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3 years ago

5

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. What other characteristic does the radiation

have?
some shielding required
no mass
large mass
high penetrating power

2 answers:

MrRissso [65]3 years ago

7 0

The radiation emitted is a beta particle with a -1 charge. <span>Beta particles have a </span><span>medium penetrating power. An emission of beta particles requires shielding because of the hazards it pose to humans. Thus, one characteristic of this radiation is that some shielding is required.</span>

Svetradugi [14.3K]3 years ago

3 0

Answer: The correct answer is A.

Explanation:

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Use the following balanced reaction to solve:

Naily [24]

Answer: 60.7 g of $PH_3$ will be formed.

Explanation:

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given volume}}{\text{Molar volume}}$

$\text{Moles of} H_2=\frac{60L}{22.4L}=2.68moles$

The balanced chemical reaction is

$P_4(s)+6H_2(g)\rightarrow 4PH_3(g)$

$H_2$ is the limiting reagent as it limits the formation of product and $P_4$ is the excess reagent.

According to stoichiometry :

6 moles of $H_2$ produce = 4 moles of $PH_3$

Thus 2.68 moles of $H_2$ will produce= $\frac{4}{6}\times 2.68=1.79moles$ of $PH_3$

Mass of $PH_3=moles\times {\text {Molar mass}}=1.79moles\times 33.9g/mol=60.7g$

Thus 60.7 g of $PH_3$ will be formed by reactiong 60 L of hydrogen gas with an excess of $P_4$

3 0

3 years ago

A small piece of Cr metal reacts with dilute HNO3 to form H2 (g), which is collected over water at 18 C in a large flask. The to

Sauron [17]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The partial pressure is $P_p= 737.5 mm \ of \ Hg$

Explanation:

The Partial pressure of $H_2$ is mathematically represented as

$P_p = P_T -P_w$

Where $P_T$ is the total pressure of water with a value of 15.5 mm of Hg

$P_w$ is the partial pressure of water with a value 753 mm of Hg

Now substituting values

$P_p = 753-15.5$

$P_p= 737.5 mm \ of \ Hg$

3 0

3 years ago

Read 2 more answers

When balance the following chemical equations N2+O2= NO2 the coefficient for O2 is

Papessa [141]

Answer:

2

Explanation:

N₂ + O₂ ---> NO₂

balance

N₂ + 2O₂ ---> 2NO₂

4 0

2 years ago

How many moles are in 64.8 l of f2 gas

Licemer1 [7]

6.02×[10]1 ×64.8=3900.96 moles

7 0

2 years ago

According to Boyle's law, for a fixed quantity of gas at a given temperature, what quantity relating pressure P and volume V is

yan [13]

<u>Answer:</u> The quantity relating pressure and volume is $PV=k$ and the size of the tank must be $1.92\times 10^3L$

<u>Explanation:</u>

To calculate the new volume, we use the equation given by Boyle's law. This law states that pressure is inversely proportional to the volume of the gas at constant temperature.

Mathematically,

$P\propto \frac{1}{V}$

Or,

$PV=k$

The equation given by this law is:

$P_1V_1=P_2V_2$

where,

$P_1\text{ and }V_1$ are initial pressure and volume.

$P_2\text{ and }V_2$ are final pressure and volume.

We are given:

$P_1=160atm\\V_1=12L\\P_2=1atm\\V_2=?L$

Putting values in above equation, we get:

$160atm\times 12L=1atm\times V_2\\\\V_2=\frac{160\times 12}{1}=1920L=1.92\times 10^3L$

Hence, the size of the tank must be $1.92\times 10^3L$

7 0

3 years ago