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3 years ago

Describe the effect on death rate of having only nurses working in ward b and not doctors

Biology

1 answer:

Bess [88]3 years ago

5 0

Believe it or not but there are nurses better then doctors but i say there is a 10% chance more will die

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How is enthalpy used to predict whether a reaction is endothermic or exothermic?

Radda [10]

Answer:

$329.48 KJ/mol$ heat is released by the combustion of $2 mol$ of methane

Explanation:

The value of enthalpy determines whether the reaction is exothermic or endothermic. If the enthalpy change is positive, then the reaction is endothermic (heat or energy released) and if the enthalpy change is negative then the reaction is exothermic (heat or energy absorbed).

$2CH_4(g)+4O_2(g) => 2CO_2(g)+4H_2O(g)$

$\Delta H \ reaction=[ 2(\Delta HfCO_2)+ 4(\Delta HfH_2O)]-[2(\Delta HfCH_4)+4(\Delta HfO_2)]$

= $2 ( -(393.5 KJ)/mol)-[2( -74.6 KJ/mol)+4(-241.82 KJ/mol)]$

$= -787 KJ/mol-[ -149.2 KJ/mol-967.28 KJ/mol]$

$= -787 KJ/mol+1116.48 KJ/mol$

$=329.48 KJ/mol$

In this question, the enthalpy of formation has positive value and hence the reaction is endothermic in which the heat is released.

3 0

3 years ago

40 points please answer the two questions in the picture!!

nikdorinn [45]

Answer:

it's going to be called nucleotides

6 0

3 years ago

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Water moves between the ocean, atmosphere, and land. In which form does water enter the atmosphere?Select one of the options bel

zysi [14]

The answer is B.

Water in the form of vapor enter the atmosphere. The vapor accumulates in the atmosphere to form clouds. Once the clouds are heavy enough, the water in the form of droplets fall towards land or as rain. It could also be in the form of other precipitation such as snow or hail. As the sun hits the waters in the land, it causes the water to evaporate and the cycle continues.

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3 years ago

Help! My cat has done this 3 times. She falls over, starts kicking her leg, and biting it or biting her tail. She usually doesn’

Nataly_w [17]

This pet needs to be taken to the vet ASAP

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3 years ago

Because of their shape when seen from the ground, tornados are called ______. A. V clouds B. Tube clouds C. Funnel clouds D. Wed

lesya692 [45]

Answer:

C. Funnel clouds

Explanation:

Tornato is a revolving column of air in touch with earth surface, linked to a convective clouds.

It usually resembles its look, like a funnel cloud.

4 0

3 years ago