All categories

2 years ago

How many molecules does 1 mole of O2 gas have?

Chemistry

2 answers:

ch4aika [34]2 years ago

4 0

Answer:

Explanation:

6.02 x 1023 molecules

raketka [301]2 years ago

3 0

Answer:

d.6.02×1023 molcules

You might be interested in

A scientist is studying two types of worms. Worm X has DNA identical to its parent. Worm Y has a combination of DNA from two par

beks73 [17]

Answer:

2. Worm Y reproduces sexually, which gives it genetic variation.

5 0

2 years ago

Read 2 more answers

Ethanol (c2h5oh) melts at -114Â°c. the enthalpy of fusion is 5.02 kj/mol. the specific heats of solid and liquid ethanol are 0.9

Nimfa-mama [501]

Answer: 4.18925 kJ heat is needed to convert 25.0 g of solid ethanol at -135 °C to liquid ethanol at -50°C.

Explanation:

Temperature of Solid $C_2H_5OH=-135^oC=138 K(0^oC=273K)$

Melting temperature of Solid $C_2H_5OH=114^oC=159 K$

Temperature of liquid $C_2H_5OH=-50^oC=223K$

Specific heats of solid ethanol = 0.97 J/gK

Specific heats of liquid ethanol = 2.3 J/gK

Heat required to melt the the 25 g solid $C_2H_5OH$ at 159 K

$\Delta T_1$ = 159 K - 138 K = 21 K

$Q_1=mc\Delta T= 25\times 0.97J/gK\times 21 K=509.25 J$

Heat required to melt and raise the temperature of $C_2H_5OH$ upto 223 K

$\Delta T_2$ = 223 K - 159 K = 64 K

$Q_2=mc\Delta T= 25\times 2.3J/gK\times 64 K=3680 J$

Total heat to convert solid ethanol to liquid ethanol at given temperature :

$Q_1+Q_2=509.25 J+3680 J=4189.25 J=4.18925 kJ$ (1kJ=1000J)

Hence, 4.18925 kJ of heat will be required to convert 25.0 g of solid ethanol at -135 °C to liquid ethanol at -50°C.

6 0

2 years ago

What is the PH of a solution if [H3O]= 1.7×10-3 M

jeka57 [31]

14 Molar is its molarity.

3 0

2 years ago

Please please !!! help me I’ve been doing this for 2 hours

MatroZZZ [7]

Answer:

3.7 x 10^23

is the right answer

6 0

2 years ago

What are two ways carbon returns from animal into the water

soldi70 [24.7K]

Split and merge into it. While they are alive, carbon returns from animals into water through waste products from respiration and defecation/urination. Another way when they are dead is from decaying remains. While they are alive, carbon returns from animals into water through waste products from respiration and defecation/urination.

Good enough?

8 0

2 years ago