Can someone help me with the question i have already answered

Fast!! Help me!! Subject- Science

Archy [21]

Last One.... If Im not Wrong!

Burning of Fossil Fuels, Increase the CO2 And therefore the Green Effect!!

8 0

3 years ago

What is an example of a invertebrate that doesn’t have an exoskeleton?

Tatiana [17]

Invertebrate means those organism which doesnot have backbone in their body .Some of the examples are:

1.Spider

2.earthworm

3.Starfish

4.Sea urchins.

hope this will help u a lot....

5 0

3 years ago

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A compunds whose empirical formula is xf3 consists of 65% f by mass. what is the atomic mass of x

Reika [66]

Empirical formula of compound is XF3

Compound consist of 65% F

In 100g of compound there is 65 g of F

= 65 / 19 moles of Fluorine = 3.421 moles

So moles of X = 3.421 / 3 = 1.140 moles

And in 100 g X consist of 35 g

So the molar mass of X = 35 / 1.140 = 30.71 g = 31 approximately

And it is the mass of phosphorus

So the empirical formula for the compound is PX3

4 0

3 years ago

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Whole numbers smaller than 20

Gennadij [26K]

Answer:

19 and below because a whole number is just a number that isn't a fraction. They are basic counting numbers

Explanation:

3 0

3 years ago

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You want to put a new CD in your car stereo.While driving at 45 mi/h,you look away for 2.0s.What distance (in miles) do you driv

KengaRu [80]

Answer:

You drive 0.025 miles blind (or 132 ft)

Explanation:

(distance) = (speed) x (time)

(distance blind) = (speed) x (time looking for CD)

(distance blind) = (45 mi/hr) x (2 s) x (1/3600 hr/s) = 0.025 miles = 132 ft

3 0

3 years ago