Answers
Answer:
its the top one
Explanation:
Related Questions
PLEASE HELP!!!!!
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In which organ would you expect food to be more ground up in? The crop or the gizzard? Why?
Which internal reproductive structure is the "male" structure (makes and sends out sperm)?
for science
Answers
Answer:
In which organ would you expect the contents of food to be more ground up? (Gizzard)
These external structures are the penis, scrotum, epididymis, and testes. The internal organs of the male reproductive system are called accessory organs. ... To discharge sperm within the female reproductive tract.
A baby chicken has feathers on its feet that are similar to that of its parents. Where are the instructions stored that provide information for a baby chicken’s feathery feet? A) In cytoplasm inside cells B) On genes within chromosomes C) On the cell membrane Eliminate D) In the mitochondria
Answers
Answer:
B) On genes within chromosomes
Explanation:
Answer:
B) On genes within chromosomes
How does the [H+] concentration change in a sample as the pH scale decreases 2 units? (make sure to say whether it goes up or down and by how much)
Answers
A 32.9-mL sample of Ba(OH)2 is titrated with HCl. If 37.2 mL of 0.863 M HCl is needed to reach the endpoint, what is the concentration (M) of the Ba(OH)2 solution
Answers
Answer:
[tex]M_{base}=0.488M[/tex]
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to solve this problem by firstly writing the chemical reaction between hydrochloric acid and barium hydroxide:
[tex]2HCl+Ba(OH)_2\rightarrow BaCl_2+2H2_O[/tex]
It means there is 2:1 mole ratio of the acid to base, and we are able to write the following mole ratio, then written in terms of volumes and concentrations:
[tex]n_{acid}=2n_{base}[/tex]
Thus, we obtain the following:
[tex]M_{acid}V_{acid}=2M_{base}V_{base}[/tex]
Then, we solve for the concentration of the base and consequently plug in the given data to obtain:
[tex]M_{base}=\frac{M_{acid}V_{acid}}{2V_{base}} \\\\M_{base}=\frac{0.863M*37.2mL}{2*32.9mL}\\\\M_{base}=0.488M[/tex]
Regards!
1. Calculate the mass of 1.000 mole of CaCl2
Show all your work. Answer in scientific notation when applicable.
Answers
Answer: 110 g/mol
Explanation:
First we need to find the molar mass of CaCl2 using the periodic table:
Ca: 40
Cl: 35 (Since Cl has a 2 at the end, multiply 35 by 2)
70+40= 110
Then multiply by amount of moles
110g×1.000mol = 110 g/mol
PHYSICAL CHANGE OR CHEMICAL CHANGE
1.When making a sauce, a chef boils the alcohol until it changes to a gas and leaves the pan.
2. A scientist adds high pressure to gaseous oxygen until it turns into a gas.
3. Hydrogen sets fire and burns when exposed to oxygen and a spark.
4. A person accidentally drops a mirror so that it shatters.
5. A child falls from a tree and breaks a bone.
6. As soon as you begin eating, your body starts to digest food. The process of digestion is a
7. After dipping a piece of a chicken into batter, a person puts it into a deep fryer. The process of frying chicken is a
8. When a person slices tomatoes before adding them to a salad, what type of change did the tomatoes experience
9. Sugar is dissolved completely into water.
10. A branch rots and decomposes after falling from a tree
Answers
Answer:
1.Chemical Change
2.Chemical Change
3.Chemical Change
4.Physical Change
5.Physical Change
6.Chemical Change
7.Chemical Change
8.Physical Change
9 Physical Change
10.Physical Change
Explanation:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula.
Why do you think earthquakes and volcanoes occur in patterns?
Answers
Answer: ANSWER BELOW
Explanation:
Because that is the way it works.
How many grams equal 4.3 x 1024 atoms of oxygen (O2)?
Answers
Answer:
https://socratic.org/questions/how-many-grams-are-in-1-25-x-10-22-atoms-of-oxygen#403337
Explanation:
A certain sample of gas wieghing 22.8g contains 6.22g of carbon and an unweighed quantity of oxygen. What is the percentage composition of this gas
Answers
Answer:
16.58
Explanation:
22.80
-
6.22
_____
16.58
law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed. Therefore, the quantity of mass is conserved over time.
I hope that helps
A supersaturated solution is said to contain
Answers
Explanation:
A solution that contains more than the maximum amount of solute that is capable of being dissolved at a given temperature.
