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3 years ago

8

Watch this video to observe a synthesis reaction, and then answer the questions that follow. Part A What are the reactants in th

e reaction? What are their properties? Perform a quick Internet search, if needed.

1 answer:

anygoal [31]3 years ago

5 0

Answer:

NA (natrium) and CI^2 (chlorine) are the reactants.

Explanation:

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If the volume of a gas container at 32 degrees Celsius changes from 1.55 L to 755 mL, what will the final temperature be?

QveST [7]

So to solve this you need to know Charles’s law which is: V1/T1=V2/T2. Where T1 and V1 is the initial volume and Temperature and V2 and T2 is the temperature and volume afterwards. So first plug in the numbers you are given. V1= 1.55L T1= 32C° V2= 755mL T2=?. Since your volumes are two different units you change 755mL to be in L so that would be 0.755 L. And since your temp isn’t in Kelvin you do 273+32= 305K°. You then would rearrange your equation to solve for T2 which is V2T1/V1. Then you plug in your numbers (0.755L)(305K)/1.55L. Then you solve and would be 148.5645161 —> 1.49 x 10^2 K

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3 years ago

Which process can be used to power a home? solar thermal energy neither solar thermal energy nor solar electric energy both sola

faltersainse [42]

Answer:

solar electric energy

Explanation:

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2 years ago

Light will interact with objects by making them appear opaque, translucent, or transparent. Please select the best answer from t

lbvjy [14]

Answer:

True (T)

Explanation:

By absorbing or reflecting or letting light pass through, things become opaque, translucent, or transparent.

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3 years ago

After decaying for 48 hours, one-sixteenth (1/16) of the original mass of a radioisotope sample remains unchanged. What is the h

Hunter-Best [27]

The half-life of this radioisotope : 12 hr

<h3>Further explanation </h3>

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.

Usually radioactive elements have an unstable atomic nucleus.

General formulas used in decay:

$\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}$

t = duration of decay

t 1/2 = half-life

N₀ = the number of initial radioactive atoms

Nt = the number of radioactive atoms left after decaying during T time

t=48 hr

$\tt \dfrac{Nt}{No}=\dfrac{1}{16}$

The half-life :

$\tt \dfrac{1}{16}=\dfrac{1}{2}^{(48/t\frac{1}{2} )}\\\\(\dfrac{1}{2})^4=(\dfrac{1}{2})^{48/t\frac{1}{2}}\\\\4=48/t\frac{1}{2}\\\\t\frac{1}{2}=12~hr$

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3 years ago

Number of molecules in lithium sulfate Li2So4

sertanlavr [38]

What the question there is nun

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3 years ago