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2 years ago

3. What is the substance ozone?

1 answer:

8 0

Chlorofluorocarbons and other halogenated ozone depleting substances are mainly responsible for man made chemical ozone depletion.

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Calculate the kilojoules needed to heat 231 g of gold from 18 ∘C to 195 ∘C.

LuckyWell [14K]

5.27 kJ of heat are required to heat 231 g of gold from 18 °C to 195 °C.

We have 231 g of gold at 18 °C and supply it with heat to increase its temperature to 195 °C. We can calculate the amount of heat required using the following expression.

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

where,

Q: heat

<em>c: specific heat capacity of gold</em> (0.129 J/g.°C)

m: mass

ΔT: change in the temperature

$Q = \frac{0.129 J}{g.\° C} \times 231 g \times (195 \° C - 18 \° C) = 5.27 \times 10^{3} J = 5.27 kJ$

5.27 kJ of heat are required to heat 231 g of gold from 18 °C to 195 °C.

You can learn more about heating here: brainly.com/question/1105305

8 0

2 years ago

The number of moles in 4.27×10^22 particles of silver is

bazaltina [42]

Answer:

$mol=0.0709mol$

Explanation:

Hello,

In this since one mole equals 6.022x10²³ particles of silver by means of the Avogadro's number, we can compute the moles in 4.27x10²² particles as shown below:

$mol=4.27x10^{22}particles*\frac{1mol}{6.022x10^{23}particles}\\\\mol=0.0709mol$

Best regards.

3 0

2 years ago

What is the volume occupied by 6.0 moles of carbon dioxide gas at standard conditions of temperature and pressure

aliina [53]

Answer: 134.4 L

Explanation:

it just is

3 0

3 years ago

Which type of reaction occurs when 50mL quantities of 1 M Ba(OH)2 (aq) and H2SO4 (aq) are combined

iragen [17]

Double replacement.

Ba(OH)2 + H2SO4 ====> 2H2O + BaSO4

5 0

3 years ago

HELP!! Please (: I can’t figure out the answers

MrRa [10]

I believe I know the answer to #4
ANSWER: Two moles to a first approximation
*Disclaimer* I'm pretty sure I'm right, but I could be wrong

5 0

3 years ago