CHEMISTRY HIGH SCHOOL

Can someone show me a step by step with the answer?

Answers

Answer 1

Answer:

Answer:

6 mols HCl

Explanation:

(I'm an AP chemistry student but not perfect at this stuff)

you can use the Molarity=Moles/L equation here:

(6M)=(moles HCl)/(1L)

divide by 1 on both sides to isolate the moles of HCl

this gets you 6 moles HCl.

Again I'm just a student so my answer might be wrong, but this question should just require the M=mols/L equation :).

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How many grams of O2(g) are needed to completely burn 73.7 g of C3H8(g)?

Answers

The balanced reaction is:

C3H8 + 5O2 = 3CO2 + 4H2O

We are given the amount of C3H8 to be reacted with O2. This will be the starting point of the calculations.

73.7 g C3H8 ( 1 mol C3H8/ 44.1 g C3H8 ) ( 5 mol O2 / 1 mol C3H8 ) ( 32.0 g O2 / 1 mol O2 ) = 267.39 g O2

Answer: 267.2 grams

Explanation:

$C_3H_8+5O_2\rightarrow 3CO_2+4H_2O$

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

$\text{Number of moles of propane}=(73.7g)/(44.1g/mol)=1.67moles$

According to stoichiometry:

1 mole of $C_3H_8$ require 5 moles of $O_2$

Thus 1.67 moles of $C_3H_8$ will require = $(5)/(1)* 1.67=8.35moles$ of $O_2$

Mass of $O_2=moles* {\text {Molar mass}}=8.35moles* 32g/mol=267.2$

Thus 267.2 grams of oxygen are required.

How to balance the redox reation : H2S+O2--> H2O+SO2

Answers

2(H2S) + 3(O2) --> 2(H2O) + 2(SO2)

Scientists use results from new experiments to

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Answer:

The scientists use results from the new experiments to change the existing explanations of how nature functions. The world is changing continuously. There are outcomes, which have been obtained from the scientific studies performed earlier, which may no longer be accurate at present because of certain factors that may not have been discovered or present in those times. Other scientific findings may also be further acknowledged as true from the outcomes of the new experiments.

Final answer:

Scientists use results from new experiments to validate or refute existing theories and to explore new scientific territory. This is done by gathering and analyzing data from these experiments, ultimately leading to more informed and detailed theories.

Explanation:

Scientists use results from new experiments to both confirm existing theories and explore new territories of knowledge. Conducting an experiment helps scientists gather data and observations. These results then provide evidence that either supports or refutes a hypothesis, leading to more advanced and precise scientific theories. For example, when Albert Einstein proposed his theory of relativity, further experiments such as the Eddington experiment during a solar eclipse provided data evidence that supported his theory.

Learn more about Scientific Experiment here:

brainly.com/question/36452589

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What happens to the average kinetic energy of the water molecules in your body when you have a fever?

Answers

When you have a fever, the average kinetic energy of the water molecules in your body increases because the molecule's speed increases.

What is kinetic energy?

In physics, kinetic energy is the energy that an object has as a result of motion. It is defined as the amount of effort required to move a mass-determined body from rest to the specified velocity.

Unless the body's speedchanges, the kinetic energy gained during acceleration is retained.

Kinetic energy is the energy that an object has as a result of motion. To accelerate an object, a force must be applied to it.

We must exert effort in order to use force. When the work is completed, energy is transferred to the item, which moves at a new, constant speed.

To learn more kinetic energy, refer to:

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the speed of the molecule increses

Which statement compares the masses of two subatomic particles?(1) The mass of an electron is greater than the mass of a proton.
(2) The mass of an electron is greater than the mass of a neutron.
(3) The mass of a proton is greater than the mass of an electron.
(4) The mass of a proton is greater than the mass of a neutron.

Answers

atoms are made of 3 types of subatomic particles - electrons, protons and neutrons

mass of proton is 1 atomic mass unit and proton is also 1 atomic mass unit

masses of protons and neutrons are very similar

mass of an electron is 1/1840th of 1 atomic mass unit

mass of electron is insignificant when compared to masses of neutrons and protons

protons and neutrons have a larger mass than electrons

from the given options correct answer is

(3) The mass of a proton is greater than the mass of an electron

Electrons have mass 0
Protons have mass 1
Neutrons have mass 1

(1) 0 is not greater than 1
(2) 0 is not greater than 1
(3) 1 is greater than 0
(4) 1 is not greater than 1

So the answer is (3) The mass of a proton is greater than the mass of an electron

What is the name of P3N6?

Answers

Answer:

p and n

Explanation:

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Dinitrogen trisulfide symbol