Answer:
30mL is required
30ml of a 2.50 M hydrochloric acid solution is required to make 100.0 mL of a 0.750 M solution.
What is HCl?HCl is an acid which is made up of hydrogen and chlorine gas.
By the formula of dilution
M1V1 = M2V2
where V1 = 2.50 m
M2 = 100.0
V2 = 0.750 m
M1 × 2.50 m = 100.0 × 0.750 m
M1 = 30 ml
Thus, the M1 is 30 ml option a is correct.
Learn more about HCl
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8. I have a mixture of iron, salt, and
water. I heat it up to a boil.
Explain what happens to each part
of my mixture.
After boiling the mixture of iron salt, water
iron, and salt it will remain and water will be evaporated
A blue fish and a yellow fish mate and have green offspring. What type of inheritance is this an example of?
The type of inheritance displayed by the illustration is incomplete dominance.
Incomplete dominanceIt is a kind of inheritance in which one of the two alleles of a gene exerts incomplete influence on the other allele.
For example, a cross of white and red flower plants yielding a plant with pink flowers. It means that the dominance of the red or pink allele is incomplete.
The same is applicable to a blue fish mating with a yellow fish to produce green offspring. A blend of the two colors occurred.
More on incomplete dominance can be found here: https://brainly.com/question/14053639
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explain the occurrence of oxygen
Answer:
Oxygen is one of the most abundant elements on Earth. Oxygen accounts for 20.9% of the atmosphere, 45% of the Earth's crust (as oxide minerals) and also accounts for almost all of the mass of water on Earth (89%). It is found in a huge number of natural minerals including sulfates, phosphates, carbonates and oxides.
Explanation:
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What type of bonds are located between the nucleotides found in the same DNA strand ?
Group of answer choices
phosphodiester
hydrogen
hydrophobic
van der waals
ionic
Answer:
hydrogen bond exists between nucleotides
Answer:
phosphodiester
Explanation:
Noncovalent hydrogen bonds connect the nucleotides that make up each DNA strand. Individual hydrogen bonds are weaker than covalent bonds like phosphodiester bonds. But they are so numerous that they strongly connect the two DNA polymers.
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Please help me
Calculate the percentage of nitrogen in the two important nitrogen fertilizers,ammonia, NH3 and Urea, CO(NH2)2
Answer:
Percent composition = mass of element in the compound/mass of compound × 100
In this case, the mass of the compound is its molar mass.
Percent Composition of N in CO(NH2)2 (urea)
Molar mass CO(NH2)2 = 60.056 g/mol
Mass of N = 2×14.007 g/mol = 28.014 g/mol
%N: 28.014 g/mol/60.056 g/mol × 100 = 46.646%
Percent Composition of N in NH4NO3 (ammonium nitrate)
Molar mass of NH4NO3 = 80.044g/mol
Mass of N = 2×14.007 = 28.014 g/mol
%N: 28.014 g/mol/80.044 g/mol × 100 = 34.998%
Hope this helps, please let me know If I'm wrong.
If an isotope decays by the process of beta emission,
a. the number of neutrons remains the same
b. the atomic number changes
c. the mass number changes
d. protons are given off
What do all types of waves transfer from place to place? A. air B. energy C. matter D. water
Answer:
Water is the answer
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Burning hydrogen is an example of a chemical reaction. The reaction is
shown in the diagram. Which of the following statements about energy in
this reaction is the most accurate?
Answer:
Energy is first released then arbsorbed the eventually it dissappears
Explanation:
someone help me what is the difference between alchemy and chemistry
Answer:
Alchemy is based on mystic view of reality whereas chemistry is based on experiments, observations and facts.
In which section(s)/point(s) is the car not moving/at rest?
Answer:
a-b and e-f
Explanation:
At these intervals, there is no change in distance covered as time continues.
3. A 1.000 g sample of an unknown hydrate of copper chloride is gently dehydrated. The copper is isolated and weighs 0.248 g.
Develop a method for determining the empirical formula of the copper compound and for determining the percent by mass of copper in the compound.
Remark: The experimental data table obtained by the student is shown below.
Data:
Mass of crucible 20.43 g
Mass of crucible + CuxCly • zH2O. 21.43 g
Mass of crucible + CuxCly 20.976 g
Answer: not sure on actual answer, but heres a answer on a similar question with just different quantities.