I hope it helps
Answer:
A supersaturated solution is said to contain more solute than it can dissolve at that given temperature.
what is the molarity of a solution containing 9.0 moles of solute in 2500 ml of a solution
Answers
A bowling ball is let go from a height of 30 cm. What is the velocity of the
ball just before it hits the ground?
Select one:
о
0.30 m/s.
О
17 m/s.
O
24 m/s
a
1.3 m/s
Answers
Answer:
The answer is 0.30 m/s
Explanation:
i search it on
What can the reader conclude about the effects of hurricanes?
They only cause damage near the equator.
They cause most of their damage when they reach land.
The damage is only bad if you are inside the eye of the storm.
People are safe from hurricanes if they stay inside of their homes.
Answers
The cells of a tomato contain mostly an aqueous solution of sugar and other substances. If a typical tomato freezes at -2.5 °C, what is the molality of the sugar in solution? (Hint: sugar is a covalent compound, it does not dissociate in water)
Answers
Answer:
1.35 m
Explanation:
We can solve this problem by using the freezing point depression formula:
ΔT = Kf * m * iWhere:
ΔT is the temperature difference between the freezing point of the pure solvent (water) and the solution. In this case it is (0 °C - -2.5 °C = 2.5 °C).Kf is the cryoscopic constant, for water it is 1.853 °C*kg/mol.m is the molality.i is the van't Hoff factor, as sugar does not dissociate in water, it has a value of 1.We input the data:
2.5 °C = 1.853 °C*kg/mol * m * 1And solve for m:
m = 1.35 mSubstances formed as a result of a chemical reaction are calledImmersive Reader (1 Point) products reactants catalysts precipitates
Answers
Answer: substances formed as a result of chemical reaction are called PRODUCTS.
Explanation:
A chemical reaction can be defined as a reaction in which substances known as the REACTANTS makes or breaks it's bonds to form another substance usually referred to as the PRODUCT. Usually, a new substance which is referred to as the product that is formed is different from the original reacting substances. Some of the characteristics of a chemical reaction include:
--> colour change,
--> heat production,
--> precipitation
The rate at which these chemical reaction occurs depends on some factors such as pressure, temperature and concentration of the reactants
There are different examples of chemical reaction which includes:
--> Rusting of iron: this occurs when iron and oxygen combines to form a mixture of iron oxides, which is the product of the chemical reaction.
--> The burning of magnesium in air: in this Chemical reaction, magnesium reacts with oxygen to form magnesium oxide which is the product of the chemical reaction.
2Mg(s) + O2(g) △→ 2MgO(s)
--> Production of table salt: this is formed from the reaction of sodium and chloride to give sodium chloride as the product of the chemical reaction.
Therefore in a chemical reaction, no atom is destroyed or created but a new PRODUCT is formed from reactants.
If 24 grams of sodium chloride reacts with an excess amount of magnesium how many grams of sodium oxide will be produced
Answers
Pure substances are homogeneous substances made of identical particles called
Answers
Answer:
a pure substance
Explanation:
i hope i help if i didnt im srry:(
How many moles are in 8.0 gram sample of C3H4
Answers
Answer:
0.18 mol C₃H₈
Explanation:
to find the mole you have to convert the 8.0grams into moles.
8.0g C₃H₈ 1 mol C₃H₈
1 44.0g C₃H₈
*Pretend that those are a table*
I got 44.0g because Carbon is 12.0g you multiply that 3 times because it has a subscript of 3 and do the same for Hydrogen (1.0 x 8) then add those which would be 44.0g.
1 mol of C₃H₈ = 44.0g C₃H₈
now just mulitply and divide them.
8.0g x 1 = 8.0
1 x 44.0g = 44.0
8.0/44.0 = 0.18 mol C₃H₈
Se disuelven 10 g de acido carbónico H2CO3 en 150 g de agua. Determina la concentración % m/m de esa disolución?
Answers
The question is: 10 g of carbonic acid H2CO3 are dissolved in 150 g of water. Determine the% m / m concentration of that solution?
Answer: The% m / m concentration of that solution is 6.66%.
Explanation:
Given: Mass of solute = 10 g
Mass of solvent = 150 g
Formula used to calculate the %m/m is as follows.
[tex]Percent (m/m) = \frac{mass of solute}{mass of solvent} \times 100[/tex]
Substitute the values into above formula as follows.
[tex]Percent (m/m) = \frac{mass of solute}{mass of solvent} \times 100\\= \frac{10 g}{150 g} \times 100\\= 6.66%[/tex]
Thus, we can conclude that the% m / m concentration of that solution is 6.66%.
