What is the difference between endothermic reactions and exothermic reactions? (Please describe both types of chemical reactions.)
Answers
Answer:
Explanation:
Endothermic reactions absorb energy from the surrounding, but exothermic reactions release energy to the surrounding.
Related Questions
The circulatory system is responsible for which of the following?
I. bringing oxygen to your cells
II. bringing nutrients to your cells
III. bringing carbon dioxide to your cells
I only
I and III only
I and II only
I, II, and III
EXPLAIN
Answers
Answer:
I, II
Explanation:
The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
which phrase describes air pressure O decreases with denser air O decreases as altitude decreases O equals mass divIded by Volume O decreases as a result of fewer air particles pushing down
Answers
Air pressure decreases as altitude decreases. This phenomenon occurs because the atmosphere's density diminishes with increasing height above the Earth's surface and the correct option is option 2
As one ascends to higher altitudes, there are fewer air particles above, leading to a decrease in air density. Consequently, the pressure exerted by the air decreases at higher elevations.
Conversely, at lower altitudes, the air is denser due to the larger number of air particles above, resulting in higher air pressure. This relationship between air pressure and altitude is crucial for understanding weather patterns, climate changes, and the functioning of various natural processes on Earth.
Thus, the ideal selection is option 2.
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Which of the following best explains the relationship between peak-to-peak amplitude and semi-amplitude?
Answers
Answer:
A. Semi-amplitude is half the distance of the peak-to-peak amplitude
Explanation:
The correct answer is : The semi-amplitude is half the distance of the peak-to-peak amplitude (option A). The peak-to-peak amplitude is the total distance between the highest positive peak and the lowest negative peak in a waveform. It represents the full range of variation in the amplitude of the waveform.
The peak-to-peak amplitude of a waveform is the measurement of the total distance between the highest positive peak and the lowest negative peak. It provides information about the full range of variations in the amplitude of the waveform. Mathematically, it is calculated by subtracting the minimum value from the maximum value of the waveform.
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Rocks around mid-ocean ridges teach scientists about
A. how wide abyssal plains are
B. how earthquakes happen
C. changes in the earth's crust
Answers
plz download the doc and answer its due in 20 mins like bro wth
Answers
Answer:
and how do we know this is not a virus
Explanation:
sorry dude im just saying
Answer:
I agree with the comment above
sorry
Explanation:
HELP ASAP!! An experiment is performed in which a crystalline substance is added to a beaker filled with room-temperature water. The following observations were made:
1. The crystals dissolve.
2. A precipitate forms.
3. The bottom of the beaker feels warm to the touch.
4. Bubbles begin to form in the water.
Which observations are evidence that a chemical reaction took place?
Answers
Answer:
observations (2), (3), and (4) provide strong evidence that a chemical reaction occurred.
Explanation:
Observations (2), (3), and (4) are evidence of a chemical reaction because a precipitate formed, energy was released (the bottom of the beaker felt warm), and bubbles were formed in the water. Observation (1) indicates a physical change, not a chemical reaction.
What is NOT true about genes and chromosomes?
Genese are located on chromosomes
Chromosomes are in the nucleus
A single chromosome can contain hundreds of genes
All of these are true
Answers
Let us go option by option :
1) Genes are located in chromosomes. TRUE
Chromosomes are in cell nucleus. A chromosome contains hundreds and thousands of genes. A normal have 23 pairs of chromosomes, and a total of 46.
2) Chromosomes are the in nucleus.
TRUE
Chromosome is structure found in nucleus of the cell. It is made up of protein and DNA.
3) A single Chromosome can contain hundreds of genes.
TRUE
single Chromosome can contain hundreds of tgenes.
4) All of the above
TRUE
As all the statements above are true. The correct option is 4.
Answer:
all of them are true
Explanation:
this is because chromosomes contain genetic materials and it is present in the nucleus.
Therefore, the correct option is 4) all of these are true
no problem
what are all the non-metals element names? and what are there properties?
what are all the metalloids element names? and what are there properties?
Answers
Answer:
go to a pic of the periodic table and it's over th e stairs with is the metelliods and its 2 up then all the non metal on the right side above the mettoliods
In modern periodic table there are 22 non-metals in which there are 11 gases, 1 liquid and 10 solid. Bromine occurs in the state of liquid and hydrogen, nitrogen, oxygen, chlorine etc are found in gaseous forms. But carbon, sulphur, phosphorous, iodine etc solid non-metals.
WELL I DONT KNOW IF THIS WILL HELP BUT I FOUND THIS
what is the relationship between convince and suspect?
