Shown below is a model of SiH4 having an orientation in which one or more atoms are hidden from view.What is the indicated bond angle? 
Definitions:
Treasury Yield Curve
A graphical representation showing the yields on U.S. Treasury securities at fixed maturities, indicating the relationship between interest rates and the length of time to maturity.
Short-term Yields
Interest rates or returns on investments or securities that mature in a short period, typically less than one year.
A Credit Rating
A measure used by creditors to determine the ability of a borrower to pay back debt.
Bond Prices
The market price at which a bond is traded, which can fluctuate based on interest rates and the bond’s credit rating among other factors.
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