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
trasher [3.6K]
3 years ago
6

How many calories are needed to raise the temperature of 25 grams of water form 50°C to 70°C. The specific heat of water is

Chemistry
2 answers:
Papessa [141]3 years ago
7 0

Answer:

500 cal

Explanation:

Gala2k [10]3 years ago
4 0

Answer:

500 cal

Explanation:

m=25g,c=1cal/g, change in temperature=70-50,20 degree Celsius Q=?

using formula Q=mxcx change in theta

Q=25x1x20

Q=500cal

You might be interested in
For the reaction 2 HCl + Na2CO3 → 2 NaCl + H2O + CO2 8.0 moles of CO2 is collected at STP. What is the volume of CO2? 1. 57.6 L
Dmitry [639]

Answer:

Option 5. 179L

Explanation:

The reaction is:

2 HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂

The amount of collected CO₂ is 8 moles.

We apply the Ideal Gases Law at STP

STP are 1 atm of pressure and 273K of T°

P . V = n . R . T

1atm . V = 8 mol .0.082L.atm/mol.K . 273K

V = (8 mol .0.082L.atm/mol.K . 273K) / 1 atm = 179 L

6 0
3 years ago
How many moles are there in 545g of <img src="https://tex.z-dn.net/?f=" id="TexFormula1" title="" alt="" align="absmiddle" class
Pachacha [2.7K]

answer: 3.40625 moles

Explanation: see the attached pics

8 0
2 years ago
Use the periodic table to identify the element indicated by each electron configuration by typing in the
EleoNora [17]

Answer:

1s22s22p6: Neon (Ne)

1s22s22p63s23p3: Phosphorous (P)

1s22s22p63s23p64s1: Potassium (K)

1s22s22p63s23p64s2(im not sure what 308 is supposed to be): Calcium (Ca)

1s22s22p63s23p64s23d104p65s24d3: there is no pure element that ends 4d3 that I know of so this can either be Zirconium(Zr) if it ends in 4d2 or Niobium (Nb) if it ends in 4d4

Explanation:

you can look at the periodic table and the trends to find the rough idea of where the electron configuration ends, there are helpful articles and images on these, i attached an image that may help. After that you can look at the atomic number to find the number of electrons for a pure element and use the electron subshell pattern thing to find the exact number

5 0
1 year ago
Three products of destructive distillation of coal <br>please answer quickly ​
muminat

Answer:

the three products of destructive distillation of coal are:-

1. coal gas

2. coke

3. ammonia liquor

7 0
3 years ago
Read 2 more answers
If the pressure is 0.9 kPa. and the volume is 4.0L, then the pressure changes to 0.20 kPa. What is the new volume?
ch4aika [34]

Answer:

18 L

Explanation:

boyles law

P1V1 = P2V2

V2 = P1V1/P2

V2 = (.9 * 4)/.2

V2 = 18

4 0
2 years ago
Other questions:
  • At 900 K the following reaction has Kp=0.345: 2SO2(g)+O2(g)ââ2SO3(g) In an equilibrium mixture the partial pressures of SO2 and
    7·1 answer
  • What’re the answers?
    7·1 answer
  • How a convection current can enable a hawk or eagle to soar upward without flapping its wing 
    14·2 answers
  • Based on your observations in the lab, what do you think happens to the majority of water (not, ice) at the poles? at the equato
    7·1 answer
  • The illustration depicts possible routes of collisions in the reaction CH₂CH₂ + HCl CH₃CH₂Cl. Which of the following statements
    6·2 answers
  • What is the rate constant of a first-order reaction that takes 5.50 minutes for the reactant concentration to drop to half of it
    12·1 answer
  • Help
    5·1 answer
  • If I can still dissolve more sugar into the solution at a certain temperature what would I call that solution
    8·1 answer
  • Consider the reactivity of phenol, bromobenzene, toluene, and nitrobenzene toward electrophilic aromatic substitution.
    10·1 answer
  • Predict the products if Calcium Carbonate reacts with Silver Sulfate.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!