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Maru [420]
4 years ago
10

1.Calculate the end velocity of a rocket that traveled 16km in 2 seconds.

Chemistry
1 answer:
fomenos4 years ago
8 0

Answer:

1}800m/s

2}80m/s²

Explanation:

1]first convert the kilometers to meters so as to obtain similar units;

16×1000=16000m   (1Km=1000m)

then divide the ditance by time:

speed=distance/time  

=16000m/2s

=800m/s

2]acceleration=(initial velocity -final velocity)/time taken

=(800m/s-0m/s)/10s

=800m/s/10s

=80m/s²

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Which variable increases when potential energy increases?
beks73 [17]

Answer:

Height and mass

Explanation:

The potential energy of a body is the energy due to the position of a body.

It is mathematically expressed as:

 Potential energy  = m g h

m is the mass of the body

g is the acceleration due to gravity

h is the height of the body

Acceleration due to gravity on the earth surface is a constant.

As mass and height of a body increases, the acceleration due to gravity will also increase.

3 0
3 years ago
A) find out from the electron configurations in the picture what element preferably makes a compound with Na.
irakobra [83]
A) Picture D

B) Chlorine

C) Natrium chloride (NaCl) / salt
5 0
3 years ago
The volume of a gas is increased from 0.5 L to 4.0 L while the temperature is held constant. The pressure of the gas will go fro
AVprozaik [17]
From Boyle's law the volume of a fixed mass of a gas is inversely proportional to the pressure at a constant absolute temperature. Thus; K = PV                          Hence; P1V1 =P2V2                                                                                                      0.5 × 24 = 4× P2                                                                                                      P2 = 12/4 = 3 atm                                                                                      Therefore; the pressure will go from 24 atm to 3 atm
6 0
3 years ago
I need help fast thx
Free_Kalibri [48]
I'm guessing you have to balance these.
I took a picture of my working out.

Answer to the first one = 2HCl+CaCO3=CaCl2+H20+CO2
So basically just add a big 2 in front of the first HCl

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So basically in this one just add a big 2 in front of both of the Ni

6 0
4 years ago
What mass of N2 will be needed to produce 31.5 grams of N2O5?
SCORPION-xisa [38]

Answer: d) 16.34 grams

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}  

\text{Moles of} N_2O_5=\frac{31.5g}{108.01g/mol}=0.292moles

4N_2+5O_2\rightarrow 2N_2O_5  

According to stoichiometry :

As 2 moles of N_2O_5 are produced by= 4 moles of N_2

Thus 0.292 moles of N_2O_5 are produced by=  =\frac{4}{2}\times 0.292=0.584moles of N_2

Mass of N_2=moles\times {\text {Molar mass}}=0.584moles\times 28g/mol=16.34g

Thus 16.34 g of N_2 will be needed

6 0
3 years ago
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