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scoundrel [369]
3 years ago
6

Is (H) a positive or negative value

Chemistry
1 answer:
sammy [17]3 years ago
3 0

Answer:

A chemical reaction that has a positive ΔH is said to be endothermic , while a chemical reaction that has a negative ΔH is said to be exothermic . What does it mean if the ΔH of a process is positive? It means that the system in which the chemical reaction is occurring is gaining energy.

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need help in getting a element superhero and the element i choose is Helium can you give me some ideas of a superhero to make us
slava [35]
You could design the hero with the powers of helium which then u can describe why u made the character with thoose powers 
3 0
3 years ago
What adaptation do lungfish have te help them walk and live on land?
Viktor [21]

Answer: biological adaptation

Explanation:

lungfish's lung is a biological adaptation. A biological adaptation is a physical change in an organism that develops over time. Like all fish, lungfish have organs known as gills to extract oxygen from water. The biological adaptation of the lung allows lungfish to also extract oxygen from the air.

I hope this helps :).

5 0
3 years ago
Read 2 more answers
When the contour lines are farther apart, is the slope more gradual or gentle.
nignag [31]

Hi Zyshoun32,

Your Question:

When the contour lines are farther apart, is the slope more gradual or gentle.

Answer:

<u>When the slope is more gradual the farther the contour lines are.</u>

When the slope is more steeper the closer the contour lines are.

4 0
3 years ago
What is the [OH-] in a solution<br> with a pol of 7.86?
yulyashka [42]

Answer:

pH of 7.86, then the [OH-] is equal to 10^(14-7.86) = 10^6.14 M

Explanation:

3 0
3 years ago
1)The average lethal dose of Valium is 1.52 mg/kg of body weight. Estimate how many grams of Valium would be lethal for a 200.-l
oksano4ka [1.4K]

Answer:

1. 0.138g of valium would be lethel in the woman

2. 125mg/min is the drip of the patient

Explanation:

1. In a body, an amount of Valium > 1.52mg / kg of body weight would be lethal.

A person that weighs 200lb requires:

200<u>lb</u> × (453.6<u>g</u> / <u>1lb</u>) × (1kg / 1000<u>g</u>) = <em>90.72kg (Weight of the woman in kg)</em>

90.72kg × (1.52mg / kg) =

137.9mg ≡

<h3>0.138g of valium would be lethel in the woman</h3>

2. The IV contains 1.5g = 1500mg/mL.

If the patient is receiving 5.0mL/h, its rate in mg/h is:

5.0<u>mL</u>/h × (1500mg/<u>mL</u>) = 7500mg/h

Now as 1h = 60min:

7500mg/<u>h</u> × (1<u>h</u> / 60min) =

<h3>125mg/min is the drip of the patient</h3>
7 0
3 years ago
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