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maw [93]
4 years ago
9

What did the high school scientist Danielle mallabone create to help save lives

Chemistry
1 answer:
Crank4 years ago
4 0

Answer:

a warming life jacket

Explanation:

You might be interested in
How many molecules are in 9.45 moles ? ( NaNO3)
Rzqust [24]

Answer:

There are 5.69*10²⁴ molecules in 9.45 moles.

Explanation:

The mole is defined as the amount of matter that particles have, that is, atoms and elementary entities.

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole and represents a quantity without an associated physical dimension. Avogadro's number applies to any substance.

Then the following rule of three can be applied: if 1 mole contains 6.023 * 10²³ molecules, 9.45 moles, how many molecules will it have?

amount of molecules=\frac{9.45 moles*6.023*10^{23}molecules }{1 mole}

Solving:

amount of molecules= 5.69*10²⁴⁴ molecules

<u><em>There are 5.69*10²⁴ molecules in 9.45 moles.</em></u>

8 0
3 years ago
If 1.20 moles of copper react with mercuric nitrate how many moles of mercury form
Andrej [43]
Reaction of Copper with Mercuric Nitrate is as follow,

                       Cu  +  Hg(NO₃)₂    →    Cu(NO₃)₂  +  Hg

According to equation,

                            1 Mole of Cu reacts to form  =  1 Mole of Hg

So,

           1.20 Moles of Cu will react to produce  =  X Moles of Hg

Solving for X,

                                   X  =  (1.20 mol × 1 mol) ÷ 1 mol

                                   X  =  1.20 mol of Hg
Result:
          1.20 mole of Cu when reacted with mercuric nitrate produces 1.20 moles of Hg.
3 0
4 years ago
Unit 3 Quiz
Natalija [7]

Answer:

the answer would be B

Explanation:

just makes sense

8 0
3 years ago
Read 2 more answers
What is the greatest use of groundwater? a. drinking b. industry c. agriculture d. recreation
babunello [35]

The correct answer to the question above is :

(c.) agriculture.

Agriculture is the greatest use of groundwater. Groundwater is a water found in the underground or beneath the Earth's surface, in the cracks and soil spaces.

Explanation:

Food and agriculture are the largest purchasers of water, requiring one hundred times more than we use for individual needs. Up to 70 % of the water we take from rivers and groundwater goes into irrigation, about 10% is used in residential applications and 20% in industry. Groundwater is the water today underneath Earth's outside in soil pore spaces and in the fractures of rock structures. A unit of rock or an unconsolidated alluvium is described as an aquifer when it can generate a usable quantity of water.

8 0
4 years ago
Read 2 more answers
How many grams of H2O are produced when 35.0 g of NaOH reacts with 17.5 g of CO,?
zhenek [66]

Answer:

2NaOH + CO2 -> Na2CO3 + H2O

1) Find the moles of each substance

\eq n(NaOH)=\frac{35.0}{22.99+16.00+1.008\\}\  =\frac{35.0}{39.998} \ = 0.8750437522 moles\\n(CO_{2} ) = \frac{17.5}{12.01+32.00} = \frac{17.5}{44.01} = 0.3976369007 moles\\

2) Determine the limitting reagent

\\NaOH = \frac{0.8750437522}{2} = 0.4375218761\\\\

∴ Carbon dioxide is limitting as it has a smaller value.

3) multiply the limiting reagent by the mole ratio of unknown over known

n(H2O ) = 0.3976369007 × 1/2

             = 0.1988184504 moles

4) Multiply the number of moles by the molar mass of the substance.

m = 0.1988184504 × (1.008 × 2 + 16.00)

   = 0.1988184504 × 18.016

   = 3.581913202 g

Explanation:

6 0
3 years ago
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