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2 years ago

Jim went for a 3.75 hour run. How many minutes did he run?

1 answer:

5 0

An hour is 60 minutes. So you multiple the hot by 60. You get 180 minutes plus the 75 remaining minutes. The answer is 255

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Calculate ΔH for the reaction: C(graphite) + 2H 2(g) + 1/2 O 2(g) => CH 3OH(l) Using the following information: C(graphite) +

Alika [10]

Answer:

$\Delta H$ for the given reaction is -238.7 kJ

Explanation:

The given reaction can be written as summation of three elementary steps such as:

$C(graphite)+O_{2}(g)\rightarrow CO_{2}(g)$ $\Delta H_{1}= -393.5 kJ$

$2H_{2}(g)+O_{2}(g)\rightarrow 2H_{2}O(l)$ $\Delta H_{2}= (2\times -285.8)kJ$

$CO_{2}(g)+2H_{2}O(l)\rightarrow CH_{3}OH(l)+\frac{3}{2}O_{2}(g)$ $\Delta H_{3}= 726.4 kJ$

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$C(graphite)+2H_{2}(g)+\frac{1}{2}O_{2}(g)\rightarrow CH_{3}OH(l)$

$\Delta H=\Delta H_{1}+\Delta H_{2}+\Delta H_{3}=-238.7 kJ$

4 0

3 years ago

Need the answer ASAP

wolverine [178]

Answer:

Explanation:

8 0

2 years ago

Why is stoichiometry is used in cooking?

labwork [276]

Answer:

Explanation:

stoichiometry is used in cooking because it helps you determine the amount or proportion of compounds you will need in a chemical reaction. Stoichiometry is present in daily life, even in the cooking recipes we make at home. The reactions depend on the compounds involved and how much of each compound is needed to determine the product that will result.

7 0

2 years ago

Which of these is a characteristic of index fossils

dimulka [17.4K]

Answer: A index fossil is any animal or plant preserved in the rock record of the earth that is characteristic of a particular span of geologic time or environment. A useful index fossil must be distinctive or easily recognizable, abundant, and have a wide geographic distribution and a short range through time.

Explanation:

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2 years ago

What is the mass in grams of 5.2 moles of NaCl? 303.89 g 0.09 g 119.6 g 1828

Vitek1552 [10]

Explanation:

mole=mass/molar mass

mass= mole×molar mass

m= 5.2×( 23+35.5)

m= 5.2×58.5

m= 304.2g

6 0

2 years ago