The computers that help control the machines in the factory
A 35 L tank of oxygen is at 42°C with an internal pressure of 5000.mmHg. If the temperature changes to 88°C, what would the new pressure be ? the volume is held constant
Answer:
5730 mmHg.
Explanation:
The following data were obtained from the question:
Initial temperature (T1) = 42 °C.
Initial pressure (P1) = 5000 mmHg.
Final temperature (T2) = 88 °C.
Final pressure (P2) =.?
Next we shall convert celsius temperature,T(°C) to Kelvin temperature, T(K).
This can be obtained as follow:
T(K) = T(°C) + 273
Initial temperature (T1) = 42 °C.
Initial temperature (T1) = 42 °C + 273 = 315 K
Final temperature (T2) = 88 °C.
Final temperature (T2) = 88 °C + 273 = 361 K
Finally, we shall determine the new pressure.
Since the volume of the container is constant, the new pressure can be obtained as follow:
Initial temperature (T1) = 315 K.
Initial pressure (P1) = 5000 mmHg.
Final temperature (T2) = 361 K.
Final pressure (P2) =.?
P1/T1 = P2/T2
5000/315 = P2/361
Cross multiply
315 x P2 = 5000 x 361
Divide both side by 315
P2 = (5000 x 361) / 315
P2 = 5730.1 ≈ 5730 mmHg
Therefore, the new pressure is 5730 mmHg.
Matter is composed of exceedingly small particles called atoms. An atom is the
smallest unit of an element that can participate in a -------
Answer:
Matter is composed of exceedingly small particles called atoms. An atom is the
smallest unit of an element that can participate in a chemical reaction.
Answer:
Chemical reaction.
Explanation:
Based on my previous question I have posted.. Answer this.. It's the continuation
Table 7.3 is different
Answer:
We don't know what solvent X and solvent Y are, but from the chart, we can see that in solvent X, hydrochloric acid can conduct electricity (bulb lights up), and react with calcium carbonate.
So, we can say the electrical conductivity when HCl is dissolved in solvent X is high, and when HCl is dissolved in solvent Y, the electrical conductivity is low (because light bulb doesn't light up).
Additionally, in solvent X, HCl ionizes, this shows the property of acids: reacts with carbonates to give CO2 (because CO2 reacts with lime water to make it cloudy).
In solvent Y, HCl does not ionize, so there is no reaction between acid and calcium carbonate.
What is the [tex]K_{c}[/tex] Expression for the following reaction [tex]C_{6}H_{12}O_{6} + O_{2} \ \ - \ \ \textgreater \ 6H_{2}O+6CO_{2}[/tex] NO ABSURD ANSWERS!
Answer:
[tex]\boxed{\mathrm{view \: explanation}}[/tex]
Explanation:
This is an irreversible reaction, we cannot derive any [tex]\mathrm{K_c}[/tex] expression for it. The [tex]\mathrm{K_c}[/tex] expression can only be derived for reversible reactions and not irreversible reactions. We cannot derive the [tex]\mathrm{K_c}[/tex] expression for this reaction.
what is the smallest particle which prossesses the properties of a compound called?
Answer:
Molecule
Explanation:
Compounds are chemical substances comprising of two or more elements. The smallest particle contained in a compound is the MOLECULE. Molecules are combinations of atoms (same or different) of an element held together by a chemical bond.
Since a compound is a molecule with two or more elements combined, the chemistry of the molecules contained in a compound determines its chemical properties. This means that the molecules of a compound are responsible for the interactions of a compound in a chemical reaction. Examples of molecules are H2O, N2, O3 etc.
How many atoms are in 10g of Al
Answer:
2.22 x 10²³
Explanation:
number of atoms = mole x 6 x 10²³first we have to find number of moles
moles = mass(g) / molar mass (Mr) (g/mol)mol = 10/27
mol= 0.37 mol
Now,
number of atoms = mole x 6 x 10²³
= 0.37 x 6 x 10²³
= 2.22 x 10²³
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You are a forensic scientist working on a murder case. You have taken the blood sample from the crime scene and put it through Electrophoresis and Southern blotting. What step do you need to take next? A. Add ethanol B. Add restriction enzymes C. Add minisatellites D. Add radioactive probes
Add minisatellites. Hence, option C is correct.
What is Electrophoresis?Electrophoresis is a laboratory technique used to separate DNA, RNA or protein molecules based on their size and electrical charge.
You are a forensic scientist working on a murder case. You have taken the blood sample from the crime scene and put it through Electrophoresis and Southern blotting. you need to add minisatellites.
Hence, option C is correct.
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Q1. Because metals are malleable, we use some of them to make saucepans. Give two other examples of uses of metals that depend on: (a):their malleability. (b):their ductility. (c):their ability to conduct electricity. [3]
Explanation:
(a):their malleability:
>iron making. iron worker heat the meat and hammer it to give them the desired shape.
> in the jewelry making process, like the gold or silver you wear are results due to the malleability of metal
(b):their ductility:
>for the making of high tension cable that connects different cities for transferring of electricity.
>for making wire gauze
(c):their ability to conduct electricity:
>for lighting up your house with light bulbs
>for using cooking stoves
>to make refrigerator work.
Answer:
a)gold and silver-used to make jewellery
b)gold and copper(we draw them in wires easily because they are not brittle)
c)copper and iron(this is because both of them are metal and metaps are best conductors of electricity)
Explanation:
uses of copper- to make utensils
to make wires for circuits
uses of silver-to make jewellery
to make mirrors
malleability is the property of a meta in which the metal can be changed into different shapes.
Ductility-can be drawn into thin wires.
The reaction between hydrogen gas and chlorine gas produces hydrogen chloride according to the following equation: H2(g) + Cl2(g) → 2HCl(g). Using the following bond enthalpies(D) calculate the enthalpy of reaction. D(H-H) =436 kJ/mol; D(Cl-Cl) = 243 kJ/mol D(H-Cl) = 432 kJ/mol
Answer:
The enthalpy of reaction is -185 kJ
Explanation:
To get the reaction:
H₂(g) + Cl₂(g) → 2 HCl(g)
you must follow the following steps:
1) Reactive molecules must break their bonds to obtain their atoms.
H₂(g) → 2 H(g)
Cl₂(g) → 2 Cl(g)
Bond energy (or enthalpy) is the energy required to break one mole of bonds of a gaseous substance. In the case of diatomic molecules with a single bond, it corresponds to the energy necessary to dissociate 1 mole of said substance in the atoms that form it.
Whenever you want to break links you must supply energy, so the link enthalpy will have positive values; while when a mole of bonds is formed energy is released and the bond enthalpy of this process will be negative.
In this case you will then have:
H₂(g) → 2 H(g) ΔH=436 kJ/mol
Cl₂(g) → 2 Cl(g) ΔH=243 kJ/mol
So the total energy needed to break all the bonds is:
ΔH=1 mol*436 kJ/mol +1 mol* 243 kJ/mol= 679 kJ
2) The atoms that were obtained in the break of the bonds must be combined to obtain the product.
2 H (g) + 2 Cl (g) → 2 HCl (g)
Being the single bond energy for one mole of 431 kJ H-Cl bonds and considering that two moles of H-Cl bonds are formed, the ΔH is:
ΔH = -2 moles* (432 kJ/mol) = -864 kJ
As mentioned, when a mole of bonds is formed energy is released, the bond enthalpy of this process will be negative. So the formation of HCl is negative.
Hess's law states that the energy change in an overall chemical reaction is equal to the sum of the energy changes in the individual reactions comprising it. So:
ΔHtotal= -864 kJ + 679 kJ
ΔHtotal= -185 kJ
The enthalpy of reaction is -185 kJ
Help ya girl out plz
Answer:
The correct option is B
Explanation:
just did it edg 2020.
Answer:
the answer is c
Explanation:
what is a conjugate acid
THE conjugate acid, within the acid–base theory, is a chemical compound formed by the reception of a proton by a base—in other words, it is a base with a hydrogen ion added to it, as in the reverse reaction it loses a hydrogen ION.
Which of the following elements does not lose an electron easily? NA F MG AL
Answer:
F
EXPLANATION
Among the given elements fluorine(F)can not lose electrons easily because of its high electron affinity, high nuclear charge and high electronegativity.
Answer:
F
Explanation:
it won't lose electron , rather it would gain electron to complete its octate......
Electronic Configuration of F = 2,7
So F will gain 1 electron ....
Explain why all glassware must be dry and the solvent anhydrous during formation and reaction of a Grignard reaction. Explain why it is advisable to not clean your glassware with acetone before a Grignard reaction. Include balanced chemical equations in your answer. (4 pts)
Answer:
The Grignard reagent will be destroyed
Explanation:
The Grignard reaction is based on a carbanion production (RMgX). If water is present in the glassware, a reaction can take place with [tex]H_2O[/tex] and the desired product will not be produced. Because an "H" would be transferred from water to the Grignard reagent. (See figure 1)
If we have acetone in the glassware we will have a similar problem. The Grignard reagent would be destroyed and the desired product will not be produced. The Grignard reagent will attack the carbon in the carbonyl group and the carbanion would disappear. (See figure 2)
How can the rate constant be determined from the rate law
Answer: The rate constant is the reaction rate divided by the concentration terms.
unknown substance is heated from 10 celsius to 25 celsius, what happens at 17 Celsius
At 17 celsius ❤️
it will start to boil ❤️
#indian❤️
what is heat energy
Answer:
Movement of tiny particles called atoms, molecules and ions in a solids,liquid and gases. Heat energy can be transferred from one object to another. The transfer or flow due to the difference in temperature between the two objects is called heat.
