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
Ann [662]
3 years ago
7

What are the benefits and drawbacks to having a pouring temperature that is much higher than the metal’s melting temperature?

Chemistry
1 answer:
Mashcka [7]3 years ago
3 0

Answer:

The main advantage would be that with the pouring temperature being much higher, there is very little chance that the metal will solidify in the mould while busy pouring. This will allow for moulds that are quite intricate to still be fully filled. The drawbacks, though, include an increased chance defects forming which relates to shrinkage (cold shots, shrinkage pores, etc). Another drawback includes entrained air being present, due to the viscosity of the metal being low because of the high pouring temperature.

You might be interested in
How many grams of sodium oxide can be synthesized from 17.4 g of sodium? assume that more than enough oxygen is present. the bal
Tatiana [17]
Equation is as follow,

<span>                          4 Na (s)  +  O</span>₂ <span>(g)    →    2Na</span>₂<span>O (s)

According to equation,

      91.92 g (4 moles) of Na produces  =  123.92 g (2 moles) of Na</span>₂O
So,
                    17.4 g of Na will produce  =  X g of Na₂O

Solving for X,
                                   X  =  (17.4 g × 123.92 g) ÷ 91.92 g

                                   X  =  23.45 g of Na₂O
7 0
3 years ago
Are inic bonds formed when electrons are equally or unequally shared
lisabon 2012 [21]

The electrons are unequally shared. The electronegative element receives the electrons from the electropositive one.

8 0
3 years ago
How many particles are in one mole substance
Karolina [17]

Avogadro's number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022×1023 mol-1 and is expressed as the symbol NA.

6 0
3 years ago
Read 2 more answers
Need help with this can some please help
vekshin1
I believe you would just put a 2 in front of NH3 and keep the other ones as 1
7 0
3 years ago
in heating a kettle of water on an electric stove, 3.34×10^3 J of thermal energy was provided by the element of the stove. yet,
insens350 [35]

Answer:

The percentage efficiency of the electrical element is approximately 82.186%

Explanation:

The given parameters are;

The thermal energy provided by the stove element, H_{supplied} = 3.34 × 10³ J

The amount thermal energy gained by the kettle, H_{absorbed}  = 5.95 × 10² J

The percentage efficiency of the electrical element in heating the kettle of water, η%, is given as follows;

\eta \% = \dfrac{H_{supplied} - H_{absorbed} }{H_{supplied}}  \times 100

Therefore, we get;

\eta \% = \dfrac{3.34 \times 10^3 - 5.95 \times 10^2}{3.34 \times 10^3}  \times 100 = \dfrac{549}{668} \times 100 \approx 82.186 \%

The percentage efficiency of the electrical element, η% ≈ 82.186%.

4 0
3 years ago
Other questions:
  • 7. A pastry chef bakes a cheesecake. What is this an example of?* O Physical Change O Physical Property Chemical Change Chemical
    8·1 answer
  • Find the mass of 250.0mL of benezene. The density of benezene is 0.8765 g/mL
    15·2 answers
  • A car has a displacement of 160 kilometers to the north in 2 hours. What is it’s velocity in kilometers per hour
    11·1 answer
  • _____H2 + _____O2  _____H2O<br> How many grams of water will you make from 7 moles of H2?
    5·1 answer
  • What functional group does the molecule below have?<br><br> *two leg spider looking molecule*
    13·1 answer
  • 1.(03.02 LC)<br> Which of the following best defines weather? (3 points)
    15·1 answer
  • 13. If a chemist has 12.3 moles of N H 03, what is the mass of the sample?​
    11·1 answer
  • The average kinetic energy of water at 25oC is
    8·1 answer
  • If the density of the gas is 1.2 g/L at 745. torr and 20 C, what is its molecular mass?
    11·1 answer
  • What is the equilibrium constant for the reaction?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!