3 years ago

When communicating with Apollo astronauts, there is approximately a 1.3 second delay in one-way communication. This is because

Chemistry

1 answer:

mario62 [17]3 years ago

3 0

Radio waves travel at a speed of 186,00 miles/s

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Evgen [1.6K]

Explanation:

1. neutrons

2. protons

3. protons and neutrons

4. neutrons

5. electrons

I'm not sure with 1 and 4, sorry :<

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3 years ago

Find the number of mol-atom in 7.1 gr cl

marin [14]

I don’t know if this would help but my cousin said this: Molecular weight of chlorine = 71, so 7.1/71 = 0.1 mol of Cl2

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3 years ago

Cuales son los compuestos químicos inorgánicos utilizados en la formación de huesos

Ilia_Sergeevich [38]

Answer:

Explanation:

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3 years ago

Which solution will form a precipitate when mixed with a solution of aqueous na2co3? which solution will form a precipitate when

trapecia [35]

Answer:

$CuCl_{2}(aq.)$ will form a precipitate of insoluble $CuCO_{3}$ when aqueous $Na_{2}CO_{3}$ is added.

Explanation:

According to solubility rule-

all carbonates are insoluble except group IA compounds and $NH_{4}^{+}$

all salts of sodium are soluble

When $Na_{2}CO_{3}$ is added to given solutions, a double displacement reaction takes place in each solution to form a sodium salt and a carbonate salt.

So, in accordance with solubility rule, addition of $Na_{2}CO_{3}$ into $CuCl_{2}(aq.)$ will result precipitation of insoluble $CuCO_{3}$

Reaction: $Na_{2}CO_{3}(aq.)+CuCl_{2}(aq.)\rightarrow 2NaCl(aq.)+CuCO_{3}(aq.)$

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3 years ago

A 1.0 × 10−3 mol/dm3 solution of hydrochloric acid has a pH of 3.0

vivado [14]

Answer:

Explanation:

pH = -log[OH]

pH = -log[1.0 x 10–5]

pH = -log[10–5]

pH = -(-5)log10

pH = +5

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3 years ago