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2 years ago

Which of the following is an example of climate?

Chemistry

1 answer:

makkiz [27]2 years ago

4 0

The first one is correct.

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Classify each of the following processes as spontaneous or nonspontaneous

Brilliant_brown [7]

What are the processes we are supposed to be classifying?

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3 years ago

How many seconds are in an exactly 40-hour work week?

Elza [17]

7 days = 1 week 60 seconds = 1 minute.
40 hr 60 min 60 sec = 144,000 s.
The answer is 144,000 seconds hopes this helps :)

4 0

3 years ago

Read 2 more answers

Examine the reaction.

makkiz [27]

A

Explanation: hydrogen has a charge of 1 and oxygen has a charge of -2, so you will need 2 hydrogens to balance out the oxygen

3 0

3 years ago

PLEASE HELP. WILL MARK BRAINLIEST SERIOUSLY CONFUSED HELLPPPP PLEASE

Yuri [45]

Alright! Here are the answers:

1. C. Fluorine is more reactive than nitrogen because fluorine needs only one electron to fill its outermost shell.

2. Aluminum (Al)

6 0

3 years ago

SOMEONE PLEASE HELP

Zinaida [17]

Answer:

6. 7870 kg/m³ (3 s.f.)

7. 33.4 g (3 s.f.)

8. 12600 kg/m³ (3 s.f.)

Explanation:

6. The SI unit for density is kg/m³. Thus convert the mass to Kg and volume to m³ first.

1 kg= 1000g

1m³= 1 ×10⁶ cm³

Mass of iron bar

= 64.2g

= 64.2 ÷1000 kg

= 0.0642 kg

Volume of iron bar

= 8.16 cm³

= 8.16 ÷ 10⁶

$= 8.16 \times 10^{ - 6} \: kg$

$\boxed{density = \frac{mass}{volume} }$

Density of iron bar

$= \frac{0.0642}{8.16 \times 10^{ - 6} }$

= 7870 kg/m³ (3 s.f.)

$\boxed{mass = density \: \times volume}$

Mass

= 1.16 ×28.8

= 33.408 g

= 33.4 g (3 s.f.)

8. Volume of brick

= 12 cm³

$= 12 \times 10^{ - 6} \: m^{3} \\ = 1.2 \times 10^{ - 5} \: m ^{3}$

Mass of brick

= 151 g

= 151 ÷ 1000 kg

= 0.151 kg

Density of brick

= mass ÷ volume

$= \frac{0.151} {1.25 \times 10^{ - 5} } \\ = 12600 \: kg/ {m}^{3}$

(3 s.f.)

6 0

3 years ago