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2 years ago

What do chemists study?

Chemistry

2 answers:

Masteriza [31]2 years ago

7 0

Chemists study atoms and how they behave in the physical world

Masja [62]2 years ago

6 0

Answer:

Explanation:

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An element with atomic number 10 is located to the .......... of an element with atomic number 9

drek231 [11]

Pink fluffy unicorns?

7 0

3 years ago

A gas-filled balloon having a volume of 3.50 L at 1.20 atm and 18°C is allowed to rise to the stratosphere (about 30 km above th

kolezko [41]

Answer:

620.71 L the final volume of the balloon.

Explanation:

Initial volume of the gas in the balloon= $V_1=3.50 L$

Initial pressure of the gas in the balloon= $P_1=1.20 atm$

Initial temperature of the gas in the balloon= $T_1=18^oC =291.15 K$

Moles of gases = n

$n=\frac{P_1V_1}{RT_1}$ ...[1]

Final volume of the gas in the balloon = $V_2=3.50 L$

Final pressure of the gas in the balloon = $P_2=5.70\times 10^{-3} atm$

Final temperature of the gas in the balloon = $T_2=-45^oC =228.15 K$

Moles of gases = n

$n=\frac{P_2V_2}{RT_2}$ ...[2]

[1] = [2]

$\frac{P_2V_2}{RT_2}=\frac{P_1V_1}{RT_1}$

$V_2=\frac{P_1V_1\times T_2}{T_1\times P_2}$

$V_2=\frac{1.29 atm \times 3.50 L\times 228.15 K}{5.70\times 10^{-3} atm\times 291.15 K}=620.71 L$

620.71 L the final volume of the balloon.

5 0

4 years ago

3s2 what is the period number

katen-ka-za [31]

If we're talking about the element Magnesium, it'd be in period three.

7 0

3 years ago

What's a design constraint?

o-na [289]

Constraints refers to demarcations of geometrical charecteristics between two or more entities or solid modeling bodies

3 0

3 years ago

A race car is driven by a professional driver at 99 . What is this speed in and ? 1 mile = 1.61 kilometers 1 hour = 60 minutes E

slavikrds [6]

Answer: The speed is equivalent to 159.39 kilometers per hour or 2.65 kilometers per minute.

Explanation:

Given, The speed of a race car = 99 miles/ hour

To convert the speed into kilometers per hour and kilometers per minute

Since 1 mile = 1.61 kilometers

So, Speed of car = (99 ) x (1.61 )

= 159.39 kilometers per hour.

Also, 1 hour = 60 minutes

Then, Speed of car = (159.39) ÷60

= 2.6565≈2.65 kilometer per minute.

Hence, the speed is equivalent to 159.39 kilometers per hour or 2.65 kilometers per minute.

4 0

4 years ago