How many grams are in a sample of NH₃ that contains 0.5 mol
Answers
Answer:
8.51526 I did it on an online calculator!
Explanation:
Answer:
8.51526 grams
Explanation:
0.5 moles NH3 converted is 8.51526
does anyone know if these are correct? if not can anyone tell me what the answers are?
Answers
Answer:
16. correct
17. correct
18. correct
19. correct
What is the Hso for NaCl → Na+ + C1-? The lattice energy is –788 kJ/mol, the enthalpy of hydration for Na+ is -410
kJ/mol, and the enthalpy of hydration for cr- is -313 kJ/mol. Use AH sor=-Har + Hhydr.
A. -1,511 kJ/mol
B. -855 kJ/mol
C. 65 kJ/mol
D. 1,511 kJ/mol
Answers
Answer:
c
Explanation:
Mg + 2HCI - MgCl2 + H2
If 500g of magnesium chloride (MgCl2) is produced in the above reaction, how
many grams of hydrogen (H2) would be produced?
Answers
Explanation:
from the equation we know that 500g of Mgcl are produced.
but we also know that 83g of Mgcl will give 2g of hydrogen
therefore, 500g of Mgcl will give x g of hydrogen
x=
500*2/83g = 12.04g
if you have not yet understood just leave a message
1. Surface area, agitation, and ____ affect the dissolving rate of a solid. 1. termperature 2. location
Answers
Answer:??
Explanation:
he diagram shows a device that uses radio waves.
Two radio towers. The towers are equal distance apart with an arrow between them. The left tower is labeled X. The right tower is labeled Y. The arrow is pointing from Tower X to Tower Y.
What is the role of the part in the diagram labeled Y?
modulate, amplify, and send out waves
capture, amplify, and demodulate waves
change the amplitude and frequency of waves
change the pulse and phase of waves
Answers
Answer:
b
Explanation:
Help please!!!!!!!!!! Both questions!!!!
Answers
on the second on its false.
A 72.4 mL solution of Cu(OH) is neutralized by 47.8 mL of a 0.56 M H2(C204) solution. What is the concentration of the Cu(OH)?
Answers
Answer: The concentration of [tex]Cu(OH)_{2}[/tex] is 0.369 M.
Explanation:
Given: [tex]V_{1}[/tex] = 72.4 mL, [tex]M_{1}[/tex] = ?
[tex]V_{2}[/tex] = 47.8 mL, [tex]M_{2}[/tex] = 0.56 M
Formula used to calculate the concentration of [tex]Cu(OH)_{2}[/tex] is as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]
Substitute the values into above formula as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}\\M_{1} \times 72.4 mL = 0.56 M \times 47.8 mL\\M_{1} = \frac{0.56 M \times 47.8 mL}{72.4 mL}\\= 0.369 M[/tex]
Thus, we can conclude that the concentration of [tex]Cu(OH)_{2}[/tex] is 0.369 M.
One way to slow down global climate change is to
А
use less nonrenewable resources.
B
use more nonrenewable resources.
с
drive cars that only burn fossil fuels.
D
use less dangerous ways to find oil.
Answers
Because it will slow down global climate change
One way to slow down the global climate change is to reduce the use of nonrenewable sources such as fossil fuels because, they release harmful gases that leads to global warming.
What is global warming?The increase in the overall atmospheric temperature is called global warming. Global warming is mainly caused by green house gases such as carbon dioxide, methane, oxides of nitrogen etc.
Green house gases intensely absorbs heat energy that radiates out from earth. Thus they trap the temperature in the atmosphere make the planet warmer.
Nonrenewable energy sources such as nuclear reactions, fossil fuels, coal etc. coal and petroleum are highly rich in toxic gases and burning them releases these gases including carbon dioxide and methane to the atmosphere increase the rate of global warming.
Therefore, reducing the use of nonrenewable resources is a good way to slow down the global climate change.
Find more on global warming:
https://brainly.com/question/29625243
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Mg (s) + 2 HCl (aq) --> MgCl2 (aq) + H2 (g)
Use the balanced chemical equation above to determine the number of moles of hydrogen gas that would be produced if 3.50 moles of solid magnesium reacted. please show all work and record your answer with proper units and significant figures.
Pls help
Answers
Answer:
2Mg + 4HCl (aq) --> 2 MgCl2 (aq) + H2
Explanation:
balanced...
Males have glands called testes that release the hormone known as _______________. a estrogen b epinephrine c testosterone d toblerone
Answers
Answer:
testosterone is released from their testes!