Answer:
if you need to know what time to wake up or to get ready for work/ school then u need a certain time so ur not late for it
4. What is the mass of N2H4 gas in a 350.0 mL container at 50.0 °C, if the pressure of the gas is
885.0 torr?
Answer:
0.36g
Explanation:
Given parameters:
Volume of N₂H₄ = 350mL = 0.35dm³
Temperature of container = 50°C = 50 + 273 = 323K
Pressure = 885torr;
760torr = 1atm
885torr = [tex]\frac{760}{885}[/tex] = 0.86atm
Unknown:
Mass of the compound = ?
Solution:
The mass of the compound can be derived using the expression below;
Mass = number of moles x molar mass
molar mass of N₂H₄ = 2(14) + 4(1) = 32g/mol
To find the number of moles;
PV = nRT
n = [tex]\frac{PV}{RT}[/tex]
P is the pressure
V is the volume
R is the gas constant = 0.082atmdm³mol⁻¹K⁻¹
T is the temperature
n = [tex]\frac{0.86 x 0.35}{0.082 x 323}[/tex] = 0.01mole
So,
Mass = 0.01 x 32 = 0.36g
A scientist places four identical cells into four different liquids, each with different concentrations of magnesium. Cell Description of Liquid Result W Slightly more magnesium than the cell Took in magnesium X The least amount of magnesium Took in magnesium Y Slightly less magnesium than the cell Took in magnesium Z The most amount of magnesium Took in magnesium Which shows evidence of active transport?
Answer:
The correct option is Z
Explanation:
Active transport can be described as the movement of molecules against a cell's concentration gradient; meaning the movement of molecules across the cell's membrane from a region of lower concentration to a region of higher concentration. From this, it can be deduced that to have active transport in the description in the question, the "body" (the cell or the liquid) with the most amount of magnesium took in more magnesium (showing movement against concentration gradient as the magnesium moved from the least side to the most side). Thus, the correct option is Z
Answer:
The answer is D) cells X and Y
Explanation:
Sexual reproduction involves (one / two) parent/s to produce a new
individual of the same species.
Asexual reproduction (does / does not) cause variation. All the daughter
cells have the same / different) resistance to diseases.
Answer:
True-Did you need help?
Explanation:
Answer:
Sexual reproduction involves two parent/s to produce a new individual of the same species.
Asexual reproduction does not cause variation
All the daughter cells have the same resistance to diseases.
Explanation:
is this correct?????/????///??
Answer:
No.
Explanation:
You have mistaken C6H12O6 as Carbon Dioxide. However, this is glucose, so this is sugar. We do not inhale sugar, we obtain it from the food we eat or in the case of autotrophs, from producing it. Thus, the correct answer is C. from the food we eat.
Which of the following is not an example of sn adaptation
A. arctic rabbit's white fur
B.Person's Blue eyes
C.giraffe's long neck
D.Bears hibernating
Answer:
B. Person's blue eyes
Explanation:
In order for organisms to thrive in the environment, they have to undergo some changes. This process is called "adaptation."
A. The arctic rabbit's white fur is its adaptation to the cold environment in the Arctic area. Thus, this is adaptation.
B. A person's blue eyes doesn't have to do with adaptation; rather, it is connected to "genetics." Such genetic information is being carried by an individual from his/her parents. This makes it the only choice that is not an example of an adaptation.
C. The giraffe's long neck is its adaptation to eating from the treetops since it is a herbivore. This also prevents it from competing with other animals for food.
D. Bears hibernating is a proof of their adaptation to the winter season. Since food is scarce on these months, the bears try to sleep in order to stay alive. This also allows them to stay warm as well.
What biological organisms are in topsoil?
A.) fossil remains from millions of years ago
B.) hard soil, clay, and large rocks
C.) decaying and living plant and animal life
D.) nutrients from basic building materials
Answer:
B I think
Explanation:
Answer:
Decaying animal and plant life is in the topsoil
What are the 7 levels of scientific classification/taxonomy in order from highest
to lowest?
When studying animal behavior, the distribution of organisms within a choice chamber can be studied to identify animal preferences. 20 Isopods are placed in a 2-choice choice chamber. A cotton ball dampened with distilled water is placed in Chamber A; A dry cotton ball is placed in Chamber B. After 15 minutes 2 Isopods are located in Chamber B, and 18 isopods are found in Chamber A. Perform the chi-squared test to determine if the distribution of isopods is significant or due to random chance.a. chi-squared is 1.20, no it is not significant.
b. chi-squared is 8.42, no its not significant.c. chi-squared = 12.8, yes it is significant.d. chi-squared is 18.59, yes it is significant.
Answer:
The correct option is c. chi-squared = 12.8, yes it is significant.
Explanation:
Available data:
20 Isopods are placed in a 2-choice choice chamber. Different conditions were applied15 minutes later: 18 isopods are found in Chamber A and 2 Isopods are located in Chamber B.H₀= Individuals will be equally distributed
H₁ = Individuals will not be equally distributed.
Chi square= ∑ ((O-E)²/E)∑ is the sum of the terms
O are the Observed individuals: 2 in chamber B, and 18 in chamber A.
E are the Expected individuals: 10 in each chamber
X² = ∑ ((O-E)²/E) = ((2 - 10)²/10) + ((18 - 10)²/10) = 6.4 + 6.4 = 12.8
X² = 12.8
Freedom degrees = K – 1 = 2 - 1 = 1(K = Independent variables = dry cotton and wet cotton)
Significance level, 5% = 0.05 Table value/Critical value = 3.8412.8 > 3.84 meaning that the difference between the observed individuals and the expected individuals in each chamber is statistically significant. Not probably to occur by random chances.
There is enough evidence to reject the null hypothesis. The distribution of isopods is statistically significant.Which air pollutant is most likely to cause bronchitis? carbon monoxide ozone emis
Answer:
ozone
Explanation: i took the test
how to solve problems of Transportation by using science
The MOST complex level of organization within large organisms, such as elephants, is the organ system. True or false
Answer:
False
Explanation:
Answer:
true
Explanation:
It has the most of complex level of organization within large organisms, such as elephants, is the organ system.
What is it called when scientific experts agree a particular theory or idea is correct based on the evidence available?
A. Scientific research
B. Collective agreement
C. A fact
D. Scientific consensus
Scientific experts are the pannel of the researchers involved in studies and analysis. The expert agreeing on a theory based on the evidence is called scientific consensus. Thus, option D is correct.
What is scientific consensus?
The scientific consensus is the agreement where the scientists and researchers from various fields agree on a proposed idea. They are evaluated by the majority agreeing with a particular theory.
The publications, academic discussion, and peer review accomplishes the consensus and act as a quality checker that evaluates the data and the facts based on the evidence presented.
Therefore, in scientific consensus, scientific experts agree on a particular theory.
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What genetic condition results in the trait indicated by the blue color being
expressed in the individuals shown here?
Answer:
ressessive
Explanation:
because it is what present by its phenotype
Blue color being expressed in the individuals shown here is recessive trait.
What is recessive trait?In terms of genetics, the term "recessive" describes the connection between an observed trait and the two inherited forms of a gene associated with that feature.
Each gene has two alleles that an individual inherits from each parent. When a characteristic is recessive, both of the (recessive) alleles of the gene that causes the trait must be present for the trait to manifest. When there is only one copy of an allele, it has no effect at all.
This is in contrast to a dominant trait, which can only be expressed when one of the two alleles is present.
Therefore, Blue color being expressed in the individuals shown here is recessive trait.
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deforestation causes an increase in CO2 because when trees are cut down, nothing absorbs the carbon
true or false
Answer:
♡hi luv ♡
-- it's true
~Clara ✧･ﾟ: *
Explanation:
how do cells in animals (o.r. birds horses humans etc.) get energy.
Answer:
From the mitochondria
Explanation:
Marc plans to create a model of the solar system for his school’s science fair. He knows the solar system includes many celestial bodies.
Which statement identifies a possible limitation of this model?
A. The model will be supported with scientific evidence.
B. The model will include all planets of the solar system.
C. The model will be used to predict planet distances and sizes.
D. The model will oversimplify what the solar system looks like.
Answer:
B. The model will include all planets of the solar system.
Explanation:
Answer:
not fs but i heard D
Explanation:
nobodys saying A at all
b and c seem off could be wrong. just lmk
45 POINTS AND BRAINLIEST!
What is the most significant difference in current weather forecasting methods compared to what was done in the past?
A. more accurate computer-based weather models
B. improved weather instruments
C. better TV and radio weather communications
D. more weather stations reporting data
Your answer would be C
Answer:
A.
Explanation:
That allowed meteorologists to plot weather maps and see weather systems moving from place to place. That improved the accuracy of forecasts. During the 1900s, meteorologists developed even better tools for observing and predicting the weather. :)))) hope that helped!!!
The glucose molecule created during this process contains oxygen. Which reactant does the oxygen come from?
Water
Sunlight
Carbon dioxide
Oxygen gas
I REALLy NEED HELP!!!
Which statement about the waves shown is true?
The statement about the wave that is true is wave 3 has lowest frequency. The correct option is C.
What is frequency?The frequency of a repeating event is the number of occurrences per unit of time. It is distinct from angular frequency and is sometimes referred to as temporal frequency. The unit of frequency is hertz, which equals one event per second.
In science and engineering, frequency is an important parameter used to specify the rate of oscillatory and vibration phenomena such as mechanical vibrations, audio signals (sound), radio waves, and light.
The relationship between frequency and wavelength is inverse. The wavelength of the wave with the greatest frequency is the shortest.
One-half the wavelength equals twice the frequency. As a result, the wavelength ratio is inverse to the frequency ratio.
Thus, the correct option is C.
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80 POINTS! Refer to the Newsela article "PRO/CON: Should We Abolish the Electoral College?"
Part A
Read the text under the heading "PRO: Let's Give All Voters an Equal Voice."
Which claim does the author make as a pro for doing away with the Electoral College.
The popular vote determines the winner in a presidential election.
The Senate and the House of Representatives have an equal voice in shaping government.
The way the federal government is set up ensures that the minority has a voice.
It is important to ensure that small states have an equal voice.
Question 2
Part B
Read this excerpt from the article.
The U.S. Senate gives states equal representation with two senators each. The House of Representatives, however, allocates representation based on population.
Does this excerpt provide evidence that effectively supports the claim identified in Part A?
Yes, because it provides an example of the way in which the federal government gives smaller states a voice.
No, because it does not provide an explanation for how the federal government is set up.
Yes, because it gives evidence that the Constitution provides a voice for minorities.
No, because it describes the legislature alone and not other parts of government.
Answer:
A
Explanation:
i think its A........
What are your transcripts? What is a prescription? What is a script for a play? What do all of these words have in common?
Describe Pollan’s son’s first experience of sugar.
Answer:
because it's like sweet sugar that we uses and eats so that we put lot's of sugar in our bodies to give us more energy.
Explanation:
why do you think the source of information related to job are important for the concerned people
Answer:
It’s important to avoid extra costs, time and wrong knowledge/ idea.
Explanation:
I think the source of information related to job are important for the concerned people in order to enable them have the best view and position on jobs available. This helps them to weigh their options very well before taking decisive actions.
It also helps to avoid extra costs, time and wrong knowledge/ idea which in turn promotes general efficiency of such group of people.
19.
is an example of endogenic process.
Answer:
B
Explanation:
Why do you think P-waves and S-waves are also called body waves? Explain..
How does the body maintain homeostasis for a blood clot
Answer:When a wound causes bleeding, the body responds with a positive feedback loop to clot the blood and stop blood loss. Substances released by the injured blood vessel wall begin the process of blood clotting
Explanation:
Answer:
When a wound causes bleeding, the body responds with a positive feedback loop to clot the blood and stop blood loss. Substances released by the injured blood vessel wall begin the process of blood clotting.
Explanation:
-LibreTexts
Photosynthesis stores energy.
Please select the best answer from the choices provided
True
False
Answer:
True
Explanation:
it not only stores energy but it feeds the plant
I think that would be true.
What type of inheritance is shown by the genes that control sickle cell anemia? Explain your response.
Answer:
The genes have a codominant pattern of inheritance because the heterozygous forms show both traits equally.
Explanation:
(That was the sample answer.)
Answer:
The genes have a codominant pattern of inheritance because the heterozygous forms show both traits equally.
Explanation:
edmentum sample answer
Kayla is writing a study guide about analyzing word choices in literature. Which of the following should she include in her
study guide as a definition for "allusion"?
A
An allusion is an exaggeration.
B
An allusion is a misleading image or idea.
An allusion is a reference to an outside text or event.
D
An allusion is a comparison between two things that share a commonality
PLEASE HELP
Answer:
the answer is c just did it on edg and got it right
Explanation:
Answer:
the answer will be c
Explanation:
Which correctly lists three places that fresh water is found?
Answer:
Ice caps and glaciers - 69%
Groundwater - 30%
Surface water - less than 1 %
Explanation:
Fresh water is a type of water, found in nature, in which there is no salt. It is water suitable for consumption (provided it is treated) for humans and animals. Fresh water is also used in agriculture. Only about 2.5% of the water found on our planet is sweet. It is mainly found in polar caps and glaciers, groundwater, surface water.
With the growth of the world population, fresh water has become increasingly scarce. Overuse, waste and water pollution are the main problems related to fresh water today.
As it is a precious and scarce mineral resource, society must be aware that, in order not to run out of water in the near future, it is necessary to avoid waste, use it rationally and do not pollute rivers, lakes and water sources.
Answer:
C).ice sheets, water vapor, rivers
:)
Explanation: