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3 years ago

Describe how this instrument works. Operation:

Chemistry

2 answers:

scoundrel [369]3 years ago

7 0

Answer:

its a telescope you see stars or plants

Explanation:

guapka [62]3 years ago

6 0

Answer:

Microscope

Explanation:

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Write the balanced chemical equations for the complete combustion of acetic acid (ch3cooh), the main active ingredient in vinega

pantera1 [17]

A combustion reaction usually happens when a hydrocarbon is reacted with an oxygen molecule producing water and carbon dioxide. It is an exothermic reaction which means it releases heat as the process proceeds. It is a spontaneous process where it readily happens without any supply of energy. The total kinetic energy of the reactants is greater than the activation energy that is why heat is being released. Acetic acid is a carboxylic acid and is classified as a hydrocarbon so when reacted with oxygen, it would yield carbon dioxide and water. The balanced chemical reaction would be as follows

CH3COOH + 2 O2 = 2 CO2 +2 H2O

7 0

4 years ago

Please help me with this chemistry question. Image attached.

Leya [2.2K]

Answer:

Moles of zinc chloride produced are 0.09942 moles.

Explanation:

$Zn+2HCl\rightarrow ZnCl_2+H_2$

Mass of zinc used = 6.5 g

Moles of zinc = $\frac{6.5 g}{65.38 g/mol}=0.09942 mol$

According to reaction, 1 mol of zinc gives 1 mole of zinc chloride,then 0.09942 moles of zinc will give :

$\frac{1}{1}\times 0.09942 =0.09942 mol$ of zinc chloride

Moles of zinc chloride produced are 0.09942 moles.

3 0

3 years ago

How much heat is lost or gained by the calorimeter

Maslowich

Answer:

1.113 kJ or 1,113 J.

Explanation:

I hope this helps :)

5 0

3 years ago

Find the equation of the line passing through the points (2, 1) and (5, 10).

Vedmedyk [2.9K]

The equation : y=3x-5

<h3>Further explanation </h3>

Straight-line equations are mathematical equations that are described in the plane of cartesian coordinates

General formula

y-y1 = m(x-x1)

y = mx + c

Where

m = straight-line gradient which is the slope of the line

x1, y1 = the Cartesian coordinate that is crossed by the line

c = constant

The formula for a gradient (m) between 2 points in a line

m = Δy / Δx

Gradient

$\tt \dfrac{10-1}{5-2}=3$

Equation

$\tt y-1=3(x-2)\\\\y-1=3x-6\\\\y=3x-5$

3 0

3 years ago

The balanced chemical equation for the reaction between PCl5 and water is given below. If 3.45 moles of HCl are produced, how ma

enyata [817]

The coefficients of the substances give you the ratio of the number of moles.
The 4 before the H2O and the 5 before the HCl tell you that for every 5 moles of HCl created, 4 moles of H2O had to react.

Therefore:
$(3.45mol HCl)(\frac{4 mol H2O}{5 mol HCl})$
can be used to find the moles of H2O that react.

$(3.45mol HCl)(\frac{4 mol H2O}{5 mol HCl}) = 2.76 mol H20$

6 0

3 years ago