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2 years ago

Scientists make observations, conduct experiments, and draw conclusions. Which statement is true of all scientists?

Chemistry

2 answers:

Vsevolod [243]2 years ago

7 0

Answer:

study the natural world

MatroZZZ [7]2 years ago

5 0

Answer:

C, Scientists study the natural world

Explanation:

Science studies the natural world. This includes the components of the physical universe around us like atoms, plants, ecosystems, people, societies, and galaxies, as well as the natural forces at work on those things.

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How many moles of Mg(OH)2 will react with 2.5 mol HCI?

bekas [8.4K]

Answer:

1.25mole of Mg(OH)₂

Explanation:

The reaction is between Mg(OH)₂ and HCl, this is a neutralization reaction between an acid and a base.

Mg(OH)₂ + 2HCl → MgCl₂ + 2H₂O

The balanced reaction equation is given above.

2 mole of HCl reacts with 1 mole of Mg(OH)₂

So, 2.5mole of HCl will react with $\frac{2.5}{2}$ = 1.25mole of Mg(OH)₂

The number of moles of Mg(OH)₂ is given as 1.25mol

5 0

2 years ago

HELPPPP ANSWERSS!!! A. 13 B. 8 C. 15 D. 5

KATRIN_1 [288]

Answer:

Explnation:

4 0

2 years ago

How do changes in temperature affect the rate of a reaction?

SpyIntel [72]

Answer:An increase in temperature commonly will increase the rate of reaction. An growth in temperature will improve the common kinetic electricity of the reactant molecules.

Explanation:

8 0

1 year ago

Look at the Recording station detector on the upper left side of the Gizmo. What happens when the seismic waves hit the recordin

Ne4ueva [31]

Answer:

I don’t know what recording station you’re referring to but, When seismic waves reach the seismograph, a graphical record, or seismogram, is produced

Explanation:

4 0

2 years ago

choose the reaction that illustrates delta H *f for Ca(NO3)2.(A) Ca (s) + N2 (g) + 3O2 ---> Ca(NO3)2 (s)(B) Ca2 (aq) + 2 NO3-

kompoz [17]

Answer: The correct answer is Option A.

Explanation:

Standard enthalpy of formation is the change in enthalpy of one mole of a substance present at the standard state that is 1 atm of pressure and 298 K of temperature. The substance is formed from its pure elements under the same conditions.

We are given a chemical compound having chemical formula $Ca(NO_3)_2$

This compound is formed by the combination of calcium, nitrogen and oxygen elements.

The chemical equation for the formation of $Ca(NO_3)_2$ from the components in their standard states follows:

$Ca+N_2+3O_2\rightarrow Ca(NO_3)_3$

Hence, the correct answer is Option A.

3 0

3 years ago