All categories

4 years ago

HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP

Chemistry

2 answers:

labwork [276]4 years ago

4 0

Answer:
6(3) - 4 + (3)^2

Explanation:
We are given that:
f(x) = 4-x^2
g(x) = 6x

First, we will compute (g-f)(x) as follows:
(g-f)(x) = 6x - (4-x^2) = 6x - 4 + x^2

Now, we will substitute with x=3 as follows:
(g-f)(3) = 6(3) - 4 + (3)^2

Hope this helps :)

ozzi4 years ago

3 0

The answer is the third option.

6(3) - 4 + 3²

You might be interested in

What are the fastest growing cells in the human body?

Blababa [14]

The fastest growing cells are c. Skin Cells.

4 0

3 years ago

If a girl is dating a guy and the guy is a catfish, what should the girl do to prove it?

dolphi86 [110]

The girl should first prevent getting scammed. She shouldn’t be sharing any personal information about herself or anybody else. Then to try to prove, she can maybe ask to face time during the day, or asks him out to go somewhere(park,movies,etc.,) but make sure you take someone with you like a trusted adult or someone older, and if he keeps making excuses and denying then it’s pretty clear it’s a catfish.

3 0

3 years ago

Explan respinsible behaviour inthe computer

const2013 [10]

Answer:

This can be done with Python. If you learn machine learning, you can use python to automate your computers to do things.

<h3>2 things you can do with a computer with python + more</h3>

Make and run games or applications easier

Your computer can send or tell you messages at a given time.

I hope this answers you. If not, I may change something accordingly.

8 0

3 years ago

Read 2 more answers

This reaction is sometimes used to inflate life rafts, weather balloons, and the like, where a simple, compact means of generati

tia_tia [17]

Answer: 10.2 grams

Explanation:

The balanced chemical reaction is :

$CaH_2(s)+2H_2O(l)\rightarrow Ca(OH)_2(aq)+2H_2(g)$

According to the ideal gas equation:

$PV=nRT$

P = Pressure of the gas = 740 torr = 0.97 atm (760torr=1atm)

V= Volume of the gas = 12.0 L

T= Temperature of the gas = 19°C = 292 K $0^0C=273K$

R= Gas constant = 0.0821 atmL/K mol

n= moles of gas

$n=\frac{PV}{RT}=\frac{0.97\times 12.0}{0.0821\times 292}$

$n=0.48$

According to stoichiometry:

2 moles of hydrogen are generated by = 1 mole of $CaH_2$

Thus 0.48 moles of hydrogen are generated by = $\frac{1}{2}\times 0.48=0.24$ moles of $CaH_2$

Mass of $CaH_2=moles\times {\text {Molar mass}}=0.24mol\times 42g/mol=10.2g$

Thus 10.2 grams of $CaH_2$ are needed to generate 12.0 L of hydrogen gas if the pressure of hydrogen is 740. torr at 19°C

5 0

3 years ago

What would be the effect on the nucleus of an atom if it emitted one alpha particle and one gamma ray

Oksana_A [137]

Unstable, radioactive atom emits alpha and gamma ray to transform into a stable atom.

Emitting an alpha particle, decreases the mass number by four and atomic number by two.
Emitting gamma ray reduces the excess energy of the radioactive atom.

4 0

3 years ago