A student tested a 0.1 M aqueous solution and made the following observations:• conducts electricity
• turns blue litmus to red
• reacts with Zn(s) to produce gas bubbles
Which compound could be the solute in this solution?
(1) CH3OH (3) HBr
(2) LiBr (4) LiOH

Answers

Answer 1

Answer:

A student tested a 0.1 M aqueous solution and made the following observations conducts electricity, turns blue litmus to red and reacts with Zn(s) to produce gas bubbles. The compound that could be the solute in this solution is HBr. The answer is number 3.

Answer 2

Answer:

The only ionic compound which can react with Zn(s) toproduce gas bubbles is HBr.

What is an electrolyte?

An electrolyte is a solution that is able to conduct electricity. This solution must contain ions as ions are the charge carriers in solution.

In this case, we have to look at the options and discover the compounds that are made of ions and the only ionic compound which can react with Zn(s) toproduce gas bubbles is HBr.

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Which of the following is true about limiting and excess reagents?

Links are reported

Answers

Answer:

the first one

Explanation:

I take this subject

Magnesium and nitrogen react in a combination reaction to produce magnesium nitride: 3 Mg + N2 → Mg3N2 In a particular experiment, a 9.27-g sample of N2 reacts completely. The mass of Mg consumed is __________ g.

Answers

Mass is the amount of the substance present in the sample of the mixture, it is a quantitative measure. The mass of the magnesium consumed is 23.76 gm.

What is mass?

Mass of any substance is the product of the moles of the substance and the molar mass of the substance present in the sample mixture.

The reaction can be shown as,

$\rm 3 Mg + N_(2) \rightarrow Mg_(3)N_(2)$

From the reaction the stoichiometry gives,

3 moles of magnesium reacts with 1 mole of nitrogen = 1 mole of magnesium nitride

The mass of the nitrogen reacted is given as 9.27 gm.

Calculate the number of moles of nitrogen:

$\begin{aligned}\rm Moles &=(\rm mass)/(\rm molar \; mass)\n\n& = (9.27)/(28)\n\n&= 0.33\;\rm moles\end{aligned}$

Calculate the moles of magnesium reacted:

$3 * 0.33 = 0.99 \;\rm moles$

Calculate the mass of magnesium reacted:

$\begin{aligned} \rm mass &= \rm moles * molar \; mass\n\n&= 0.99 * 24\n\n&= 23.76\;\rm gm\end{aligned}$

Therefore, the mass of magnesiumis 23.76 gm.

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Answer:

The mass of Mg consumed is 23.76 g.

Explanation:

Magnesium and nitrogen react as : three moles of magnesium reacts with one mole of nitrogen to give one mole of magnesium nitride.

as given that the mass of nitrogen reacted = 9.27 g

moles of nitrogen reacted = $(mass)/(molarmass)=(9.27)/(28)=0.33$

Thus moles of magnesium reacted = 3 X 0.33 = 0.99 moles

mass of Mg reacted = moles X atomic mass = 0.99 X 24 = 23.76 grams

What is the Charles and boyles law?

Answers

The Charles and Boyles law,is a gas law that says that the pressure and volume of a gas have an inverse relationship, when temperature is held constant. If you increase the pressure 10 times, the volume will decrease 10 times. You have a fixed mass of gas, so n (the number of moles) is constant. R is always constant - it is called the gas constant. Boyle's Law demands that temperature is constant as well.

Number of protons in an atom's nucleus?: _________

Answers

Answer:

The number of protons in the nucleus of an atom is its atomic number, which is unique to each element.

Explanation:

Answer:

It's the same as the atomic number e.g. Oxygen has the atomic number 8 so it has 8 protons in the nucleus.

Air pollution from automobiles and industrial power plants can be a source of chemical weathering due to the formation ofA. soil.
B. acid rain.
C. iron oxides.
D. calcium carbonate.

Answers

Also acid rain is created from the pollution of automobiles

Air pollution from automobiles and industrial power plants can be a source of chemical weathering due to the formation of C. iron oxides.

Which list of elements is arranged in order of increasing atomic radii?(1) Li, Be, B, C (3) Sc, Ti, V, Cr(2) Sr, Ca, Mg, Be (4) F, Cl, Br, I

Answers

Elements which are arranged in increasing order of atomic radii are F,Cl,Br, I.

What is atomic radius ?

Atomic radius is defined as the distance between nucleus of an atom and the valence electrons.In a group, atomic radii increases up to down as electrons are added in the next successive shell which increases the size of atom.

In a period, as electrons are added to the same shell the force of attraction between nucleus and valence electrons increases as a result of which atom tend to shrink resulting in decrease in atomic size.

As fluorine, chlorine, bromine and iodine are present in the same group their atomic size increases as new shells are added from top to bottom of periodic table., while for the elements given in other options they are present in same period or in different group and hence do not show an gradual increase in atomic radii.

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Answer: F,Cl,Br,l

Explanation:these elements are all part of group 17

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