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2 years ago

Explain the water cycle in your own words. make sure u tell the steps in order

Chemistry

1 answer:

gregori [183]2 years ago

7 0

Answer:

Collection - Evaporation - Condensation - Precipitation

Explanation:

The Water cycle is a series of continuous events that cause rain

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A 50g ice cube at 0 degrees celcius is added to a glass containing 400g of water at 45 degrees celcius. What is the final temper

PolarNik [594]

In a system, heat that is gained and lost should be conserved. We calculate as follows:

Heat from phase change + sensible heat from the change in tempeture of the ice = sensible heat from the change in temperature of water

mH(fusion) + mCpΔT = mCpΔT
.05 (335) + .050(4.184)( T - 0) = .4 (4.184)(45 - T)
T = 34.8 °C

4 0

3 years ago

A(n) _____ is a hydrocarbon in which one or more hydrogen atoms is replaced by a -COOH and a -NH^2 group. HELP PLEASE! Please ex

SVETLANKA909090 [29]

That would be an amino acid. The $NH_{2} (amine functional group)$ and -COOH is the functional group for a carboxylic acid hence AMINO ACID.

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3 years ago

Which period number is aluminum? And which group number is aluminum in?

erastovalidia [21]

13 is the number for it on the periodic table and Group 3 is the correct answer hope this helps.

7 0

3 years ago

Read 2 more answers

A sample of an unknown compound contains 82.63% C, and 17.37% H. Determine the empirical formula.

Leno4ka [110]

The actual amount of substance doesn’t matter for this problem, so assume an easy mass of compound using the percentages: 82.63 g C and 17.37 g H. There is also no need to worry about significant figures in an empirical formula problem.

Find the number of moles of each element:

$(82.63 \text{ g C})(\frac{1 \text{ mol C}}{12.011 \text{ g C}} )=6.88 \text{ mol C}\\(17.37 \text{ g H})(\frac{1 \text{ mol H}}{1.0078 \text{ g H}} )=17.2 \text{ mol H}$

Find the ratio of the elements, and simplify until there are whole numbers that you can put into the empirical formula.

$\frac{17.2 \text{ mol H}}{6.88 \text{ mol C}} =\frac{2.5 \text{ mol H}}{1 \text{ mol C}}=\frac{5 \text{ mol H}}{2 \text{ mol C}}$

There are 5 mol H for every 2 mol C, so the empirical formula should be ${\text{C}}_2{\text{H}}_5$ .

4 0

3 years ago

I need help with Chemistry: Mole Conversion<br> It must be answered in complete detail

PolarNik [594]

Answer:

As Per Given Information

Given mass of H₂O₂ ( Hydrogen Peroxide) 4.0 gm

We've been asked to find the number of moles in Hydrogen Peroxide .

First we calculate molecular mass of Hydrogen Peroxide .

Molecular mass of H₂O₂ = 1×2 + 16 × 2

Molecular mass of H₂O₂ = 2 + 32

Molecular mass of H₂O₂ = 34 gm

Now find the number of moles in given hydrogen peroxide .

$\diamond{\boxed{\blue{\bf{Number \: of \: moles \: = \frac{Given \: mass}{Molecular \: mass} }}}}$

Put the given value we obtain

$\sf \twoheadrightarrow \: Number \: of \: moles \: = \frac{4}{34} \\ \\ \sf \twoheadrightarrow \: Number \: of \: moles \: =0.117$

So, the number of moles is 0.117 .

7 0

2 years ago