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3 years ago

PLS ANSWER FAST AHAH distilled water is a pure substance true or false ?

Chemistry

1 answer:

mr Goodwill [35]3 years ago

3 0

Answer:

True

Explanation:

If you see distilled water, it's a pure substance. That means that there are only water molecules in the liquid. A mixture would be a glass of water with other things dissolved inside, like one of those powders you take if you get sick or Kool-Aid.

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The atmospheric pressure on a mountain is 550 mmHg and 1

andrew11 [14]

Answer:

0.72

Explanation:

if 760=1

550=x

=550÷760= 0.72 in two s.f

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3 years ago

Is this equation balanced or unbalanced?<br> C+02=CO2

LenKa [72]

This equation is balanced

4 0

3 years ago

The sun supplies about 1.0 kilowatt of energy for each square meter of surface area (1.0 kW/m^2 where a watt = 1 kJ/s) Plants pr

kaheart [24]

Answer:

0.092 %

Explanation:

The equation of the reaction can be computed as :

$12CO_2_{(g)} + 11H_2O_{(l)} \to C_{12}H_{22}O_{11} + 12O_{2_(g)}$

$\Delta H = 5645 \ kJ$

recall that; the number of moles = $\dfrac{mass}{molar \ mass}$

By applying the method of enthalpy of combustion for sucrose at the same time changing the time from hours to seconds, we can determine the total energy output.

i.e

$=\dfrac{0.20g \ of \ sucrose }{m^2 \ 3600 \ s}\times \dfrac{1 \ mol}{342.34 \ g}\times 5.645 kJ/mol$

$= 9.16 \times 10^{-4} \ kJ/m^2 s$

Given that the sun supplies about 1.0 kilowatt, to KJ/m² s, we have:

$1.0 \dfrac{kW}{m^2 }= 1.0 \dfrac{kJ}{m^2 s}$

Finally, the percentage of sunlight used to produce sucrose :

= $\dfrac{9.16 \times 10^{-4} \ kJ/m^2 \ s}{1.0 \ kJ/m^2 . s} \times 100\%$

= 0.092 %

6 0

3 years ago

A sample of 10K gold contains the following: 10.0g gold, 4.0g silver, 5.0g copper, and 5.0g nickel. What is the percent gold in

stellarik [79]

Answer:

oook

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Explanation:

but you follow me and give me brainliest ok by by by by

6 0

3 years ago

Read 2 more answers

Define the term ligand. Cu2+(aq) reacts with ammonia to form the complex ion

photoshop1234 [79]

The answer is ligand: a molecule or ion that can bond to a (central) metal ion (to form a complex);
NH3: Lewis base and Cu2+: Lewis acid (need both for mark);
<span>each NH3/ligand donates an electron pair (to Cu2+); forming coordinate covalent/dative covalent bond; i hope this help you.</span>

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3 years ago