When lithium metal reacts with fluorine gas it forms the ionic compound lithium fluoride (LiF). What is the correct electron configurations of the ions formed
Answer:
The electronic configuration of ions formed are:
Li+ (2) => 1s2
Cl- (18) => 1s2 2s2 2p6 3s2 3p6
Explanation:
Lithium metal, Li will lose 1 electron to lithium ion Li+. Chlorine atom, Cl will receive the 1 electron to form the chloride ion Cl- as shown by the following equation below:
Li —> Li+ + e
Cl+ e —> Cl-
Combine both equation
Li + Cl + e —> Li+ + Cl- + e
Cancel out 'e'
Li + Cl —> Li+ Cl-
Thus, we can write the electronic configuration for the reaction as follow:
Before reaction:
Li (3) => 1s2 2s1
Cl (17) => 1s2 2s2 2p6 3s2 3p5
After reaction
Li+ (2) => 1s2
Cl- (18) => 1s2 2s2 2p6 3s2 3p6
Therefore, the electronic configuration of the ions formed are:
Li+ (2) => 1s2
Cl- (18) => 1s2 2s2 2p6 3s2 3p6
For reaction: 2 C + O2 --> 2 CO2 If 5.50 g C was reacted with enough O2, what would be the volume (in liter) of the CO2 generated at STP? (0 C and 1 atm)
Answer:
10.2 L of CO₂
Explanation:
Our reaction is:
2C + O₂ → 2CO₂
We convert the mass of C, to moles:
5.50 g / 12g/mol = 0.458 moles
Ratio is 2:2, so if 2 moles of C can produce 2 moles of CO₂ then 0.458 moles of C would produce 0.458 moles of gas.
By the Ideal Gases Law, we know that 1 mol of gas is contained in 22.4L, so:
0.458 mol . 22.4L / 1mol = 10.2 L
what is the relationship between ph and poh?
Answer:
pH and pOH denote the negative log of the concentration of hydrogen or hydroxide ions. High pH means that a solution is basic while high pOH means that a solution is acidic. ... So here the basic definition of pH is that it's equal to negative log base 10 of the concentration of protons in your solution.
pH and pOH are inversely proportional to one another i.e. as one increases, the other decreases and vice versa.
What is pH and pOH?pH and pOH are terms used to measure the level of acidity or alkalinity of a substance.
A basic solution has a pOH less than 7, while an acidic solution has a pOH greater than 7.
On the other hand, a basic solution has a pH greater than 7 while an acidic solution has a pH lesser than 7.
Therefore, it can be said that pH and pOH are related inversely i.e. as one decreases, the other increases.
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A substance contains 23.0 g sodium, 27.0 g aluminum, and 114 g fluorine. How many grams of sodium are there in a 102-g sample of the substance? Select one: a. 4.43 g b. 23.0 g c. 14.3 g d. 102 g e. None of these
Answer:
E. None of the above
Explanation:
How many significant figures are there in 6.07x10^-15?
Answer:
3
Explanation:
6.07 has 3 digits and all are significant
what is the difference between the atom and isotope
Answer:
Atoms consist of a nucleus made of protons and neutrons orbited by electrons.
Isotopes are atoms that have same number of protons but they differ in the number of neutrons and in atomic mass.
Answer:
Isotopes are atoms that have the same numbers of protons but different numbers of neutrons. An ion is an atom that has gained or lost electrons, so it now has more or fewer electrons than it does protons. So an ion has a negative or positive charge.
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Place the following substances in order of decreasing vapor pressure at a given temperature: BeF2, CH3OH, OF2?
(a) OF2 > BeF2 > CH3OH
(b) BeF2 > OF2 > CH3OH
(c) BeF2 > CH3OH > OF2
(d) CH3OH > OF2 > BeF2
(e) OF2 > CH3OH > BeF2
Answer:
(b) BeF2 > OF2 > CH3OH
Explanation:
The degree and type of intermolecular forces present in a substance influences its vapour pressure considerably. The greater the magnitude and strength of intermolecular forces in the substance, the lower the vapour pressure of the substance.
BeF2 molecules are held together by weak vanderwaals forces hence BeF2 will exhibit the least degree of intermolecular interaction and have the highest vapour pressure. OF2 molecules are bound together by dipole interactions hence it will exhibit a lower vapour pressure compared to BeF2. CH3OH molecules form hydrogen bonds with water molecules hence it will exhibit the least vapour pressure among the trio.
