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balu736 [363]
3 years ago
9

What is the tool used to predict the outcome of genetic crosses

Biology
1 answer:
Alenkasestr [34]3 years ago
8 0
A punnet square is the tool used to predict the outcome of genetic crosses.
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How is enthalpy used to predict whether a reaction is endothermic or exothermic?
Radda [10]

<u>Answer:</u>

<em>329.48 KJ/mol heat is released by the combustion of 2 molof methane</em>

<u>Explanation:</u>

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

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

3 0
3 years ago
Experiments are carried out to test a hypothesis by changing one variable at a time and including an unchanged variable termed a
natta225 [31]

According to the research, the correct option is control. Experiments are carried out to test a hypothesis by changing one variable at a time and including an unchanged variable termed a <u>control</u>.

<h3>What are Experiments?</h3>

It is the process by which one or more variables are intentionally manipulated by carrying out actions aimed at discovering or verifying certain phenomena.

In this sense, its basis is in the manipulation of the variables that are considered relevant, the control of strange variables and the randomization of the rest.

Therefore, we can conclude that according to the research, the correct option is control. Experiments are carried out to test a hypothesis by changing one variable at a time and including an unchanged variable termed a <u>control</u>.

Learn more about Experiments here: brainly.com/question/27750242

#SPJ1

6 0
1 year ago
Which statement describes a characteristic of a spiral galaxy?
artcher [175]

Answer:

If your just looking for a description here you go.

Explanation:

Most spiral galaxies contain a central bulge surrounded by a flat, rotating disk of stars. The bulge in the center is made up of older, dimmer stars, and is thought to contain a supermassive black hole. Approximately two-thirds of spiral galaxies also contain a bar structure through their center, as does the Milky Way.

Hope this helps.

4 0
3 years ago
When an enzyme is functioning at vmax, the rate of the reaction is limited by?
mestny [16]
I guess because of concentration.....it stops !
5 0
3 years ago
Pls me asap i took notes but couldn't find the note for this one
mamaluj [8]

Answer:

The problem needs to be stated at the beginning of the process.

Explanation:

Conclusions are formed at the end.

It is VERY important to form a hypothesis.

And data can be analyzed many many ways.

5 0
3 years ago
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