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jonny [76]
3 years ago
12

PLEASE HELP ASAP!!!

Chemistry
2 answers:
gavmur [86]3 years ago
5 0

Answer:

A

Explanation:

garik1379 [7]3 years ago
5 0

Answer:

The correct answer is: A. The toy car will speed up.

Explanation:

I took this test

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An increase in blood co2 levels leads to __________.
tatiyna

Answer:

Respiratory Acidosis

Explanation:

4 0
3 years ago
How many grams of CH4 will be in a 500ml contain at STP?
ArbitrLikvidat [17]

Answer:

Mass = 0.32 g

Explanation:

Given data:

Mass of CH₄ = ?

Volume of CH₄ = 500 mL (500 mL× 1L/1000 mL= 0.5 L)

Temperature = 273 K

Pressure = 1 atm

Solution:

Volume of CH₄:

500 mL (500 mL× 1L/1000 mL= 0.5 L)

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

By putting values,

1 atm× 0.5 L = n×0.0821 atm.L/ mol.K  × 273 K

0.5 atm.L = n×22.4 atm.L/ mol

n = 0.5 atm.L / 22.4 atm.L/ mol

n = 0.02 mol

Mass in gram:

Mass = number of moles × molar mass

Mass = 0.02 mol × 16 g/mol

Mass = 0.32 g

7 0
3 years ago
Student uses a magnet to move 0.0 25 KG metal box the magnet exerts a force of 5N which causes the ball to begin moving what is
daser333 [38]

Answer: 200 m/s2

Explanation:

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3 years ago
Why are iron needles used in compasses
ludmilkaskok [199]

A compass needle points north because the north pole of the magnet inside it is attracted to the south pole of Earth's built-in magnet . <u><em>And irons are heavily attracked to magnet</em></u> .So this is why iron needles used in compasses .

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2 years ago
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The lungs. it travels to the lungs
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