Answer:
B, increases rate of collisions
Explanation:
The table shows the amount of radioactive element remaining in a sample over a period of time.
Radioactive Decay Rate
Amount of Radioactive Sample(grams)
45.0
31.8
22.5
15.9
11.3
Time(years)
0
11
22
33
44
Part 1: What is the half-life of the element? Explain how you determined this.
Part 2: How long would it take 308 g of the sample to decay to 4.8125 grams? Show your work or explain your answer
1. The half-life of the element is 22 years
2. The time taken for 308 g of the sample to decay to 4.8125 g is 132 years
Definition of half-lifeHalf-life is simply defined as the time taken for half of a material to decay.
1. How to determine the half-life Original amount (N₀) = 45 gHalf of the original amount = 45 / 2 = 22.5 gFrom the diagram, the time for 22.5 g is 22 years.
Thus, the half-life of the element is 22 years
2. How to determine the time i. Determination of the number of half-lives Original amount (N₀) = 308 gAmount remaining (N) = 4.8125 gNumber of half-lives (n) =?2ⁿ = N₀ / N
2ⁿ = 308 / 4.8125
2ⁿ = 64
2ⁿ = 2⁶
n = 6
ii. Determination of the time Number of half-lives (n) = 6Half-life (t½) = 22 yearsTime (t) =?t = n × t½
t = 6 × 22
t = 132 years
See attached photo for diagram
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Identify the geological feature that results when the tectonic plates move apart.
1.volcanoes
2.mountains
3.earthquakes
4.rift valleys
Answer:
Rift valleys
Explanation:
An example is the Great Rift Valley in Africa. As plates move apart, they leaves a gap in the crust.
Alkali metals are not reduced,why?
Alkali metals are not reduced because they are obtained by chemical reduction of their oxides.
What does the law of conservation of energy imply?
O A. That energy within matter can never be released
O B.
B. Tihin atoms will always combine to give off energy
Tuhin atoms
O c. That energy can only be converted between different forms
O D. That kinetic energy can only be converted to heat
Answer:
B. That energy can only be converted between different forms
Explanation:
The law of conservation of energy implies that energy can only be converted between different forms but can neither be created nor destroyed.
Energy is the ability to do work. It is very important physical quantity that is essential to all life forms.
Energy according to the law of conservation of energy is not produced neither is it destroyed.
Energy is simply transformed from one form to another.
what data can be used to make a model of food?
Answer: the density of the object / the mass it takes to stand up.
Explanation:
What would you ask the scientists that came up with the big bang theory?
Answer:
What is the name of the drug you were talking at the time of coming up with this theory please?
What would be the answer could someone please help me?
Answer:
I think the answer could be A.
Explanation:
But i'm not sure.
Which of the following is not one of covalent bonds that indicate the presence of H-bond capabilities?
H-O
H-N
H-C
H-F
Answer:
option a) H-H is the correct answer
Explanation:
mark brainly or ur a weirdo
The release of water vapor from sweat glands when we are not sweating is a process called:.
From what we know, we can confirm that the release of water vapor from sweat glands when we are not sweating is a process called insensible perspiration.
What is insensible perspiration?This is a process by which we emit water in the form of vapor from our skin. This process is not to be confused with normal sweating. This happens at a near-constant rate in the human body and is not perceivable. The loss of water through this method also helps the body to maintain its homeostasis levels.
Therefore, we can confirm that the release of water vapor from sweat glands when we are not sweating is a process called insensible perspiration.
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A simple sugar is composed of equal parts carbon and water, which gave rise to the general name of any sugar as a.
Answer:
Identify the disaccharide that fits each of the following descriptions: a. not a reducing sugar b. composed of two glucose units c. also called milk sugar d. hydrolysis gives glucose and fructose
Determine the molarity of a solution with a volume of 435. mL and 0.550 mol of solute dissolved.
Answer:
M = 1.26
Explanation:
Molarity = mole of solution/liters of solution
435mL/1000 = .435L
Plugging in the numbers into the formula, we get:
Molarity = .550 mol/.435L = 1.26 M
Geologic time begins with a very long span called Precambrian Time. Precambrian Time ended about 544 million years ago. Scientists have organized geologic time into chunks. The chunks of time span different lengths. Using the model, organize the basic units of geologic time in order from longest to shortest.
Answer:
geologic time, the extensive interval of time occupied by the geologic history of Earth. Formal geologic time begins at the start of the Archean Eon (4.0 billion to 2.5 billion years ago) and continues to the present day.
Explanation:
Chemical weathering would be most effective ________.
Explanation:
Chemical weathering is most effective when water is present.
products formed when a candle burns
Answer:
If you could look down into the flame, you'd see that oxygen molecules from the air interact with wax molecules and have a chemical reaction. And the products of the reaction, that means the stuff that's produced, is water vapor, carbon dioxide gas, and heat, and light.
Hope This Helps
Which is the largest number expressed below?
a. 0.1 km
b. 1,000 cm
C. 10.000 mm
Answer:
A. 0.1 km
Explanation:
0.1 km is equal to 10,000 centimeters.
hope this helps!
What is the empirical formula for CH2OHCH2OH?
Answer:
CH3O
Explanation:
When cleaning a buret, begin by coating the inside with:.
Answer:
I think the answer is distilled water...
