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Naddik [55]
3 years ago
5

Which example in the video is a physical change?

Chemistry
1 answer:
alexira [117]3 years ago
7 0

D melting ice cream because if u know what a physical change is its a change that you can reverse chimical change are changes you cant reverse so u can freeze back ice cream so :D

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Can someone help me? I will give BRAINLIEST
Mkey [24]

Troposphere is the highest layer of the atmosphere and touches space

Startophere is where stratus clouds form up high in the sky

The Mesosphere is the third layer you need to know and it’s low density ...yo?

Thermosphere we’re getting closer and closer to earth

Exoshpere were airplanes are high, buckle up it’s time to fly

4 0
3 years ago
Read 2 more answers
Timed PLS help
Bezzdna [24]

Answer:

19.5g is the theoretical yield of alum

Explanation:

Based on the balanced reaction, 4 moles of sulfuric acid produce 2 moles of alum. To solve this question we need to find the moles of H2SO4. With these moles we can find the moles of alum and its mass assuming all sulfuric acid reacts producing alum.

<em>Moles Sulfuric Acid:</em>

8.3mL = 0.0083L * (9.9mol/L) = 0.08217 moles sulfuric acid

<em>Moles Alum:</em>

0.08217 moles sulfuric acid * (2mol KAl(SO4)2•12H2O / 4mol H2SO4) =

0.041085 moles KAl(SO4)2•12H2O

<em>Mass Alum -Molar mass: 474.3884 g/mol-</em>

0.041085 moles KAl(SO4)2•12H2O * (474.3884 g/mol) =

<h3>19.5g is the theoretical yield of alum</h3>
3 0
2 years ago
Which of the following is NOT a characteristic that all living things share? *
Elenna [48]
The answer is able to talk
4 0
3 years ago
Read 2 more answers
PLEASEEE I BEGG YOU I WILL LITERALLY SEND YOU MONEY
tankabanditka [31]

Answer:

Q1. 0.82 mol

Q2. 9.20 g

Explanation:

Question 1

Step 1: Given and required data

  • Mass of NaHCO₃ (m): 68.88 g
  • Molar mass of NaHCO₃ (M): 84.01 g/mol

Step 2: Calculate the moles (n) corresponding to 68.88 g of NaHCO₃

We will use the following expression.

n = m/M

n = 68.88 g/(84.01 g/mol) = 0.82 mol

Question 2

Step 1: Given data

  • Moles of NaOH (n): 0.23 mol
  • Molar mass of NaOH (M): 40.00 g/mol

Step 2: Calculate the mass (m) corresponding to 0.23 moles of NaOH

We will use the following expression.

m = n × M

m = 0.23 mol × 40.00 g/mol = 9.20 g

5 0
3 years ago
If ethanol has a density of 0.785g/mL, calculate the volume of 83.7 g of ethanol.
ratelena [41]

Answer:

<h2>106.62 mL</h2>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density} \\

From the question

mass = 83.7 g

density = 0.785 g/mL

We have

volume =  \frac{83.7}{0.785}  \\  = 106.62420

We have the final answer as

<h3>106.62 mL</h3>

Hope this helps you

8 0
3 years ago
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