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2 years ago

What happened to Mendeleev's mother after he was accepted into St. Petersburg University?

Chemistry

1 answer:

Rama09 [41]2 years ago

4 0

Answer:

his mother died i think

Explanation:

Although he was not accepted, his mother was determined to give her son a first-class education and they walked to St. Petersburg. Dmitri was accepted into the Institute of Pedagogy on a full scholarship. That same year his mother died and at the age of sixteen, Dmitri was orphaned.

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I need help with number 17 pls someone pls ???

LenaWriter [7]

Answer:

can you pls say what subject it is pls and thank u

Explanation:

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3 years ago

Read 2 more answers

In 1927, a little-known Belgian priest named Georges Lemaître was the first to propose an expanding universe, based on Einstein’

MatroZZZ [7]

One of the pieces of evidence of the big bang theory where that celestial objects are scattered in the universe because of an explosion that supports the idea of the big bang.

The big bang is how astronomers explain the way the universe began.

The evidence that I've gathered from the widget that demonstrates that the universe is expanding is that galaxies and other celestial objects are moving away from each other, which is also one of the evidence of the big bang theory where the celestial objects are scattered in the universe because of an explosion that supports the idea of the big bang.

Learn more about the big bang here:

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2 years ago

The temperature on the moon is (4 points) about the same as the Earth hotter than the Earth most of the time goes from extremely

fiasKO [112]

Answer is C.) Goes from extremely cold to extremely hot during a lunar day 

The reason is because the temperatures on the moon are very hot in the daytime, about 100 degrees C. At night, the lunar surface gets very cold, as cold as minus 173 degrees C. This wide variation is because Earth's moon has no atmosphere to hold in heat at night or prevent the surface from getting so hot during the day.

6 0

3 years ago

A series of six solutions was prepared at the given concentrations. Sample A B C D E F Concentration (mM) 50 100 150 200 300 400

ioda

Answer:

300 mM

Explanation:

In order to solve this problem we need to calculate the line of best fit for those experimental values. The absorbance values go in the Y-axis while the concentration goes in the X-axis. We can calculate the linear fit using Microsoft Excel using the LINEST function (alternatively you can write the Y data in one column and X data in another one, then use that data to create a dispersion graph and finally add the line of best fit and its formula).

The formula for the line of best fit for this set of data is:

y = 0.005 * x

So now we calculate the value of x when y is 1.50:

1.50 = 0.005 * x

x = 300 mM

7 0

3 years ago

Select all that apply.

tekilochka [14]

Answer is:increase [Cl₂] and remove HCl from the product.
Chemical reaction: Cl₂ + CH₂Cl₂ → CHCl₃(chloroform) + HCl.
According to Le Chatelier's Principle, the position of equilibrium moves to counteract the change, the position of equilibrium will move so that the concentration of reactants decrease (Cl₂) and concentration of products of chemical reaction increase (CHCl₃) if increase concentration of reactants and decrease concentration of products.

3 0

3 years ago