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Vesnalui [34]
4 years ago
12

1.)Which of these is a unit of pressure?

Chemistry
1 answer:
algol [13]4 years ago
8 0

Answer:

1. 2nd choice

2. 2nd choice

5. 2nd choice

6. 2nd choice

(I find these multiple choices questionable...)

Explanation: I'm honestly too lazy to do the math for the rest but the conversions can be done simply by using a ratio like ½ = ⅓ and you cross multiply (you'll probably have one side with a variable, just divide both sides by the number multiplied to the variable if necessary).

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If a precipitation reaction occurs, what will be the products of the unbalanced
levacccp [35]

Answer:

{ \sf{B.  \: AgCl _{(s)}  + NaNO _{3(aq)}}}

Explanation:

Silver chloride precipitates out because it has a low value of Ksp.

7 0
3 years ago
an unknown amount of mercury (ii) oxide was decomposed in the lab. mercury metal was formed and 4.50 l of oxygen gas was release
Assoli18 [71]

The initial weight of mercury oxide in the sample was 59.1 g HgO.

<h3>Steps</h3>

chemical reaction

2HgO ⟶ 2Hg + O₂

the moles of O₂

pV = nRT

n = (pV)/(RT)

Data:

p = 0.970 atm

V = 4.50 L

R = 0.082 06 L·atm·K⁻¹mol⁻¹

T = 390.0 K

Calculation:

n = (0.970 × 4.500)/(0.082 06 × 390.0)

n = 0.1364 mol O₂

the moles of HgO

The molar ratio is 1 mol O₂/2 mol HgO.

Moles of HgO = 0.1364 mol O₂ × (2 mol Hg/1 mol O₂)

Moles of HgO = 0.2728 mol HgO

the mass of HgO

Mass of HgO = 0.2728 mol HgO × (216.59 g HgO/1 mol HgO)

Mass of HgO = 59.1 g HgO

<h3>What is the name of HgO?</h3>

For the creation of various organic mercury compounds and specific inorganic mercury salts, mercury(II) oxide, or HgO, serves as a source of elemental mercury.

This red or yellow crystalline substance is also utilised in mercury batteries and zinc-mercuric oxide electric cells as an electrode (combined with graphite).

<h3>What is the purpose of mercury oxide?</h3>

Mercuric oxide is a colourless, crystalline powder that ranges from yellow to orange-yellow.

It serves as a seed protectant, a pigment, a preservative, and an ingredient in alkaline batteries and cosmetics.

<h3>Is there a combination of mercury oxide?</h3>
  • The powder form of mercury oxide is dark black or dark brown.
  • An intimate blend of metallic mercury and mercuric oxide rather than a genuine compound.

learn more about mercury oxide here

brainly.com/question/3235037

#SPJ4

4 0
2 years ago
What is the complete balanced equation for the reaction that occurs when lithium carbonate (Li2CO3) is heated?
Fed [463]
When heating lithium carbonate (Li2CO3), it will dissociate to Li2O and Co2. So the balanced chemical equation of this reaction is Li2CO3 = Li2O + CO2. 
7 0
4 years ago
What does the air in the troposphere do as it heats up from the sun?
Digiron [165]
It usually holds more water because of evaporation and makes the earth very hot.
3 0
3 years ago
Camilla believes that Earth's crust is evenly thick all around the globe, Maclaya thinks that Camilla is wrong, but doesatt know
xenn [34]

Answer:Macaya (floruit 1802), was a Kongolese-born Haitian revolutionary military leader. Macaya was one of the first black rebel leaders in Saint-Domingue to ally himself with the French Republican commissioners Sonthonax and Polverel. He helped to lead forces that recaptured Cap-Français on behalf of the French Republicans.

Macaya was born in west-central Africa, probably in the Kingdom of Kongo, and taken to the French colony of Saint-Domingue as a slave. After the outbreak of the 1791 slave rebellion in northern Saint-Domingue, Macaya became a lieutenant of an elderly rebel commander named Pierrot. Pierrot's rebel forces were based in the hills outside of Le Cap (Cap Francaise), near Bréda plantation by 1793.

Explanation:

7 0
3 years ago
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