12-8y-x(3y-4)(3-2y) factorize​

A voltmeter is an instrument used for measuring electric potential difference between two points in an electric circuit. It is connected in parallel. It usually has a high resistance so that it takes negligible current from the circuit.

Radhey Radhey ✨

Step-by-step explanation:

Answer: if x=55,the x+y=180-55. x+y=125. y=125÷2. y=64.5. x=64.5. if they are isocleces triangle bcz u did not give other properties.

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They are always equal to each other to find an unknown complementary angle remember complementary angles add up to 90 degrees just subtract the amount of the known angle from 90 to get the missing.

Since, 3.38 g of carbon dioxide are obtained, the mass of C present in the sample of welding fuel gas is

12/44×3.38=0.92 g.

Since, 0.690 g of water are obtained, the mass of hydrogen present in the welding fuel gas sample is

2/18×0.690=0.077g.

The percentage of C is

0.92/0.92+0.077×100=92.3 %.

The percentage of H is

0.077/0.92+0.077 ×100=7.7%.

.

Explanation:

(i) The number of moles of carbon =

92.2/12

=7.7.

The number of moles of hydrogen =

7.7

=7.7.

The mole ratio C:H=

7.7/1

7.7

=1:1.

Hence, the empirical formula of the welding fuel gas is CH.

(ii) The weight of 10.0 L of gas at N.T.P is 11.6 g.

22.4 L pf gas at N.T. P will weigh

11.6/10.0×22.4=26g/mol

This is the molar mass.

(iii) Empirical formula mass is 12+1=13.

Molecular mass is 26.

The ratio, n of the molecular mass to empirical formula mass is

26/13

=2.

The molecular formula is 2(CH)=C2H2

Answer:

here is ur answer

Explanation:

see the attachment pic

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Step-by-step explanation:

Subtract the given supplementary angle (its value in degrees) from 180 to calculate the size of the angle in question

Answer:

subtract it from 180degreee