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Questions and task on the subject Chemistry
How many kilojoules of heat are absorbed when 950 mL of water is heated from 27 degrees Celsius to 79 degrees Celsius? The specific heat of water is 4.18 J/g-C. Answer choices: 104...
Chemistry
05.02.2023 09:40
3 answer(s)
Not a timed or graded assignment. Please show all calculation work. Question prompt “what mass of the excess reactant HCI will be used”. Quick answer showing work = amazing review...
Chemistry
04.02.2023 03:50
3 answer(s)
If we have 4.50 mol of sodium and 2.25 mol of iron (III) nitrate which reactant is the limiting reactant?...
Chemistry
02.02.2023 14:00
3 answer(s)
What is the pressure of a gas of 0.0925 moles occupies 152 ml at 185 degrees celcius...
Chemistry
01.02.2023 20:30
2 answer(s)
What do cocaine, amphetamines, caffeine, nicotine, and MDMA (ecstasy) all have in common? Select one: a. They all increase the activity of the nervous system. b. They all cause h...
Chemistry
30.01.2023 19:20
2 answer(s)
Which form of energy can be connected closely to climate change? a) coal b) wind c) hydroelectric d) solar...
Chemistry
29.01.2023 08:50
3 answer(s)
A gas mixture contains 1.26 g N2 and 0.76 g O2 in a 1.51 L container at 11 C. Calculate the partial pressure of N2?...
Chemistry
28.01.2023 14:00
1 answer(s)
Chapter 6 Question 34 - AlgorithmicThe element that has a valence configuration of 3s2 3p6 is .- Choices:ArRnKrNeXe...
Chemistry
28.01.2023 09:30
2 answer(s)
___ K +_ 0₂ → _K₂0 Balance Chemical Equation...
Chemistry
28.01.2023 07:10
2 answer(s)
Profiles Tab Window HelpE- CengageNOW Online texgmenttakeCovalentActivity. do?locator assignment-takeTUTOR Percent YieldCengage: Digital Course S xResubmit[References]Consider this...
Chemistry
27.01.2023 09:10
3 answer(s)
In two to three sentences, explain the importance of the following in a nuclear reactor: control rods containment structure a moderator...
Chemistry
26.01.2023 22:40
2 answer(s)
Hydrogen emits light with a wavelength of 410 nm. Find the frequency of this light. Find the energy contained by a single photon of this light in kJ....
Chemistry
25.01.2023 20:20
2 answer(s)
I need help with solving this problem...
Chemistry
23.01.2023 17:20
2 answer(s)
The concentration f the sugar glucose (c6h12o6) in human blood ranges from 80 mg/dl before meals up to 120 mg/dl after eating. find the molarity of glucose in blood before eating....
Chemistry
23.01.2023 06:50
2 answer(s)
Hey, this is basically almost a free point (just multiple choice of 1 pressure)...
Chemistry
21.01.2023 22:20
1 answer(s)
during electrolysis three observations are made: the size of both the anode and cathode change. a solid appears directly beneath the anode. the colour of the coper sulfate solution...
Chemistry
18.01.2023 00:00
3 answer(s)
Copper(II) sulfate crystals, CuSO4.5H₂O, can be made by heating copper(II) oxide with dilute sulfuric acid and then crystallising the solution formed. a Calculate the maximum mas...
Chemistry
16.01.2023 02:40
1 answer(s)
What do you notice about the names of the cations and anions on the cards. How do they compare with the name of the neutral atom or element? Do the non-metals have anything in comm...
Chemistry
09.01.2023 02:10
2 answer(s)
The equation for the complete combustion of hexane is shown. CH₁ + 91/20₂ → 6CO₂ + 7H₂O How many molecules of carbon dioxide are formed when 2 x 10³ mol of hexane undergoes compl...
Chemistry
06.01.2023 07:10
3 answer(s)
A gas occupies 1.56 L at 101.3kpa. What will be the volume of this gas if the pressure becomes 45.5kpa?...
Chemistry
02.01.2023 17:10
2 answer(s)
What is the total concentration of phosphate ions (in M) in a 2. 1 M aqueous solution of magnesium phosphate?...
Chemistry
24.12.2022 14:00
2 answer(s)
The specific heat of a certain type of cooking oil is 0.418 cal/(g·°C). How much heat energy is needed to raise the temperature of 1.227 kg of this oil from 23.0 °C to 60.0 °C?...
Chemistry
23.12.2022 14:00
2 answer(s)
The number of neutrons present in the nucleus of an average atom of any given element is best estimated by:-...
Chemistry
18.12.2022 23:40
3 answer(s)
classify each of these reactions. a single reaction may fit more than one classification. ba(clo3)2⟶bacl2 3o2 double‑displacement (a. k.a. exchange or metathesis) combination (synt...
Chemistry
15.10.2022 20:40
2 answer(s)
calcium is obtained industrially by electrolysis of molten cacl2 and is used in aluminum alloys. how many coulombs are needed to produce 20.2 g of ca metal? if a cell runs at 15 a,...
Chemistry
07.10.2022 18:10
2 answer(s)
what is the molarity of a 10.4 %% by mass glucose (c6h12o6)(c6h12o6) solution? (the density of the solution is 1.03 g/mlg/ml .)...
Chemistry
07.10.2022 07:40
1 answer(s)
in a solution of high ph, all of the acidic and basic sites in an amino acid are group of answer choices protonated deprotonated negatively charged more than one correct response n...
Chemistry
06.10.2022 14:00
2 answer(s)
Identify which of the following statements are TRUE. The composition of a pure substance is variable. The density of a pure substance is fixed. The properties of mixtures are con...
Chemistry
28.09.2022 03:10
3 answer(s)
Why are the atomic masses of isotopes different?...
Chemistry
25.09.2022 02:10
1 answer(s)
If the distance between 2 objects increased, what would happen to the force of gravity between them....
Chemistry
22.09.2022 14:00
2 answer(s)
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