3 years ago

If you can walk 2.1 miles in 35 minutes, how many days will take you to con

1 answer:

8 0

Answer:

HINT: calculate how much distance you walk in one minute(35 divided by 2.1), then multiply that by 60 to find how far you'll walk in an hour.

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what two bodies of water form a key transportation route connecting the interior of Canada to the Atlantic Ocean? and its scienc

hodyreva [135]

Answer:

Lake Ontario and St Lawrence Seaway

Explanation:

The Great Lakes are connected to the Atlantic Ocean through the St. Lawrence Seaway.

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3 years ago

In testing the effectiveness of an antacid compound, 20.0g of Hydrochloric Acid is mixed with 28.0g of Magnesium Hydroxide. Will

BartSMP [9]

Answer:

Base Mg(OH)2 does neutralise the acid and is 12g in excess.

Explanation:

2HCL +Mg(OH)2 -> MgCl2 + 2H20

2 * 36.458 g of HCL react with 58.319 g of Mg(OH)2 to neutralise it.

72.916 HCl reacts with 58.319 g of the base.

So 20 g HCl reacts with (58.319/72.916) * 20 = 16g.

There are 28 g of Mg(OH)2 so the base does neutralise all the acid.

The Mg(OH)2 is 28 - 16 = 12 g in excess.

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3 years ago

I need help with my homework.Calculate the number of formula units in: 41.5 grams CaBr2

lana66690 [7]

Answer:

$\text{ }1.25\times10^{23}\text{ formula units}$

Explanation:

Here, we want to calculate the number of formula units in the given molecule

We start by getting the number of moles

To get the number of moles, we have to divide the mass given by the molar mass

The molar mass is the mass per mole

The molar mass of calcium bromide is 200 g/mol

Thus, we have the number of moles as follows:

$\frac{41.5}{200}\text{ = 0.2075 mol}$

The number of formula units in a mole is:

$1\text{ mole = 6.02 }\times10^{22}\text{ formula units}$

The number of formula units in 0.2075 mole will be:

$0.2075\text{ }\times6.02\times10^{23}\text{ = }1.25\times10^{23}\text{ formula units}$

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1 year ago

Help if possible!<br> Picture attached with the problems.

MAVERICK [17]

1. 1 M , 2 M , 1 M
2. 10 mol , 0.1 mol , 0.5 mol
3. 0.5 L , 6.6 L , 5/21 L

M = mol/L

8 0

2 years ago

An object has a mass of 960 g and a volume of 15cm3 what’s the density?

loris [4]

Answer:

I think the density is 64g/cm^3

i did 960 divided by 15 to get 64.

8 0

2 years ago