Answers
To convince someone means to persuade them to believe or do something. This involves gaining their trust and making them feel confident in your argument or proposal.
On the other hand, to suspect someone means to have doubts or distrust about their motives or actions. This involves questioning their credibility and being cautious about their intentions.
So, while convincing involves building trust and confidence, suspecting involves the opposite - doubting and being cautious.
Do question 4 thank u
Answers
Answer:
Mr. crabs conclusion is that after eating the patties, there breath will smell better.
Explanation:
Air pressure goes from areas of high pressure to areas of low pressure.
Group of answer choices
True
False
Answers
Answer:
true
give me brainliest pls
Sarah was watching the weather forecast on television. The high temperature for the day was to be 33°F and the relative humidity was at 93 percent. A fast moving cold front was moving in her direction. What type of weather should Sarah expect?
Answers
The high temperature for the day was to be 33°F and the relative humidity was at 93 percent. A fast moving cold front was moving in her direction. Winter weather should Sarah expect.
What is weather?The variety of activities that take place daily in our environment make up the weather. The weather varies around the globe and changes over the course of a few minutes, hours, days, and weeks. The troposphere, the region of Earth's atmosphere closest to the surface, is where most weather occurs.
Sarah was watching the weather forecast on television. The high temperature for the day was to be 33°F and the relative humidity was at 93 percent. A fast moving cold front was moving in her direction. Winter weather should Sarah expect.
Therefore, winter weather should Sarah expect.
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Answer the following!
Show your work!
Answers
HELP! 100 POINTS! A cinder block is pulled 0.50 meters to the right in 3 seconds. What is the block's average speed to the nearest hundredth of a meter per second (m/s)?
Answers
The average speed of the blocks are 0.36 m/S.
Explanation:
Average speed is defined as the ratio of distance covered per unit time. So if it is said that blocks are pulled to 0.9 m in the right side. This means the blocks cover a distance of 0.9 m from the origin and that distance is covered in 2.5 s. Thus, the average speed can be calculated from the change in speed
with respect to time. As at time t = 0, the speed is
also zero, and at time t = 2.5 s, the speed will be
Speed =
0.9 = 0.36
2.5
Since, in this case, the speed is equal to the average speed of blocks. So the average speed of the blocks will be 0.36 m/s.
2.5
Since, in this case, the speed is equal to the average speed of blocks. So the average speed of the blocks will be 0.36 m/s.
Which changes occur when Pt2+ is reduced? A) The Pt2+ gains electrons and its oxidation number increases. B) The Pt2+ gains electrons and its oxidation number decreases. C) The Pt2+ loses electrons and its oxidation number increases. D) The Pt2+ loses electrons and its oxidation number decreases.
Answers
Answer:
C
Explanation:
The process of respiration is like a(n) __________.
Press enter to interact with the item, and press tab button or down arrow until reaching the Submit button once the item is selected
A. Elemental reaction
B. Synthesis reaction
C. Combustion reaction
D. Decomposition reaction
Answers
Answer:
c.combustion reaction
1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL
Answers
To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.
Project on Gertrude B. Elton
Question + Context: She made medicine drugs like acyclovir and azathioprine (synthetic materials). What natural resources were used to make these?
Answers
Answer:
Oil, coal, natural gas, metals, stone and sand are natural resources. Other natural resources are air, sunlight, soil and water. Animals, birds, fish and plants are natural resources as well. Natural resources are used to make food, fuel and raw materials for the production of goods.
Answer:
1
Explanation:
The mass of Betelgeuse is about ___ times the mass of Vega
(This is not multiple choice.)
Answers
Therefore, the mass of Betelgeuse is about 17.634 kg/ 9.5 times the mass of Vega.
Vega is a main-sequence star located in the constellation Lyra. Betelgeuse is a red supergiant star located in the constellation Orion. The mass of Betelgeuse is observed to be about 20 times the mass of the Sun, while the mass of Vega is estimated to be about 2.1 times the mass of the Sun. Therefore, the mass of Betelgeuse is theoretically estimated to be around 9.5 times the mass of Vega.
Experimentally,
The mass of Betelgeuse is 2.188 x10^31 kg
The mass of Vega is 4.246 x 10^30 kg
Hence, the mass of Betelgeuse is about 17.634 kg/ 9.5 times the mass of Vega.
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Use the drop-down menus to identify each type of galaxy pictured.
