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3 years ago

Im not sure for this one please help me

Chemistry

2 answers:

SSSSS [86.1K]3 years ago

8 0

Answer:It would be C

pshichka [43]3 years ago

6 0

Answer:

Fairly certain it is the tension of the string

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A student uses eight chocolate sandwich cookies to model the Moon's phases. The student separates each cookie and removes frosti

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3 years ago

How many elements and how many atoms are in MgCI2

aliina [53]

Answer: two elements and three atoms

Explanation:

An element is the simplest substance and hence cannot be broken down using chemical reactions.

Magnesium chloride $(MgCl_2)$ is an ionic compound formed by the transfer of electrons from element magnesium (Mg) to element chlorine (Cl) where Magmesium forms a cation $Mg^{2+}$ by losing two electrons and chlorine forms an anion $Cl^{-}$ by gaining electron.

There are 3 atoms in Magnesium chloride $(MgCl_2)$ which include one atom of magnesium (Mg) and two atoms of chlorine (Cl).

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3 years ago

Stellar fusion produces atoms up to and including ___________ Question 51 options: Helium (atomic number 2) Carbon (atomic numbe

Ganezh [65]

Explanation:

Stellar fusion is the nuclear reaction that occurs in stars.
In this reaction, the nuclei build to form heavier elements.
Stars fuse elements of lighter ones to heavier ones
This fusion reaction occurs in their cores.
During this process, a lot of energy is released.
This process is also known as stellar nucleosynthesis as there is a synthesis of the different nucleus.
Stellar fusion produces lighter elements of many types including iron(Fe) and nickel(Ni) in many of the giant stars.
These elements remain trapped in the cores of stars.

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3 years ago

Material property of glass

iren2701 [21]

The main characteristics of glass are transparency, heat resistance, pressure, and breakage resistance, and chemical resistance.

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3 years ago

Reaction Rates

inn [45]

Answer:

PART A 1st order in A and 0th order in B

Part B The reaction rate increases

Explanation:

The rate law of the arbitrary chemical reaction is given by

$-r_A=k\times\left[A\right]^\alpha\times\left[B\right]^\beta\bigm$

Replacing for the data

Expression 1 $0.00639=k\times{0.12}^\alpha\times{0.22}^\beta$

Expression 2 $0.01280=k\times{0.24}^\alpha\times{0.22}^\beta$

Expression 3 $0.00639=k\times{0.12}^\alpha\times{0.11}^\beta$

Making the quotient between the fist two expressions

$\frac{0.00639}{0.01280}=\left(\frac{0.12}{0.24}\right)^\alpha$

Then the expression for $\alpha$

$\alpha=\frac{ln\frac{0.00639}{0.01280}}{ln\frac{0.12}{0.24}}=1\bigm$

Doing the same between the expressions 1 and 3

$\frac{0.00639}{0.00639}=\left(\frac{0.22}{0.11}\right)^\beta$

Then

$\beta=\frac{ln\frac{0.00639}{0.00639}}{ln\frac{0.22}{0.11}}=0\bigm$

This means that the reaction is 1st order respect to A and 0th order respect to B .

By the molecular kinetics theory, if an increment in the temperature occurs, the molecules will have greater kinetic energy and, consequently, will move faster. Thus, the possibility of colliding with another molecule increases. These collisions are necessary for the reaction. Therefore, an increase in temperature necessarily produces an increase in the reaction rate.

4 0

3 years ago

Im not sure for this one please help me​

Im not sure for this one please help me