Explanation:
One reaction step in the conversion of ammonia to nitric acid involves converting NH3 to NO by the following reaction:
4 NH3(g) + 5 O2(g) --> 4 NO(g) + 6 H2O(g)
If 1.50 g of NH3 reacts with 2.75 g O2, then:
1. Which is the limiting reactant?
2. How many grams of NO and H2O form?
3. How many grams of the excess reactant remain after the limiting reactant is completely consumed?
the answer would be 2.75 x 4 nh3
An unknown liquid has a mass of 30.8 g, and a volume of 31.5 mL. What is the density of this liquid?
The density of the liquid is 0.98 g/mL
What is density?The density of a substance is defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as:
Density = mass / volume
With the above formula, we can obtain the density of the liquid.
How to determine the density Mass = 30.8 gVolume = 31.5 mL Density =?Density = mass / volume
Density of liquid = 30.8 / 31.5
Density of liquid = 0.98 g/mL
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naming compounding
N2O
Answer:
Nitrogenous oxide/ nitrogen oxide
Explanation:
N2O is nitrogen oxide
Examine the snapshot of sedimentary layers shown here. Which statements accurately describe the relationship between these organisms? Select ALL that apply. A) Species B is more primitive than species C. B) Species A is more primitive than species B. C) Species C is more primitive than species B. D) Species B is more primitive than species A. E) All three species likely lived at the same time.
Answer:
The answer is: Species A is more primitive than species B.
Explanation:
Species A has worse genetics than all the other fishes.
Which statement is true?
Ozone is always good because it is made from oxygen.
Ozone is good in the stratosphere and bad at ground level.
Ozone is bad no matter where it is.
Answer: the second one for sure HOPE IT HELPD HAVE A AWSOME DAY :))))))))
Explanation:
Which of the following types of energy is potential energy?
Answer:
if you would like a proper answer you need to give us the options otherwise we can't help you?
Explanation:
The relative atomic mass of an element is the mass of its atoms compared with that of which
element? Give the name, not the symbol.
The relative atomic mass of an element is compared with the mass of an atom of carbon-12.
Carbon-12 is chosen as the reference because it has a mass of exactly 12 atomic mass units (amu). The relative atomic mass, also known as atomic weight, provides a standard for comparing the masses of different elements.
It is calculated based on the weighted average of the masses of an element's naturally occurring isotopes, taking into account their abundance. By using carbon-12 as the reference, scientists establish a consistent scale for expressing atomic masses.
This standardization is essential for accurately conveying the mass of atoms in a way that is universally understandable and comparable across various elements and compounds.
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#SPJ3
Please help! not sure what this is asking.
Answer:
The question is asking for you to type the formulas into the adjacent boxes. It wants you to be familiar with correctly typing formulas and using the underscore to type subscripts (the numbers that are smaller and are positioned lower than the letters). So, type out the formulas given into the boxes.
Na₂CO₃ would be typed as Na_2CO_3
Al₂(SO₄)₃ would be typed as Al_2(SO_4)_3
Changes to Earth's Surface
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The image below shows part of a rounded ridge formation called an esker. This esker extends for several miles in an area that is
mostly flat plains. At one time, this ridge shape was occupied by a stream that flowed underneath a large glacier
Which of the following describes how the esker most likely formed?
ОА
As the glacier receded, the sediments in the stream built up to result in the formation
Св.
The glacier eventually melted and the water eroded the areas on both sides of the ridge
C. As the glacier receded, tectonic forces formed volcanoes, which spewed lava and formed igneous rock
4 of 10 Answered
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Answer: As the glacier receded, the sediments in the stream built up to result in the formation.
Explanation: study island
As exact conversions, the following information is known:
1 mile = 5280 ft.
12 in. = 1 ft.
3 ft. = 1 yard
1 hr = 60 min
1 day = 24 hr
A particular species of bird can fly for 36.0 hours straight, covering a distance of 158 miles. At this rate, how many feet does the bird travel in 43.0 min?
Answer:
16607 and 5/9 feet
Explanation:
First, let's find the how fast the bird travels in an hour. Finding the miles per hour: 158/36=79/18. Convert this to miles per minute to find the distance after 43 mins. Multiplying 79/18 by 1/60, 79/1080. Multiplying this by 43 to find the distance traveled; 3397/1080. As 1 mile is equal to 5280 feet, multiply by 5280 to find distance in feet. Once this is all done, you get 149468/9, or 16607 and 5/9 feet.
A particular species of bird can fly for 36.0 hours straight, covering a distance of 158 miles. At this rate, how many feet does the bird travel in 43.0 min
happy birthday zion...
Explain how nitrogen oxides released into the atmosphere can lead to the formation of a secondary pollutant that can lead to acid deposition.
Nitrogen oxides react with oxygen and rainwater to form nitric acid a secondary pollutant which dissolves in water droplets forming acid rain.
What is a secondary pollutant?A secondary pollutant is a pollutant which results from changes that occur in an initial pollutant known as the primary pollutants.
Pollutants pose dangers to plant and animals found in a given environment.
The primary pollutant, nitrogen oxides, which are released into the atmosphere from industrial and vehicular smoke can be changed into a secondary pollutant.
Nitrogen oxides react with oxygen and rain to form nitric acid a secondary pollutant.
Nitric acid (HNO3) then enter the environment through the ground as droplets in rain forming acid rain.
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Can anyone explain to me the octet rule in detail with examples my teacher didn't do the greatest job of making us understand.
What is the molarity of a solution when 2. 75 g of nacl is dissolved in 1100 ml of solution.
