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3 years ago

what is the atomic number of an element whose atom has the following electrons configuration: 1s22s22p63s23p63d24s2

Chemistry

1 answer:

k0ka [10]3 years ago

4 0

Answer:

Titanium

Explanation:

use the electron configuration chart. I might be wrong. Please double check

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When a chloride solution of an element is vaporized in a flame, the color of the flame is violet. What element could be in the s

IgorLugansk [536]

Answer:

The answer to your question is Mercury

Explanation:

The flame test essay is used to identify the identity of a substance because most elements show different colors when in flame.

There are many elements that burn violet when in flame especially elements of the group IA like Potassium, Rubidium, Cesium and also Cyanide and Mercury located in different groups.

But the bibliography tells us that Mercury chloride burns violet so this element is the correct answer because there is chloride in the sample of this question.

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3 years ago

Global winds are directly caused by the Earth's rotation and

Natali5045456 [20]

Answer:

A the uneven heating of earths surface

Explanation:

Because earths rotates on its axis, circulating air is deflected torward the right in the northern hemisphere and toward the left Southern Hemisphere. This is called the coriolis effect

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3 years ago

At room temperature, a melting solid produces a whitish liquid. A laser beam shined through the liquid is unaffected and produce

navik [9.2K]

The answer is a colloid.

8 0

3 years ago

How many milliners of hydrogen gas ar produced by the reaction 0.020 moles of magnesium with excess of hydrochloride acid at sto

jeyben [28]

Answer:- 448 mL of hydrogen gas are formed.

Solution:- It asks to calculate the volume of hydrogen gas formed in milliliters at STP when 0.020 moles of magnesium reacts with excess HCl acid. The balanced equation is:

$Mg+2HCl\rightarrow MgCl_2+H_2(g)$

There is 1:1 mol ratio between Mg and hydrogen gas. So, the moles of hydrogen gas is also equals to the moles of Mg reacted.

moles of Hydrogen gas formed = 0.020 mol

At STP, volume of 1 mol of the gas is 22.4 L. We need to calculate the volume of 0.02 moles of hydrogen gas.

$0.02mol(\frac{22.4L}{1mol})$

= 0.448 L

They want answer in mL. So, let's convert L to mL using the conversion formula, 1L = 1000mL

$0.448L(\frac{1000mL}{1L})$

= 448 mL

So, 0.020 moles of magnesium would produce 448 mL of hydrogen gas at STP on reacting with excess of HCl acid.

5 0

3 years ago

What is the time required for contamination source

Afina-wow [57]

Hi there!

It can take years to remove all of the harmful substances from the water.

I hope my answer helped :)

8 0

3 years ago