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3 years ago

How many nanometers are in 0.0006245101 km?

Chemistry

1 answer:

maw [93]3 years ago

5 0

Answer:

624510100

Explanation:

Doing a conversion factor:

$0,0006245101[km]*\frac{1000[m]}{1 km} *\frac{1x10^{9} nanometer}{1 m} =624510100 [nanometer]$

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If you have a 12.0 gram steel ball at sea level and then take it up to mt. Fuji what will change?

andrey2020 [161]

The air pressure. the air pressure increases as the altitude an object is at increases.

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3 years ago

2C2H2 + 5O2 → 4CO2 + 2 H2O How many grams of CO2 are required to react with exactly 3.00 mol of O2? 106 g 132 g 165 g 76.8 g

cricket20 [7]

Hey there!:

Given the reaction:

2 C2H2 + 5 O2 → 4 CO2 + 2 H2O

5 moles O2 ------------- 4 moles CO2

3.00 moles O2 ---------- ( moles of CO2 ?? )

moles of CO2 = 3.00 * 4 / 5

moles of CO2 = 12 / 5

moles of CO2 = 2.4 moles

So, molar mass CO2 = 44.01 g/mol

Therefore:

1 mole CO2 -------------- 44.01 g

2.4 moles CO2 ---------- ( mass of CO2 )

mass of CO2 = 2.4 * 44.01 / 1

mass of CO2 = 106 g

Answer A

Hope that helps!

8 0

3 years ago

Which substance is a base? HCOOH RbOH H2CO3 NaNO3

Alex Ar [27]

Answer:

RbOH

Explanation:

For this question, we have to remember what is the definition of a base. A base is a compound that has the ability to produce hydroxyl ions $OH^-$ , so:

$AOH~->~A^+~+~OH^-$

With this in mind we can write the reaction for each substance:

$HCOOH~->~HCOO^-~+~H^+$

$RbOH~->~Rb^+~+~OH^-$

$H_2CO_3~->~CO_3^-^2~+~2H^+$

$NaNO_3~->~Na^+~+~NO_3^-$

The only compound that fits with the definition is $RbOH$ , so this is our base.

I hope it helps!

6 0

3 years ago

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How many electrons are in the highest occupied energy level of a nuetral silicon atom?

Ludmilka [50]

A). 4
.........................

3 0

3 years ago

How many grams are in 0.220 mol of Ne?

kumpel [21]

Answer:

4.44 g Ne

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic Table
Using Dimensional Analysis

Explanation:

Step 1: Define

0.220 mol Ne

Step 2: Identify Conversions

Molar Mass of Ne - 20.18 g/mol

Step 3: Convert

$0.220 \ mol \ Ne(\frac{20.18 \ g \ Ne}{1 \ mol \ Ne} )$ = 4.4396 g Ne

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

4.4396 g Ne ≈ 4.44 g Ne

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3 years ago

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