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3 years ago

Use the information to answer the following question.

Chemistry

2 answers:

d1i1m1o1n [39]3 years ago

6 0

Answer: D

Explanation:

jolli1 [7]3 years ago

4 0

I think the answer is c

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A car with a mass of 3,500lbs accelerates negatively from 35m/s to 8m/s in 8s. What is the

Salsk061 [2.6K]

Answer:

$a=-3.37\ m/s^2$

Explanation:

Given that,

A car accelerates negatively from 35m/s to 8m/s in 8s.

We need to find the car's acceleration.

Initial speed, u = 35 m/s

Final speed, v = 8 m/s

Time, t = 8 s

The acceleration of an object is equal to the rate of change of velocity. So,

$a=\dfrac{v-u}{t}$

Put all the values,

$a=\dfrac{8-35}{8}\\\\a=-3.37\ m/s^2$

So, the acceleration of the car is equal to $-3.37\ m/s^2$ .

8 0

3 years ago

Which type of bond will most likely be found in HBr?

NARA [144]

HBr is covalent bond.!

Hydrogen and Bromine will share their electrons, to obtain the electron configuration of a noble gas.

hope this helps!

6 0

3 years ago

Read 2 more answers

What is the pOH of a 7.9 x 10(-4)m OH- solution?

aleksley [76]

POH is defined as -log([OH-])

pOH = -log([OH-]) = -log(7.9 x 10^-4) = 3.1

Hope that helps! :)

6 0

3 years ago

The diagram and data below represent gas and the conditions of pressure, volume, and temperature of the gas in a rigid cylinder

Sedaia [141]

Answer:

2.3 L

Explanation:

when you have this eqaution you use P1V1T2=P2V2T1.

since you are looking for volume of gas cylinder that means you are looking for V2.

so you have your given P= 1.0 atm, V=2.5L, T=298K.

They ask you to use STP or standard pressure and temperature.

STP P= 1atm, STP T=273 K

so you are looking for V2 meaning you are going to get V alone so your new equation is P1*V1*TS/ P2* T1= V2

so you now substitue so its now 1*273*2.5/ 1* 298= V

682.5/ 298= V

Lastly V= 2.2902 and you round to tenths so now you have

V= 2.3 L

5 0

3 years ago

The concentration of a biomolecule insdie a rod-shaped prokaryotic cell is 0.0051 M. Calculate the number of molecule inside the

Ann [662]

Answer: The number of molecules inside the cell are $2.2\times 10^6$

Explanation:

We are given a prokaryotic cell, which is in the shape of rod or cylinder.

The equation used to calculate the volume of cylinder is:

$V=\pi r^2h$

where,

V = volume of cell = ?

r = radius of the celle = $\frac{d}{2}=\frac{1.7\mu m}{2}=0.85\mu m=8.5\times 10^{-7}m$ (Conversion factor: $1m=10^6\mu m$ )

h = length of the cell = $3.1\mu m=3.1\times 10^{-6}m$

Putting values in above equation, we get:

$V=(3.14)\times (8.5\times 10^{-7})^2\times 3.1\times 10^{-6}\\\\V=7.033\times 10^{-18}m^3$

To calculate the number of moles for given molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

Molarity of biomolecule = 0.0051 M

Volume of solution = $7.033\times 10^{-18}m^3=7.033\times 10^{-15}L$ (Conversion factor: $1m^3=1000L$ )

Putting values in above equation, we get:

$0.0051M=\frac{\text{Moles of biomoleculel}}{7.033\times 10^{-15}L}\\\\\text{Moles of biomolecule}=(0.0051mol/L\times 7.033\times 10^{-15}L)=3.59\times 10^{-17}mol$

According to mole concept:

1 mole of a compound contains $6.022\times 10^{23}$ number of molecules

So, $3.59\times 10^{-17}$ moles of a biomolecule will contain = $(3.59\times 10^{-17}\times 6.022\times 10^{23}=2.2\times 10^6$ number of molecules

Hence, the number of molecules inside the cell are $2.2\times 10^6$

5 0

3 years ago