2 years ago

Assuming that a sample of ethanol weighs 560 grams. What is the mass of hydrogen in grams for the sample?

Chemistry

1 answer:

Novosadov [1.4K]2 years ago

6 0

Answer:

BRO WHAT THEY ANSWER TO UR BUT NOT MINE OK

Explanation: I THINK THE ASNSWER IS C BUT NOT SURE.... HOPE IT HELPS

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The temperature and number of moles of a gas are held constant. Which of the following is true for the pressure of the gas?

Taya2010 [7]

Answer:

Pressure is inversely proportional to the volume of gas.

Explanation:

According to Boyle's law,

The volume of given amount of gas is inversely proportional to the pressure applied on gas at constant volume and number of moles of gas.

Mathematical expression:

P ∝ 1/ V

P = K/V

PV = K

when volume is changed from V1 to V2 and pressure from P1 to P2 then expression will be.

P1V1 = K P2V2 = K

P1V1 = P2V2

3 0

3 years ago

Which of the following is true of a gas?

mote1985 [20]

Answer:

Explanation:

6 0

3 years ago

Give the nuclear symbol for the isotope of silicon for which a=29? Enter the nuclear symbol for the isotope (e.G., 42he).

quester [9]

The mass number is the summation of number of proton and neutron present in a nucleus of an atom. For the neutral atom the number of positive charge (number of proton) must be equal to the number of electrons. The number of electrons present in an atom is the atomic number of the atom. The standard way to express the mass number (a) and atomic number (m) of a atom (say X) is $x^{a}_{m}$ . Now for silicon number of electron or atomic number is 14. And the mass number (a) given 29. Thus the expression nucleus of silicon will be $Si^{29}_{14}$