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3 years ago

Test anxiety symptoms can include

Chemistry

2 answers:

Ber [7]3 years ago

5 0

D.) all of the above

AfilCa [17]3 years ago

4 0

Answer:

D.) All of the above

Explanation:

Anxiety can cause sweating, chaky hands, headaches etc

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Write the balanced equation for the reaction that occurs when methanol, CH3OH (I) is burned in air. What is the coefficient of m

IRISSAK [1]

Answer:

Explanation:

Methanol is an organic compound which burns with oxygen to produce carbon dioxide and water.

$2CH_3OH_{(l)}+3O_2_{(g)}\rightarrow 2CO_2_{(g)}+4H_2O_{(g)}$

Multiply coefficients times subscripts for each element in the formula, We get that there are 2 number of atoms of the carbon, 8 number of atoms of the hydrogen, and 8 number of atoms of the oxygen on both sides of equation. Hence, it is balanced.

<u>The coefficient of methanol from the balanced reaction is 2.</u>

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3 years ago

Which of the following

rjkz [21]

Explanation:

option B is the correct answer

100% sure

4 0

3 years ago

Which of the following specifies the correct reducing agent in the given redox reaction? View Available Hint(s) Which of the fol

padilas [110]

Answer: $NiO+CO\rightarrow Ni+CO_2$ : reducing agent is CO.

Explanation:

a) $Fe+Cu^{2+}\rightarrow Fe^{2+}+Cu$

The oxidation state of copper reduces from +2 to 0, it is getting reduced. As $Cu^{2+}$ gets reduced, it acts as an oxidising agent.

The oxidation state of iron increases from 0 to +2. Thus, it is getting oxidized. As $Fe$ gets oxidized, it acts as a reducing agent.

b. $2Na+Cl_2\rightarrow 2NaCl$

The oxidation state of chlorine reduces from 0 to -1, it is getting reduced. As $Cl_2$ gets reduced, it acts as an oxidising agent.

The oxidation state of sodium increases from 0 to +1. Thus, it is getting oxidized. As $Na$ gets oxidized, it acts as a reducing agent.

c. $C+O_2\rightarrow CO_2$

The oxidation state of oxygen reduces from 0 to -2, it is getting reduced. As $O_2$ gets reduced, it acts as an oxidising agent.

The oxidation state of carbon increases from 0 to +2. Thus, it is getting oxidized. As $C$ gets oxidized, it acts as a reducing agent.

d. $NiO+CO\rightarrow Ni+CO_2$

The oxidation state of nickel reduces from +2 to 0, it is getting reduced. As $Ni^{2+}$ gets reduced, it acts as an oxidising agent.

The oxidation state of carbon increases from +2 to +4. Thus, it is getting oxidized. As $CO$ gets oxidized, it acts as a reducing agent.

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4 years ago

Science fair projects for 7th grade ideas?

klio [65]

Volcano you make the volcano with baking soda and vinegera

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4 years ago

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A piece of magnesium ribbon reacts with oxygen to form magnesium oxide, mgo. what is the percent composition of the compound? qu

Wittaler [7]

The Percent composition of MgO is 60.304 % and 39.696 % respectively.

<h3>What percentage of the given chemical is there?</h3>

Mg + 1/2O₂ -------> MgO

We now want to know the percent composition of MgO in light of this reaction. Since the original reactants' and the product's mass are not provided, we can use the component's atomic weights to solve this problem.

Let's compute the molar mass of MgO since Mg has a molecular weight of 24.305 g/mol and O has a molecular weight of 15.999 g/mol:

molar mass of $MgO= 24.305 + 15.999 = 40.304 \frac{g}{mol}$

Now with this weight, let's see the percent composition of this compound:

Mg percentage = $\frac{24.305}{40.304 * 100} = 60.304$ %

O percentage = $\frac{15.999}{40.304 * 100} = 39.696$ %

The Percent composition of MgO is 60.304 % and 39.696 % respectively.

Learn more about percent composition here:-

brainly.com/question/11885179

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1 year ago