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Sphinxa [80]
3 years ago
14

What happens to the total current provide by a battery as bulds add to a parallel Circuit

Chemistry
1 answer:
Goryan [66]3 years ago
3 0
Direct current is electromotive force powering from a battery. Adding bulbs increases resistance.

Resistance equals volts divided by current.
Or current equals volts divided by resistance. Current lowers.
You might be interested in
What is the molecular formula of the hydrocarbon whose molar mass is 536 g/mol and contains 89.55 w/w% carbon?
leonid [27]

Given the percentage composition of HC as C → 81.82 % and H → 18.18 %

So the ratio of number if atoms of C and H in its molecule can will be:

C : H = 81.82 12 : 18.18 1 C : H = 6.82 : 18.18 = 6.82 6.82 : 18.18 6.82 = 1 : 2.66 ≈ 3 : 8

So the Empirical Formula of hydrocarbon is:

C 3 H 8

As the mass of one litre of hydrocarbon is same as that of C O 2 The molar mass of the HC will be same as that of C O 2 i.e 44 g mol

Now let Molecular formula of the HC be ( C 3 H 8 ) n

Using molar mass of C and H the molar mass of the HC from its molecular formula is:

( 3 × 12 + 8 × 1 ) n = 44 n So 44 n = 44 ⇒ n = 1

Hence the molecular formula of HC is C 3 H 8

Does that help?

7 0
3 years ago
Which best describes a chain reaction associated with a nuclear reaction A Neutrons released during a fusion reaction cause othe
Gnoma [55]

Answer:

Neutrons released during a fission reaction cause other nuclei to split

7 0
2 years ago
A distance of one centimeter is the same as<br> 100 m<br> 10 m<br> .01 m<br> 1000 m
katovenus [111]
0.01m
...................
3 0
3 years ago
Read 2 more answers
What is the pH when 10.0 mL of 0.20 M potassium hydroxide is added to 30.0 mL of 0.10 M cinnamic acid, HC9H7O2 (Ka = 3.6 × 10–5)
astra-53 [7]

Answer:-

Solution:- As is clear from the given Ka value, Cinnamic acid is a weak acid. let's calculate the moles of acid and KOH added to it from their given molarities and mL.

For KOH,  10.0mL(\frac{1L}{1000mL})(\frac{0.20mol}{1L})

= 0.002 mol

For Cinnamic acid,  30.0mL(\frac{1L}{1000mL})(\frac{0.10mol}{1L})

= 0.003 mol

Acid and base react as:

HC_9H_7O_2(aq)+KOH(aq)\rightleftharpoons KC_9H_7O_2(aq)+H_2O(l)

The reaction takes place in 1:1 mol ratio. Since the moles of acid are in excess, the acid is still remaining when all the kOH is used.

0.002 moles of KOH react with 0.002 moles of Cinnamic acid to form 0.002 moles of potassium cinnamate. Excess moles of Cinnamic acid = 0.003 - 0.002 = 0.001

As the solution have weak acid and it's salt(or we could say conjugate base), it is a buffer solution and the pH of the buffer solution could easily be calculated using Handerson equation:

pH=pKa+log(\frac{base}{acid})

pKa could be caluted from given Ka value using the formula:

pKa = - log Ka

pKa=-log3.6*10^-^5

pKa = 4.44

let's plug in the values in Handerson equation and calculate the pH:

pH=4.44+log(\frac{0.002}{0.001})

pH = 4.44+0.30

pH = 4.74

So, the first choice is correct, pH is 4.74.

6 0
2 years ago
The hydrogen emission spectrum is shown below. What is the energy of the
Leviafan [203]

The energy of the 434 nm emission line is 4.58×10¯¹⁹ J (Option A)

<h3>Data obtained from the question </h3>

The following data were obtained from the question:

  • Wavelength (λ) = 434 nm = 434×10¯⁹ m
  • Planck's constant (h) = 6.626×10¯³⁴ Js
  • Speed of light (v) = 3×10⁸ m/s
  • Energy (E) =?

<h3>How to determine the energy </h3>

The energy of the 434 nm emission line can be obtained as follow:

E = hv / λ

E = (6.626×10¯³⁴ × 3×10⁸) / 434×10¯⁹ 9.58×10¹⁴

E = 4.58×10¯¹⁹ J

Thus, the energy of the 434 nm emission line is 4.58×10¯¹⁹ J

Learn more about energy:

brainly.com/question/10703928

#SPJ1

8 0
1 year ago
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