gas according to the thermochemical equation given
below. Calculate the heat transferred, in kJ, when 34.0g of ammonia reacts with 190.0g
of fluorine. Will this heat be released or absorbed? Briefly explain your reasoning.
NH3 (g) + 3F2 (g) → NF3 (g) +3HF (g)
AH°rxn = -881.2 kJ
Heat transferred is already given in the question
∆H_rxn=-881.2kJAs ∆H is negativeThe reaction is endothermic and 881.2kJ of heat is absorbed .Of the bonds listed below the weakest bond is _______ and the strongest is ________. A strong bond is a (stable / unstable) bond
2(H—C ≡ C—H) + 5(O = O) → 4 (O—C—O) + 2 (H—O—H)
839 kJ/mol C ≡ C # of bonds ______ (product / reactant) side Energy:_____
495 kJ/mo O = O # of bonds ______ (product / reactant) side Energy:_____
413 kJ/mo C—H # of bonds ______ (product / reactant) side Energy:_____
I need help with this. I am a Learning Coach and I don't understand.
Based on the data given of the bonds listed below, the weakest bond is C-H and the strongest bond is C ≡ C.
A strong bond is a stable bond.
Which of the bonds listed is the weakest and which is the strongest?The strength of a bond is proportional to the amount of energy required to break or form the bond.
A weak bond will require less energy to form than a strong bond.
A weak bond is unstable while a strong bond is stable.
Data provided:
839 kJ/mol C ≡ C
495 kJ/mo O = O
413 kJ/mo C—H
From the data given of the bonds listed below, the weakest bond is C-H and the strongest bond is C ≡ C.
A strong bond is a stable bond.
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What happens when a glass of water is set in the sun until the water
evaporates?
A. Activation energy increases.
B. Enthalpy decreases.
C. Condensation increases.
D. Entropy increases.
Answer:
D is the answer
Explanation:
A piece of metal is cooled in a water calorimeter. This process increases the water temperature by 7.0°C. How much energy is lost if there is 100. g of water in the calorimeter? (specific heat of water is 4.184 J/g°C)
Heat changes
Q = m.c.Δt
Q = 100 g x 4.184 J/g°C x 7 °C
Q = 2928.8 J
Which substance dissolves most readily in gasoline?
A)CH4
B) NaOH
C) NaBr
D) HCl
Answer:
A. CH4
Explanation:
A reaction is occurring in a test tube. How is heat transmitted to the surroundings?
(A) Heat is carried out with matter as matter is changed with the surroundings.
(B)As bubbles are formed and gas escapes, the heat is carried with the rising bubbles.
(C) All of the heat escapes out of the open top of the test tube as molecules collide with the air
(D) Molecules collide with the glass, and the glass molecules then transmit that energy to the outside.
Heat is transmitted to the surroundings as follows: molecules collide with the glass, and the glass molecules then transmit that energy to the outside.
WHAT IS HEAT TRANSFERHeat energy is lost when molecules collide in a chemical reaction.
According to this question, a reaction is occuring in a test tube. The reaction involves a collision of molecules that results in the loss of heat energy.
This energy is transmitted to the surroundings as follows when molecules collide with the glass, and the glass molecules then transmit that energy to the outside.
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Answer:
Explanation:
1)inside the fume hood
2)an erupting volcano
3)many molecular collisions occurring quickly
4)Molecules collide with the glass, and the glass molecules then transmit that energy to the outside.
5)Heat and matter can both transfer between the system and the surroundings.
A gamma ray has a frequency of 2.88 x 1021 Hz. What does this mean?
Answer:
A gamma ray has a frequency of 2.88 x 10^21 Hz. What does this mean? It is how fast the wavelength is moving and is the number of how many pass a certain in a second. How does light emitted from a neon sign differ from light from the sun? Neon light only emits certain colors while sunlight emits all colors.
Explanation:
A gamma ray has a frequency of 2.88 x 10^21 Hz. What does this mean? It is how fast the wavelength is moving and is the number of how many pass a certain in a second. How does light emitted from a neon sign differ from light from the sun?
For a concave mirror, incident light beams through C will reflect:
(a) back through C
(b) through F
(c) parallel to PA
Answer:
c
Explanation:
hi there, giving brainliest to best answer. no spammers
Answer:
D. Earth's northern hemisphere is tilted toward the Sun
Explanation:
You can see in the picture above that the northern hemisphere is past the perpendicular to orbit line to the right.
What does the law of multiple proportion account for?
○ Subscripts in chemical formulas
○ Direction of the arrow in chemical equations
○ Coefficients in chemical equations
○ Coefficients in chemical formulas
The law of multiple proportion account for subscripts in chemical formulas (option A).
What is law of multiple proportion?The law of multiple proportion states that when two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.
For example, nitrogen dioxide and nitrogen tetroxide have nitrogen to oxygen ratios of 1:2 and 1:4.
This suggests that the law of multiple proportion addresses the subscripts in chemical formulas.
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Answer:
○ Subscripts in chemical formulas
Explanation:
During photosynthesis, carbon dioxide, water, and energy react to form glucose and oxygen. Which line would be longer on the energy graph for photosynthesis? (1 point)
Answer:
The vertical line indicating bonds breaking
Explanation:
Answer:
The answer is B. the vertical line indicating
Explanation:
Relative Potential Energy 2 Quick Check %100 5/5
1. Which type of chemical reaction results in the absorption of energy?
C. endothermic
2. Which type of chemical reaction occurs when natural gas is burned?
D. exothermic
3. Which part of an energy graph is represented by the highest point?
D. the activated state
4. During photosynthesis, carbon dioxide, water, and energy react to form glucose and oxygen. Which line would be longer on the energy graph for photosynthesis?
B. the vertical line indicating bonds breaking
5. The dissolution of calcium chloride in water is given by the following equation:
CaCl2(s) + 2H2O → Ca(OH)2(aq) + 2HCl(g) + heat
How would an energy graph of this reaction appear?
D. The reactants would appear at a higher energy state than the products
What is linear expansion
Answer:
Thermal expansion is the tendency of matter to change its shape, area, volume, and density in response to a change in temperature, usually not including phase transitions. Temperature is a monotonic function of the average molecular kinetic energy of a substance.
Select the structure that corresponds
to the name:
N, N-diethylpropanamide
Answer:
B
Explanation:
