Answers
Related Questions
What is the function of mitochondria in plant and animal cells?
A
It receives and removes wastes.
B
It functions in making RNA and DNA.
C
It is the location of cellular respiration and produces ATP.
D
It provides a barrier between the inside and the outside of the cell.
Answers
11. What is the expression 1 in. = 2.54 cm properly called?
(a) equation
(b) conversion factor
(c) SI factor
(d) equivalence statement
Answers
B. a conversion factor
Explanation:
The expression "1 in. = 2.54 cm" is called a conversion factor.
With this expression inches can be converted to centimeters.
Inversely the expression can also be used to convert centimeters to inches
By rearranging the equation we get
The statement which shows the equal nature of two different expressions is called an equation
Rule of thumb is a general approximation of a result of a test or experiment.
Hurry it’s for a test!! The arctic fox and gray wolf are two examples of
animals that change the color of their fur with the
seasons. In the summer, the animals are a brownish
color, and in the winter, they turn white. The
change of color helps the animals to survive.
Which of the following provides the best explana-
tion for this change?
A The color change helps them raise their young.
B The color change helps protect them from
predators.
The color change helps them be seen from a
great distance.
D The color change helps them regulate their
body temperature better.
Answers
Protect themselves from predators
what is the basic principle of chromatography process
Answers
process by which one separates compounds from one another by passing a mixture through column that retains some compounds longer than others.
What NaCl concentration results when 284 mL of a 0.850 M NaCl solution is mixed with 467 mL of a 0.380 M NaCl solution
Answers
Answer:
0.558 M.
Explanation:
Hello!
In this case, when computing the resulting concentration of the solution after a mixing process, we first need to compute the moles provided by each solution:
[tex]n_{NaCl}^{sol1}=0.284L*0.850mol/L=0.2414mol\\\\n_{NaCl}^{sol2}=0.467L*0.380mol/L=0.1775mol[/tex]
So the total number of moles are:
[tex]n_T=0.2414mol+0.1775mol=0.4189mol[/tex]
And the total volume which is additive:
[tex]V_T=0.284L+0.467L=0.751L[/tex]
Therefore, the resulting molarity of sodium chloride is:
[tex]M=\frac{0.4189mol}{0.751L}\\\\M=0.558M[/tex]
Best regards!
What does point of view refer to?
the purpose of whoever is telling the story
the age of whoever is telling the story
the perspective of whoever is telling the story
Answers
Answer:
I'd say the most reasonable answer is perspective.
Explanation:
"Point of view" is about who is telling and sharing the details in what you are writing or reading. I'm not 100% sure because the word "perspective" doesn't seem like the right word to use, but it's better than the other two in my opinion.
Which process causes earth surface to warm
Answers
ur welcome ;)
Please help me thanks so much....I’ll mark you?!?!:)))) ( 32 points)
Answers
Answer:
I believe it's chemical
Answer:
physical
Explanation:
it's not changing form or substance
Classify the following alcohol as primary secodary or tertiary
CH3CH2CH2OH
Answers
Answer:
The answer would be letter A
Explanation:
The answer is primary
There are three types of alcohol one is primary second is secondary and third is tertiary. Therefore, the given alcoholic compound CH[tex]_3[/tex]CH[tex]_2[/tex]CH[tex]_2[/tex]OH is a primary alcohol.
What is alcohol?Alcohol is a chemical molecule with a functional group called hydroxyl linked to a saturated carbon atom.
Alcohols classified as primary have just one alkyl group on which the carbon atom of the hydroxyl group (OH) is connected. Secondary alcohols are those that have two alkyl groups on either side of the carbon atom of the hydroxyl group. In tertiary alcoholic group, the carbon that is bonded to hydroxyl group is bonded to three alkyl groups. the given alcoholic compound CH3CH2CH2OH is a primary alcohol.
Therefore, the given alcoholic compound CH3CH2CH2OH is a primary alcohol.
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Which reaction will most likely take place?
Pt + FeCl3 Right arrow.
Mn + CaO Right arrow.
Li + ZnCO3 Right arrow.
Cu + 2KNO3 Right arrow.
Answers
Answer:
C Li + ZnCO3 Right arrow.
Explanation:
I just took the test and i got this right.
To see which reaction will happen we need to see the reactivity series of metals which shows the order of reactivity of metals, which displaces which. So option c is the correct option
What is displacement reaction?Displacement reaction is a reaction in which one atom replaces other atom from a molecule on the basis of reactivity strength. It is done by following reactivity series which states the increase order of reactivity of metals.
So in C option Li is a more reactive metal than Zn so Li can displace Zn from the Zinc carbonate Whereas in other option Platinum, Copper, Manganese are less reactive than Iron in Ferric chloride, Potassium in Potassium nitrate and calcium in Calcium oxide according to reactivity series. So In only option c, reaction will go in forward direction.
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For the following reaction, 7.72 grams of nitrogen gas are allowed to react with 4.86 grams of oxygen gas . nitrogen(g) oxygen(g) nitrogen monoxide(g) What is the maximum mass of nitrogen monoxide that can be formed
Answers
Plzzzzzz helppppppppp
Answers
Answer:
a. true
jekskjsskakskkskal2bwh yes
Answer:
True
Explanation:
Phenotype is physical trait, genotype is letter representing, (tt, TT)
A radioactive element has a half- life of 2 days. Which fraction represents the amount of an original sample of this element remaining after 6 days?
Answers
Answer : The fraction represents the amount of an original sample of this element remaining after 6 days is [tex]\frac{1}{8}[/tex] .
Explanation :
Half-life = 2 days
Time = 6 days
Formula used:
[tex]N=N_o\times (\frac{1}{2})^{(\frac{t}{t_{1/2}})}[/tex]
where,
N = final amount
[tex]N_o[/tex] = initial amount
t = time
[tex]t_{1/2}[/tex] = half-life
Now putting all the given values in the above formula, we get:
[tex]N=N_o\times (\frac{1}{2})^{(\frac{6}{2})}[/tex]
[tex]\frac{N}{N_o}=(\frac{1}{2})^{(\frac{6}{2})}[/tex]
[tex]\frac{N}{N_o}=(\frac{1}{2})^3[/tex]
[tex]\frac{N}{N_o}=\frac{1}{8}[/tex]
Therefore, the fraction represents the amount of an original sample of this element remaining after 6 days is [tex]\frac{1}{8}[/tex] .
The mass of a deuterium nucleus 21H is less than its components masses. Calculate the mass defect.________ amu
Answers
Answer:
The mass defect of a deuterium nucleus is 0.001848 amu.
Explanation:
The deuterium is:
[tex]^{A}_{Z}X \rightarrow ^{2}_{1}H [/tex]
The mass defect can be calculated by using the following equation:
[tex]\Delta m = [Zm_{p} + (A - Z)m_{n}] - m_{a}[/tex]
Where:
Z: is the number of protons = 1
A: is the mass number = 2
[tex]m_{p}[/tex]: is the proton's mass = 1.00728 amu
[tex]m_{n}[/tex]: is the neutron's mass = 1.00867 amu
[tex]m_{a}[/tex]: is the mass of deuterium = 2.01410178 amu
Then, the mass defect is:
[tex]\Delta m = [1.00728 amu + (2- 1)1.00867 amu] - 2.01410178 amu = 0.001848 amu[/tex]
Therefore, the mass defect of a deuterium nucleus is 0.001848 amu.
I hope it helps you!
Answer:
0.002389
Explanation:
Use the equation the other person used to answer but with the numbers that are given on this assignment!
For the following reaction, 22.5 grams of iron are allowed to react with 35.0 grams of chlorine gas . iron(s) chlorine(g) iron(III) chloride(s) What is the maximum mass of iron(III) chloride that can be formed
Answers
Answer:
53.31g of FeCl3
Explanation:
The equation of the reaction is given as;
2Fe(s) + 3Cl2(g) --> 2FeCl3(s)
From the stochiometry of the reaction;
2 mol : 3 mol : 2 mol
112g : 213g : 324.4g
Converting the masses given to moles;
Number of moles of Fe = mass / molar mass = 22.5 / 56 = 0.4018
Number of moles of Cl2 = mass / molar mass = 35 / 71 = 0.4930
In this reaction, the limiting reactant is Cl2
213 g of Cl2 produces 324.4g of FeCl3,
35g of Cl2 would produce xg of FeCl3
213 = 324.4
35 = x
x = (35 * 324.4) / 213 = 53.31g
An force results when one force is stronger than other forces
and the motion of an object is affected
Answers
When two equal forces act in opposite directions the result is that the forces are balanced and there is no motion. The process of moving or changing position. When one force is stronger than the other the result is motion.
An force results when one force is stronger than other forces and the motion of an object is affected is unbalanced force.
What is force?A force is an influence in physics that can change the motion of an object. A force can cause a mass object to change its velocity, or accelerate.
The forces are balanced if the people on each side of the rope pull with equal strength but in opposite directions.
As a result, there is no movement. Forces that are in balance can cancel each other out. The object does not move when there is a balanced force.
Forces out of balance, If one force is stronger than the others and their effects do not cancel out, the forces are unbalanced. Unbalanced forces alter motion, speed, and/or direction. A greater force results in a greater change in motion.
Thus, the answer is unbalanced force.
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If a dog has a mass of 16.1 kg, what is its mass in the following units? Use scientific notation in all of your answers.
g
mg
ug
Answers
Answer:
[tex]16.1\times 10^3\ \text{g}[/tex]
[tex]16.1\times 10^{6}\ \text{mg}[/tex]
[tex]16.1\times 10^{9}\ \mu\text{g}[/tex]
Explanation:
Mass of dog = [tex]16.1\ \text{kg}[/tex]
[tex]1\ \text{kg}=10^{3}\ \text{g}[/tex]
[tex]1\ \text{kg}=10^{6}\ \text{mg}[/tex]
[tex]1\ \text{kg}=10^{9}\ \mu\text{g}[/tex]
So,
[tex]16.1\ \text{kg}=16.1\times 10^3\ \text{g}[/tex]
[tex]16.1\ \text{kg}=16.1\times 10^{6}\ \text{mg}[/tex]
[tex]16.1\ \text{kg}=16.1\times 10^{9}\ \mu\text{g}[/tex]
Mass of the dog in the other units is [tex]16.1\times 10^3\ \text{g}[/tex], [tex]16.1\times 10^{6}\ \text{mg}[/tex] and [tex]16.1\times 10^{9}\ \mu\text{g}[/tex].
the molar heat capacity of ice is 37 and the molar heat capacituy of liqyid water is 76. what can be concluded about the relatice magnitudes fo the heat of fusion of ice at 263 k
Answers
Answer:
ΔH 263 < ΔH 273
Explanation:
From the given information
According to Kirchoff law:
[tex]\Delta H_2 = \Delta \ H_1 + \Delta \ (c_p) ( \Delta T)[/tex]
[tex]\Delta H_2 = \Delta \ H_1 + (76-37) \times ( 273 - 263)[/tex]
[tex]\Delta H_2 = \Delta \ H_1 + (39) \times (10)[/tex]
[tex]\Delta H_2 = \Delta \ H_1 + 390[/tex]
Thus, [tex]\Delta H_2[/tex] at 273 is greater than [tex]\Delta \ H_1[/tex] at 263
∴
ΔH 263 < ΔH 273
Do Covalent bonds have weaker or stronger chemical bonds than Ionic bonds?
Answers
Ionic bonds are stronger than covalent bonds since they are of opposite charges. This makes them more attracted to each other, creating bonds that are harder to break. Covalent bonds don't have this and only occur to share electrons between atoms.
I hope this helps!
Which factor is a biotic factor of an ecosystem?
Answers
Answer:
what are your choices
Explanation:
because I can help you
Answer: the bacteria that live in the intestine of a rabbit
Explanation:
thats the answer if ur quiz/test is same as mine
Glycolysis occurs during the second stage of cellular respiration. *
1 point
True
False
Answers
True
Explanation:
The pyruvate molecules from glycolysis next enter the matrix of a mitochondrion. That's where the second stage of cellular respiration takes place. This stage is called the Krebs cycle. During this stage, two more molecules of ATP are produced.
What is a renewable energy source that is captured using the heat of the Earth? I need quick answers so please answer ASAP.
Answers
Explanation:
Geothermal energy
Which of the following are indicators of a chemical change select all that apply
Answers
Answer: 1.color change
2.temperature change
3. precipitate formation
4.gas formation
Explanation: There is no pic
Which two terms represent types of chemical formulas?
1
fission and fusion
2.
oxidation and reduction
3
empirical and structural
4.
endothermic and exothermic
Answers
Answer: 3 empirical and structural
Explanation:
Just guessed on same question got it right
If the trend in a property is periodic, it means it will
a) look terrible if the teacher wears is it
b) only be found in elements next to each other
c) only be found on one row of the periodic table
d) repeat
Answers
Answer:
d) repeat
Explanation:
If the trend in a property is periodic, it means it will repeat on the periodic table.
Periodic properties on the table have a constant pattern as we move up or down a group or across a period from left to right.
This helps to predict some of the salient properties of elements as we move through the periodic table. For example, on most periodic groups, metallicity increases as we move down the group and it decreases across the period.Which statement correctly describes gravity?
an attractive force that acts between all objects through contact
an attractive force that acts between all objects without contact
a repulsive force that acts between all objects through contact
a repulsive force that acts between all objects without contact
Answers
Answer:
I'd pick B, because gravity acts in between all object WITHOUT contact to each other. Gravity is all around us, we make contact with certain materials we use everyday, but objects don't contact to gravity. In certain terms, scientists are still not sure the REAL meaning of gravity, just how it works.
Explanation:
Pick B.
Answer:
I'd think it'd be B, because gravity acts between all objects without making contact.
Explanation:
3. What are the products of the following reaction?
H2SO4 + KOH --> *
A) H2 + K2904
B) H2O + K2SO4
C) HK + HSO4
D) H2O + KS04
Answers
Answer:
H2SO4 + 2KOH -------> K2SO4 + 2H2O
Explanation:
Please help me thanks so much....I’ll mark you?!?!:))))
Answers
Answer:
Extreme heat
Explanation:
Because when matter is heated up The molecules move faster.
Answer:
I think it's extreme heat
Is the enzyme lactase a catalyst? why or why not?
Answers
Answer:
Explanation:
The enzyme lactase acts as a catalyst to facilitate the reaction and make it happen very quickly. This enzyme is made u.
do the rest
hope it helps
Enzyme lactase catalyzes the hydrolysis of the glycosidic bond of lactose to form galactose and glucose.
What is lactase?Lactase can be described as an enzyme produced by many organisms. Lactase is located in the small intestine of humans and other mammals. It is essential to accomplish the digestion of milk and it breaks down lactose that gives milk its sweetness.
A person with a deficiency of lactase, and who consume dairy products, may experience the symptoms of lactose intolerance. Lactase is a part of the β-galactosidase family of enzymes and is a glycoside hydrolase involved in the hydrolysis of lactose into constituent galactose and glucose monomers.
The β-glycosidic bond in D-lactose in metabolism is hydrolyzed to form D-galactose and D-glucose, which can be absorbed into the bloodstream. The optimum temperature of the human lactase is about 37 degrees Celcius and the optimum pH of the human lactase is equal to 6.
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i need help ......................................
Answers
Have different temperatures
Solids don’t take the shape of the container it’s in while liquid and gas do
Answer
One of them is a Solid and one of them is a liquid and the other one is air
Explanation:
