3 years ago

I need help for my HW Assignment

1 answer:

7 0

- 402 has 3 sig figs.
- 0.00560 has 3 sig figs.
- 34.20 has 3 sig figs.
- 6546 has 4 sig figs.
- 45000 has 2 sig figs.

hope this helps :)

You might be interested in

Choose the pure substance from the list below. choose the pure substance from the list below. lemonade wine air juice salt

vfiekz [6]

I believe the answer is salt. because it is a compound of two distinct elements that can be broken down without changing the properties of substance.
A pure substance is a substance that are made up of only one type of an atom or one type of a molecule. Pure substances may be further broken down into elements and compounds.

3 0

3 years ago

Silicon has three naturally occurring isotopes. Silicon-28 has a mass of 27.98 and a relative abundance of 92.23%. Silicon-29 ha

Advocard [28]

The weighted average atomic mass of Silicon is 28.1

(27.98 x .9223) + (28.98 x .0468) + (29.97 x .0309)
= 25.81 + 1.36 + .93
= 28.1

5 0

3 years ago

Read 2 more answers

What is indicated by the methyl-prefix?

lozanna [386]

Answer:

B.) The molecule is a branched hydrocarbon.

Explanation:

A hydrocarbon is any molecule made up of carbon and hydrogen exclusively. A methyl- prefix denotes the presence of a methyl group (CH₃), which is situated as a branch off of a hydrocarbon carbon.

6 0

1 year ago

Which of the following has higher ionization energy - Be or Ca. Explain your choice in terms of attractive force between protons

Vlad [161]

Answer:

Ca has the greater Ionization Energy because the Trend is I/e decreases as you move down a group. Therefore, Ca has the greater I/e

Explanation:

3 0

3 years ago

There are 7 named classes of hazardous materials.<br> O True<br> O False

Anika [276]

False

there is actually 9

7 0

2 years ago