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3 years ago

To show what he learned about the properties of volume for solids, liquids and gases, Viktor wrote the following summary.

1 answer:

7 0

The wrong statement in Viktor's summary is When a round solid ball is placed in a box, the ball takes the shape of the box

The matter has three main states which are

Solid
Liquid
Gas

These states define the way we interact and manipulate materials. For instance:

Liquids take the shape of the container that contains them. For example water, milk, soda, among others.

Solids have a defined shape and do not deform when manipulated or placed inside another container. For example, a round solid ball.

Gases generally do not have colors and their atoms are not organized so they do not have a definite shape and take the shape of their container. For example, the air in a balloon.

According to the above, the error in Viktor's summary is in the first phase, and the correct statement is A. because solids does not take the shape of its container.

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How does sin 30degrees compare to sin -30degrees?

KiRa [710]

The sine function is an odd function, so the sine of -30° is the opposite of the sine of 30°.

sin(30°) = 1/2

sin(-30°) = -1/2

The sine of 30° is greater than the sine of -30°.

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3 years ago

A mixture of compounds X and Y in a 0.100-cm cell had an absorbance of 0.215 at 272 nm and 0.191 at 327 nm. Find [X] and [Y] in

Oksi-84 [34.3K]

Answer: The concentration of X is $7.13582\times 10^{-6}$ and the concentration of Y is $2.53159\times 10^{-5}$ .

Step-by-step explanation:

Since we have given that

At 272 nm, absorbance = 0.215

At 327 nm, absorbance = 0.191

As we have given that

Compound X Compound Y

272 16400 3870

327 3990 6420

So, our equations becomes

$16400C_1+3870c_2=0.215\\\\3990C_1+6420C_2=0.191$

By solving these two equations, we get that

$C_1=7.13582\times 10^{-6}\\\\C_2=2.53159\times 10^{-5}$

Hence, the concentration of X is $7.13582\times 10^{-6}$ and the concentration of Y is $2.53159\times 10^{-5}$ .

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3 years ago

HELP SOMEONE PLEASE!!!!! Factor completely 10x2 + 2x − 8. 2

natka813 [3]

Answer:

2(5x - 4)(x + 1)

Step-by-step explanation:

10x^2 + 2x − 8 =

First, factor out the GCF of all terms which is 2.

= 2(5x^2 + x - 4)

5x^2 factors into 5x and x.

= 2(5x )(x )

-4 factors into -4 and 1, -1 and 4, and -2 and 2. Use the set of two factors in the proper positions that will give the middle term.

= 2(5x - 4)(x + 1)

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3 years ago

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How do you do expanded form in three ways to the number 37,917,545

fomenos

You can't write expanded form in three ways, but you can write that number in expanded form AND two other ways, one you just listed.

Word: thirty seven thousand, nine hundred seventeen thousand, five hundred forty five

Expanded: 30,000,000 + 7,000,000 + 900,000, 10,000 + 7,000 + 500 + 40 + 5

Standard: 37,917,545

8 0

3 years ago

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finlep [7]

Answer:

Step-by-step explanation:

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3 years ago