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emmasim [6.3K]
3 years ago
6

What makes a heterogeneous mixture different from a homogeneous mixture? The components are mixed unevenly instead of evenly wit

hin the heterogenous mixture. Insoluble instead of soluble particles are suspended within the heterogenous mixture. Two liquids that normally are not mixable are mixed in a heterogeneous mixture. The components within a heterogeneous mixture are elements instead of compounds.
Chemistry
1 answer:
bazaltina [42]3 years ago
8 0
<span>is a mixture that composes of components that aren't uniform or they have localized regions that all have different properties. Despite the term appearing to be highly scientific, there are various common substances that are heterogeneous mixtures

</span>
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A collection of coins contains 15 pennies, 14 dimes and 6 quarters. What is the percentage of pennies in the collection?
pychu [463]

Answer:

42.9%

Explanation:

the total number of coins is 15+14+6 = 35

so to find the % of pennies, divide the number of pennies by the total number of coins and times it all by 100

15/35 x 100 = 42.9%

8 0
3 years ago
The rate constant for this first‑order reaction is 0.550 s−10.550 s−1 at 400 ∘C.400 ∘C. A⟶products A⟶products How long, in secon
Alisiya [41]

Answer:

t=2.08s

Explanation:

Hello,

In this case, for first order reactions, we can use the following integrated rate law:

ln(\frac{[A]}{[A]_0} )=kt

Thus, we compute the time as shown below:

t=-\frac{ln(\frac{[A]}{[A]_0} )}{k}=- \frac{ln(\frac{0.220M}{0.690M} )}{0.55s^{-1}} \\\\t=-\frac{-1.14}{0.550s^{-1}}\\ \\t=2.08s

Best regards.

5 0
3 years ago
A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density? Answer in g/mL.
solong [7]

Answer:

The answer is

<h2>2.7 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

Density =  \frac{mass}{volume}

From the question

mass of aluminum = 40.5 g

volume = 15 mL

Substitute the values into the above formula and solve for the density

We have

Density =  \frac{40.5}{15}

We have the final answer as

<h3>2.7 g/mL</h3>

Hope this helps you

8 0
3 years ago
Think of a substance that does not dissolve in water. Any Examples?
worty [1.4K]

Answer:

sand, flour, water

Explanation:

7 0
3 years ago
Read 2 more answers
At stp,a certain mass of gas occupies a volume of 790cm3. find the temperature at which the gas occupies 1000cm3 amd has a press
Luden [163]

The temperature : 332.75 K

<h3>Further explanation</h3>

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.

volume of gas = 790 cm³ = 0.79 L

mol of gas at STP :

\tt \dfrac{0.79}{22.4}=0.035

Use ideal gas :

\tt PV=nRT

P=726 mmHg=0.955 atm

V= 1000 cm³ = 1 L

\tt T=\dfrac{PV}{nR}\\\\T=\dfrac{0.955\times 1}{0.035\times 0.082}\\\\T=332.75~K

3 0
2 years ago
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