How do you prepare a demi-glace?
Answer:
Explanation:
sory i dont know
3. Compare What is the
difference between a
chromosome and a
chromatid?
(Please answer in a simple sentence)
Answer:
A chromosome is a thread-like structure present in the nucleus that is made up of a single molecule of DNA and proteins, carrying some or all genetic materials of an organism. A chromatid is an identical half of a duplicated chromosome
Explanation:
5. Calculate the mass percent of carbon in C3H8
Answer: How to calculate the mass percent by using these instructions
1.The molar mass is the mass of a given chemical element or chemical compound (g) divided by the amount of substance (mol).
2.The molar mass of a compound can be calculated by adding the standard atomic masses (in g/mol) of the constituent atoms.
Explanation:
A particular beer is 65.0% ethanol by volume . If a single bottle of beer contains a total of 750.0 mL of beer, what volume, in mL of ethanol (C₂H₆O), are present in the bottle?
SHOW CONVERSION
The volume in mL of ethanol (C₂H₆O) present in the bottle is 487.5L
HOW TO CALCULATE VOLUME OF ETHANOL:
According to this question, a particular beer is 65.0% ethanol by volume. This means that the beer contains 65/100 of ethanol. If a single bottle of beer contains a total of 750.0 mL of beer, the volume of ethanol in the bottle is calculated as follows:= 65/100 × 750= 65 × 7.5= 487.5mLTherefore, volume in mL of ethanol (C₂H₆O) present in the bottle is 487.5LLearn more at: https://brainly.com/question/8725232?referrer=searchResults
High temperatures inside Earth form
melted rock.
fossils.
soil.
minerals.
Answer:
minerals
Explanation:
Hope this helps
Which substances will make a salt when combined?
Vinegar and soda
Soda and wine
Detergent and ammonia
Fertilizer and vinegar
Answer:
vinegar and soda
Explanation:
Mixing baking soda (sodium bicarbonate) and vinegar (acetic acid) causes a chemical reaction that produces a salt (sodium acetate) and water, as well as carbon dioxide gas.
Answer:
Fertilizer and vinegar
Explanation:
Fertilizer is a base, and vinegar is an acid. Salt is made when you combine a base and an acid. Plus, I got a 100% on the test and this was my answer.
Synthetic reactions in Citric Acid Cycle
★ « Synthetic reactions in Citric Acid Cycle » ★
The overall reaction for the citric acid cycle is as follows: acetyl-CoA + 3 NAD+ + FAD + GDP + P + 2H2O = CoA-SH + 3NADH + FADH2 + 3H+ + GTP + 2CO2. Many molecules in the citric acid cycle serve as key precursors for other molecules needed by cells.hope it is
Low tides are located at___
A an C
A an B
B an D
Answer: A and C
Explanation:
Low tides occur in locations at 90 degree angles to the moon. Tidal cycles have the same length as the lunar day, 24 hours and 50 minutes. In this time span, most locations will experience two high tides, when the location is close to and far from the moon, and two low tides. Sides A and C are angled 90 degrees from the moon.
Hence, low tides are located at A and C.
Answer:90 degree angles to the moon.
Explanation:
What happens to excess heat produced in the muscle during contraction and relaxation
Answer:
Calcium is then pumped back into the sarcoplasmic reticulum breaking the link between actin and myosin.
Explanation:
Actin and myosin return to their unbound state causing the muscle to relax. Alternatively relaxation (failure) will also occur when ATP is no longer available.
write the electronic configuration of iron in fecl2 and fecl3
Ferrus is a transition metal.
FeCl_2
Valency of Fe is 2 .Hence Z=26-2=24Electronic configuration is given by
[tex]\\ \sf\longmapsto [Fe]^{2+}=1s^22s^22p^63s^23p^64s^23d^4[/tex]
FeCl_3
Valency of Fe is 3Hence Z=26-3=23Electronic configuration is given by
[tex]\\ \sf\longmapsto [Fe]^{3+}=1s^22s^22p^63s^23p^64s^23d^3[/tex]
A flask of water is sealed with a balloon and heated to various temperatures on a hot plate
Answer:
What is the question?
Explanation:
You just gave a statement.
Answer:
it will increase
Explanation:
How many molecules of NaCl are there per mL of the solution?
Explanation:
Nacl is an ionic compound, so there are no molecules only formula units please mark me brainlistplease help n let me know thank u
can anyone heelp me pls pls
Answer:
Lotion=liquid
suspension=semisolid
capusule=solid
Explanation:
According to the periodic table, which two elements have an atomic mass less than twice their atomic number?