Explanation: just minus the terms i got and u should be okay
what mass of magnesium bromide is produced when 35cm3 of 0.18 mol/dm3 of hydrogen bromide is treated with magnesium nitrate?
Answer:
C3H8
Explanation:
1 1.5mol
2 0.75mol
3 0.667mol
Questions 1.2
1 16.7mol
2 8.3×10−3mol
Questions 1.3
1 9
2 11
3 12
4 24
5 22
Questions 1.4
1 a) 151.9
b) 162.1
c) 60.0
d) 132.1
e) 388.8
2 a) 0.5mol
b) 2.5mol
c) 0.6mol
d) 2.0mol
e) 0.38mol
3 a) 180.6g
b) 44.46g
Questions 1.5
1 Mr = 277.9 moles of oxygen = 11
2 Mr = 474.3 moles of oxygen = 20
Questions 1.6
1 Cu2S
2 C3H8
3 CaFe2O4
Questions 1.7
1 a) 2H2 + O2 → 2H2O
b) I2 + 3Cl2 → 2ICl3
c) NaOH + Al(OH)3 → NaAlO2 + 2H2O
d) 2H2S + SO2 → 3S + 2H2O
e) 4NH3 + 3O2 → 2N2 + 6H2O
2 a) MgCO3 → MgO + CO2
b) Pb(s) + 2AgNO3(aq) → Pb(NO3)2(aq) + 2Ag(s)
c) Na2O(s) + H2O(l) → 2NaOH(aq)
d) 2FeCl2 + Cl2 → 2FeCl3
e) Fe2(SO4)3 + 6NaOH → 2Fe(OH)3 + 3Na2SO4
Questions 1.8
1 17.0g
2 60.7g
3 51.1%
Questions 1.9
1 1.2dm3
2 Volume of SO2 = 50cm3; mass of sulfur = 0.20g
Questions 1.10
1 a) 2.67moldm−3
b) 0.025moldm−3
c) 0.833moldm−3
2 a) 0.75mol
b) 0.044mol
c) 0.010mol
What is respiration? Explain in your own words
Answer:
breathing
Explanation:
Your welcome lol
hope this helps :) pls give brainliest
Answer:
SEE BELOW
Explanation:
The act or process of breathing i.e the inhaling of oxygen and the exhaling of carbon dioxide. The process in which cells use oxygen to break down sugar and obtain energy which is used for various purposes.
Which pair of compounds represents one arrhenius acid and one arrhenius base?.
Explanation:
use the diagram above to understand it
Fission involves the _________________ of an atom into smaller particles, while fusion occurs when smaller particles _________________.
Answer:
1. Splitting
2. Combine
Explanation:
true or false: A person standing still with two heavy bundles is doing a lot of work
NEED HELP!
Find the sum of 4.5 mm and 24.4 mm.
28.9 mm >
6.9 mm
30 mm
29 mm
Answer:
28.9
Explanation:
4.5+24.4
= 28.9
Mark me as a brainlist.I hope this helps you.
Where does Respiration mainly take place in?
A - Mitochondria
B - The nucleus
C - The cell wall
D - The vacuole
Once a hypothesis becomes a theory, is it then considered an absolute fact? Explain.
Answer:
No, a hypothesis can only become a fact if the outcome happens over and over. A theory means that it could be true but the outcome can also be false.
Explanation:
help!!
You see a large number of waves that are very tall. What is the appropriate wave description?
A. Small frequency; small amplitude
B. Large wavelength; large amplitude
C. Large frequency; small amplitude
D. Large frequency; large amplitude
What do you know about other ecosystems in which predators havre caused their prey to go extinct
Answer:
Humans :)
Explanation:
Humans have killed so many species of wolves, deer, tigers, lions and bears oh my!
In the food chain, we, humans are at the top because of this
At a research lab, a scientist carelessly pours cultures of living microbes down the drain
Answer:
that's not good
Explanation:
microbes???? not good for a sewage system
Limiting and Excess Reactant
1. Aluminum chloride, AlCl3, can be made by the reaction of aluminum with chlorine according to the following equation (must be balanced first):
2Al + 3Cl2 ------> 2AlCl3
What are the limiting and excess reactants if 20.0 grams of Al and 30.0 grams of Cl2 are used?
