3 years ago

Which of the following advances in food production were attributed to the green revolution of the 1960's and 1970's

Chemistry

2 answers:

ioda3 years ago

6 0

C improved irrigation systems

bulgar [2K]3 years ago

5 0

b.drought-resistant varieties of crop plant

just took the test and this was he answer

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The sum of the number of proteins and neutrons in an atoms nucleus is its __________ ___________.

otez555 [7]

Answer:

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Explanation:

In nuclear physics, the sum of the numbers of protons and neutrons present in the nucleus of an atom.

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2 years ago

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If you collect 1.75 L of hydrogen gas during a lab experiment when the room temperature is 23oC and the barometric pressure is 1

ziro4ka [17]

Answer:

$n=0.0747mol$

Explanation:

Hello,

In this case, since we can consider hydrogen gas as an ideal gas, we check the volume-pressure-temperature-mole relationship by using the ideal gas equation:

$PV=nRT$

Whereas we are asked to compute the moles given the temperature in Kelvins, thr pressure in atm and volume in L as shown below:

$n=\frac{105kPa*\frac{0.009869atm}{1kPa}*1.75L}{0.082\frac{atm*L}{mol*K}*(23+273.15)K} \\\\n=0.0747mol$

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2 years ago

Could anyone help me with question 3?

Gwar [14]

Second one i think.......

3 0

3 years ago

Plz help need this ASAP

Feliz [49]

Explanation:

option no 4 is correct answer

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2 years ago

3. How many grams of water will be produced from 15.0 grams of Methane? *<br> CH4 +2 02 → CO2 + 2H2O

jok3333 [9.3K]

CH4 + 2O2 = CO2 + 2H2O

According to molar weights :

16 gm CH4 + 64 gm O2 = 44 gm CO2 + 36 gm H2O

Since 16 gm CH4 produce 36 gm H2O

Hence 2.5 gmCH4 produce 36×2.5/16 gm H2O

= 5.265 gm of H2O
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