Ask question

Ask question

All categories

kondor19780726 [428]

3 years ago

6

When elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that

make it. true or false

2 answers:

vladimir2022 [97]3 years ago

6 0

Answer:

True

Explanation:

guapka [62]3 years ago

5 0

True i really don’t feel like giving an explanation but trust me it’s trye

You might be interested in

What are the layered soil samples called?

Natalka [10]

Answer:

Soil Horizons

7 0

3 years ago

Read 2 more answers

When a metal was exposed to light at a frequency of 4.07× 1015 s–1, electrons were emitted with a kinetic energy of 3.30× 10–19

Licemer1 [7]

Answer : The maximum number of electrons released = $1.432\times 10^{12}electrons$

Explanation : Given,

Frequency = $4.07\times 10^{15}s^{-1}$

Kinetic energy = $3.30\times 10^{-19}J$

Total energy = $3.39\times 10^{-7}J$

First we have to calculate the work function of the metal.

Formula used :

$K.E=h\nu -w$

where,

K.E = kinetic energy

h = Planck's constant = $6.626\times 10^{-34}J/s$

$\nu$ = frequency

w = work function

Now put all the given values in this formula, we get the work function of the metal.

$3.30\times 10^{-19}J=(6.626\times 10^{-34}J/s\times 4.07\times 10^{15}s^{-1})-w$

By rearranging the terms, we get

$w=2.367\times 10^{-18}J$

Therefore, the works function of the metal is, $2.367\times 10^{-18}J$

Now we have to calculate the maximum number of electrons released.

The maximum number of electrons released = $\frac{\text{ Total energy}}{\text{ work function}}$

The maximum number of electrons released = $\frac{3.39\times 10^{-7}J}{2.367\times 10^{-19}J}=1.432\times 10^{12}electrons$

Therefore, the maximum number of electrons released is $1.432\times 10^{12}electrons$

8 0

3 years ago

The sum of the protons and neutrons in the nucleus of an atom is called the _____?

True [87]

The sun of the protons a D neutrons in the nucleus of an atom is called the ATOMIC MASS

4 0

3 years ago

What's the difference between series and parallel circuit in table form?

schepotkina [342]

Hey :)

In a parallel circuit, a different amount of current flows through each parallel branch of the circuit.

In the series circuit, different voltage exists across each component in the circuit.

Whereas in the parallel circuit, the same voltage exists across the multiple components in the circuit.

Hope this helps :)

5 0

3 years ago

Read 2 more answers

Nitrogen and hydrogen combine to form ammonia in the Haber process. Calculate (in kJ/mole) the standard enthalpy change DH° for

MrRa [10]

Answer: 104 KJ mol

Each NH3 has 3 N-H bonds

Explanation:

Enthalpy change(DHo)= sum t enthalpy of products - sum of enthalpy of Reactants

DHo= 2x3 dHo (N-H) - {dHo(N2)+3dHo(H-H)}

= 6(391)-(945+3(432))

=2346-(945+1296)

=2346-2241

DHo= 105 KJ/mole

4 0

3 years ago

Read 2 more answers