2. Chloroform, CHCl3, reacts with chlorine, Cl2, to form carbon tetrachloride, CCl4, and hydrogen chloride, HCl. In an experiment 25 grams of chloroform and 0.36 mol of chlorine were mixed. Which is the limiting reactant? The equation is given as
CHCl3 + Cl2 -------> CCl4 + HCl
Answer:
1. LR: Cl2, ER: Al 2. LR: CHCl3
Explanation:
1. Find g/moles of Al and Cl2
g/moles of Al: 0.74 and Cl2 is 0.42
We can find the limiting reactant by take those number divided by 2 and 3
0.74 divided by 2 = 0.37
0.42 divided by 3 = 0.14 so 0.14 is the least -> that going to be the limiting reactant. (Cl2)
Now we know Al is a excess reactant.
2. That equation is already balanced and it's already give us 0.36 mole of chlorine, now we just need to find the mole of chloroform ( CHCl3 )
To do that we need to find the molar mass of CHCl3 which is 119.0 g/moles
then take 25 grams ÷ by 119g/moles we will get: 0.21 mole of CHCl3 that's mean CHCl3 is a limiting reactant.
What is the ionization of Ba(OH)2? Please help!
The ionization potential of Ba(OH)2 was found to be 8±1 eV, with a value of 6±1 eV for the monohydroxide.
Calculate the pH for the following solutions and indicate whether each solution is acidic or basic.
[H+] = 2.4 × 10-6M pH = __________ Acid/Base
[tex]\\ \rm\Rrightarrow pH=-log[H^+][/tex]
[tex]\\ \rm\Rrightarrow pH=-log(2.4\times 10^{-6})[/tex]
[tex]\\ \rm\Rrightarrow pH=-log2.4-log10^{-6}[/tex]
[tex]\\ \rm\Rrightarrow pH=-0.38+6[/tex]
[tex]\\ \rm\Rrightarrow pH=5.62[/tex]
AcidWhy do you feel the force of Earth's gravity?
•Why do you feel the force of Earth's gravity?
Answer:
•Earth's gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body. That's what gives you weight. And if you were on a planet with less mass than Earth, you would weigh less than you do here.
Explanation:
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Pls help me on this question and I will grant 100 points and brainly mark for the first 5 correct answers. Also I need it ASAP
Answer:
Explanation:
i) Red as Methyl orange shows red color in acidic medium and hyrdochloric acid is acidic.
ii) In 10cm^3 of 0.100 mole/dm^3 of hydrochloric acid, there are:
10/1000*0.1 = 1.00x10^(-3) moles of hydrochloric acid were used.
9. I have a mixture of iron, salt, and water. I bring a magnet close by. What does the magnet pick up and what is left behind?
Explanation:
magnet will attract iron.
salt and water is left behind
Predict the products
___Cu(NO3)2 + ___NaOH → ___ ________ + ___ ________
___ CuO + 2 HCl → ___ H2O + ___ ________
Answer:
1.) Cu(NO₃)₂ + 2 NaOH --> Cu(OH)₂ + 2 NaNO₃
2.) CuO + 2 HCl --> H₂O + CuCl₂
Explanation:
Both of these reactions are substitution/double displacement reactions. The base reaction looks like this: AX + BY --> AY + BX. In other words, the negative ion of the first molecule bonds to the positive ion of the second molecule, and vice versa.
The products of the first equation are:
Cu(NO₃)₂ + NaOH --> Cu(OH)₂ + NaNO₃
The OH⁻ and the NO₃⁺ are polyatomic ions, meaning they stay together in these types of reactions. When determining the products, make sure to take note of the charges on the ions because subscripts may be necessary to balance them out.
Now you need to balance the coefficients. When balancing equations, begin with an element that is not present in more than one molecule on either side (ex. the oxygen is in two molecules on the reactant side). Keep in mind that the subscripts should be multiplied by the coefficients when determining the number of some elements.
The balanced first equation is:
Cu(NO₃)₂ + 2 NaOH --> Cu(OH)₂ + 2 NaNO₃
The process for the second equation is nearly identical to the first. The balanced second equation is:
CuO + 2 HCl --> H₂O + CuCl₂
Which explanations did you include in your response? Check all that apply. The oxidation number of carbon changes from -1 to +4. The oxidation number of oxygen changes from 0 to -2. Carbon is oxidized. Oxygen is reduced. Electrons are transferred from carbon to oxygen.
Answer:
B, E
Explanation:
Edge