Answer:
0.583M
Explanation:
M = CV
C is concentration in grams.
V is the volume.
Remember to convert mL to Litres.
A student puts his signature with graphite pencil.
If the mass of carbon in the signature is 10-12g, calculate
the number of carbon atoms in the signature.
Answer:
If the mass of carbon in the signature is 10-12g, calculate. the number of carbon atoms in the signature. the answer is 5.01 x 10^10 atom.
Explanation:
wlcm
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a force of attraction between objects that is due to their masses and distance between objects
a. gravity
b. weight
c. mass
Answer:
the answer is gravity
hope this helps
If an organism ingests 950.0 g of glucose (C6H12O6) in its lifetime, how many grams of carbon dioxide (CO2) will be released? (molar mass C6H12O6 = 180.156 g/mol) (molar mass CO2 = 44.009 g/mol)
Answer:
1392. g CO2
Explanation:
How many grams are in a sample of NH₃ that contains 0.5 mol
Answer:
8.51526 I did it on an online calculator!
Explanation:
Answer:
8.51526 grams
Explanation:
0.5 moles NH3 converted is 8.51526
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
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!
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)
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 mPure substances are homogeneous substances made of identical particles called
Answer:
a pure substance
Explanation:
i hope i help if i didnt im srry:(
molecules can be dissolved? Why?
Answer:
Dissolving is when the solute breaks up from a larger crystal of molecules into much smaller groups or individual molecules. This break up is caused by coming into contact with the solvent. In the case of salt water, the water molecules break off salt molecules from the larger crystal lattice.
Explanation:
Answer:
Gases can dissolve in water. The dissolving of a gas in water depends on the interaction between the molecules of the gas and the water molecules. The amount of gas that can be dissolved in water depends on the temperature of the water. More gas can dissolve in cold water than in hot water.
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?
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
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Thallium-207 has a half-life of 4.77 minutes. If an initial sample weighed 155 grams, and
now only weighs 2.42 grams, how many half-lives have occurred?
A.4
B.6
C.5
D.3
Answer:
6
Explanation:
You divide the initial sample weight (155) by 2 until you get to 2.42.
How much concentrated 15.54 M sulfuric acid is need to prepare 6.1 mL of a 2.28 M solution?
Answer:
0.895 mL
Explanation:
Using the formula;
C1V1 = C2V2
Where;
C1 = initial concentration (M)
C2 = final concentration (M)
V1 = initial volume (mL)
V2 = final volume (mL)
According to the information provided in this question;
C1 = 15.54M
V1 = ?
C2 = 2.28M
V2 = 6.1 mL
Using C1V1 = C2V2
V1 = C2V2 ÷ C1
V1 = (2.28 × 6.1) ÷ 15.54
V1 = 13.908 ÷ 15.54
V1 = 0.895 mL
In which compass direction will the storm center (Low) most likely move over the next few days if it follows a typical storm track?
Answer:
The center of a storm system (Low) over part of the United States and the frontal boundaries associated with this system are shown. Point A represents a location on the map.
Explanation:
...
Are atoms of gold the same as antoms of oxygen? yes or no?
Answer:
No they are not the same the are both di
1. Surface area, agitation, and ____ affect the dissolving rate of a solid. 1. termperature 2. location
Answer:??
Explanation:
what is the molarity of a solution containing 9.0 moles of solute in 2500 ml of a solution
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
Answer:
2Mg + 4HCl (aq) --> 2 MgCl2 (aq) + H2
Explanation:
balanced...
Substances formed as a result of a chemical reaction are calledImmersive Reader (1 Point) products reactants catalysts precipitates
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.
Males have glands called testes that release the hormone known as _______________. a estrogen b epinephrine c testosterone d toblerone
Answer:
testosterone is released from their testes!
PLEASE HELPPPP IM GIVING THE TEST RN
What type of reaction is shown in the equation below? 2H20 - 2H2 + O2
A synthesis
B. decomposition
c. single replacement Will
D. double replacement li
Answer:
answer is c
Explanation:
single replacement
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)?
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.
Look at the reaction below.
Upper H subscript 2 upper S upper O subscript 4 (a q) plus upper Upper M g (s) right arrow Uper M g upper S upper O subscript 4 (a q) plus upper H subscript 2 (g).
Which substance is the acid in the reaction?
Mg(s)
H2(g)
MgSO4(aq)
H2SO4(aq)
Answer:
D
Explanation:
It is Sulfuric Acid
H₂SO₄ (aq) Sulphuric Acid is the acid in the reaction.
What is an Acid ?A substance that can donate a proton or accept an electron pair to form a bond is called an Acid
An acid turns Litmus paper red and has pH < 7 , It has the property of neutralizing alkali.
It has sour taste and can dissolve metals.
The reaction mentioned in the question is :
H₂SO₄ (aq) + Mg (s) ⇒ MgS0₄ (aq) + H₂ (g)
Here Sulphuric Acid is donating a proton i.e. H⁺ so is the acid in the reaction.
To know more about Acid
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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
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
Answer:
B) On genes within chromosomes
Explanation:
Answer:
B) On genes within chromosomes
PLEASE HELP!!!!!!!!!!
what is the mole fraction of MgCl2 in a solution created by dissolving 132.1 g of MgCl2 into 9.72 mol of water?
1 - 0.125
2- 12.5
3- 2.50
4- 0.225
Please help thank you
Answer:
The answer is the 2nd one down: The green house affect
Complete the statement to describe the movement of water on Earth.
The movement of water on Earth's surface and in the atmosphere is drive by energy from ___and the pull of_____
word blank
force, gravity, sun , energy, the earth, the sun
Answer: The movement of water on Earth's surface and in the atmosphere is driven by energy from the sun and the pull of gravity.
Help please!!!!!!!!!! Both questions!!!!
help me get this right no links
I think you forgot to upload the image. Create a new question including the image so that we can see the question.
help me get this right no links
Answer:
What's the question? or show a picture
What is the name
H3C
CH
CH3
CH3
Answer:
that is correct answer is correct answer