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3 years ago

7

A compound whose molecules contain one boron atom and three fluorine atoms would be named monoboron fluoride. Please select the

best answer from the choices provided T F

1 answer:

Slav-nsk [51]3 years ago

5 0

I know it is false...............

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If the specific gravity of copper is 8.91, it weighs:

denis-greek [22]

Answer:

Option D is the correct answer.

Explanation:

The specific gravity of copper is 8.91.

We have

$\frac{\texttt{Density of copper}}{\texttt{Density of water}}=8.91\\\\\texttt{Density of copper}=8.91\times 1000kg/m^3=8910kg/m^3$

We also have

1 kg = 2.205 lb

1 m = 3.28 ft

Substituting

$\texttt{Density of copper}=8910kg/m^3=\frac{8910\times 2.205}{3.28^3}=556.76lb/ft^3$

Option D is the correct answer.

6 0

3 years ago

Explain how metallic atoms bond to form metallic compounds.

xz_007 [3.2K]

In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions

4 0

3 years ago

Read 2 more answers

from the edge of the rooftop of a building, a boy thros a stone at an angle of 25 above the horizontal. The stone hits the groun

ella [17]

Answer:38.675 m/s

Explanation:

$\theta =25^{\circ}$

t=4.2 s

$R_x=105m$

Solving in x direction

$R_x=ut+\frac{1}{2}\left ( 0\right )t^2$

$105=ucos25\times 4.2$

ucos25=25

u=27.584 m/s

Initial velocity in vertical direction usin25

Let h be the height of Rooftop

$h=\left ( -usin25\right )4.2+\frac{1}{2} \left ( 9.8\right )\left ( 4.2\right )^2$

h=37.47 m

Therefore final vertical velocity is $v_{vf}^2-\left ( usin25\right )^2=2\times 9.81\times 37.47$

$v_{vf}$ =29.51 m/s

Final Resultant velocity

$V_{final}=\sqrt{29.51^2+24.99^2}$

$V_{final}=38.675 m/s$

6 0

4 years ago

which of the following stars has the highest surface temperature? A. red star B. blue star c. yellow star D. orange star

Hoochie [10]

B. blue star has the highest surface temperature

8 0

3 years ago

Read 2 more answers

4.The equation for Kinetic Energy is 1/2 x m x v2. Calculate the KE when the mass is 5 kg and the velocity is 4 m/s.

Dovator [93]

Explanation:

KE = ½mv²

= ½ × 5 × 4²

= ½ × 5 × 16

= ½ × 80

= 40 J

7 0

3 years ago