3 years ago

Justify which individual offspring would more likely survive, a fish reproduced from external

1 answer:

3 0

A. a horse

Because with internal fertilisation the mother can supply nutrition to the embryo until birth when it will be healthy enough to survive

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How much heat is needed to raise the temperature of 50g of a substance by 15c when the specific heat is 0.92?

kirill [66]

The heat needed to raise the temperature of 50g of substance by 15 c is calculated as follows

Heat = mc delta T

m= mass (50g)
c= specific heat capacity (0.92)
delta T= change in temperature( 15 c)

heat is therefore= 50 x 0.92 x 15 = 690

Nb: my answer has no units since the given specific heat capacity has no units

8 0

4 years ago

How many milliliters of a 0.275 M NaOH solution is required to react with 0.450 L of CO2 gas

padilas [110]

Volume of NaOH required to react = 145.5 ml

<h3>Further explanation</h3>

Reaction

CO₂(g) + 2 NaOH(aq) ⇒Na₂CO₃(aq) + H₂O(l)

The volume of CO₂ : 0.45 L

mol CO₂ at STP (O C, 1 atm) ⇒ at STP 1 mol gas 22.4 L :

$\tt mol~CO_2=\dfrac{0.45}{22.4}=0.02$