Ask question

Ask question

All categories

3 years ago

15

According to the periodic table, which two elements are in the same row? A. copper and gold B. sodium and sulfur C. lithium and

silicon D. barium and uranium

1 answer:

Korolek [52]3 years ago

4 0

I think the answer is B. Correct me if i'm wrong :)

You might be interested in

The moon lost its volcanic __ beacuse of its weak gravity

matrenka [14]

Answer:

Explanation:

the moon is still volcanic

5 0

3 years ago

Glass is different from a mineral because it ________. select one:

SashulF [63]

The correct answer is A. Glass does not have an orderly arrangement of the atoms, like the minerals. Glass lacks a crystal lattice structure, and is an amorphous solid. The atoms of glass are rigidly fixed but are arranged in an orderly fashion.

7 0

3 years ago

Read 2 more answers

The chemical reaction shown above takes place in a closed system. What is true about the system while the reaction occurs?

castortr0y [4]

C.
Matter can not be created or destroyed, so in a closed system it stays constant

5 0

3 years ago

Read 2 more answers

A chromium oxide compound contains 104.0 grams of chromium and 48.0 grams of oxygen. What is the most likely empirical formula o

TEA [102]

Answer: Empirical formula of this compound is $Cr_2O_3$

Explanation:

Mass of Cr= 104.0 g

Mass of O = 48.0 g

Step 1 : convert given masses into moles.

Moles of Cr = $\frac{\text{ given mass of Cr}}{\text{ molar mass of Cr}}= \frac{104.0g}{52g/mole}=2moles$

Moles of O = $\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{48.0g}{16g/mole}=3moles$

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For Cr = $\frac{2}{2}=1$

For O = $\frac{3}{2}=1.5$

Converting into simple whole number ratios by multiplying by 2

The ratio of Cr : O= 2: 3

Hence the empirical formula is $Cr_2O_3$

The most likely empirical formula of this compound is $Cr_2O_3$

4 0

3 years ago

2. Which statement is false about the atoms of a given element?

Digiron [165]

B. They are the same as the atoms of all other elements

5 0

3 years ago