3 years ago

A concrete barrier in a parking lot a structure of mass, frame, or shell? Which one would it be?

Chemistry

1 answer:

slavikrds [6]3 years ago

8 0

Thinking frame not 100% sure

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Brainiest plsss helpp

svlad2 [7]

Answer:

$\boxed {\boxed {\sf A. \ 19,320 \ kg/m^3}}$

Explanation:

We want to find the density. The formula is mass over volume.

$\rho = \frac{m}{v}$

The mass is 500 kilograms. The volume is 0.026 cubic meters.

$m= 500 \ kg \\v=0.026 \ m^3$

Substitute the values into the formula.

$\rho= \frac{ 500 \ kg}{ 0.026 \ m^3}$

Divide.

$\rho = 19230.7692 \ kg/m^3$

This is just about equal to 19,320 kg/m³, so choice A is correct.

3 0

3 years ago

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Why are there different types of matter.

kiruha [24]

Answer:

solid ; liquid and gas........

7 0

3 years ago

How many moles of LiOH are needed to react completely with 25.5 g of CO2

LekaFEV [45]

Answer:

3.18 mol

Explanation:

$2LiOH+CO_{2}-> Li_{2}CO_{3} +H_{2}O$

n(CO2) = mass/ Mr.

= 25.5 / 16

= 1.59 mol

As per the equation above,

n(LiOH) : n(CO2)

2 : 1

∴ 3.18 : 1.59

3 0

3 years ago

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neonofarm [45]

Answer:

Imao ;/

Explanation:

5 0

3 years ago

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18. What is the percent by mass sugar of a solution made by dissolving 12.45 grams of sugar in 100 grams of water?

Fantom [35]

The percent by mass sugar of a solution : 11.07%

<h3>Further explanation</h3>

Given

mass of sugar = 12.45 g

mass of water = 100 g

Required

The percent by mass

Solution

Mass of solution :

$\tt mass~sugar+mass~water=12.45+100=112.45~g$

Percent mass of sugar :

$\tt \%mass=\dfrac{mass~sugar}{mass~solution}\times 100\%\\\\\%mass=\dfrac{12.45}{112.45}\times 100\%=11.07\%$

6 0

3 years ago