3) During the day at 27°C a cylinder with a sliding top contains 20.0 liters
of air. At night it only holds 19 liters. What is the temperature at night?

Answer:

15g

Explanation:

hope this helped

Answer:

im not sure go with the first

Explanation:

Answer:

Power plants are not located in cities. Power has to travel a long distance over power lines to reach cities.

Explanation:

Answer:

Low-density polyethylene is manufactured by the process of the polymerization of ethylene at very high temperatures in a tubular reactor. In this tubular reactor, high-pressure polymerization allows further copolymerization of ethylene with polar co-monomers. The tubular process has an advantage over autoclave process.

Explanation:

please mark brainliest

Answer:

Photosynthesis in plants converts solar energy into chemical energy using electrons and protons from water. in plants involves a series of steps and reactions that use solar energy, water, and carbon dioxide to produce organic compounds and oxygen.

Explanation:

Answer:

its is used to make sugar which plants eat think it goes through like glycose or something

Explanation:

1) Using Gas In The Home. In our homes, we end up utilizing the material every day.

2) Use In The Industrial Sector. The industrial sector makes similar use of natural gas liquids as a fuel for process heating and raw material to produce chemicals, fertilizers, and hydrogen.

3) Transportation.

Hope this helps. Btw, I love ur pfp!

Answer:

1) Using Gas In The Home. In our homes, we end up utilizing the material every day. ...

2) Use In The Industrial Sector. The industrial sector makes similar use of natural gas liquids as a fuel for process heating and raw material to produce chemicals, fertilizers, and hydrogen.

3) Transportation.

Answer: D

Explanation:  Irregular galaxies

Answer:

Your answer is D

Explanation:

Irregular galaxies do not have a regular structure.

The mass of water will be produced from 150 grams of iron (III) oxide is equal to 50.7 g.

A chemical equation depicts a chemical reaction in terms of symbols of the substances. A chemical equation consists of reactants participating, products, and their physical states.

The law of conservation of mass should be followed by a balancing of a chemical equation so that the number of atoms of substances is equal on either side of the equation is a balanced chemical equation.

Given the balanced chemical equation of the reaction of iron oxide and hydrogen:

[tex]Fe_2O_3 + 3H_2 \longrightarrow 2Fe + 3H_2O[/tex]

Given, the mass of the iron oxide = 150 g

The number of moles of iron oxide = 159.69 g/mol

The number of moles of iron (III) oxide = 150/159.69 = 0.939 mol

One mole of iron (III) oxide produces water = 3 mol

Then 0.939 mol of iron (III) oxide produces water = 3 ×0.939 = 2.82 mol

The mass of water produced = 2.82 ×18 = 50.7 g

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Answer: Temperature is an objective measurement of how hot or cold an object is. It can be measured with a thermometer or a calorimeter. It is a means of determining the internal energy contained within a given system.

Explanation:

Answer:

Temperature is a physical quantity that expresses hot and cold

Explanation:

Temperature is a physical quantity that expresses hot and cold. This is how the air feels and how hot/cold something is. The less tight the atoms are, the hotter something is. The more tight the atoms are, the cooler something is.

Answer:

[tex]H_{rxn}=-34.36\frac{kJ}{mol}[/tex]

Explanation:

Hello there!

In this case, according to the given information, it is possible to realize that the heat released by the reaction is used up to heat up the mixture, which means we can write:

[tex]-Q_{rxn}=Q_{sol}[/tex]

Whereas the Q of solution is given by the total mass (3.644+42.054), the specific heat of the solution and the change in temperature; thus, we obtain:

[tex]-Q_{rxn}=(3.644g+42.054g)*4.18\frac{J}{g\°C}*(36.2\°C-27.8\°C)\\\\ Q_{rxn}=-1604.55J[/tex]

Next, by computing the moles of the solute, we can proceed to compute the kJ/mol for the enthalpy of reaction (dissolution):

[tex]n=\frac{3.644g}{78.01g/mol}=0.0467mol\\\\H_{rxn}=\frac{Q_{rxn}}{n}\\\\ H_{rxn}=\frac{-1604.55J}{0.0467mol}*\frac{1kJ}{1000J}\\\\ H_{rxn}=-34.36\frac{kJ}{mol}[/tex]

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Answer:

a

Explanation:

Answer:Abundant evidence supports the major contentions of the seafloor-spreading theory. First, samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge is approached, and the sediment cover is thinner near the ridge.

Explanation:

Answer: The correct option is option B (the concentrations of the reactants and products have reached constant values).

Explanation:

CHEMICAL EQUILIBRIUM is defined as a state which is attained in a chemical system where by forward reaction occurs at the same rate with the backward reaction leading to CONSTANT CONCENTRATIONS of the reactants and the products. Chemical equilibrium is achievable in a closed Chemical system so that none of the reactants or products would escape be they gaseous or otherwise.

