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3 years ago

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Chemistry

1 answer:

Wittaler [7]3 years ago

8 0

Answer:

Here is a set of possible answers:

By how much can CO2 emissions be reduced?

How much is it going to cost the city to install the wind farms?

Will families have to pay for part of the wind farms?

What is the out-of-pocket cost of installing solar panels on a house after the assistance has been granted?

Are there any yearly operating costs to use solar panels?

How reliable is solar energy in this area? In an average year, how many months can solar energy be used?

Do we have a backup source of energy if the wind farm or solar panels don’t generate enough electricity?

Explanation:

This is the actucal answer so you might want to change it up

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If a runner maintains a constant speed of 12 miles an hour how long will it take to complete a half marathon race of 13.1 miles?

Nutka1998 [239]

At 12 mph, how long does it take to go 13.1 miles?

We know that distance = rate * time
So we know that 13.1 = 12 * time
We can now see that time = 13.1/12 = 1.092 (hours)
That's approximately 1 hour and .092*60=5.52 minutes.

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3 years ago

Many grasses and few trees characterize ____________ (tundras/temperate grasslands).

Oksanka [162]

Answer:

Temperate Grasslands

Explanation:

Tundras have nothing to do with grass. Tundras are more like ice

8 0

3 years ago

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Why would a pregnant mother need more calcium than a woman her age that is not pregnant?

inessss [21]

Besides building teeth and bones, calcium also keeps your blood and muscles moving and helps your nerves send messages from your brain to the rest of your body. Your body can't make calcium, so you need to get it from food or supplements. While you're pregnant, try to get at least 1,000 mg of calcium every day.

5 0

3 years ago

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If two objects have the same masses, but different volumes, which one has the greater density? The one with less volume, or more

Sphinxa [80]

Less volume has a greater density

4 0

3 years ago

"how many moles of calcium atoms are in 2.5 moles of calcium carbonate caco3"

Montano1993 [528]

Answer: -

2.5 moles of calcium atoms are in 2.5 moles of calcium carbonate CaCO₃

Explanation: -

In order to solve such types of problems, the first step would be to write the chemical formula of the compound.

The chemical formula of calcium carbonate = CaCO₃

The chemical symbol of Calcium is Ca.

From the formula of calcium carbonate we can see that

1 mole of CaCO₃ has 1 mole of Ca

2.5 mole of CaCO₃ has $\frac{1 mole Ca }{1 mole CaCO₃} x 2.5 mole CaCO₃$

= 2.5 mol of Ca.

∴2.5 moles of calcium atoms are in 2.5 moles of calcium carbonate CaCO₃

5 0

3 years ago