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user100 [1]
2 years ago
11

Which two practices are examples of how people use sciense

Chemistry
1 answer:
Semenov [28]2 years ago
6 0

Answer: A: Explaining natural events using facts and data AND B:Developing theories using many lines of evidence

Explanation: trust me.

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I need help with with number 1515. How many moles of NO2 are in a 37.058 L container at 101.28 kPa and -139.86
Andre45 [30]

Explanation:

To solve this question, we will use the Clayperon Equation:

P.V = n.R.T

where:

P = 101.28 kPa

1 atm = 101,325 Pa

x atm = 101,280 Pa

x = 1 atm

V = 37.058 L

n = we don't know

R = 0.082 atm.L/K.mol

T = -139.88 ºC = -139.88+273.15 = 133.27 K

1*37.058 = n*0.082*133.27

n = 0.29 moles

Answer: 0.29 moles

5 0
1 year ago
if the theoretical yield of a reaction is 26.0 grams and you actually recovered 22.0 grams what is the precent yield
netineya [11]
Percentage Yield = (Actual Yield ÷ Theoretical Yield) × 100  

∴ if theoretical yield is 26 g, but only 22.0 is recovered from the reaction, 
then Percentage Yield = (22 g ÷ 26 g) × 100  
                                       =  84.6 %
8 0
3 years ago
An estser is the reaction product between: a. Alcohol and organic acid
san4es73 [151]
An ester is the reaction product between A. alcohol and organic acid. 
3 0
3 years ago
How to know the elements amount of charge amount​
MrRa [10]

For a single atom, the charge is the number of protons minus the number of electrons

6 0
2 years ago
Which of the following statements is true? Atoms of isotopes of an element have different numbers of electrons. Atoms of isotope
serious [3.7K]

Answer:

atoms of isotopes of an element have different numbers of neutrons.

Explanation:

isotopes have the same number of protons, but different numbers of neutrons.

3 0
3 years ago
Read 2 more answers
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