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3 years ago

A gas is enclosed in a cylinder fitted with a piston. The volume of the gas is 5.00 L at 0.500

Chemistry

1 answer:

Snowcat [4.5K]3 years ago

6 0

Answer:

0.8333 L. P1v1=p2v2

Explanation:

I dont now if this is wht you were looking for so srry

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According to the Big Bang Theory, the Universe is expanding. Galaxies are constantly shifting away from one another at different

vivado [14]

According to the Big Bang Theory, the Universe is expanding, hence option A is correct

<h3>What is the Big Bang theory?</h3>

Big Bang Theory is a theory about the origin and the nature of the universe and the earth we live in.

According to the theory, the universe started at an energized tiny point and exploded with a great force.

Learn more about the Big Bang Theory here:

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2 years ago

Which of the following would you expect to have

IRISSAK [1]

Explanation:

number b is the answer for the question

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3 years ago

A titration is performed on a 25.0 mL sample of calcium hydroxide. A volume of

slamgirl [31]

Answer:

$\boxed {\boxed {\sf 0.28 \ M}}$

Explanation:

Titration is a method used to determine the concentration of a substance. The formula for this is:

$M_AV_A= M_BV_B$

Where M is the molarity of the acid or base and V is the volume of the acid or base.

We know that 46.0 milliliters of a 0.15 molar solution of nitric acid wereused in the titration. 25.0 milliliters of solution of calcium hydroxide of unknown molarity were also used.

$\bullet \ M_A= 0.15 \ M \\\bullet \ V_A= 46.0 \ mL\\\bullet \ V_B= 25.0 \ mL$

Substitute these known values into the formula.

$0.15 \ M * 46.0 \ mL= M_B * 25.0 \ mL$

We are solving for the molarity of the base, so we must isolate the variable $M_B$ . It is being multiplied by 25.0 milliliters. The inverse operation of multiplication is division, so we divide both sides of the equation by 25.0 mL.

$\frac {0.15 \ M * 46.0 \ mL}{25.0 \ mL}= \frac{M_B * 25.0 \ mL}{25.0 \ mL}$

$\frac {0.15 \ M * 46.0 \ mL}{25.0 \ mL}= M_B$

The units of milliliters (mL) cancel.

$\frac {0.15 \ M * 46.0 }{25.0}=M_B$

$\frac {6.9}{25.0 } \ M =M_B$

$0.276 \ M = M_B$

The original measurements have 2 or 3 significant figures. We always round our answer to the least number of sig figs, which is 2. For the number we calculated, that is the hundredths place. The 6 in the thousandths place tells us to round the 7 up to an 8.

$0.28 \ M \approx M_B$

The concentration of calcium hydroxide is approximately <u>0.28 M.</u>

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3 years ago

A moss begins to grow on a rock in an area that was previously uninhabited by life. This is an example of what??

Stels [109]

Answer: Primary succession

Explanation: The primary succession takes place at the places where the fungi, lichen and pioneer species grow on the substrate other than soil.

The moss and other plants starts growing when there is a suitable condition for their growth.

The place like rock and volcanic ashes are not fertile as soil for the growth of plants so when there is a growth of moss on the rock for the first time known as Primary Succession.

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3 years ago

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Selena breaks a piece off the end of a stick she found and notes that’s a physical change has occurred which of the following pr

babunello [35]

The shape and size of the stick has changed after breaking it

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3 years ago