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4 years ago

You go out to dinner and the bill comes to $ 26.37. How much should you tip if you want the tip to be 19.0 % of the bill?

1 answer:

6 0

If we want to tip 19% or 0.19 of a bill of $26.37

We just multiply 26.37*0.19=$5.01

Any questions please feel free to ask. Thanks

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What is the ionic charge for C, Si, Ge, Sn and Pb?

Alecsey [184]

An atom of carbon has 4 electrons in its outermost shell, which means that
<span>its ionic charge is 4+ or 4-
</span>Si is in same group as carbon so its also 4+ or 4-
Germanium is 4+.
Sn is also 2+ or 4+
Pb is usually +2

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3 years ago

A sample of 40.0 mL of hydrogen is collected by water displacement at a temperature of 20 degrees Celcius. The barometer reads 7

Roman55 [17]

Answer : The volume of the hydrogen at STP is, 36.8 mL

Explanation :

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1$ = initial pressure of gas = 751 torr

$P_2$ = final pressure of gas at STP = 760 torr

$V_1$ = initial volume of gas = 40.0 mL

$V_2$ = final volume of gas at STP = ?

$T_1$ = initial temperature of gas = $20^oC=273+20=293K$

$T_2$ = final temperature of gas at STP = $0^oC=273+0=273K$

Now put all the given values in the above equation, we get:

$\frac{751torr\times 40.0mL}{293K}=\frac{760torr\times V_2}{273K}$

$V_2=36.8mL$

Therefore, the volume of the hydrogen at STP is, 36.8 mL

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3 years ago

A capacitor has a peak current of 310 μa when the peak voltage at 300 khz is 3.0 v .

Ket [755]

I think the question for this problem, is to find the capacitance. The working equation would be:

C = Q/V,
where
Q = It

Since f = 1/t, t = (1/300 kHz)(1 kHz/1,000 Hz) = 3.33×10⁻⁶ s
So,
Q = (310×10⁻⁶ A)(3.33×10⁻⁶ s)
Q = 1.033×10⁻⁹ C

Thus,
C = (1.033×10⁻⁹ C)/(3 V)
<em>C = 3.44×10⁻¹⁰ F</em>

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4 years ago

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