A setup that involves material, a procedure, observations, and data can be found in a a(n)

Answer:

Volume of heptane in cylinder = 51.2mL

Volume of water = 33mL

Explanation:

Density(g/mL) = mass/ Volume

》Volume = mass/ Density

Please prompt me if I'm wrong in my workings. Hope this helped.

Answer:

81 °C

Explanation:

This is a calorimetry question so a few things you will need for this. The calorimetry equation q=mcΔT & the specific heat of water (4.2J/g•°C). Other definitions are:

q = heat added/released by a sample

m = mass of sample

c=specific heat of sample

ΔT = change in temperature

from here we can rearrange the equation to state:

q/(mc) = ΔT

1200J/((20.0g)(4.2J/g•°C)) = ΔT

14°C = ΔT

If the starting temperature was 95.0°C and we know that the temperature was cooled by 14°C then the final temperature of the water would be 81.

Answer:

C. 81 c

Explanation:

took the test :)

Explanation:

To reduce costs, powdered aluminium oxide is dissolved in molten cryolite. This ionic compound melts at a lower temperature than aluminium oxide, reducing costs.

Answer:

no bueno

Explanation:

Answer:

[tex]\boxed {\boxed {\sf 76.1 \ g/mol}}[/tex]

Explanation:

We are asked to find the molar mass of C₃H₈O₂.

The molar mass is the mass of 1 mole of a substance. The values are found on the Periodic Table because they are equivalent to the atomic masses. However, the units are grams per mole instead of atomic mass units.

Look up the molar masses of the individual elements in the compound: carbon, hydrogen, and oxygen.

Look at the subscripts in the formula. There is a subscript of 3 after C, another of 8 after H, and another of 2 after O. Therefore, there are 3 moles of carbon, 8 moles of hydrogen, and 2 moles of oxygen in every mole of the compound. Multiply the element's molar mass by the subscript.

[tex]36.033 + 8.064 + 31.998 = 76.095 \ g/mol[/tex]

Round to the 3 significant figures. For the number we calculated, that is the tenths place. The 9 in the hundredth place to the right tells us to round the 0 up to a 1.

[tex]76.1 \ g/mol[/tex]

The molar mass of  C₃H₈O₂ is approximately 76.1 grams per mole.

Note:-

Approximate Values taken for Atomic masses

Solution:-

[tex]\\ \rm\longmapsto C_3H_8O_2[/tex]

[tex]\\ \rm\longmapsto 3(12u)+8(1u)+2(16u)[/tex]

[tex]\\ \rm\longmapsto 36u+8u+32u[/tex]

[tex]\\ \rm\longmapsto 44u+32u[/tex]

[tex]\\ \rm\longmapsto 76u[/tex]

[tex]\\ \rm\longmapsto \approx76g/mol[/tex]

Answer:

Answer:

mercury

Explanation:

because mercury can get turned into liquid in any normal rrom temperature

Answer:

what is the story about actually.i think it's from ur lesson

Explanation:

certain breads mold easily...(fact)..

especially white bread., when exposed to any moisture, from refrigeration, or freezing..

when taken out of (cold environment), humidity in air causes molding because you take it from cold to/warm environment.

check expiration dates, keep refrigerated, and inspect 4 molding. Companies like WMART, buy in bulk, when on shelf, defrosts,, then has molding within expiration dates..

Answer:

laboratory/safety shower.

Otherwise, immediately wash with water and tell your teacher or instructor.

Answer:

I HOPE IT WILL HELP YOU A LOT.

Answer:

Start, Finish

Explanation:

Reactants react. Products are the end result.

Answer:

yes

Explanation:

Anything that is verifiable and repeatable is likely to be true. If not verifiable and repeatable, then it may well be completely false, or at least partially false.

This holds for much more than just religious beliefs. What about political thought? One perfect example was when President Obama was pushing his ACA (Obamacare). His facile claim was that with medical coverage for all, the costs of health care would go down. Because people would take better care of themselves, avoiding those major medical bills. But that's just a banality, right? Just words that sound good. I'm not saying that morally, universal health care is wrong. I am saying, don't assume something to be true just because it sounds good. (Of course, health care costs went up, not down.)

Is it true that if you get your car washed every week, it will last longer and cost you less in the long run? Of course not. But it sounds good. People will nod their heads in mindless, lazy agreement. You'll have a cleaner car, you will most likely pay more, and it may last less long, depending on any number of factors. Exactly the same as health care

I think it's 6

Explanation:

zeros between other nonzero digits are significant

ex. 50.3 has 3 significant figures. ex. 8101.01 has 6 significant figures

Answer:

Which

PLEASE MARK AS BRAINLIEST ANSWER

Answer:

Molecules of compounds have atoms of two or more different elements. For example, water (H2O) has three atoms, two hydrogen (H) atoms and one oxygen (O) atom.

Explanation:

Answer:

increase with increases in temperature

Explanation:

please mark me brainleast

Answer:

solid: ice.

liquid: water

gas: methane

plasma: lightning

Explanation:

Answer: Alum is used in water treatment as a germicide

Explanation:

A. a germicide

Answer:

C

Explanation:

The early ideas of the atom states that the indivisible object is hollow or is a solid object with nothing inside. The later discoveries or works of the scientists states that inside the atoms are the subatomic particles which are the electrons, protons, and neutrons.

Answer:

The number of protons in an element is the same thing as the element's atomic number. Which means that bringing any change to the number of protons in an element by decreasing it would change the element  as well as the number in the nucleus completely.

Answer:

Hi, There! :)

If you change the number of protons an atom has, you change the type of element it is. If you change the number of neutrons an atom has, you make an isotope of that element.

Answer:

If you change the number of protons an atom has, you change the type of element it is. If you change the number of neutrons an atom has, you make an isotope of that element. All known elements are arranged on a chart called the Periodic Table of Elements.

Explanation:

that's what I found buddy

i found this. there's more coming up

Answer:

so i think mass of water is 235 ml

Answer:

B. Physical process is the way distillation can be separated.

Answer:

Overall, the main function of the corolla is to assist in the reproductive process of the plant. The petals of the corolla are designed to aid in pollination, and therefore, increase the chance of successful reproduction of the flower.

to assist in the reproductive process of the plant...

Answer:

Magnesium reacts with dilute hydrochloric acid in a conical flask which is connected to an inverted measuring cylinder in a trough of water. The volume of hydrogen gas produced is measured over a few minutes, and the results are used to plot a graph

Explanation:

Hope it will help you

Answer:

Adding magnesium metal to hydrochloric acid produces hydrogen gas. The magnesium dissolves to form magnesium chloride, MgCl2.

burning. If you observe a gas forming, test for its identity by inserting a glowing wood splint into the mouth of the test tube. ... This is a “glowing splint.” If the splint continues to glow, oxygen gas is present. Do not put the splint into the solution.

hope it's help you....!!!!!!

#rishu

Answer:

» Reactivity and color

Explanation:

though color is very minor answer because it also relates to a physical property.

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