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3 years ago

I need an answer ASAP What important role do sand dunes play?

Chemistry

1 answer:

Nezavi [6.7K]3 years ago

6 0

Answer:

Keeps tides on the shore and away from the city

Explanation

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Nhóm nào gồm tất cả các kim loại tan trong axit sunfuric đặc nóng nhưng không tan trong axit sunfuric loãng là

MakcuM [25]

Answer:Nhóm gồm tất cả các kim loại tan trong axit sunfuric đặc nóng nhưng không tan trong axit sunfuric lo

Al, Cu, Au.

Al, Fe, Cr.

Ag, Fe, Pt.

Ag, Cu, Hg.

Explanation:

4 0

3 years ago

These organs make urine by removing waste and water from the blood. What organs are shown in the picturehese organs make urine b

Orlov [11]

Answer:

kidneys i think

Explanation:

because

3 0

3 years ago

What word or two-word phrase best describes the shape of the fluoroform molecule?

Vlad [161]

Answer : The shape of the fluoroform molecule is Tetrahedral.

Explanation :

First we have to calculate the Hybridization of the molecule by formula,

$\text{Number of electrons} = \frac{1}{2}[V+H-C+A]$

where,

V = Number of valence shell electron in central atom

H = Number of neighboring monovalent atom

C = charge of cation

A = charge of anion

The central atom in this molecule is Carbon, it has 4 electrons in their valence shell.

The neighboring monovalent atoms are one Hydrogen atom and three Fluorine atom.

There is no charge of cation and anion on the given molecule.

V = 4

H = 1 Hydrogen atom + 3 fluorine atom = 4

C = 0

A = 0

By the above hybridization formula, we get

$\text{Number of electrons}= \frac{1}{2}[4+4-0+0]$ = 4

The number of electron pair = 4

The number of lone pair = 0

The number of electrons is 4, this means that the hybridization is $sp^{3}$ and the geometry of the molecule is Tetrahedral.

The geometry of the molecule is shown below.

3 0

3 years ago

Brandon is traveling in France. He weighs himself at a health club because he is concerned that he has eaten too many croissants

anastassius [24]

Answer:

For a: Yes, he has gained weight.

For b: The number of onions required is 1.

Explanation:

For a:

We are given:

Weight of Brandon checked earlier = 183 lb

Converting this into kilograms, we use the conversion factor:

1 kg = 2.205 lb

So, $183lb\times \frac{1kg}{2.205lb}=83kg$

And, weight of Brandon measured at the health club = 85.0 kg

As, the weight at the health club is more than the previous measured weight. So, Brandon has gained weight.

For b:

We are given:

Amount of diced onions a recipe calls = 125 g

Mass of 1 onion = 4 oz

Converting the mass of 1 onion to ounces, we use the conversion factor:

1 oz = 28.35 g

So, $4oz\times \frac{28.35g}{1oz}=113.4g$

To calculate the number of onions, we use the equation:

$\text{Number of onions}=\frac{\text{Mass of onion a recipe calls}}{\text{Mass of 1 onion}}$

$\text{Number of onions}=\frac{125g}{113.4g}=1.1\approx 1$

Hence, the number of onions required is 1.

6 0

3 years ago

How do nuclear power plants provide energy?

Troyanec [42]

A process called fission which generates heat to produce steam, which is used by a turbine generator to generate electricity.

3 0

4 years ago