Given the balanced equation representing a reaction:CH4(g) + 2O2(g) --> 2H2O(g) + CO2(g) + heat
Which statement is true about energy in this reaction?
(1) The reaction is exothermic because it releases heat.
(2) The reaction is exothermic because it absorbs heat.
(3) The reaction is endothermic because it releases heat.
(4) The reaction is endothermic because it absorbs heat.

Answers

Answer 1

Answer: The answer is (1) the reaction is exothermic because it releases heat. From the reaction, we can see that the heat is at the right of the equation which means the reaction releases heat. So it is called exothermic reaction. Endothermic reaction absorbs heat.

Answer 2

Answer:

Answer: The answer is (2) the reaction is exothermic because it releases heat.

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The number of white blood cells decreases when fighting infection.
True
False

Answers

TRUE

Does the white blood cell count decrease when fighting an infection?

This is because your body releases more of these cells to fight the infection. However, if you have certain illnesses such as HIV or cancer, your white blood cell count can drop to very low levels. Taking medicines that weaken your immune system may reduce your WBC.

it produces antibodies to fight bacteria, viruses, and other potentially harmful invaders. Neutrophils. They kill and digest bacteria and fungi. They are the most type of white blood cells and are the first line of defense in the event of an infection.

Adults have a low white blood cell count of less than 4,000 cells per microliter of blood. Low white blood cell counts can be an indicator of certain medical conditions, including lupus, rheumatoid arthritis, vitamin deficiency, or side effects of cancer treatment.

Learn more about WBC here:brainly.com/question/9332702

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false
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For water to become a mechanical weathering agent through ice wedging, it needs to go through a cycle of freezing and thawing.True
False

Answers

The statement "For water to become a mechanical weathering agent through ice wedging, it needs to go through a cycle of freezing and thawing." is true

An Arrhenius acid has(1) only hydroxide ions in solution
(2) only hydrogen ions in solution
(3) hydrogen ions as the only positive ions in solution
(4) hydrogen ions as the only negative ions in solution

Answers

Answer: (3) hydrogen ions as the only positive ions in solution

Explanation: Arrhenius acids are substances which dissociate in water to give $H^+$ ions.

For example: $HCl$ is an Arrhenius acid.

$HCl\rightarrow H^++Cl^-$

Arrhenius bases are substances which dissociate in water to give $OH^-$ ions.

For example: $NaOH$ is an Arrhenius base.

$NaOH\rightarrow Na^++OH^-$

The answer is (3) hydrogen ions as the only positive ions in solution. One ionic compound must have positive ion and negative ion at the same time. The Arrhenius base has hydroxyl ion as only negative ions in solution.

What is the Ka’aba?an Islamic deity
a Muslim pilgrim
a book of Sharia laws
an ancient stone temple

Answers

Answer: Ka'aba is Muslim pilgrimage

Explanation: Kaaba is a small shrine located in Mecca and is considered as a sacred spot by Muslims.

It is a cube shaped structure made up of graystone and marble. It's corners correspond to the points of a compass and is mostly kept covered with a cloth called kiswah.

Answer:

D. An ancient Stone Temple

Explanation:

Edg 2021

The two types of scales that are printed on the meter face of an analog VOM are A. single and double scales.
B. polarized and non-polarized scales.
C. positive and negative scales.
D. linear and non-linear scales.

Answers

i think it is D because that sound like vom

Answer:

Linear and non_ linear scales

Explanation:

Find the molarity of the following solutions: 0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution.

Answers

M(molarity)=moles/volume
M=.5mol/.05L=10M

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The scientific evidence that scientists use in supporting or critiquing the conclusions of experiments usually consists of

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