3 years ago

Which of these illustration shows isotopes of the elements boron b

1 answer:

5 0

The isotopes are elements with the same number of protons but different number of neutrons.

Boron atomic number is 5. That is the number of protons.

The natural occurring isotopes of boron contain 5 or 6 neutrons. Other, non stable isotopes, contain from 1 to 16 neutrons.

You might be interested in

what is the answer, don't have to show proof but explain how that's all!!!!!! will mark brainliest this is science class by the

just olya [345]

Answer:

B. Corn needs rain to grow, but too much rain is harmful.

7 0

3 years ago

Which of the following is true about science? (10 points)

Sedaia [141]

Economic concerns is the correct one

7 0

3 years ago

If 14.3 moles of H2O2 is decomposed, how many grams of oxygen gas are produced?

Studentka2010 [4]

The balanced chemical reaction would be as follows:

2H2O2 = 2H2O + O2

We are given the amount of the peroxide that decomposes. Using this as the starting point for the calculations, we can determine the amount of O2 produced. We do as follows:

14.3 mol H2O2 ( 1 mol O2 / 2 mol H2O2 ) = 7.15 mol O2 produced

5 0

3 years ago

Read 2 more answers

I really need the answers please!

krek1111 [17]

1) D = 13.6 g / mL

2)ethyl alcohol weighs 158g

3)ρ _copper = 8.9 g $cm^{3}$

Explanation:

D = m / V

=306.0 g / 22.5 mL

D= 13.6 g / mL

density = mass / volume

mass = density × volume

=0.789g /ml × 200.0 ml

M=158g

Ethyl alcohol weighs 158g

ρ (density) = Mass / Volume

ρ _copper = 1896 g / 8.4cm × 5.5cm × 4.6cm

= 1896g / 212.5 $cm^{3}$

ρ _copper=8.9 g $cm^{3}$

4 0

3 years ago

How many mL of a 0.250M sodium hydroxide solution is needed to neutralize 25.0 mL of a 0.430M sulfuric acid solution?

kotykmax [81]

Answer:

86.0 mL

Explanation:

i just did the USA test prep

5 0

3 years ago