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3 years ago

In what kind of reaction do two or more substances combine to form a new compound

Chemistry

1 answer:

Misha Larkins [42]3 years ago

4 0

Answer:

Combination or synthesis

Explanation:

In combination or synthesis, there is formation of a single product from two or more reactants e.g:

H₂ + I₂ → 2HI

Here a compound forms from the association of the consituent elements.

Other kinds of chemical reactions we have are:

Decomposition or cracking
Single replacement or single displacement
Double replacement or double decomposition or metathesis.

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diamond has a density of 3.26 g/cm3. what is the mass of a diamond that has a volume of 0.313 cm cubed

DaniilM [7]

D = m / V

3.26 = m / 0.313

m = 3.26 x 0.313

m = 1.02038 g

hope this helps!

6 0

3 years ago

The molar mass of barium nitrate (ba(no3)2) is 261.35 g/mol. what is the mass of 5.30 × 1022 formula units of ba(no3)2? 0.0900 g

liberstina [14]

Molar mass is the ratio of the mass to that amount of the substance. The mass of the barium nitrate in the formula unit is 23.0 grams.

The mass of a substance is the product of the molar mass of the compound and the number of moles of the compound.

Given,

Molar mass of barium nitrate = 261.35 g/mol

If, $6.022 \times 10^{23}$ have a mass of 261.35 g/mol then, $5.30 \times 10^{22}$ formula units will have a mass of,

$\begin{aligned}& = \dfrac{261.35 \times 5.30 \times 10^{22}}{6.022\times 10^{23}}\\\\&= 23.0\;\rm gm\end{aligned}$

Therefore, option C. 23.0 gm is the mass of barium nitrate.

Learn more about mass here:

brainly.com/question/24958554

6 0

2 years ago

PLEASE HURRY THIS IS TIMED!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

AURORKA [14]

Answer:

if i remember correctly i beleive its A 1.8 x 10^24

but im not for sure also i think you forgot the 24

Explanation:

5 0

3 years ago

Based on the visible light spectrum, which of the following has the longest wavelength?

bezimeni [28]

Answer:

I think the answer is D a ray of violet light

Hope it helps!

7 0

3 years ago

Read 2 more answers

A chemical reaction produces formaldehyde, with a chemical formula of CH2O. Carbon is in group 4A, Oxygen is in group 6A, and Hy

steposvetlana [31]

Answer:

Explanation:

carbon in group 4A needs 4 more electrons to be stable

hydrogen in group 1A has one electron needs 1 more t o be stale

oxygen in group 6A has 6 and needs 2 more to be stable

They all obtain this by sharing electrons 8 around C &O, 2 around H

H : C: H

:O:

5 0

2 years ago