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slamgirl [31]
4 years ago
10

Which pair of elements are the most different

Chemistry
1 answer:
siniylev [52]4 years ago
5 0

After a radioactive atom decays, it is the same element that it was before with no measurable change in mass. the decay that is present is gamma decay because gamma decay has photons which has no mass unlike alpha and beta decay.

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Choose all the correct answers.
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3 years ago
Select the answer that CANNOT be used to fill in the blank in the following sentence:
8_murik_8 [283]

Answer:

the answer is ur mom

Explanation:

8 0
3 years ago
The pressure of a gas is _____ affected by the temperature and number of gas particles in a system, and it is _____ affected by
AlekseyPX
The pressure of a gas is directly affected by the temperature and number of gas particles in a system, and inversely affected by the volume of gas in the system.
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4 years ago
Read 2 more answers
A 9.75 L 9.75 L container holds a mixture of two gases at 41 ° C. 41 °C. The partial pressures of gas A and gas B, respectively,
Triss [41]

Answer:

The total  pressure P = 1.642 atm

Explanation:

From the dalton's law

Total pressure of the mixture is

P = P_{A} + P_{B} + P_{C} ----- (1)

P_A = 0.419 atm

P_B = 0.589 atm

P_C = \frac{nRT}{V}

n = 0.24 mole

R = 0.0821 \frac{L.Atm}{K.mol}

T = 41 °c = 314 K

P_C = \frac{(0.24)(0.0821)(314)}{9.75}

P_C = 0.634 atm

From equation (1)

P = 0.419 + 0.589 + 0.634

P = 1.642 atm

Thus the total  pressure P = 1.642 atm

3 0
3 years ago
Q # 1 For chemical reaction ,please help
horrorfan [7]

Answer:- d)  42 kJ of heat is released and the reaction is exothermic.

Solution:- Heat of reaction is the summation of heats of products - reactants.

\Delta H_r_x_n=\sum [products-reactants]

From given information, the energy contained by products is 352 kJ and the energy contained by reactants is 394 kJ. Let's plug in the values in the formula:

\Delta H_r_x_n  = [352 kJ - 394 kJ]

\Delta H_r_x_n  = -42 kJ

Heat of reaction is -42 kJ. The negative sign indicates the heat is released means the reaction is exothermic.  

So, the correct option is the last one, 42 kJ of heat is released and the reaction is exothermic.

5 0
3 years ago
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