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# Tutor profile: Jennifer D.

Inactive
Jennifer D.
PhD Scientist and Librarian with expertise in Biochem, Bio and Chem
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## Questions

### Subject:Chemistry

TutorMe
Question:

Butane is a hydrocarbon fuel similar to gasoline, but lighter. It is sold as “bottled gas”, and is used in cigarette lighters. The chemical formula of butane is C4H10. Consider the complete combustion of butane. (Parts a and b are independent.) a. H for the reaction is -2.89x103 kJ/mol of butane. How much heat would be obtained by burning 850 g of butane? b. Write a balanced equation for the complete combustion of butane. Show phases.

Inactive
Jennifer D.

a. 4.23x10^4 kJ b. 2 C4H10 (liquid) + 13 02 (gas) --> 8 CO2 (gas) + 10 H20 (liquid)

### Subject:Biology

TutorMe
Question:

A woman is heterozygous for an X-linked recessive allele that causes night-blindness. If she marries a man with night-blindness, what proportions of her female & male offspring will carry the night-blindness allele?

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Jennifer D.

All female offspring and half of male offspring

### Subject:Algebra

TutorMe
Question:

40x+15 = 22x -3 What is the value of x?

Inactive
Jennifer D.

x= -1

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