Answer:
Hydrogen and oxygen
Explanation:
Hydrogen
2 × atomic number = 2
atomic mass = 1.008 amu
Oxygen
2 × atomic number = 16
atomic mass = 15.999 amu
You have an atom with 17 protons, 18 neutrons, a net charge -1, and a mass of 35. How many electrons does this atom have?
Answer:
this atom have 18 electronsExplanation:
we know that in nutral state of atom , an atom have equal number of protons and electrons ,but in this question this atom is not nutral means it is charged this atom have -1 charge this means it gains 1 electron .in nutral state if an atom have equal number of proton and electron when the atom is charged(gain or lost certain amount of electron) number of electron become proton -the electron it losts or proton + the electron it gainsthis atom have -1 charge this means it gains 1 electron so the number of electron calculated by ; proton + the number of electron it gains; this atom have 17 protons so , number of electron =17+1=18there fore this atom have 18 electrons. I think its helpful for youWhich is not a type of nuclear decay?
A. Zeta
B. Gamma
C. Alpha
D. Beta
Answer:
The answer is Zeta
Explanation:
The three types of nuclear decay are Gamma, Beta, and Alpha.
State TRUE or FALSE : Synthetic fibers resists fire.
All fabrics will burn, but some are more combustible than others.
hope it helps
which among the materials have a varying amount of components are they compounds or mixtures
Answer:
Matter can be broken down into two Zalo categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components.
Which property describes a material's ability to conduct heat?
what is the difference between exergonic and exothermic reactions?
Answer:
An exergonic reaction is a type of chemical reaction that releases free energy to the surroundings. The final state of this reaction is less than its initial state. ... “Exothermic” literally means “outside heating” while “exergonic” literally means “outside work.”
Explanation:
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Have a happy day <3 Miss Hawaii
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Answer:
The process in which plants release water through their leaves back into the air
Explanation
Answer:
The process in which plants release water through their leaves back into the air.
Hope this helps!
Calculate the number of days after the explosion for a sample of iodine-131 to go from 100%
iodine-131 to less than 1% iodine-131. Complete chart.
It will take 56 days to go from 100% iodine-131 to less than 1% iodine-131.
From the table, we can see that the half life of iodine-131 is 8 days. We can see that it takes 8 days to have 50% of iodine-131
After 16 days, we will have 25 % of iodine-131
After 24 days, we will have 12.5 % of iodine-131
After 32 days, we will have 6.25% of iodine-131
After 40 days, we will have 3.125% of iodine-131
After 48 days, we will have 1.5625% of iodine-131
After 56 days, we will have 0.78125% of iodine-131
After 56 days, the percentage of iodine-131 drops to less than 1%.
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How many molecules of carbon dioxide and how many molecules of water would be produced from 4 molecules of methane (CH4) reacting with 8 molecules of oxygen (O2)
Answer:
4
Explanation:
water would be produced from 4 molecules of methane (CH4) reacting with 8 molecules of oxygen (O2)
The products of the combustion of hydrocarbon are 4 molecules of carbon dioxide and 8 molecules of water.
What is the combustion reaction?A combustion reaction can be described as a reaction that produces fire and takes place at a high temperature. It is an exothermic reaction as well as a redox reaction that usually takes place between a fuel and mostly oxygen gas.
Examples of Combustion Reactions such as during the combustion of 4 molecules of methane reacting with 8 molecules of oxygen gas to give carbon dioxide and two molecules of water.
[tex]4CH_4 + 8O_2\longrightarrow 8H_2O + 4CO_2[/tex]
Oxygen is the essential reactant for combustion because the combustion is not possible in the absence of oxygen. Complete combustion takes place when a fuel burns completely to produce heat with oxygen and carbon dioxide.
The burning of wood fuels in the presence of air is an example of combustion. The carbon present in wood reacts with oxygen gas in the air to liberate heat and form gaseous products.
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the pH of soil X is 7.5 while that of soils Y is 4.5 which of the two coils should be treated with powered talked to adjust its PH
Answer:
Soils Y
Explanation:
• The soils with lower pH are acidic so they react readily with powdered.
[tex].[/tex]
Answer:
SOIL Y
the soil with lower ph are acidic
A 3.90 L sealed vessel under vacuum is filled with 6.40 g of fluorine gas. What is the pressure (in kPa) of the vessel at 25.0 ⁰C ?
From the ideal gas law, the pressure of the gas is 106 kPa.
First we must obtain the number of moles of the gas;
Number of moles = mass/molar mass
Molar mass of fluorine gas = 38 g/mol
Number of moles of F2 = 6.40 g/38 g/mol = 0.168 moles
Using the ideal gas equation;
PV = nRT
P = ?
