All categories

2 years ago

What’s the answer for this question

Chemistry

1 answer:

pshichka [43]2 years ago

7 0

Answer:

i think it's B

Explanation:

You might be interested in

How many moles are in 9.12 x 1023 molecules of sugar?

aleksandrvk [35]

Answer:

1.514 moles

Explanation:

For this problem you want to use dimensional analysis and cancel out your molecules of sugar and be left with moles of sugar. We know that 1 mole (of anything) = 6.022 x 10 ^ 23 molecules, so we should use that conversion to help us. Start with 9.12 x 10 ^23 molecules and divide by 6.022 x 10 ^ 23 molecules, and you will be left with moles.

Hope this helps!

3 0

2 years ago

Is it physical change or chemical change when you smooth a wood chair with sandpaper?

White raven [17]

It should be a chemical change

8 0

2 years ago

How many liters of 1.5 M HCl solution would react completely with 2.5 moles Ca(OH)2? (2 points)

mylen [45]

Here’s the math for your answer, which is 3.3 L HCl

6 0

3 years ago

Express the following number in scientific notation: 0.000000675.

tekilochka [14]

There are 7 digits from decimal to 1st digit, and it's coming from right, so exponent will be in negative 7

In short, Your Answer would be: Option C) <span>6.75 × 10-7
</span>
Hope this helps!

6 0

3 years ago

The atomic mass of helium-4 is 4.0026 amu. How many of each

umka21 [38]

Answer:

Protons: 2.

Electrons: 2.

Neutrons: 2.

Explanation:

Hello,

In this case, since an atom's atomic number is equal to the number of electrons, considering the electron configurations, taking into account that helium-4 is neither positively nor negatively charged, we can infer that the number of electrons equal the number of protons, which in this case are 2, due to the fact that is atomic number is 2.

Moreover, as helium-4's atomic number is 4 as a whole number, we compute the number of neutrons by using the shown below equation:

$Neutrons=mass\ number-atomic\ number\\\\Neutrons=4-2\\\\Neutrons=2$

Regards.

7 0

2 years ago