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3 years ago

Fill out the blank About 30% of the sun's energy is _______ by clouds and the atmosphere

Chemistry

1 answer:

BaLLatris [955]3 years ago

5 0

I think the answer is Reflected, but I may be wrong.

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Two soccer teams, the Bears and the Panthers, played games at the same time in two different locations. The Bears game was playe

motikmotik

Answer:

Bears

Explanation:

because starch is heavy and it requires a lot of oxygen in an environment. so having starch in an environment with less oxygen could probably cause fatigue

5 0

3 years ago

Would you expect the carbonyl carbon of benzaldehyde to be more or less electrophilic than that of acetaldehyde? Explain using r

Slav-nsk [51]

Answer:

Benzaldehyde is less electrophilic than acetaldehyde

Explanation:

Electrophilicity of carbonyl carbon depends on it's positive charge density.

In benzaldehyde, phenyl group can act as an electron donating group towards carbonyl group due to it's electron donating resonating effect.

In acetaldehyde, methyl group can act as an electron donating group towards carbonyl group due to it's electron donating inductive effect.

We know that resonating effect are more stronger than inductive effect.

Henece, it is expected that positive charge density on carbonyl carbon is much lower in benzaldehyde than acetaldehyde.

So, benzaldehyde is less electrophilic than acetaldehyde.

Resonating effect of phenyl group has been shown below.

4 0

3 years ago

Can anyone give an image of your own science room

madam [21]

Answer:

i don't have one :(

Explanation:

just doing for points sorry plz mark me as brainliest

6 0

4 years ago

A scientist has two solutions, which she has labeled solution a and solution

Lelu [443]

To determine the amount of each solution that she should use, we do mass balance for the whole process. We let x be the amount the 65% salt and y the amount of the 90% salt. We do as follows:

The total mass should be equal to 150 oz.

x + y = 150

Doing a salt balance, we obtain the second equation:
.65x + .90y = 150(.85)

Solving for x and y, we obtain:

x = 30 oz
y = 120 oz

6 0

3 years ago

How many helium atoms are there in a helium blimp containing 536 kg of helium? n = atoms?

Mariulka [41]

Answer:- $8.07*10^2^8atoms$

Solution:- It is a unit conversion where it asks to convert kg of He to atoms. We need to convert kg to grams, grams to moles and finally moles to atoms.

We know that, 1 kg = 1000 g

Molar mass of He is 4.0 grams per mole and 1 mole of an atom equals to Avogadro number of atoms.

The set up would be as given below:

$536kg(\frac{1000g}{1kg})(\frac{1mole}{4g})(\frac{6.02*10^2^3atoms}{1mole})$

= $8.07*10^2^8atoms$

So, there are $8.07*10^2^8atoms$ of He in it's 536 kg.

5 0

4 years ago