Galaxy A:
Galaxy B:
Galaxy C:
Answers
Galaxy B: irregular
Galaxy C: spiral
Hope this can help
Calculate the mass of an object that has a density of 20 g/mL and a volume of 5 mL.
Answers
Answer:
4
Explanation:
density= mass/volume
Answer:
100kg
Explanation:
\(density= mass/volume\)
using this formula you can re arrange the equation my moving the volume onto the opposite side
giving you this formula : mass= density x volume
in doing so you can calculate the mass of the object by extracting the relevant information of the question
density=20g/ml
volume=5ml
mass = density x volume
=20 x 5
= 100
Jasmine has been reading about mixtures and how they can be classified.
After reading about the kinds of mixtures and their characteristics, she wants to know how a heterogeneous mixture is different from a homogeneous mixture. What is the main difference between these two kinds of mixtures?
A. In a heterogeneous mixture, the components are not evenly spread throughout the mixture. In a homogeneous mixture, the components are evenly spread throughout the mixture.
B. In a homogeneous mixture, the components are not evenly spread throughout the mixture. In a heterogeneous mixture, the components are evenly spread throughout the mixture.
C. In a homogeneous mixture, the components are easy to see and are well mixed so the components show up in different parts of the mixture.
D. In a heterogeneous mixture, the components are difficult to see and are spread out uniformly throughout the mixture.
Answers
Answer: The correct option is (In a heterogeneous mixture, the components are not evenly spread throughout the mixture. In a homogeneous mixture, the components are evenly spread throughout the mixture.)
Explanation: Have a good day :)
Answer: its A
Explanation:
I already did the test
atoms and molecules are made up of
Answers
Les atomes sont composés de protons, électrons et neutrons.
PLSSSSSSSS HELP MEEEEEEEEEEEEEE
Answers
Answer: The answer to your question is B,C,D.
Answer: i think A, B, D?
Explanation:
If you are leading a team to clean an oil spill in rough waters, which of the following methods would be most effective to clean the oil?
Install booms made from, or with, sorbent materials around the oil spill.
Install hard booms around the oil spill.
Coat the surface of the water with a sorbent material.
Wait until the water calms down and then install booms to contain the spill.
Answers
Answer:Install booms made from, or with, sorbent materials around the oil spill.
Explanation:Dispersants and booms and skimmers are the most frequently used methods to clean up ocean oil spills. All methods have advantages and disadvantages. The effectiveness depends on the situation – the amount and type of oil, the ocean currents and tides and the weather.
Explanation: Dispersants and booms and skimmers are the most frequently used methods to clean up ocean oil spills. All methods have advantages and disadvantages. The effectiveness depends on the situation - the amount and type of oil, the ocean currents and tides and the weather.
PLEASE HELP ILL MARK U BRAINLIEST!
A _________________________________ is a solid, naturally formed substance that always has the same
composition and the same properties
Answers
A solid, naturally formed substance that always has the same composition and same properties
Answer: A rock
I don't know what to put here.
Which human action would most likely increase the nutrients in an ecosystem?
A.building a rock wall
B.fertilizing a cornfield
C.watering a flower bed
D.pulling weeds from a garden
Answers
What is the charge on the Cr in Cr2O72-
Answers
Answer:
+6.
Explanation:
So, a chromium atom here has an oxidation number of +6.
Which is NOT a type of fossils?
Sediment
Cast
Mold
Resin
Answers
Answer: RESIN
Explanation:
a 2 cm cube made of acrylic has a mass of 9.7 g. What is the density of the acrylic?
Answers
Answer:
here
volume of cube = l^3
=2cm^3
=8cm^3
now,
mass=(9.7÷1000)kg
=0.0097kg
volume=8cm^3÷100=0.08
we know that,
density=mass/volume
= (0.0097/0.08)kg/m^3
= 0.12125kg/m^3
Explanation:
the formula to calculate volume of cube is l^3 so here we find the volume of cube using this formula and then we convert gram into kilogram then convert cm into m then by applying the formula of density we find it density
A 2 cm cube made of acrylic has a mass of 9.7 g. The density of the acrylic is 0.12125 kg m3
What is density?Density is the mass of per unit volume.
\(Volume of cube = l^3\\=2cm^3\\=8cm^3\)
mass 9.7 kg, converted into kilograms = 0.0097kg
\(Volume \;= \dfrac{8cm^3}{100} = 0.08\)
Calculating the density
\(Density = \dfrac{mass}{volume} \\\\\dfrac{0.0097}{0.08} = 0.12125\;kg\;m^3\)
Thus, the density of the acrylic is 0.12125 kg m^3.
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