Chemical equilibrium occurs in a type of reaction called reversible reactions. Reversible reactions is one that can go in either direction depending on the condition of the system. In other words, reactants form products and under favourable conditions products react together to reform the reactants. For example,

3Fe(s) + 4H2O(l) <-------> Fe3O4(s) + 4H2(g)

As the above reversible reaction proceeds, a time is reached when the rate of forward reaction { which is the formation of Fe3O4(s) + 4H2(g)} is equal to the rate of the backward reaction {which is the formation of 3Fe(s) + 4H2O(l)}. At this point, concentrations of the reactants and products have reached constant values.

When a chemical system is at equilibrium then the concentrations of the reactants and products have reached constant values.

Chemical equilibrium is a state occur in any reversible reaction, where the rate of forward reaction is equal to the rate of backward reaction and it is represent as:

A + B ⇄ C + D, where

A & B are reactants, and C & D are products.

As the rates are equal in equilibrium state, so the concentration of reactant and product also have constant value as there is no change in the rate.

Hence, option (B) is correct i.e. concentrations of the reactants and products have reached constant values.

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Answer:

The elements in Group 1 (lithium, sodium, potassium, rubidium, cesium, and francium) are called the alkali metals. All of the alkali metals have a single s electron in their outermost principal energy. ... For example, the electron configuration of lithium (Li), the alkali metal of Period 2, is 1s22s1.

Answer:

they have a mono positive charge of +1

Explanation:

this is due to having one electron in their outermost ns orbital

Answer:

There are 23076 peanut M&M's in 53.768 kg of M&M's.

Explanation:

First we convert 53.768 kg into g:

Then we divide the total mass of M&M's by the mass of one peanut M&M, in order to calculate the answer:

So there are 23076 peanut M&M's in 53.768 kg of M&M's.

Answer:

d

Explanation:

wave a and b clashing constructively would make c a bigger wave and clashing destructively would make d a smaller wave, which they are.

Answer:

d

Explanation:

Answer:

MgBr2

Explanation:

(Mg^2+) + (Br^1-)

For every Mg we need 2 Br to balance out the compound.

Since magnesium has two outer electrons, it can donate one electron each to two bromine atoms having seven outer electrons in order for each of the atoms to have a complete octet.

Since the octet rule states that a stable atom must have eight electrons in its outermost shell, it follows that magnesium could give out two of its outermost electrons to two bromine atoms.

When that happens, each bromine atom which previously had seven electrons now have eight electrons, satisfying the octet rule. The correct formula of the compound is MgBr2.

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Answer:

Copper is typically a solid and has a coppery, bronzy color. It is a metal and has a relatively high melting point. It has a strong luster and can conduct electricity.

Answer:

RESHAPE BY A FORCE.

Explanation:

1. It can be reshaped by a force. Physical property can be observed and measured without any changes in molecular composition.

2. A physical property is one that can be change without altering the identity of the substance. These set of properties is not concentration dependent they are use to describe matter. Example are: density, solubility, melting point and color and odor. For this case the second option seems to fit the description it can be reshape by force.

Answer:

K, or Potassium

Explanation:

Answer:

The color black absorbs most colors, while white reflects most colors.

Answer:

n=V/Vm

n=1/22.4

n=0.044 moles He

m=n×M

m=0.044×4

m=0.178 g False

Answer:

179g

Explanation:

Molar ratio for Copper : Lithium is

1:2

If there are 89.5g of copper

Grams for Lithium= 89.5 × 2 = 179g of Lithium

The amount of lithium are formed from the reaction if you begin with 89.5 grams of copper is 19.6 grams.

Mass can be converted into moles by using the below equation as:

n = W/M, where

W = given mass

M = molar mass

Moles of 89.5g of copper = 89.5g / 63.5g/mol = 1.4 mol

Given chemical reaction is:

Cu + Li₂S → 2Li + CuS

From the stoichiometry of the reaction, it is clear that

1.4 mole of Cu = produces 1.4 mole of CuS

1.4 mole of CuS = produced by 1.4 mole of Li₂S

1.4 mole of Li₂S = produces 2×1.4=2.8 moles of Li

Mass of 2.8 moles of Li = (2.8mol)(7g/mol) = 19.6g

Hence resultant mass of lithium is 19.6g.

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Answer:

0.525 M

Explanation:

As the problem deals with a dilution process, we can use the following formula:

Where subscript 1 stands for initial concentration and volume, while 2 stands for the final conditions. Meaning that in this case:

We input the data given by the problem:

And solve for C₂: