1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
amid [387]
3 years ago
10

Which type of change creates a new substance, physical or chemical?

Chemistry
2 answers:
Fynjy0 [20]3 years ago
7 0
A chemical change creates a new substance. A physical change doesn't alter a substance while a chemical change does.

Hope this helps!
elena-14-01-66 [18.8K]3 years ago
4 0
A chemical change does
You might be interested in
HELPP please I’ll mark you as brainlister it’s 100 points
Andrei [34K]

Answer:

4

Explanation:

hope this helps, can i have brainliest

4 0
2 years ago
Estimate the Calorie content of 65 g of candy from the following measurements. A 15-g sample of the candy is placed in a small a
GrogVix [38]

Answer:

The calorie content of  65g of candy is 326.78 cal

Explanation:

Step 1: Data given

Mass of the candy = 15.00 grams

Mass of the container = 0.325 kg

Mass of water = 1.75kg

0.624 kg at an initial temperature of 15.0°C.

The specific heat of aluminium = 0.22 Cal/kg°C

The specific heat of water = 1 cal/kg°C

Step 2: Calculate calorie content for a 15 gram sample

ΔQ = Σm*c*ΔT

 ⇒ m = mass in grams

⇒ with c= the specific heat in Cal/kg°C

⇒ with ΔT = T2 -T1 = the change in temperatures in °C

ΔQ = m(bomb) * C(aluminium) * ΔT + m(cup) * C(aluminium) * ΔT + m(H2O) * c(H20) * ΔT

ΔQ = (m(bomb) + m(cup)) * c(aluminium)  + m(H2O)*c(H20) ) * ΔT

⇒ with mass of the bomb calorimeter = 0.325 kg

⇒ with mass of the cup = 0.624 kg

⇒ with c(aluminium) = the specific heat of aluminium = 0.22 Cal/kg°C

⇒ with mass of water = 1.75 kg

⇒ with c(water) = the heat capacity of water = 1 Cal/kg°C

⇒ with ΔT = the change in temperature = T2 - T1 = 53.5 - 15.0 = 38.5 °C

ΔQ = 0.325*0.22*38.5 + 0.624*0.22*38.5 + 1.75*1*38.5

ΔQ = ((0.325 + 0.624)*0.22 + 1.75*1)*38.5

ΔQ = 75.41 cal

Step 3: Calculate the calorie content for a 65 gram sample

For a 65g sample the calorie content will be more or less 4x higher than a 15 gram sample:

ΔQ = 75.41  * (65/15) = 326.78 cal

8 0
2 years ago
Please someone help me out thank you I’ll give brainlist :))
Tom [10]

Answer:

Ionization energy increases going left to right across a period and increases from bottom to top in a group

Electron affinity increases when going up a group

If we are excluding noble gases (aka group 8/18), Chlorine is the element that has the greatest electron affinity. This is because Fluorine's 2p orbital is limited and packed which doesn't quite allow sharing of the orbital with extra electrons easily, while Chlorine has a 3p orbital allowing more space for electrons, where the orbital electrons would be inclined to do so.

Helium is the element with the greatest ionization energy since it's at the top and energy (from Oganesson to Helium) increases when going across a period (from Hydrogen to Helium).

4 0
2 years ago
Help meee!! this is really confusing my brain
Natasha_Volkova [10]

Answer:

I believe it's (3)

Explanation:

same number of proton and electrons in both atoms A and atom B. but different number of neutron

6 0
2 years ago
using information about natural laws explain why some car crashes produce minor injuries and others produce catastrophic injurie
Roman55 [17]

My main reason would be momentum – it depends on the mass as well as the speed of the colliding objects. For example if two sedans travelling in a low speed bump each other, then probably the damage would be minimal scratches. However, if a high speed car crashes unto a heavy truck also travelling fast, then the result would be catastrophic. 

7 0
3 years ago
Other questions:
  • NaCl + H2O → NaOH + Cl2 + H2 How many grams of chlorine gas, Cl2 are given off if 7.5 grams of sodium chloride, NaCl, are decomp
    6·1 answer
  • A sample of neon occupies a volume of 478 mL at STP. What will be the volume of the neon when the pressure is reduced to 93.3 kP
    15·1 answer
  • An antifreeze solution is made by mixing ethylene glycol (ρ = 1116 kg/m3) with water. suppose the specific gravity of such a sol
    13·1 answer
  • A weak acid. What is the pH of a 0.1 M solution of acetic acid (pKa = 4.75)?
    7·1 answer
  • A graduated cylinder contains 19.6 mL of water
    11·1 answer
  • How Mendeleev's systematic approach resulted in the development of his Periodic Table of elements.
    12·1 answer
  • Give two examples in your everyday experience where diffusion occurs. Can you think of a situation of where this might be harmfu
    11·1 answer
  • Why did you get that wrong?
    7·1 answer
  • What is a line graph
    15·1 answer
  • A certain first-order reaction has a rate constant of 2.15×10−2 s−1 at 20 ∘C. What is the value of k at 55 ∘C if Ea = 72.0 kJ/mo
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!