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4 years ago

PLS HURYYY ILL GIVE BRAINLIEST

Chemistry

1 answer:

ad-work [718]4 years ago

5 0

The volume increases when the balloon temperature increases.

<u>Explanation:</u>

-10 F is converted into Kelvin as 249 K.

0°C is nothing but 0+ 273 = 273 K

And the room temperature is 25°C which is converted into Kelvin as 273 + 25 = 298 K.

249 K is below room temperature.

As per the Charles' law volume and temperature are directly proportional to each other, when the pressure of the gas remains constant.

V ∝ T

As the balloon temperature increases, the volume also increases.

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5. In an oxyacetylene welding torch, acetylene (C2H2) burns in pure oxygen with a very hot flame. The reaction is: 2 C2H2 + 5 O2

gulaghasi [49]

11.375 g ethylene is consumed if 35.0 grams of oxygen is allowed to react and 7.875 ml of water will be produced when the 35.0 grams of oxygen is allowed to react.

<h3>What are moles?</h3>

A mole is defined as 6.02214076 × $10^{23}$ of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

According to the chemical equation for the combustion of ethylene, 5

moles of oxygen are required to react with 2 moles of ethylene, hence

$m_{_C_2_H_2}$ $= 35gX \frac{1 mol}{(2 \;X\; 16)g } X \frac{2 mol}{(5\;mol )} X \frac{26g}{1 mol }$

$m_{_C_2_H_2} = 11.375 g$

Similarly, 5 moles of oxygen are required as a reactant to produce 2 moles of water, thus

$m_{_H_2_O} = 35gX \frac{1 mol}{(2 \;X\; 16)g } X \frac{2 mol}{(5\;mol )} X \frac{18g}{1 mol }$

$m_{_H_2_O} = 7.875 g$

Given that the density of water is $1.0g ml^{-1}$ , therefore

$Density = \frac{Mass \;of \;water}{Volume \;of \;water}$

$Volume \;of \;water = \frac{7.875}{1.0 g ml^{-1}}$

The volume of water = 7.875 ml

Learn more about moles here:

brainly.com/question/8455949

#SPJ1

5 0

2 years ago

Read 2 more answers

Can somebody plz help answer both these 2 questions ONLY 1-2 sentences if good! thanks :]

Gekata [30.6K]

I already answered number one, so I'll do number two. A turbine is a machine that spins in order to create energy or electricity, in some cases. The turbine collects the wind and it flows throughout the body of the turbine, where the machine then forms it into electricity.

6 0

3 years ago

Read 2 more answers

If 0.380 mol of barium nitrate is allowed to react with an excess of phosphoric acid, how many moles of barium phosphate could b

Vladimir [108]

If 0.380 mol of barium nitrate is allowed to react with an excess of phosphoric acid, 0.127 moles of barium phosphate could be formed.

<h3>How to calculate number of moles?</h3>

The number of moles of a compound can be calculated stoichiometrically as follows:

Based on this question, the following chemical equation is given:

Ba (NO3)2+ H3PO4 → Ba3(PO4)2+ HNO3

The balanced equation is as follows:

3Ba(NO3)2 + 2H3PO4 → Ba3(PO4)2 + 6HNO3

3 moles of barium nitrate produces 1 mole of barium phosphate

Therefore, 0.380 moles of barium nitrate will produce 0.380/3 = 0.127moles of barium phosphate.

Learn more about stoichiometry at: brainly.com/question/9743981

7 0

2 years ago

1.25 is the closest to 1.04 or not I want to answer please. I think it's true, but I want to prove it scientifically, please.

PSYCHO15rus [73]

Answer:

false because if you round both of them

3 0

3 years ago

Answer:

Vlada [557]

Answer:Number of proton present in the nucleus of an atom of sulfur is 16.

Explanation:

Protons, neutrons and electrons are subatomic particles of an atom.

Atomic number of an atom is equal to the total number of protons present in the nucleus of an atom.

Z = total number of protons

Atomic mass of an atom is defined as sum of the number of protons and neutrons present in the nucleus of an atom.

In neutral atom there are equal number of protons and electron.

A = number of proton + number of neutrons

According to question, there are 16 electrons in neutral atom of Sulfur.

in a neutral atom:

Number of electrons = Number of protons = 16

Number of proton present in the nucleus of an atom of sulfur is 16.

7 0

3 years ago