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Otrada [13]
3 years ago
8

Which electromagnetic waves are used in ovens and cell phone communications

Chemistry
2 answers:
yuradex [85]3 years ago
8 0
Thermal energy
hope it helps!
densk [106]3 years ago
7 0
Ovens use microwaves. Believe it or not, thats the name
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The exhaust gas from an automobile contains 3% by volume of carbon monoxide (CO). Express this concentration in mg/m3 at 25oC an
ser-zykov [4K]

Answer:

24540\frac{mg}{m^3}

Explanation:

Hello,

In this case, since the 3% by volume is represented as:

\frac{3L\ CO}{L\ gas}

By using the ideal gas equation we compute the density of CO:

\rho =\frac{MP}{RT} =\frac{28g/mol*1atm}{0.082\frac{atm*L}{mol*K}*298K}= 0.818g/L

Then we apply the conversion factors as follows:

=\frac{3L\ CO}{100L\ gas}*\frac{0.818g\ CO}{1L\ CO} *\frac{1000mg\ CO}{1g\ CO} *\frac{1000L\ gas}{1m^3\ gas} \\\\=24540\frac{mg}{m^3}

Regards.

4 0
3 years ago
Suppose you stir a little baking soda into water until the water looks clear again how could you prove to someone the material i
alukav5142 [94]
You could boil away the water, evaporating it, and leaving behind the solute.
8 0
3 years ago
What will the change in temperature be when 90 J are applied to 15 g of gold. (Cgold = 0.126 J/gºC)
luda_lava [24]

Answer:

48 °C

Explanation:

q = 90J

m = 15 g

C = 0.126 J/gºC

q = mct

90 = (15)(0.126)t

t = 47.62 °C = 48 °C

8 0
3 years ago
Read 2 more answers
Which of the following equations are balanced?
Debora [2.8K]

Answer:

The only balanced equation is:

2KClO₃ → 2KCl + 3O₂

Explanation:

In reactant side: 6 atoms of O, 2 atoms of Cl and 2 atoms of K

In product side: 2 atoms of K and 2 atoms of Cl + 6 atoms of O

CO + 3H₂ → CH₃OH

In reactant side: 1 C, 1 O and 6 H

In product side: 1 C, 4 H and 1 O

PCl₃ + 2Cl₂ → PCl₅

In reactant side: 1 P, 7 Cl

In product side. 1 P, 5 Cl

Mg + N₂ → Mg₃N₂

In reactant side 1 Mg and 2 N

In product side 3 Mg and 2 N

7 0
3 years ago
A salad including lettuce, tomatoes, and onions would be classified as a _________.
ANEK [815]

Answer:

simple salad

Explanation:

8 0
3 years ago
Read 2 more answers
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