Flask is immersed in a large beaker of very hot water. At first, the level of the liquid in the tube falls, but after a short time it rises. Explain why the liquid level in the tube stops falling and starts to rise.
Answer:
Explanation:
When a flask is dipped in very hot water in a large beaker , the flask expands due to heat gain . As a result , level of water in tube fitted in flask goes down .
After some time , the water inside tube also become hot so it expands . coefficient of volume expansion of water is more than coefficient of volume expansion of glass . Hence greater expansion takes place in the volume of water . It is due to this fact that water level in tube starts rising after some time of fall .
Give one reason why water gas and producer gas are prepared together in the same furnace. Pls ansa its urgent
Answer:
because water gas has high heat content more than producer gas
Explanation:
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If 156.06 g of propane, C3H8, is burned in excess oxygen, how many grams of water are formed? C3H8 + O2 → CO2 + H2O Select one: a. 255.0 b. 765.1 c. 191.3 d. 31.88
Answer:
The correct option is;
a. 255.0 g
Explanation:
The given information are;
Mass of propane, C₃H₈ in the combustion reaction = 156.06 g
The equation of the combustion reaction is C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
From the balanced chemical equation of the reaction, we have;
One mole of propane, C₃H₈ reacts with five moles oxygen gas, O₂, to form three moles of carbon dioxide, CO₂, and four moles of water, H₂O
The molar mass of propane gas = 44.1 g/mol
The number of moles, n, of propane gas = Mass of propane gas/(Molar mass of propane gas) = 156.06/44.1 = 3.54 moles
Given that one mole of propane gas produces 4 moles of water molecule (steam) H₂O, 3.54 moles of propane gas will produce 4×3.54 = 14.16 moles of (steam) H₂O
The mass of one mole of H₂O = 18.01528 g/mol
The mass of 14.16 moles of H₂O = 14.16 × 18.01528 = 255.0 g
The mass of H₂O produced = 255.0 g
What is organic chemistry
Explanation:
Hi there!!!
The organic chemistry is a branch of chemistry which deals with the study of hydrocarbons compounds. organic chemistry deals with the study of structure, properties and reactivity of carbon compounds. It is a very broad area where more than 100000 organic compounds are studied.
Hope it helps..
What would be the charge on an ion whose neutral atom has an electron configuration of 2.8.7?
O A. +7
OBO
C. +1
Answer:
–1
Explanation:
The electronic configuration of the neutral atom is given below:
2 8 7
From the electronic configuration of the neutral atom, we can see that the atom has 7 electrons in it's outermost shell. This implies that the element needs 1 more electron to complete it's octet configuration.
Therefore the charge on the ion of the element will be –1 indicating that the atom has received 1 electron to complete it's octet configuration.
A container initially holds 5.67 x 10^-2 mol of propane and has a volume of V1. The volume of the container was increased by adding an additional 2.95 x 10^-2 mol if propane to the container, so that the container has a final volume of 1.93 L. If the temperature and pressure are constant, what was the initial volume of the container?
Answer:
Initial volume of the container (V1) = 1.27 L (Approx)
Explanation:
Given:
Number of mol (n1) = 5.67 x 10⁻²
Number of mol (n2) = (5.67 +2.95) x 10⁻² = 8.62 x 10⁻²
New volume (V2) = 1.93 L
Find:
Initial volume of the container (V1)
Computation:
Using Avogadro's law
V1 / n1 = V2 / n2
V1 / 5.67 x 10⁻² = 1.93 / 8.62 x 10⁻²
V1 = 10.9431 / 8.62
Initial volume of the container (V1) = 1.2695
Initial volume of the container (V1) = 1.27 L (Approx)
Answer: 1.27 L
Explanation:
First, calculate the final number of moles of propane (n2) in the container.
n2 = n1 + nadded = 5.67 × 10^−2 mol + 2.95 × 10^−2 mol = 8.62 × 10^−2 mol
Rearrange Avogadro's law to solve for V1.
V1 = V2 × n1 / n2
Substitute the known values of n1, n2, and V2,
V1 = 1.93 L × 5.67 × 10^−2 mol / 8.62 × 10^−2 mol = 1.27 L
Which element would have properties most similar to those of
cesium (Cs)?
O A. Rb
B. Ca
C. Sr
D. Ba.
Answer:
Rb
Explanation:
This is because they are in the same group which means they share similar properties.
What do rubidium and cesium have in common?
This family consists of the elements lithium, sodium, potassium, rubidium, cesium, and francium (Li, Na, K, Rb, Cs, and Fr, respectively). Group one elements share common characteristics.
What are the physical and chemical properties of caesium?
It is silvery gold, soft, and ductile. It is the most electropositive and most alkaline element.
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