V = 3.90 L
n = 0.168 moles
T = 25.0 ⁰C + 273 = 296 K
R = 8.314 kPa L K-1 mol-1
Substituting values;
P = nRT/V
P = 0.168 moles × 8.314 kPa L K-1 mol-1 × 296 K/3.90 L
P = 106 kPa
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The pressure of the vessel at a temperature of 25 °C is 106.73 KPa
We'll begin by calculating the number of mole of fluorine gas. This can be obtained as follow:
Mass of F₂ = 6.40 g
Molar mass of F₂ = 19 × 2 = 38 g/mol
Mole of F₂ =?Mole = mass / molar mass
Mole of F₂ = 6.40 / 38
Mole of F₂ = 0.168 moleFinally, we shall determine the pressure. This can be obtained as follow:
Volume (V) = 3.90 L
Temperature (T) = 25.0 °C = 25 + 273 = 298 K
Mole of F₂ (n) = 0.168 mole
Gas constant (R) = 8.314 L.KPa/Kmol
Pressure (P) =?PV = nRT
P × 3.9 = 0.168 × 8.314 × 298
P × 3.9 = 416.232096
Divide both side by 3.90
P = 416.232096 / 3.90
P = 106.73 KPaTherefore, the pressure of the vessel is 106.73 KPa
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Using the standardized NaOH solution in the previous
question, the titration of 5.00 mL of vinegar required
42.25 mL of NaOH. What is the % of acetic acid in the
vinegar? Previous standardized NaOH solution = 0.098
Answer: Using the standardized NaOH solution in the previous question, the titration of 5.00 mL of vinegar required 42.25 mL of NaOH. What is the % of acetic acid in the vinegar? Concentration of NaOH from previous question= 0.0986 M. David C.
Explanation:
Please mark as brainliest for me.Thank you so much
The percentage of acetic acid in vinegar is 4.988 %., When the titration of 5.00 mL of vinegar required 42.25 mL of NaOH.
What is titration?Titration is defined as the process of chemical analysis method in which the amount of a sample's constituent is determined by mixing a precisely measured amount of the desired constituent with another material in a precise, known proportion. The equivalence point, or the point at which chemically equivalent amounts of the reactants have been combined, is to be detected by the titration.
According to the titration principle, V1=the volume of acetic acid and V1S1=V2S2
S1 is the acetic acid's strength
V1 = 42.25 ml * 0.0986 M / 5 ml = 0.833 M where V2 = Volume of NaOH S2 = Strength of NaOH
Hence, 1000 ml Vinegar contains 0.833 moles of acetic acid per 100 ml of vinegar (0.0833*60). G=4.998 grams of acetic acid
The amount of acetic acid in vinegar is 4.988%.
Thus, the percentage of acetic acid in vinegar is 4.988 %., When the titration of 5.00 mL of vinegar required 42.25 mL of NaOH.
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Can water molecules form ions by
themselves?
Consider:
2Al (s) + 3Cl2 (g) ----> 2AlCl3 (s) ΔH=-1390.81 kJ
Which of the following correctly describes he magnitude and direction of the enthalpy change when 10.0g of AlCl3 forms?
a. 104.4 kJ, exothermic
b. 52.2 kJ, exothermic
c. 26.1 kJ, exothermic
d. 52.2 kJ, endothermic
e. 26.1 kJ, endothermic
Answer:
The answer is B.
Explanation:
1 mole of AlCl3 = 27 + 3*35.5 grams = 133.5 grams
1 mole / 133.5 = x / 10 Cross multiply
133.5 x = 1 * 10
x = 10 / 133.5
x = 0.0749 moles
Delta H when written the way it is, is on the left side and since it is negative, the reaction must give away 1390.81 kj. The reaction is exothermic.
So now you get the answer between AB and C by setting up a ratio.
2/0.0749 = -1390.81 / x Cross multiply
2x = 0.0749 * -1390.81
2x =- 104.18 Divide both sides by 2
2x//2 = -104.18 / 2
x = -52.09
B
When two atoms bond chemically it is because of the interaction between
A) the nuclei of each atom.
B) the protons in each atoms.
C) all electrons in the atoms.
D) the valence electrons in each atom.
Answer:
C
Explanation:
It depends on the bonding for an explanation.
If one atom is a metal and one is a non metal it will be ionic. This is because one atom transfers its electron to the other atom giving them both a charge. They will then be bonded due to opposite forces of attraction.
If both atoms are non metals it will be covalent. Electrons pair together in the center of two atoms that have merged together and they share their electrons.
(Makes more sense with diagrams)