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galben [10]
3 years ago
14

What is an isotope exactly⊕

Chemistry
1 answer:
lisov135 [29]3 years ago
3 0
An isotope is a variant on an element that has a different atomic weight from other variants
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At 25°C, gas in a rigid cylinder with a movable piston has a volume of 145 mL and a pressure of 125 kPa. Then the gas is compres
natta225 [31]

Answer:

(4) 230 kPa

Explanation:

The temperature is constant, so the only variables are pressure and volume.

We can use Boyle’s Law.

p_{1}V_{1} = p_{2}V_{2}

Divide both sides of the equation by V_{2}.

p_{2} = p_{1} \times \frac{V_{1}}{ V_{2}}

p_{1} = \text{145 kPa}; V_{1} = \text{125 cm}^{3}}

p_{2} = ?; V_{2} = \text{80. cm}^{3}

p_{2} = \text{145 kPa} \times \frac{\text{125 cm}^{3}}{\text{80. cm}^{3}} = \textbf{230 kPa}

7 0
3 years ago
Witch term refers to a universal fact sometimes nased on mathematical equastions
ss7ja [257]

Answer:

AXIOM.

Explanation:

8 0
3 years ago
Which of the following is NOT the same as 13.6 milliliters?
rjkz [21]
HI There! 

Which of the following is NOT the same as 13.6 milliliters?- 0.0136 dkL
- 0.0136 L
- 0.136 dL

Answer:<span>0.0136 dkL</span>
4 0
3 years ago
What pressure (in atm) is required to contain 0.034 moles of oxygen gas in a 5.1 L container at a temperature of 25.00C
kherson [118]

Answer:

0.16 atm

Explanation:

Let's look at the formula PV=nRT. First of all, T should be in kelvin, so let's add 273. Now solve for P so we get P = nRT/V.

Now let's plug these in...

P = (0.034 mol)(0.08206 L atm mol^-1 K^-1)(298 K)/5.1 L

After solving and rounding to sig figs we get 0.16 atm

5 0
2 years ago
Explain why the following chemical equation represents a Lewis acid-base reaction. H+ + NH3 —&gt;NH4+
lozanna [386]

Answer:

Due to an electron-pair acceptor and donor.

Explanations:

<em><u>Lewis acid</u></em> can be defined as an electron-pair acceptor. An example is Hydrogen ion(H+). This is because it is a proton and it distributes positive charge which means that it accepts electrons(negative charge).

<em><u>Lewis base</u></em> can be defined as an electron-pair donor. This is because it donates electrons to be accepted by the proton. An example is ammonia(NH3).

7 0
3 years ago
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