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4 years ago

True or False: The atmosphere is the collection of gases surrounding the earth trapped by earth's gravity.

Chemistry

1 answer:

Vladimir79 [104]4 years ago

4 0

Answer:

I think its False

Explanation:

ozone layer surroundes the atmosphere and traps the heat

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The weight of an object is the product of its mass, m, and the acceleration of gravity, g (where g=9.8 m/s2). If an object’s mas

Amiraneli [1.4K]

Weight = mass x gravitational acceleration = mg

m = 10kg
g = 9.8 m/s^2

So, weight = 10 x 9.8 = $98 Kg-m/s^2$

5 0

4 years ago

Read 2 more answers

Calculate the amount of energy when water at 72 degrees c freezes completely at 0 degrees c

gtnhenbr [62]

Answer:

The amount of energy needed when water at 72 degrees c freezes completely at 0 degrees c is $6.37\times10^4$ Joules

Explanation:

$Q = m \times c \times \Delta T$

where

$\Delta T$ = Final T - Initial T

$Q_{1}=100 g \times 4.184 \frac{J}{g^{\circ} \mathrm{C}} \times\left(72^{\circ} \mathrm{C}-0^{\circ} \mathrm{C}\right)$

$Q_1$ =30125J

Q is the heat energy in Joules

c is the specific heat capacity (for water 1.0 cal/(g℃)) or 4.184 J/(g℃)

m is the mass of water

mass of water is assumed as 100 g (since not mentioned)

$Q_2$ is the heat energy required for the phase change

$Q_2$ =mass × heat of fusion

$\\$Q_{2}=100 g \times 336 \frac{J}{g}$\\\\$Q_{2}=33600 J$$

Total heat = $Q_1 + Q_2$

Total Heat = 30123J + 33600J

= 63725 J

= $6.37\times10^4$ Joules is the answer

3 0

3 years ago

What is one advantage the United States has over Canada for maintaining a diversified economy?

r-ruslan [8.4K]

Answer: The U.S. has a greater gold resource

Explanation: Canada has 3,500 tons while the U.S. has 6,000

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3 years ago

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How does flame spread over liquid depend on the flash point?

zvonat [6]

If the liquid is at or above its flash point, the flame spread rate is fast, and the entire pool is engulfed within seconds. ... As the liquid temperature decreases, flame radiation must both heat the liquid to the flash point temperature and supply the heat of vaporization.

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4 years ago

a 20ml sample of hcl was titrated with the 0.0220 M Naoh. to reach the endpoint required 23.72 mL of the NaOh. Calculate the mol

Y_Kistochka [10]

Answer:

Molarity of HCl=0.026092M

Explanation:

The equation for the reaction is;

HCl + NaOH ⇒ NaCl + H2O

Using the formular, $\frac{C_{A}V_{A}}{C_{B}V_{B} }=\frac{nA}{nB}$ ..........equ1