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olya-2409 [2.1K]
3 years ago
8

Dose PLA Plastic float?

Chemistry
1 answer:
padilas [110]3 years ago
7 0

Answer:

No, it should sink

Explanation:

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Help please fast as possible I’ll mark you brainlist
Sergeeva-Olga [200]

Answer:

As mass increases the gravitational force increases

Explanation:

Things with mass gain a gravitational force, The bigger they are the more force, for example: the sun is the biggest so it pull us

7 0
3 years ago
What is radius? When might you need to measure an object’s radius?
katrin2010 [14]
It’s halfway into the circle, you would need it when trying to find the circumference
3 0
3 years ago
Oxygen gas is collected at a pressure of 1.21 atm in a container which has a volume of 10.0 L. What temperature (in Kelvin) must
stiv31 [10]

Answer : The temperature of gas is, 295 K

Explanation :

To calculate the temperature of gas we are using ideal gas equation:

PV=nRT

where,

P = Pressure of gas = 1.21 atm

V = Volume of gas = 10.0 L

n = number of moles = 0.500 mole

R = Gas constant = 0.0821L.atm/mol.K

T = Temperature of gas = ?

Now put all the given values in above equation, we get:

1.21atm\times 10.0L=0.500mole\times (0.0821L.atm/mol.K)\times T

T=294.8Kapprox 295K

Therefore, the temperature of gas is, 295 K

5 0
3 years ago
How to tell if a compound is ionic or molecular?
zhenek [66]
<span>When naming compounds, the first thing you need to do is decide if the compound is ionic or molecular. *Ionic compounds will contain both metals and non-metals, or at least one polyatomic ion. *Acids will always include the (aq) symbol beside the formula, and the name will include the word acid.</span>
5 0
4 years ago
Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. Th
Zarrin [17]

Answer: 136 g of  NaN_3 must be reacted to inflate an air bag to 70.6 L at STP.

Explanation:

Using ideal gas equation:

PV=nRT

P= pressure of nitrogen gas = 1 atm (at STP)

V =volume of nitrogen gas = 70.6 L

n = number of moles of nitrogen gas = 1 atm (at STP)

R = gas constant = 0.0821 Latm/Kmol

T = temperature of nitrogen gas = 273 K (at STP)

1atm\times 70.6L=n\times 0.0821 L atm/K mol\times 273

n=3.14

For the balanced chemical reaction:

2NaN_3(s)\rightarrow 2Na(s)+3N_2(g)

3 moles of nitrogen are produced by = 2 moles of NaN_3

3.14 moles of nitrogen are produced by =\frac{2}{3}\times 3.14=2.09 moles of NaN_3

Mass of NaN_3 = Moles × Molar mass = 2.09 mole × 65 g/mol = 136 g

7 0
4 years ago
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